Package com.headius.invokebinder
Class Binder
- java.lang.Object
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- com.headius.invokebinder.Binder
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public class Binder extends java.lang.Object
The Binder class provides a DSL for building a chain of MethodHandles using various of the adaptations provided by java.lang.invoke.MethodHandles. The transformations are pushed into a stack, allowing the DSL to operate forward from an incoming signature rather than backward from a target handle. This is often conceptually easier to understand, and certainly easier to read. The transformations are also applied simultaneously to the starting java.lang.invoke.MethodType, allowing Binder to check at each step whether the adaptation is valid. Here's a typical use, starting with a signature that takes two Strings and returns a String, dropping and inserting arguments, casting to a target signature, and finally calling a target handle with that signature.MethodHandle mh = Binder .from(String.class, String.class, String.class) // String w(String, String) .drop(1, String.class) // String x(String) .insert(0, 'hello') // String y(String, String) .cast(String.class, CharSequence.class, Object.class) // String z(CharSequence, Object)String .invoke(someTargetHandle);
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Constructor Summary
Constructors Constructor Description Binder(Binder source)
Construct a new Binder using the given invokebinder.Binder(Binder source, Transform transform)
Construct a new Binder using the given invokebinder plus an additional transformBinder(Binder source, Transform transform, java.lang.invoke.MethodType type)
Construct a new Binder using the given invokebinder plus an additional transform and current typeBinder(java.lang.invoke.MethodHandles.Lookup lookup, Binder source)
Construct a new Binder using the given Lookup and invokebinder.Binder(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given Lookup and MethodType.Binder(java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given MethodType.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description private void
add(Transform transform)
Add a Transform to the chain.private void
add(Transform transform, java.lang.invoke.MethodType target)
Add a Transform with an associated MethodType target to the chain.Binder
append(boolean value)
Append to the argument list the given boolean value.Binder
append(byte value)
Append to the argument list the given byte value.Binder
append(char value)
Append to the argument list the given char value.Binder
append(double value)
Append to the argument list the given double value.Binder
append(float value)
Append to the argument list the given float value.Binder
append(int value)
Append to the argument list the given int value.Binder
append(long value)
Append to the argument list the given long value.Binder
append(short value)
Append to the argument list the given short value.Binder
append(java.lang.Class[] types, java.lang.Object... values)
Append to the argument list the given argument value(s).Binder
append(java.lang.Object... values)
Append to the argument list the given argument value(s).java.lang.invoke.MethodHandle
arrayGet()
Apply the chain of transforms and bind them to an array element get.java.lang.invoke.MethodHandle
arraySet()
Apply the chain of transforms and bind them to an array element set.java.lang.invoke.MethodHandle
branch(java.lang.invoke.MethodHandle test, java.lang.invoke.MethodHandle truePath, java.lang.invoke.MethodHandle falsePath)
Apply the chain of transforms and bind them to a boolean branch as from java.lang.invoke.MethodHandles.guardWithTest.Binder
cast(java.lang.Class returnType, java.lang.Class... argTypes)
Cast the incoming arguments to the given MethodType.Binder
cast(java.lang.invoke.MethodType type)
Cast the incoming arguments to the given MethodType.Binder
catchException(java.lang.Class<? extends java.lang.Throwable> throwable, java.lang.invoke.MethodHandle function)
Catch the given exception type from the downstream chain and handle it with the given function.Binder
collect(int index, java.lang.Class type)
Box all incoming arguments from the given position onward into the given array type.java.lang.invoke.MethodHandle
constant(java.lang.Object value)
Apply the tranforms, binding them to a constant value that will propagate back through the chain.Binder
convert(java.lang.Class returnType, java.lang.Class... argTypes)
Convert the incoming arguments to the given MethodType.Binder
convert(java.lang.invoke.MethodType target)
Convert the incoming arguments to the given MethodType.Binder
drop(int index)
Drop a single argument at the given index.Binder
drop(int index, int count)
Drop from the given index a number of arguments.Binder
dropLast()
Drop a single argument at the end of the argument list.Binder
dropLast(int count)
Drop from the end of the argument list a number of arguments.Binder
filter(int index, java.lang.invoke.MethodHandle... functions)
Filter incoming arguments, starting at the given index, replacing each with the result of calling the associated function in the given list.Binder
filterReturn(java.lang.invoke.MethodHandle function)
Filter return value, using a function that produces the current return type from another type.Binder
fold(java.lang.invoke.MethodHandle function)
Process the incoming arguments using the given handle, inserting the result as the first argument.Binder
foldStatic(java.lang.Class target, java.lang.String method)
Process the incoming arguments by calling the given static method on the given class, inserting the result as the first argument.Binder
foldStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String method)
Process the incoming arguments by calling the given static method on the given class, inserting the result as the first argument.Binder
foldVirtual(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String method)
Process the incoming arguments by calling the given method on the first argument, inserting the result as the first argument.Binder
