Class NativeJavaObject
- java.lang.Object
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- org.htmlunit.corejs.javascript.NativeJavaObject
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- All Implemented Interfaces:
java.io.Serializable
,Scriptable
,SymbolScriptable
,Wrapper
- Direct Known Subclasses:
NativeJavaArray
,NativeJavaClass
,NativeJavaList
,NativeJavaMap
public class NativeJavaObject extends java.lang.Object implements Scriptable, SymbolScriptable, Wrapper, java.io.Serializable
This class reflects non-Array Java objects into the JavaScript environment. It reflect fields directly, and uses NativeJavaMethod objects to reflect (possibly overloaded) methods. It also provides iterator support for all iterable objects.- See Also:
NativeJavaArray
,NativeJavaPackage
,NativeJavaClass
, Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
NativeJavaObject.JavaIterableIterator
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Field Summary
Fields Modifier and Type Field Description private static java.lang.reflect.Method
adapter_readAdapterObject
private static java.lang.reflect.Method
adapter_writeAdapterObject
private static java.lang.Object
COERCED_INTERFACE_KEY
(package private) static byte
CONVERSION_NONE
(package private) static byte
CONVERSION_NONTRIVIAL
(package private) static byte
CONVERSION_TRIVIAL
private java.util.Map<java.lang.String,FieldAndMethods>
fieldAndMethods
protected boolean
isAdapter
protected java.lang.Object
javaObject
private static int
JSTYPE_BIGINT
private static int
JSTYPE_BOOLEAN
private static int
JSTYPE_JAVA_ARRAY
private static int
JSTYPE_JAVA_CLASS
private static int
JSTYPE_JAVA_OBJECT
private static int
JSTYPE_NULL
private static int
JSTYPE_NUMBER
private static int
JSTYPE_OBJECT
private static int
JSTYPE_STRING
private static int
JSTYPE_UNDEFINED
protected JavaMembers
members
protected Scriptable
parent
The parent scope of this object.protected Scriptable
prototype
The prototype of this object.private static long
serialVersionUID
protected java.lang.Class<?>
staticType
private static Callable
symbol_iterator
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Fields inherited from interface org.htmlunit.corejs.javascript.Scriptable
NOT_FOUND
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Constructor Summary
Constructors Constructor Description NativeJavaObject()
NativeJavaObject(Scriptable scope, java.lang.Object javaObject, java.lang.Class<?> staticType)
NativeJavaObject(Scriptable scope, java.lang.Object javaObject, java.lang.Class<?> staticType, boolean isAdapter)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description static boolean
canConvert(java.lang.Object fromObj, java.lang.Class<?> to)
Determine whether we can/should convert between the given type and the desired one.private static java.lang.Object
coerceToNumber(java.lang.Class<?> type, java.lang.Object value)
static java.lang.Object
coerceType(java.lang.Class<?> type, java.lang.Object value)
Deprecated.as of 1.5 Release 4(package private) static java.lang.Object
coerceTypeImpl(java.lang.Class<?> type, java.lang.Object value)
Type-munging for field setting and method invocation.protected static java.lang.Object
createInterfaceAdapter(java.lang.Class<?> type, ScriptableObject so)
void
delete(int index)
Removes a property from this object.void
delete(java.lang.String name)
Removes a property from this object.void
delete(Symbol key)
Delete a property with the specified key.boolean
equals(java.lang.Object obj)
java.lang.Object
get(int index, Scriptable start)
Get a property from the object selected by an integral index.java.lang.Object
get(java.lang.String name, Scriptable start)
Get a named property from the object.java.lang.Object
get(Symbol key, Scriptable start)
Return the value of the property with the specified key, or NOT_FOUND.java.lang.String
getClassName()
Get the name of the set of objects implemented by this Java class.(package private) static int
getConversionWeight(java.lang.Object fromObj, java.lang.Class<?> to)
Derive a ranking based on how "natural" the conversion is.java.lang.Object
getDefaultValue(java.lang.Class<?> hint)
Get the default value of the object with a given hint.java.lang.Object[]
