gnu.kawa.xml
Class NodeType

java.lang.Object
  gnu.bytecode.Type
      gnu.bytecode.ObjectType
          gnu.kawa.xml.NodeType

All Implemented Interfaces:

TypeValue, ItemPredicate, NodePredicate, java.io.Externalizable, java.io.Serializable

Direct Known Subclasses:

AttributeType, ElementType, ProcessingInstructionType

public class NodeType
extends ObjectType
implements TypeValue, NodePredicate, java.io.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

Field Summary

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

Fields inherited from class gnu.bytecode.ObjectType

flags

Fields inherited from class gnu.bytecode.Type

boolean_ctype, boolean_type, booleanValue_method, byte_type, char_type, clone_method, double_type, doubleValue_method, float_type, floatValue_method, int_type, intValue_method, java_lang_Class_type, long_type, longValue_method, neverReturnsType, nullType, number_type, pointer_type, reflectClass, short_type, string_type, throwable_type, toString_method, tostring_type, typeArray0, void_type

Constructor Summary

NodeType(java.lang.String name)

NodeType(java.lang.String name, int kinds)

Method Summary

static KNode	coerceForce(java.lang.Object obj, int kinds)
java.lang.Object	coerceFromObject(java.lang.Object obj) Convert an object to a value of this Type.
static KNode	coerceOrNull(java.lang.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.
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() The type used to implement types not natively understood by the JVM.
static boolean	isInstance(AbstractSequence seq, int ipos, int kinds)
boolean	isInstance(java.lang.Object obj)
boolean	isInstancePos(AbstractSequence seq, int ipos)
void	readExternal(java.io.ObjectInput in)
java.lang.String	toString()
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class gnu.bytecode.ObjectType

getInternalName, getMethods, getReflectClass, isExisting, promote, setExisting

Methods inherited from class gnu.bytecode.Type

coerceToObject, emitCoerceToObject, emitIsInstance, getName, getSignature, getSize, getSizeInWords, getType, hashCode, isMoreSpecific, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSuperType, make, registerTypeForClass, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TEXT_OK

public static final int TEXT_OK

See Also:

Constant Field Values

ELEMENT_OK

public static final int ELEMENT_OK

See Also:

Constant Field Values

ATTRIBUTE_OK

public static final int ATTRIBUTE_OK

See Also:

Constant Field Values

DOCUMENT_OK

public static final int DOCUMENT_OK

See Also:

Constant Field Values

COMMENT_OK

public static final int COMMENT_OK

See Also:

Constant Field Values

PI_OK

public static final int PI_OK

See Also:

Constant Field Values

typeKNode

public static final ClassType typeKNode

typeNodeType

public static final ClassType typeNodeType

nodeType

public static final NodeType nodeType

documentNodeTest

public static final NodeType documentNodeTest

textNodeTest

public static final NodeType textNodeTest

commentNodeTest

public static final NodeType commentNodeTest

anyNodeTest

public static final NodeType anyNodeTest

Constructor Detail

NodeType

public NodeType(java.lang.String name,
                int kinds)

NodeType

public NodeType(java.lang.String name)

Method Detail

emitCoerceFromObject

public void emitCoerceFromObject(CodeAttr code)

Description copied from class: ObjectType

Compile (in given method) cast from Object to this Type.

Overrides:

emitCoerceFromObject in class ObjectType

coerceFromObject

public java.lang.Object coerceFromObject(java.lang.Object obj)

Description copied from class: ObjectType

Convert an object to a value of this Type. Throw a ClassCastException when this is not possible.

Overrides:

coerceFromObject in class ObjectType

getImplementationType

public Type getImplementationType()

Description copied from class: Type

The type used to implement types not natively understood by the JVM. 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 JVM level, and known at compile time.

Specified by:

getImplementationType in interface TypeValue

Overrides:

getImplementationType in class ObjectType

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 member" 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 not 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 class ObjectType

isInstance

public boolean isInstance(java.lang.Object obj)

Overrides:

isInstance in class ObjectType

isInstancePos

public boolean isInstancePos(AbstractSequence seq,
                             int ipos)

Specified by:

isInstancePos in interface ItemPredicate

isInstance

public static boolean isInstance(AbstractSequence seq,
                                 int ipos,
                                 int kinds)

coerceForce

public static KNode coerceForce(java.lang.Object obj,
                                int kinds)

coerceOrNull

public static KNode coerceOrNull(java.lang.Object obj,
                                 int kinds)

emitCoerceOrNullMethod

protected void emitCoerceOrNullMethod(Variable incoming,
                                      Compilation comp)

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 interface TypeValue

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 incoming is non-null.

decl - If non-null, assign value after coercion to Declaration.

comp - The compilation state.

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 use InstanceOf .emitIsInstance which is a conveniece method that calls emitTestIf.

Specified by:

emitIsInstance in interface TypeValue

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.

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 ( methods) should be used.

Specified by:

getConstructor in interface TypeValue

toString

public java.lang.String toString()

Overrides:

toString in class Type

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException

java.lang.ClassNotFoundException