foldVirtual(java.lang.String method)
Process the incoming arguments by calling the given method on the first argument, inserting the result as the first argument.Binder
foldVoid(java.lang.invoke.MethodHandle function)
static Binder
from(Binder start)
Construct a new Binder, starting from a given invokebinder.static Binder
from(java.lang.Class returnType)
Construct a new Binder using a return type.static Binder
from(java.lang.Class returnType, java.lang.Class[] argTypes)
Construct a new Binder using a return type and argument types.static Binder
from(java.lang.Class returnType, java.lang.Class argType0, java.lang.Class... argTypes)
Construct a new Binder using a return type and argument types.static Binder
from(java.lang.invoke.MethodHandles.Lookup lookup, Binder start)
Construct a new Binder, starting from a given invokebinder.static Binder
from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class returnType)
Construct a new Binder using a return type.static Binder
from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class returnType, java.lang.Class[] argTypes)
Construct a new Binder using a return type and argument types.static Binder
from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class returnType, java.lang.Class argType0, java.lang.Class... argTypes)
Construct a new Binder using a return type and argument types.static Binder
from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given MethodType.static Binder
from(java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given MethodType.java.lang.invoke.MethodHandle
getField(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to an object field retrieval specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
getFieldQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to an object field retrieval specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
getStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to a static field retrieval specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
getStaticQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to a static field retrieval specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
identity()
Apply the tranforms, binding them to a handle that will simply return its sole argument as its return value.Binder
insert(int index, boolean value)
Insert at the given index the given boolean value.Binder
insert(int index, byte value)
Insert at the given index the given byte value.Binder
insert(int index, char value)
Insert at the given index the given char value.Binder
insert(int index, double value)
Insert at the given index the given double value.Binder
insert(int index, float value)
Insert at the given index the given float value.Binder
insert(int index, int value)
Insert at the given index the given int value.Binder
insert(int index, long value)
Insert at the given index the given long value.Binder
insert(int index, short value)
Insert at the given index the given short value.Binder
insert(int index, java.lang.Class[] types, java.lang.Object... values)
Insert at the given index the given argument value(s).Binder
insert(int index, java.lang.Object... values)
Insert at the given index the given argument value(s).java.lang.invoke.MethodHandle
invoke(java.lang.invoke.MethodHandle target)
Apply the chain of transforms with the target method handle as the final endpoint.java.lang.invoke.MethodHandle
invoke(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.reflect.Method method)
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and method.java.lang.invoke.MethodHandle
invokeConstructor(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target)
Apply the chain of transforms and bind them to a constructor specified using the end signature plus the given class.java.lang.invoke.MethodHandle
invokeConstructorQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target)
Apply the chain of transforms and bind them to a constructor specified using the end signature plus the given class.java.lang.invoke.MethodHandle
invokeQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.reflect.Method method)
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and method.java.lang.invoke.MethodHandle
invoker()
Produce a MethodHandle that invokes its leading MethodHandle argument with the remaining arguments, returning the result.java.lang.invoke.MethodHandle
invokeSpecial(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name, java.lang.Class caller)
Apply the chain of transforms and bind them to a special method specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
invokeSpecialQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name, java.lang.Class caller)
Apply the chain of transforms and bind them to a special method specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
invokeStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
invokeStaticQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
invokeVirtual(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to a virtual method specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
invokeVirtualQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to a virtual method specified using the end signature plus the given class and name.Binder
logType()
Log the current MethodType as info.java.lang.invoke.MethodHandle
nop()
Apply all transforms to an endpoint that does absolutely nothing.Binder
permute(int... reorder)
Permute the incoming arguments to a new sequence specified by the given values.Binder
prepend(boolean value)
Prepend to the argument list the given boolean value.Binder
prepend(byte value)
Prepend to the argument list the given byte value.Binder
prepend(char value)
Prepend to the argument list the given char value.Binder
prepend(double value)
Prepend to the argument list the given double value.Binder
prepend(float value)
Prepend to the argument list the given float value.Binder
prepend(int value)
Prepend to the argument list the given int value.Binder
prepend(long value)
Prepend to the argument list the given long value.Binder
prepend(short value)
