Package gnu.kawa.xml
Class NodeType
- java.lang.Object
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- gnu.bytecode.Type
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- gnu.bytecode.ObjectType
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- gnu.kawa.xml.NodeType
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- All Implemented Interfaces:
TypeValue
,ItemPredicate
,NodePredicate
,Externalizable
,Serializable
,Type
- Direct Known Subclasses:
AttributeType
,ElementType
,ProcessingInstructionType
public class NodeType extends ObjectType implements TypeValue, NodePredicate, Externalizable
A SeqPosition used to represent a node in (usually) a TreeList. This is special in that the represented node is the current position of the SeqPosition - but when passed to a method it is only valid during that method. After the method returns, the caller is free to change the position, so if the node is saved in a data structure it must be copied.- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class gnu.bytecode.Type
Type.NeverReturns
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Field Summary
Fields Modifier and Type Field Description static NodeType
anyNodeTest
static int
ATTRIBUTE_OK
static int
COMMENT_OK
static NodeType
commentNodeTest
static int
DOCUMENT_OK
static NodeType
documentNodeTest
static int
ELEMENT_OK
static NodeType
nodeType
static int
PI_OK
static int
TEXT_OK
static NodeType
textNodeTest
static ClassType
typeKNode
static ClassType
typeNodeType
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Fields inherited from class gnu.bytecode.ObjectType
flags
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Fields inherited from class gnu.bytecode.Type
boolean_ctype, boolean_type, booleanType, booleanValue_method, byte_type, byteType, char_type, charType, clone_method, double_type, doubleType, doubleValue_method, errorType, float_type, floatType, floatValue_method, int_type, intType, intValue_method, java_lang_Class_type, javalangannotationAnnotationType, javalangBooleanType, javalangCharacterType, javalangClassType, javalanginvokeMethodHandleType, javalangNumberType, javalangObjectType, javalangStringType, javalangThrowableType, long_type, longType, longValue_method, neverReturnsType, nullType, number_type, objectType, pointer_type, reflectClass, short_type, shortType, string_type, throwable_type, toString_method, tostring_type, toStringType, typeArray0, void_type, voidType
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static KNode
coerceForce(Object obj, int kinds)
Object
coerceFromObject(Object obj)
Convert an object to a value of this Type.static KNode
coerceOrNull(Object obj, int kinds)
int
compare(Type other)
Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common.Expression
convertValue(Expression value)
Return converted expression or null.void
emitCoerceFromObject(CodeAttr code)
Compile (in given method) cast from Object to this Type.protected void
emitCoerceOrNullMethod(Variable incoming, Compilation comp)
void
emitIsInstance(Variable incoming, Compilation comp, Target target)
Emit code for incoming instanceof this_type.void
emitTestIf(Variable incoming, Declaration decl, Compilation comp)
Emit code for if (incoming instanceof this_type) decl = incoming ....Procedure
getConstructor()
Get the constructor function for this type.Type
getImplementationType()
Return Java-level implementation type.static boolean
isInstance(AbstractSequence seq, int ipos, int kinds)
boolean
isInstance(Object obj)
boolean
isInstancePos(AbstractSequence seq, int ipos)
void
readExternal(ObjectInput in)
String
toString()
void
writeExternal(ObjectOutput out)
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Methods inherited from class gnu.bytecode.ObjectType
getContextClass, getContextClassLoader, getField, getInterfaces, getInternalName, getMethod, getMethods, getMethods, getReflectClass, getSuperclass, isExisting, setExisting
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Methods inherited from class gnu.bytecode.Type
coerceToObject, emitCoerceToObject, emitConvertFromPrimitive, emitIsInstance, getGenericSignature, getMaybeGenericSignature, getName, getRawType, getRealType, getSignature, getSize, getSizeInWords, getType, hashCode, isCompatibleWithValue, isCompatibleWithValue, isInterface, isMoreSpecific, isSame, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSharedType, lowestCommonSuperType, make, make, printSignature, promote, promoteIfUnsigned, registerTypeForClass, setGenericSignature, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.lang.reflect.Type
getTypeName
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Methods inherited from interface gnu.expr.TypeValue
encodeType
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Field Detail
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TEXT_OK
public static final int TEXT_OK
- See Also:
- Constant Field Values
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ELEMENT_OK
public static final int ELEMENT_OK
- See Also:
- Constant Field Values
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ATTRIBUTE_OK
public static final int ATTRIBUTE_OK
- See Also:
- Constant Field Values
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DOCUMENT_OK
public static final int DOCUMENT_OK
- See Also:
- Constant Field Values
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COMMENT_OK
public static final int COMMENT_OK
- See Also:
- Constant Field Values
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PI_OK
public static final int PI_OK
- See Also:
- Constant Field Values
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typeKNode
public static final ClassType typeKNode
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typeNodeType
public static final ClassType typeNodeType
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nodeType
