Package org.loboevolution.apache.xpath.patterns

Class UnionPattern

java.lang.Object

org.loboevolution.apache.xpath.Expression

org.loboevolution.apache.xpath.patterns.UnionPattern

All Implemented Interfaces:

SourceLocator, ExpressionNode, XPathVisitable

public class UnionPattern
extends Expression

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

Constructor Summary

Constructors

Constructor	Description
UnionPattern()

Method Summary

Modifier and Type	Method	Description
void	callVisitors(XPathVisitor visitor)	This will traverse the hierarchy, calling the visitor for each member.
boolean	canTraverseOutsideSubtree()	Tell if this expression or it's subexpressions can traverse outside the current subtree.
boolean	deepEquals(Expression expr)	Compare this object with another object and see if they are equal, include the sub heararchy.
XObject	execute(XPathContext xctxt)	Execute an expression in the XPath runtime context, and return the result of the expression.
void	setPatterns(StepPattern[] patterns)	Set the contained step patterns to be tested.

Methods inherited from class org.loboevolution.apache.xpath.Expression

asIterator, asNode, assertion, bool, error, execute, execute, execute, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isSameClass, isStableNumber, num

Methods inherited from class java.lang.Object

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

Constructor Details

UnionPattern

public UnionPattern()

Method Details

canTraverseOutsideSubtree

public boolean canTraverseOutsideSubtree()

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

Overrides:

canTraverseOutsideSubtree in class Expression

Returns:

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

setPatterns

public void setPatterns(StepPattern[] patterns)

Set the contained step patterns to be tested.

Parameters:

patterns - the contained step patterns to be tested.

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException

Execute an expression in the XPath runtime context, and return the result of the expression.

Specified by:

execute in class Expression

Parameters:

xctxt - The XPath runtime context.

Returns:

The result of the expression in the form of a XObject.

Throws:

TransformerException - if a runtime exception occurs.

callVisitors

public void callVisitors(XPathVisitor visitor)

This will traverse the hierarchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.

Parameters:

visitor - The visitor whose appropriate method will be called.

deepEquals

public boolean deepEquals(Expression expr)

Compare this object with another object and see if they are equal, include the sub heararchy.

Specified by:

deepEquals in class Expression

Parameters:

expr - Another expression object.

Returns:

true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.