Prepend to the argument list the given short value.Binder
prepend(java.lang.Object... values)
Prepend to the argument list the given argument value(s).Binder
printType()
Println the current MethodType to stdout.Binder
printType(java.io.PrintStream ps)
Println the current MethodType to the given stream.java.lang.invoke.MethodHandle
setField(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
setFieldQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
setStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name.java.lang.invoke.MethodHandle
setStaticQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name.Binder
spread(int count)
Spread a trailing array argument into the given number of arguments of the type of the array.Binder
spread(java.lang.Class... spreadTypes)
Spread a trailing array argument into the specified argument types.java.lang.invoke.MethodHandle
throwException()
Throw the current signature's sole Throwable argument.Binder
to(Binder other)
Join this binder to an existing one by applying its transformations after this one.Binder
tryFinally(java.lang.invoke.MethodHandle post)
Apply transforms to run the given handle's logic as a "finally" block.java.lang.invoke.MethodType
type()
The current MethodType, were the handle chain to terminate at this point.Binder
varargs(int index, java.lang.Class type)
Box all incoming arguments from the given position onward into the given array type.Binder
withLookup(java.lang.invoke.MethodHandles.Lookup lookup)
Use an alternate java.lang.invoke.MethodHandles.Lookup as the default for any direct handles created.
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Field Detail
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logger
private final java.util.logging.Logger logger
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transforms
private final java.util.List<Transform> transforms
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types
private final java.util.List<java.lang.invoke.MethodType> types
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start
private final java.lang.invoke.MethodType start
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lookup
private final java.lang.invoke.MethodHandles.Lookup lookup
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Constructor Detail
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Binder
public Binder(java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given MethodType. Use a public java.lang.invoke.MethodHandles.Lookup for retrieving direct handles.- Parameters:
start
- the starting MethodType, for calls entering the eventual chain
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Binder
public Binder(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given Lookup and MethodType.- Parameters:
lookup
- the Lookup context to use for direct handlesstart
- the starting MethodType, for calls entering the eventual chain
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Binder
public Binder(Binder source)
Construct a new Binder using the given invokebinder.
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Binder
public Binder(java.lang.invoke.MethodHandles.Lookup lookup, Binder source)
Construct a new Binder using the given Lookup and invokebinder.- Parameters:
lookup
- the Lookup context to use for direct handlessource
- the source Binder
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Binder
public Binder(Binder source, Transform transform)
Construct a new Binder using the given invokebinder plus an additional transform- Parameters:
source
- the source Bindertransform
- the additional Transform
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Binder
public Binder(Binder source, Transform transform, java.lang.invoke.MethodType type)
Construct a new Binder using the given invokebinder plus an additional transform and current type- Parameters:
source
- the source Bindertransform
- the additional Transformtype
- the new current type resulting from the transform
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Method Detail
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from
public static Binder from(java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given MethodType.- Parameters:
start
- the starting MethodType, for calls entering the eventual chain- Returns:
- the Binder object
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from
public static Binder from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.invoke.MethodType start)
Construct a new Binder, starting from a given MethodType.- Parameters:
lookup
- the Lookup context to use for direct handlesstart
- the starting MethodType, for calls entering the eventual chain- Returns:
- the Binder object
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from
public static Binder from(java.lang.Class returnType)
Construct a new Binder using a return type.- Parameters:
returnType
- the return type of the incoming signature- Returns:
- the Binder object
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from
public static Binder from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class returnType)
Construct a new Binder using a return type.- Parameters:
lookup
- the Lookup context to use for direct handlesreturnType
- the return type of the incoming signature- Returns:
- the Binder object
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from
public static Binder from(java.lang.Class returnType, java.lang.Class[] argTypes)
Construct a new Binder using a return type and argument types.- Parameters:
returnType
- the return type of the incoming signatureargTypes
- the argument types of the incoming signature- Returns:
- the Binder object
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from
public static Binder from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class returnType, java.lang.Class[] argTypes)
Construct a new Binder using a return type and argument types.- Parameters:
lookup
- the Lookup context to use for direct handlesreturnType
- the return type of the incoming signatureargTypes