getIds()
Get an array of property ids.private static int
getJSTypeCode(java.lang.Object value)
Scriptable
getParentScope()
Returns the parent (enclosing) scope of the object.Scriptable
getPrototype()
Get the prototype of the object.(package private) static int
getSizeRank(java.lang.Class<?> aType)
boolean
has(int index, Scriptable start)
Indicates whether or not an indexed property is defined in an object.boolean
has(java.lang.String name, Scriptable start)
Indicates whether or not a named property is defined in an object.boolean
has(Symbol key, Scriptable start)
Return true if the specified property exists.int
hashCode()
boolean
hasInstance(Scriptable value)
The instanceof operator.(package private) static void
init(ScriptableObject scope, boolean sealed)
protected void
initMembers()
void
put(int index, Scriptable start, java.lang.Object value)
Sets an indexed property in this object.void
put(java.lang.String name, Scriptable start, java.lang.Object value)
Sets a named property in this object.void
put(Symbol symbol, Scriptable start, java.lang.Object value)
Add a new property to to the object.private void
readObject(java.io.ObjectInputStream in)
(package private) static void
reportConversionError(java.lang.Object value, java.lang.Class<?> type)
void
setParentScope(Scriptable m)
Sets the parent (enclosing) scope of the object.void
setPrototype(Scriptable m)
Sets the prototype of the object.private static double
toDouble(java.lang.Object value)
private static long
toInteger(java.lang.Object value, java.lang.Class<?> type, double min, double max)
java.lang.Object
unwrap()
Unwrap the object by returning the wrapped value.static java.lang.Object
wrap(Scriptable scope, java.lang.Object obj, java.lang.Class<?> staticType)
Deprecated.UseContext.getWrapFactory()
together with callingWrapFactory.wrap(Context, Scriptable, Object, Class)
private void
writeObject(java.io.ObjectOutputStream out)
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Field Detail
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serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
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JSTYPE_UNDEFINED
private static final int JSTYPE_UNDEFINED
- See Also:
- Constant Field Values
-
JSTYPE_NULL
private static final int JSTYPE_NULL
- See Also:
- Constant Field Values
-
JSTYPE_BOOLEAN
private static final int JSTYPE_BOOLEAN
- See Also:
- Constant Field Values
-
JSTYPE_NUMBER
private static final int JSTYPE_NUMBER
- See Also:
- Constant Field Values
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JSTYPE_STRING
private static final int JSTYPE_STRING
- See Also:
- Constant Field Values
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JSTYPE_JAVA_CLASS
private static final int JSTYPE_JAVA_CLASS
- See Also:
- Constant Field Values
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JSTYPE_JAVA_OBJECT
private static final int JSTYPE_JAVA_OBJECT
- See Also:
- Constant Field Values
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JSTYPE_JAVA_ARRAY
private static final int JSTYPE_JAVA_ARRAY
- See Also:
- Constant Field Values
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JSTYPE_OBJECT
private static final int JSTYPE_OBJECT
- See Also:
- Constant Field Values
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JSTYPE_BIGINT
private static final int JSTYPE_BIGINT
- See Also:
- Constant Field Values
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CONVERSION_TRIVIAL
static final byte CONVERSION_TRIVIAL
- See Also:
- Constant Field Values
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CONVERSION_NONTRIVIAL
static final byte CONVERSION_NONTRIVIAL
- See Also:
- Constant Field Values
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CONVERSION_NONE
static final byte CONVERSION_NONE
- See Also:
- Constant Field Values
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symbol_iterator
private static Callable symbol_iterator
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prototype
protected Scriptable prototype
The prototype of this object.
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parent
protected Scriptable parent
The parent scope of this object.