public static final NodeType nodeType
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documentNodeTest
public static final NodeType documentNodeTest
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textNodeTest
public static final NodeType textNodeTest
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commentNodeTest
public static final NodeType commentNodeTest
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anyNodeTest
public static final NodeType anyNodeTest
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Method Detail
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emitCoerceFromObject
public void emitCoerceFromObject(CodeAttr code)
Description copied from class:ObjectType
Compile (in given method) cast from Object to this Type.- Overrides:
emitCoerceFromObject
in classObjectType
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convertValue
public Expression convertValue(Expression value)
Description copied from interface:TypeValue
Return converted expression or null.- Specified by:
convertValue
in interfaceTypeValue
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coerceFromObject
public Object coerceFromObject(Object obj)
Description copied from class:Type
Convert an object to a value of this Type. The result is actually of the implementation type, boxed as appropriate, so it is suitable for standard reflective operations, like the arguments to Field#set or Method#invoke. Throw a ClassCastException when this is not possible.- Overrides:
coerceFromObject
in classObjectType
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getImplementationType
public Type getImplementationType()
Description copied from class:Type
Return Java-level implementation type. The type used to implement types not natively understood by the JVM or the Java language. Usually, the identity function. However, a language might handle union types or template types or type expressions calculated at run time. In that case return the type used at the Java level, and known at compile time.- Specified by:
getImplementationType
in interfaceTypeValue
- Overrides:
getImplementationType
in classType
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compare
public int compare(Type other)
Description copied from class:Type
Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common. "Same values" is rather loose; by "A is a subtype of B" we mean that all instance of A can be "widened" to B. More formally, A.compare(B) returns: 1: all B values can be converted to A without a coercion failure (i.e. a ClassCastException or overflow or major loss of information), but not vice versa. 0: all A values can be converted to B without a coercion failure and vice versa; -1: all A values can be converted to B without a coercion failure but not vice versa; -2: there are (potentially) some A values that can be converted to B, and some B values can be converted to A; -3: there are no A values that can be converted to B, and neither are there any B values that can be converted to A.- Overrides:
compare
in classObjectType
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isInstance
public boolean isInstance(Object obj)
- Overrides:
isInstance
in classObjectType
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isInstancePos
public boolean isInstancePos(AbstractSequence seq, int ipos)
- Specified by:
isInstancePos
in interfaceItemPredicate
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isInstance
public static boolean isInstance(AbstractSequence seq, int ipos, int kinds)
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emitCoerceOrNullMethod
protected void emitCoerceOrNullMethod(Variable incoming, Compilation comp)
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emitTestIf
public void emitTestIf(Variable incoming, Declaration decl, Compilation comp)
Description copied from interface:TypeValue
Emit code for if (incoming instanceof this_type) decl = incoming .... This method is designed for typeswitch applications, where this call is the first part of a conditional, so it must be followed by calls to emitElse and emitFi.- Specified by:
emitTestIf
in interfaceTypeValue
- Parameters:
incoming
- Contains the value we are testing to see if it has the type of this. If null, use top-of-stack. May not be null if decl is non-null.decl
- If non-null, assign value after coercion to Declaration.comp
- The compilation state.
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emitIsInstance
public void emitIsInstance(Variable incoming, Compilation comp, Target target)
Description copied from interface:TypeValue
Emit code for incoming instanceof this_type. The implementation can useInstanceOf .emitIsInstance
which is a conveniece method that callsemitTestIf
.- Specified by:
emitIsInstance
in interfaceTypeValue
- Parameters:
incoming
- Contains the value we are testing to see if it has the the type of 'this'. If null, use top-of-stack.comp
- The compilation state.target
- Where to leave the result.
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getConstructor
public Procedure getConstructor()
Description copied from interface:TypeValue
Get the constructor function for this type. Returns null if there is no contructor function. Also returns null if this extends ClassType or ArrayType and standard Java constructors (<init>
methods) should be used.- Specified by:
getConstructor
in interfaceTypeValue
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writeExternal
public void writeExternal(ObjectOutput out) throws IOException
- Specified by:
writeExternal
in interfaceExternalizable
- Throws:
IOException
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readExternal
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
- Specified by:
readExternal
in interfaceExternalizable
- Throws:
IOException
ClassNotFoundException
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