- the argument types of the incoming signature- Returns:
- the Binder object
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from
public static Binder from(java.lang.Class returnType, java.lang.Class argType0, java.lang.Class... argTypes)
Construct a new Binder using a return type and argument types.- Parameters:
returnType
- the return type of the incoming signatureargType0
- the first argument type of the incoming signatureargTypes
- the remaining argument types of the incoming signature- Returns:
- the Binder object
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from
public static Binder from(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class returnType, java.lang.Class argType0, java.lang.Class... argTypes)
Construct a new Binder using a return type and argument types.- Parameters:
lookup
- the Lookup context to use for direct handlesreturnType
- the return type of the incoming signatureargType0
- the first argument type of the incoming signatureargTypes
- the remaining argument types of the incoming signature- Returns:
- the Binder object
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from
public static Binder from(Binder start)
Construct a new Binder, starting from a given invokebinder.- Parameters:
start
- the starting invokebinder; the new one will start with the current endpoint type of the given invokebinder- Returns:
- the Binder object
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from
public static Binder from(java.lang.invoke.MethodHandles.Lookup lookup, Binder start)
Construct a new Binder, starting from a given invokebinder.- Parameters:
lookup
- the Lookup context to use for direct handlesstart
- the starting invokebinder; the new one will start with the current endpoint type of the given invokebinder- Returns:
- the Binder object
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to
public Binder to(Binder other)
Join this binder to an existing one by applying its transformations after this one.- Parameters:
other
- the Binder containing the set of transformations to append- Returns:
- a new Binder combining this Binder with the target Binder
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withLookup
public Binder withLookup(java.lang.invoke.MethodHandles.Lookup lookup)
Use an alternate java.lang.invoke.MethodHandles.Lookup as the default for any direct handles created.- Parameters:
lookup
- the new Lookup context to use- Returns:
- a new Binder with the given lookup
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add
private void add(Transform transform)
Add a Transform to the chain.- Parameters:
transform
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add
private void add(Transform transform, java.lang.invoke.MethodType target)
Add a Transform with an associated MethodType target to the chain.- Parameters:
transform
-target
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type
public java.lang.invoke.MethodType type()
The current MethodType, were the handle chain to terminate at this point.- Returns:
- the current MethodType
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printType
public Binder printType(java.io.PrintStream ps)
Println the current MethodType to the given stream.- Returns:
- this Binding
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printType
public Binder printType()
Println the current MethodType to stdout.- Returns:
- this Binding
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logType
public Binder logType()
Log the current MethodType as info.- Returns:
- this Binding
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insert
public Binder insert(int index, boolean value)
Insert at the given index the given boolean value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, byte value)
Insert at the given index the given byte value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, short value)
Insert at the given index the given short value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, char value)
Insert at the given index the given char value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, int value)
Insert at the given index the given int value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, long value)
Insert at the given index the given long value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, float value)
Insert at the given index the given float value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, double value)
Insert at the given index the given double value.- Parameters:
index
- the index at which to insert the argument valuevalue
- the value to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, java.lang.Object... values)
Insert at the given index the given argument value(s).- Parameters:
index
- the index at which to insert the argument valuevalues
- the value(s) to insert- Returns:
- a new Binder
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insert
public Binder insert(int index, java.lang.Class[] types, java.lang.Object... values)
Insert at the given index the given argument value(s).- Parameters:
index
- the index at which to insert the argument valuetypes
- the actual types to use, rather than getClassvalues
- the value(s) to insert- Returns:
- a new Binder
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append
public Binder append(boolean value)
Append to the argument list the given boolean value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(byte value)
Append to the argument list the given byte value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(short value)
Append to the argument list the given short value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(char value)
Append to the argument list the given char value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(int value)
Append to the argument list the given int value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(long value)
Append to the argument list the given long value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(float value)
Append to the argument list the given float value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(double value)