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javaObject
protected transient java.lang.Object javaObject
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staticType
protected transient java.lang.Class<?> staticType
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members
protected transient JavaMembers members
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fieldAndMethods
private transient java.util.Map<java.lang.String,FieldAndMethods> fieldAndMethods
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isAdapter
protected transient boolean isAdapter
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COERCED_INTERFACE_KEY
private static final java.lang.Object COERCED_INTERFACE_KEY
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adapter_writeAdapterObject
private static java.lang.reflect.Method adapter_writeAdapterObject
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adapter_readAdapterObject
private static java.lang.reflect.Method adapter_readAdapterObject
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Constructor Detail
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NativeJavaObject
public NativeJavaObject()
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NativeJavaObject
public NativeJavaObject(Scriptable scope, java.lang.Object javaObject, java.lang.Class<?> staticType)
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NativeJavaObject
public NativeJavaObject(Scriptable scope, java.lang.Object javaObject, java.lang.Class<?> staticType, boolean isAdapter)
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Method Detail
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init
static void init(ScriptableObject scope, boolean sealed)
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initMembers
protected void initMembers()
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has
public boolean has(java.lang.String name, Scriptable start)
Description copied from interface:Scriptable
Indicates whether or not a named property is defined in an object.Does not traverse the prototype chain.
The property is specified by a String name as defined for the
get
method.- Specified by:
has
in interfaceScriptable
- Parameters:
name
- the name of the propertystart
- the object in which the lookup began- Returns:
- true if and only if the named property is found in the object
- See Also:
Scriptable.get(String, Scriptable)
,ScriptableObject.getProperty(Scriptable, String)
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has
public boolean has(int index, Scriptable start)
Description copied from interface:Scriptable
Indicates whether or not an indexed property is defined in an object.Does not traverse the prototype chain.
The property is specified by an integral index as defined for the
get
method.- Specified by:
has
in interfaceScriptable
- Parameters:
index
- the numeric index for the propertystart
- the object in which the lookup began- Returns:
- true if and only if the indexed property is found in the object
- See Also:
Scriptable.get(int, Scriptable)
,ScriptableObject.getProperty(Scriptable, int)
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has
public boolean has(Symbol key, Scriptable start)
Description copied from interface:SymbolScriptable
Return true if the specified property exists.- Specified by:
has
in interfaceSymbolScriptable
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get
public java.lang.Object get(java.lang.String name, Scriptable start)
Description copied from interface:Scriptable
Get a named property from the object.Looks property up in this object and returns the associated value if found. Returns NOT_FOUND if not found. Note that this method is not expected to traverse the prototype chain. This is different from the ECMA [[Get]] operation.
Depending on the property selector, the runtime will call this method or the form of
get
that takes an integer:JavaScript code Java code a.b a.get("b", a) a["foo"] a.get("foo", a) a[3] a.get(3, a) a["3"] a.get(3, a) a[3.0] a.get(3, a) a["3.0"] a.get("3.0", a) a[1.1] a.get("1.1", a) a[-4] a.get(-4, a) The values that may be returned are limited to the following:
- java.lang.Boolean objects
- java.lang.String objects
- java.lang.Number objects
- org.htmlunit.corejs.javascript.Scriptable objects
- null
- The value returned by Context.getUndefinedValue()
- NOT_FOUND
- Specified by:
get
in interfaceScriptable
- Parameters:
name
- the name of the propertystart
- the object in which the lookup began- Returns:
- the value of the property (may be null), or NOT_FOUND
- See Also:
Context.getUndefinedValue()
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get
public java.lang.Object get(Symbol key, Scriptable start)
Description copied from interface:SymbolScriptable
Return the value of the property with the specified key, or NOT_FOUND.- Specified by:
get
in interfaceSymbolScriptable
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get
public java.lang.Object get(int index, Scriptable start)
Description copied from interface:Scriptable
Get a property from the object selected by an integral index.Identical to
get(String, Scriptable)
except that an integral index is used to select the property.- Specified by:
get
in interfaceScriptable
- Parameters:
index
- the numeric index for the propertystart
- the object in which the lookup began- Returns:
- the value of the property (may be null), or NOT_FOUND
- See Also:
Scriptable.get(String,Scriptable)
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put
public void put(java.lang.String name, Scriptable start, java.lang.Object value)
Description copied from interface:Scriptable
Sets a named property in this object.The property is specified by a string name as defined for
get
.The possible values that may be passed in are as defined for
get
. A class that implements this method may choose to ignore calls to set certain properties, in which case those properties are effectively read-only.For properties defined in a prototype chain, use
putProperty
in ScriptableObject.Note that if a property a is defined in the prototype p of an object o, then evaluating
o.a = 23
will causeset
to be called on the prototype p with o as the start parameter. To preserve JavaScript semantics, it is the Scriptable object's responsibility to modify o.This design allows properties to be defined in prototypes and implemented in terms of getters and setters of Java values without consuming slots in each instance.
