org.apache.xpath.patterns
Class UnionPattern

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.patterns.UnionPattern

public class UnionPattern

extends Expression

This class represents a union pattern, which can have multiple individual StepPattern patterns.

See Also:

Serialized Form

Usage:

**For advanced use only**

Constructor Summary

UnionPattern()

Method Summary

void	callVisitors(ExpressionOwner owner, XPathVisitor visitor)
boolean	canTraverseOutsideSubtree() Tell if this expression or it's subexpressions can traverse outside the current subtree.
boolean	deepEquals(Expression expr)
XObject	execute(XPathContext xctxt) Test a node to see if it matches any of the patterns in the union.
void	fixupVariables(java.util.Vector vars, int globalsSize) No arguments to process, so this does nothing.
StepPattern[]	getPatterns() Get the contained step patterns to be tested.
void	setPatterns(StepPattern[] patterns) Set the contained step patterns to be tested.

Methods inherited from class org.apache.xpath.Expression

asIterator, asIteratorRaw, asNode, assertion, bool, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UnionPattern

public UnionPattern()

Method Detail

fixupVariables

public void fixupVariables(java.util.Vector vars,
                           int globalsSize)

No arguments to process, so this does nothing.

Overrides:

fixupVariables in class Expression

canTraverseOutsideSubtree

public boolean canTraverseOutsideSubtree()

Tell if this expression or it's subexpressions can traverse outside the current subtree.

Returns:

true if traversal outside the context node's subtree can occur.

Overrides:

canTraverseOutsideSubtree in class Expression

setPatterns

public void setPatterns(StepPattern[] patterns)

Set the contained step patterns to be tested.

Parameters:

patterns - the contained step patterns to be tested.

getPatterns

public StepPattern[] getPatterns()

Get the contained step patterns to be tested.

Returns:

an array of the contained step patterns to be tested.

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException

Test a node to see if it matches any of the patterns in the union.

Parameters:

xctxt - XPath runtime context.

Returns:

NodeTest.SCORE_NODETEST, NodeTest.SCORE_NONE, NodeTest.SCORE_NSWILD, NodeTest.SCORE_QNAME, or NodeTest.SCORE_OTHER.

Throws:

TransformerException -

Overrides:

execute in class Expression

callVisitors

public void callVisitors(ExpressionOwner owner,
                         XPathVisitor visitor)

See Also:

XPathVisitable.callVisitors(ExpressionOwner, XPathVisitor)

deepEquals

public boolean deepEquals(Expression expr)

Overrides:

deepEquals in class Expression

See Also:

Expression.deepEquals(Expression)