Append to the argument list the given double value.- Parameters:
value
- the value to append- Returns:
- a new Binder
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append
public Binder append(java.lang.Object... values)
Append to the argument list the given argument value(s).- Parameters:
values
- the value(s) to append- Returns:
- a new Binder
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prepend
public Binder prepend(boolean value)
Prepend to the argument list the given boolean value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(byte value)
Prepend to the argument list the given byte value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(short value)
Prepend to the argument list the given short value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(char value)
Prepend to the argument list the given char value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(int value)
Prepend to the argument list the given int value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(long value)
Prepend to the argument list the given long value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(float value)
Prepend to the argument list the given float value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(double value)
Prepend to the argument list the given double value.- Parameters:
value
- the value to prepend- Returns:
- a new Binder
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prepend
public Binder prepend(java.lang.Object... values)
Prepend to the argument list the given argument value(s).- Parameters:
values
- the value(s) to prepend- Returns:
- a new Binder
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append
public Binder append(java.lang.Class[] types, java.lang.Object... values)
Append to the argument list the given argument value(s).- Parameters:
types
- the actual types to use, rather than getClassvalues
- the value(s) to append- Returns:
- a new Binder
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drop
public Binder drop(int index)
Drop a single argument at the given index.- Parameters:
index
- the index at which to drop an argument- Returns:
- a new Binder
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drop
public Binder drop(int index, int count)
Drop from the given index a number of arguments.- Parameters:
index
- the index at which to start droppingcount
- the number of arguments to drop- Returns:
- a new Binder
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dropLast
public Binder dropLast()
Drop a single argument at the end of the argument list.- Returns:
- a new Binder
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dropLast
public Binder dropLast(int count)
Drop from the end of the argument list a number of arguments.- Parameters:
count
- the number of arguments to drop- Returns:
- a new Binder
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convert
public Binder convert(java.lang.invoke.MethodType target)
Convert the incoming arguments to the given MethodType. The conversions applied are equivalent to those in MethodHandle.asType(MethodType).- Parameters:
target
- the target MethodType- Returns:
- a new Binder
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convert
public Binder convert(java.lang.Class returnType, java.lang.Class... argTypes)
Convert the incoming arguments to the given MethodType. The conversions applied are equivalent to those in MethodHandle.asType(MethodType).- Parameters:
returnType
- the target return typeargTypes
- the target argument types- Returns:
- a new Binder
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cast
public Binder cast(java.lang.invoke.MethodType type)
Cast the incoming arguments to the given MethodType. The casts applied are equivalent to those in MethodHandles.explicitCastArguments(mh, MethodType).- Parameters:
type
- the target MethodType- Returns:
- a new Binder
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cast
public Binder cast(java.lang.Class returnType, java.lang.Class... argTypes)
Cast the incoming arguments to the given MethodType. The casts applied are equivalent to those in MethodHandle.explicitCastArguments(MethodType).- Parameters:
returnType
- the target return typeargTypes
- the target argument types- Returns:
- a new Binder
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spread
public Binder spread(java.lang.Class... spreadTypes)
Spread a trailing array argument into the specified argument types.- Parameters:
spreadTypes
- the types into which to spread the incoming Object[]- Returns:
- a new Binder
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spread
public Binder spread(int count)
Spread a trailing array argument into the given number of arguments of the type of the array.- Parameters:
count
- the new count of arguments to spread from the trailing array- Returns:
- a new Binder
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collect
public Binder collect(int index, java.lang.Class type)
Box all incoming arguments from the given position onward into the given array type.- Parameters:
index
- the index from which to start boxing argstype
- the array type into which the args will be boxed- Returns:
- a new Binder
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varargs
public Binder varargs(int index, java.lang.Class type)
Box all incoming arguments from the given position onward into the given array type. This version accepts a variable number of incoming arguments.- Parameters:
index
- the index from which to start boxing argstype
- the array type into which the args will be boxed- Returns:
- a new Binder
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permute
public Binder permute(int... reorder)
Permute the incoming arguments to a new sequence specified by the given values. Arguments may be duplicated or dropped in this sequence.- Parameters:
reorder
- the int offsets of the incoming arguments in the desired permutation- Returns:
- a new Binder
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fold
public Binder fold(java.lang.invoke.MethodHandle function)