The values that may be set are limited to the following:
- java.lang.Boolean objects
- java.lang.String objects
- java.lang.Number objects
- org.htmlunit.corejs.javascript.Scriptable objects
- null
- The value returned by Context.getUndefinedValue()
Arbitrary Java objects may be wrapped in a Scriptable by first calling
Context.toObject
. This allows the property of a JavaScript object to contain an arbitrary Java object as a value.Note that
has
will be called by the runtime first beforeset
is called to determine in which object the property is defined. Note that this method is not expected to traverse the prototype chain, which is different from the ECMA [[Put]] operation.- Specified by:
put
in interfaceScriptable
- Parameters:
name
- the name of the propertystart
- the object whose property is being setvalue
- value to set the property to- See Also:
Scriptable.has(String, Scriptable)
,Scriptable.get(String, Scriptable)
,ScriptableObject.putProperty(Scriptable, String, Object)
,Context.toObject(Object, Scriptable)
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put
public void put(Symbol symbol, Scriptable start, java.lang.Object value)
Description copied from interface:SymbolScriptable
Add a new property to to the object.- Specified by:
put
in interfaceSymbolScriptable
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put
public void put(int index, Scriptable start, java.lang.Object value)
Description copied from interface:Scriptable
Sets an indexed property in this object.The property is specified by an integral index as defined for
get
.Identical to
put(String, Scriptable, Object)
except that an integral index is used to select the property.- Specified by:
put
in interfaceScriptable
- Parameters:
index
- the numeric index for the propertystart
- the object whose property is being setvalue
- value to set the property to- See Also:
Scriptable.has(int, Scriptable)
,Scriptable.get(int, Scriptable)
,ScriptableObject.putProperty(Scriptable, int, Object)
,Context.toObject(Object, Scriptable)
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hasInstance
public boolean hasInstance(Scriptable value)
Description copied from interface:Scriptable
The instanceof operator.The JavaScript code "lhs instanceof rhs" causes rhs.hasInstance(lhs) to be called.
The return value is implementation dependent so that embedded host objects can return an appropriate value. See the JS 1.3 language documentation for more detail.
This operator corresponds to the proposed EMCA [[HasInstance]] operator.
- Specified by:
hasInstance
in interfaceScriptable
- Parameters:
value
- The value that appeared on the LHS of the instanceof operator- Returns:
- an implementation dependent value
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delete
public void delete(java.lang.String name)
Description copied from interface:Scriptable
Removes a property from this object. This operation corresponds to the ECMA [[Delete]] except that the no result is returned. The runtime will guarantee that this method is called only if the property exists. After this method is called, the runtime will call Scriptable.has to see if the property has been removed in order to determine the boolean result of the delete operator as defined by ECMA 11.4.1.A property can be made permanent by ignoring calls to remove it.
The property is specified by a String name as defined for
get
.To delete properties defined in a prototype chain, see deleteProperty in ScriptableObject.
- Specified by:
delete
in interfaceScriptable
- Parameters:
name
- the identifier for the property- See Also:
Scriptable.get(String, Scriptable)
,ScriptableObject.deleteProperty(Scriptable, String)
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delete
public void delete(Symbol key)
Description copied from interface:SymbolScriptable
Delete a property with the specified key.- Specified by:
delete
in interfaceSymbolScriptable
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delete
public void delete(int index)
Description copied from interface:Scriptable
Removes a property from this object.The property is specified by an integral index as defined for
get
.To delete properties defined in a prototype chain, see deleteProperty in ScriptableObject.
