Package gnu.kawa.xml

Class TreeScanner

java.lang.Object

gnu.mapping.PropertySet

gnu.mapping.Procedure

gnu.mapping.ProcedureN

gnu.mapping.MethodProc

gnu.kawa.xml.TreeScanner

All Implemented Interfaces:

Named, Externalizable, Serializable

Direct Known Subclasses:

AncestorAxis, AncestorOrSelfAxis, AttributeAxis, ChildAxis, DescendantAxis, DescendantOrSelfAxis, FollowingAxis, FollowingSiblingAxis, ParentAxis, PrecedingAxis, PrecedingSiblingAxis, SelfAxis

public abstract class TreeScanner
extends MethodProc
implements Externalizable

Abstract class that scans part of a node tree. Takes a node argument, and writes matching "relative" nodes out to a PositionConsumer as a sequence of position pairs. This is uses to implement "path expressions" as in XPath/XSLT/XQuery. For example, the ChildAxis sub-class writes out all child nodes of the argument that match the 'type' NodePredicate.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static MethodHandle	applyToConsumerTS
NodePredicate	type

Fields inherited from class gnu.mapping.MethodProc

applyToConsumerDefaultMP, argTypes, NO_MATCH, NO_MATCH_AMBIGUOUS, NO_MATCH_BAD_TYPE, NO_MATCH_GUARD_FALSE, NO_MATCH_TOO_FEW_ARGS, NO_MATCH_TOO_MANY_ARGS, NO_MATCH_UNUSED_KEYWORD, THROW_ON_EXCEPTION

Fields inherited from class gnu.mapping.ProcedureN

applyToObject, noArgs

Fields inherited from class gnu.mapping.Procedure

applyMethodType, applyToConsumerDefault, applyToConsumerMethod, applyToObjectDefault, applyToObjectMethod, compilerKey, compilerXKey, inlineIfConstantSymbol, validateApplyKey, validateXApplyKey

Fields inherited from class gnu.mapping.PropertySet

nameKey

Method Summary

Modifier and Type	Method	Description
static Object	applyToConsumerTS(Procedure proc, CallContext ctx)
String	getDesc()
NodePredicate	getNodePredicate()
int	numArgs()	Return minArgs()|(maxArgs<<12).
void	readExternal(ObjectInput in)
abstract void	scan(AbstractSequence seq, int ipos, PositionConsumer out)
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class gnu.mapping.MethodProc

applyToConsumerDefaultMP, getParameterType, isApplicable, matchFailAsException, mostSpecific, numParameters, overrideEquivalent, resolveParameterTypes

Methods inherited from class gnu.mapping.ProcedureN

applyToObject

Methods inherited from class gnu.mapping.Procedure

apply0, apply1, apply2, apply3, apply4, applyL, applyN, applyToConsumerDefault, applyToObjectDefault, checkArgCount, checkBadCode, getApplyMethod, getApplyToConsumerMethod, getApplyToObjectMethod, getReturnType, getSetter, getSourceLocation, isSideEffectFree, lookupApplyHandle, maxArgs, maxArgs, minArgs, minArgs, set0, set1, setN, setSetter, setSourceLocation

Methods inherited from class gnu.mapping.PropertySet

getName, getProperty, getSymbol, removeProperty, setName, setProperty, setProperty, setSymbol

Methods inherited from class java.lang.Object

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

Field Detail

applyToConsumerTS

public static final MethodHandle applyToConsumerTS

type

public NodePredicate type

Method Detail

getNodePredicate

public NodePredicate getNodePredicate()

scan

public abstract void scan(AbstractSequence seq,
                          int ipos,
                          PositionConsumer out)

numArgs

public int numArgs()

Description copied from class: Procedure

Return minArgs()|(maxArgs<<12). We use a single virtual function to reduce the number of methods in the system, as well as the number of virtual method table entries. We shift by 12 so the number can normally be represented using a sipush instruction, without requiring a constant pool entry.

Overrides:

numArgs in class Procedure

applyToConsumerTS

public static Object applyToConsumerTS(Procedure proc,
                                       CallContext ctx)
                                throws Throwable

Throws:

Throwable

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

getDesc

public String getDesc()

toString

public String toString()

Overrides:

toString in class Procedure