Process the incoming arguments using the given handle, inserting the result as the first argument.- Parameters:
function
- the function that will process the incoming arguments. Its signature must match the current signature's arguments exactly.- Returns:
- a new Binder
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foldVoid
public Binder foldVoid(java.lang.invoke.MethodHandle function)
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foldStatic
public Binder foldStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String method)
Process the incoming arguments by calling the given static method on the given class, inserting the result as the first argument.- Parameters:
lookup
- the java.lang.invoke.MethodHandles.Lookup to usetarget
- the class on which the method is definedmethod
- the method to invoke on the first argument- Returns:
- a new Binder
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foldStatic
public Binder foldStatic(java.lang.Class target, java.lang.String method)
Process the incoming arguments by calling the given static method on the given class, inserting the result as the first argument.- Parameters:
target
- the class on which the method is definedmethod
- the method to invoke on the first argument- Returns:
- a new Binder
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foldVirtual
public Binder foldVirtual(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String method)
Process the incoming arguments by calling the given method on the first argument, inserting the result as the first argument.- Parameters:
lookup
- the java.lang.invoke.MethodHandles.Lookup to usemethod
- the method to invoke on the first argument- Returns:
- a new Binder
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foldVirtual
public Binder foldVirtual(java.lang.String method)
Process the incoming arguments by calling the given method on the first argument, inserting the result as the first argument.- Parameters:
method
- the method to invoke on the first argument- Returns:
- a new Binder
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filter
public Binder filter(int index, java.lang.invoke.MethodHandle... functions)
Filter incoming arguments, starting at the given index, replacing each with the result of calling the associated function in the given list.- Parameters:
index
- the index of the first argument to filterfunctions
- the array of functions to transform the arguments- Returns:
- a new Binder
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filterReturn
public Binder filterReturn(java.lang.invoke.MethodHandle function)
Filter return value, using a function that produces the current return type from another type. The new endpoint will have the return value that the filter function accepts as an argument.- Parameters:
function
- the array of functions to transform the arguments- Returns:
- a new Binder
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tryFinally
public Binder tryFinally(java.lang.invoke.MethodHandle post)
Apply transforms to run the given handle's logic as a "finally" block. try { some_code // your eventual endpoint } finally { finally_logic // the given handle } The layering uses a combination of catch and fold to reuse the same target handle for both exceptional and non-exceptional paths. In essence, the result is equivalent to using the given post logic as both an exception handler (using catchException) and a "post fold" that runs after the main downstream handles have run.- Parameters:
post
- the logic that would live inside the "finally" block- Returns:
- a new Binder
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catchException
public Binder catchException(java.lang.Class<? extends java.lang.Throwable> throwable, java.lang.invoke.MethodHandle function)
Catch the given exception type from the downstream chain and handle it with the given function.- Parameters:
throwable
- the exception type to catchfunction
- the function to use for handling the exception- Returns:
- a new Binder
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nop
public java.lang.invoke.MethodHandle nop()
Apply all transforms to an endpoint that does absolutely nothing. Useful for creating exception handlers in void methods that simply ignore the exception.- Returns:
- a handle that has all transforms applied and does nothing at its endpoint
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throwException
public java.lang.invoke.MethodHandle throwException()
Throw the current signature's sole Throwable argument. Return type does not matter, since it will never return.- Returns:
- a handle that has all transforms applied and which will eventually throw an exception
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constant
public java.lang.invoke.MethodHandle constant(java.lang.Object value)
Apply the tranforms, binding them to a constant value that will propagate back through the chain. The chain's expected return type at that point must be compatible with the given value's type.- Parameters:
value
- the constant value to put at the end of the chain- Returns:
- a handle that has all transforms applied in sequence up to the constant
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identity
public java.lang.invoke.MethodHandle identity()
Apply the tranforms, binding them to a handle that will simply return its sole argument as its return value. The endpoint signature must have a single argument of the same type as its return type.- Returns:
- a handle that has all transforms applied in sequence
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invoke
public java.lang.invoke.MethodHandle invoke(java.lang.invoke.MethodHandle target)
Apply the chain of transforms with the target method handle as the final endpoint. Produces a handle that has the transforms in given sequence. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
target
- the endpoint handle to bind to- Returns:
- a handle that has all transforms applied in sequence up to endpoint
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invoke