Identical to
delete(String)
except that an integral index is used to select the property.- Specified by:
delete
in interfaceScriptable
- Parameters:
index
- the numeric index for the property- See Also:
Scriptable.get(int, Scriptable)
,ScriptableObject.deleteProperty(Scriptable, int)
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getPrototype
public Scriptable getPrototype()
Description copied from interface:Scriptable
Get the prototype of the object.- Specified by:
getPrototype
in interfaceScriptable
- Returns:
- the prototype
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setPrototype
public void setPrototype(Scriptable m)
Sets the prototype of the object.- Specified by:
setPrototype
in interfaceScriptable
- Parameters:
m
- the prototype to set
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getParentScope
public Scriptable getParentScope()
Returns the parent (enclosing) scope of the object.- Specified by:
getParentScope
in interfaceScriptable
- Returns:
- the parent scope
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setParentScope
public void setParentScope(Scriptable m)
Sets the parent (enclosing) scope of the object.- Specified by:
setParentScope
in interfaceScriptable
- Parameters:
m
- the parent scope to set
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getIds
public java.lang.Object[] getIds()
Description copied from interface:Scriptable
Get an array of property ids.Not all property ids need be returned. Those properties whose ids are not returned are considered non-enumerable.
- Specified by:
getIds
in interfaceScriptable
- Returns:
- an array of Objects. Each entry in the array is either a java.lang.String or a java.lang.Number
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wrap
@Deprecated public static java.lang.Object wrap(Scriptable scope, java.lang.Object obj, java.lang.Class<?> staticType)
Deprecated.UseContext.getWrapFactory()
together with callingWrapFactory.wrap(Context, Scriptable, Object, Class)
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unwrap
public java.lang.Object unwrap()
Description copied from interface:Wrapper
Unwrap the object by returning the wrapped value.
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getClassName
public java.lang.String getClassName()
Description copied from interface:Scriptable
Get the name of the set of objects implemented by this Java class. This corresponds to the [[Class]] operation in ECMA and is used by Object.prototype.toString() in ECMA.See ECMA 8.6.2 and 15.2.4.2.
- Specified by:
getClassName
in interfaceScriptable
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getDefaultValue
public java.lang.Object getDefaultValue(java.lang.Class<?> hint)
Description copied from interface:Scriptable
Get the default value of the object with a given hint. The hints are String.class for type String, Number.class for type Number, Scriptable.class for type Object, and Boolean.class for type Boolean.A
hint
of null means "no hint".See ECMA 8.6.2.6.
- Specified by:
getDefaultValue
in interfaceScriptable
- Parameters:
hint
- the type hint- Returns:
- the default value
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canConvert
public static boolean canConvert(java.lang.Object fromObj, java.lang.Class<?> to)
Determine whether we can/should convert between the given type and the desired one. This should be superceded by a conversion-cost calculation function, but for now I'll hide behind precedent.
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getConversionWeight
static int getConversionWeight(java.lang.Object fromObj, java.lang.Class<?> to)
Derive a ranking based on how "natural" the conversion is. The special value CONVERSION_NONE means no conversion is possible, and CONVERSION_NONTRIVIAL signals that more type conformance testing is required. Based on "preferred method conversions" from Live Connect 3
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getSizeRank
static int getSizeRank(java.lang.Class<?> aType)
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getJSTypeCode
private static int getJSTypeCode(java.lang.Object value)
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coerceType
@Deprecated public static java.lang.Object coerceType(java.lang.Class<?> type, java.lang.Object value)
Deprecated.as of 1.5 Release 4Not intended for public use. Callers should use the public API Context.toType.- See Also:
Context.jsToJava(Object, Class)
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coerceTypeImpl
static java.lang.Object coerceTypeImpl(java.lang.Class<?> type, java.lang.Object value)
Type-munging for field setting and method invocation. Conforms to LC3 specification
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createInterfaceAdapter
protected static java.lang.Object createInterfaceAdapter(java.lang.Class<?> type, ScriptableObject so)
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coerceToNumber
private static java.lang.Object coerceToNumber(java.lang.Class<?> type, java.lang.Object value)
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toDouble
private static double toDouble(java.lang.Object value)
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toInteger
private static long toInteger(java.lang.Object value, java.lang.Class<?> type, double min, double max)
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reportConversionError
static void reportConversionError(java.lang.Object value, java.lang.Class<?> type)
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writeObject
private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException
- Throws:
java.io.IOException
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readObject
private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, java.lang.ClassNotFoundException
- Throws:
java.io.IOException
java.lang.ClassNotFoundException
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equals
public boolean equals(java.lang.Object obj)
- Overrides:
equals
in classjava.lang.Object
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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