public java.lang.invoke.MethodHandle invoke(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.reflect.Method method) throws java.lang.IllegalAccessException
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and method. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to unreflect the methodmethod
- the Method to unreflect- Returns:
- the full handle chain, bound to the given method
- Throws:
java.lang.IllegalAccessException
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invokeQuiet
public java.lang.invoke.MethodHandle invokeQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.reflect.Method method)
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and method. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to unreflect the methodmethod
- the Method to unreflect- Returns:
- the full handle chain, bound to the given method
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invokeStatic
public java.lang.invoke.MethodHandle invokeStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and name. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to unreflect the methodtarget
- the class in which to find the methodname
- the name of the method to invoke- Returns:
- the full handle chain, bound to the given method
- Throws:
java.lang.NoSuchMethodException
java.lang.IllegalAccessException
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invokeStaticQuiet
public java.lang.invoke.MethodHandle invokeStaticQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to a static method specified using the end signature plus the given class and name. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the methodtarget
- the class in which to find the methodname
- the name of the method to invoke- Returns:
- the full handle chain, bound to the given method
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invokeVirtual
public java.lang.invoke.MethodHandle invokeVirtual(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to a virtual method specified using the end signature plus the given class and name. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the methodname
- the name of the method to invoke- Returns:
- the full handle chain, bound to the given method
- Throws:
java.lang.NoSuchMethodException
java.lang.IllegalAccessException
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invokeVirtualQuiet
public java.lang.invoke.MethodHandle invokeVirtualQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to a virtual method specified using the end signature plus the given class and name. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the methodname
- the name of the method to invoke- Returns:
- the full handle chain, bound to the given method
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invokeSpecial
public java.lang.invoke.MethodHandle invokeSpecial(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name, java.lang.Class caller) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to a special method specified using the end signature plus the given class and name. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the methodname
- the name of the method to invokecaller
- the calling class- Returns:
- the full handle chain, bound to the given method
- Throws:
java.lang.NoSuchMethodException
java.lang.IllegalAccessException
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invokeSpecialQuiet
public java.lang.invoke.MethodHandle invokeSpecialQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name, java.lang.Class caller)
Apply the chain of transforms and bind them to a special method specified using the end signature plus the given class and name. The method will be retrieved using the given Lookup and must match the end signature exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the methodname
- the name of the method to invokecaller
- the calling class- Returns:
- the full handle chain, bound to the given method
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invokeConstructor
public java.lang.invoke.MethodHandle invokeConstructor(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to a constructor specified using the end signature plus the given class. The constructor will be retrieved using the given Lookup and must match the end signature's arguments exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the constructortarget
- the constructor's class- Returns:
- the full handle chain, bound to the given constructor
- Throws:
java.lang.NoSuchMethodException
java.lang.IllegalAccessException
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invokeConstructorQuiet
public java.lang.invoke.MethodHandle invokeConstructorQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target)
Apply the chain of transforms and bind them to a constructor specified using the end signature plus the given class. The constructor will be retrieved using the given Lookup and must match the end signature's arguments exactly. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the constructortarget
- the constructor's class- Returns:
- the full handle chain, bound to the given constructor
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getField
public java.lang.invoke.MethodHandle getField(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name) throws java.lang.NoSuchFieldException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to an object field retrieval specified using the end signature plus the given class and name. The field must match the end signature's return value and the end signature must take the target class or a subclass as its only argument. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldname
- the field's name- Returns:
- the full handle chain, bound to the given field access
- Throws:
java.lang.NoSuchFieldException
java.lang.IllegalAccessException
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getFieldQuiet
public java.lang.invoke.MethodHandle getFieldQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to an object field retrieval specified using the end signature plus the given class and name. The field must match the end signature's return value and the end signature must take the target class or a subclass as its only argument. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldname
- the field's name- Returns:
- the full handle chain, bound to the given field access
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getStatic
public java.lang.invoke.MethodHandle getStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name) throws java.lang.NoSuchFieldException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to a static field retrieval specified using the end signature plus the given class and name. The field must match the end signature's return value and the end signature must take no arguments. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldtarget
- the class in which the field is definedname
- the field's name- Returns:
- the full handle chain, bound to the given field access
- Throws:
java.lang.NoSuchFieldException
java.lang.IllegalAccessException
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getStaticQuiet
public java.lang.invoke.MethodHandle getStaticQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to a static field retrieval specified using the end signature plus the given class and name. The field must match the end signature's return value and the end signature must take no arguments. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldtarget
- the class in which the field is definedname
- the field's name- Returns:
- the full handle chain, bound to the given field access
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setField
public java.lang.invoke.MethodHandle setField(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name) throws java.lang.NoSuchFieldException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name. The end signature must take the target class or a subclass and the field's type as its arguments, and its return type must be compatible with void. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldname
- the field's name- Returns:
- the full handle chain, bound to the given field assignment
- Throws:
java.lang.NoSuchFieldException
java.lang.IllegalAccessException
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setFieldQuiet
public java.lang.invoke.MethodHandle setFieldQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.String name)
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name. The end signature must take the target class or a subclass and the field's type as its arguments, and its return type must be compatible with void. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldname
- the field's name- Returns:
- the full handle chain, bound to the given field assignment
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setStatic
public java.lang.invoke.MethodHandle setStatic(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name) throws java.lang.NoSuchFieldException, java.lang.IllegalAccessException
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name. The end signature must take the target class or a subclass and the field's type as its arguments, and its return type must be compatible with void. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldtarget
- the class in which the field is definedname
- the field's name- Returns:
- the full handle chain, bound to the given field assignment
- Throws:
java.lang.NoSuchFieldException
java.lang.IllegalAccessException
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setStaticQuiet
public java.lang.invoke.MethodHandle setStaticQuiet(java.lang.invoke.MethodHandles.Lookup lookup, java.lang.Class target, java.lang.String name)
Apply the chain of transforms and bind them to an object field assignment specified using the end signature plus the given class and name. The end signature must take the target class or a subclass and the field's type as its arguments, and its return type must be compatible with void. If the final handle's type does not exactly match the initial type for this Binder, an additional cast will be attempted. This version is "quiet" in that it throws an unchecked InvalidTransformException if the target method does not exist or is inaccessible.- Parameters:
lookup
- the MethodHandles.Lookup to use to look up the fieldtarget
- the class in which the field is definedname
- the field's name- Returns:
- the full handle chain, bound to the given field assignment
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arraySet
public java.lang.invoke.MethodHandle arraySet()
Apply the chain of transforms and bind them to an array element set. The signature at the endpoint must return void and receive the array type, int index, and array element type.- Returns:
- the full handle chain, bound to an array element set.
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arrayGet
public java.lang.invoke.MethodHandle arrayGet()
Apply the chain of transforms and bind them to an array element get. The signature at the endpoint must return the array element type and receive the array type and int index.- Returns:
- the full handle chain, bound to an array element get.
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branch
public java.lang.invoke.MethodHandle branch(java.lang.invoke.MethodHandle test, java.lang.invoke.MethodHandle truePath, java.lang.invoke.MethodHandle falsePath)
Apply the chain of transforms and bind them to a boolean branch as from java.lang.invoke.MethodHandles.guardWithTest. As with GWT, the current endpoint signature must match the given target and fallback signatures.- Parameters:
test
- the test handletruePath
- the target handlefalsePath
- the fallback handle- Returns:
- the full handle chain bound to a branch
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invoker
public java.lang.invoke.MethodHandle invoker()
Produce a MethodHandle that invokes its leading MethodHandle argument with the remaining arguments, returning the result.- Returns:
- a new handle that invokes its leading MethodHandle argument
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