Package org.apache.xpath.patterns
Class UnionPattern
- java.lang.Object
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- org.apache.xpath.Expression
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- org.apache.xpath.patterns.UnionPattern
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- All Implemented Interfaces:
java.io.Serializable
,javax.xml.transform.SourceLocator
,ExpressionNode
,XPathVisitable
public class UnionPattern extends Expression
This class represents a union pattern, which can have multiple individual StepPattern patterns.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description UnionPattern()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
callVisitors(ExpressionOwner owner, XPathVisitor visitor)
This will traverse the heararchy, 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)
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
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Method Detail
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fixupVariables
public void fixupVariables(java.util.Vector vars, int globalsSize)
No arguments to process, so this does nothing.- Specified by:
fixupVariables
in classExpression
- Parameters:
vars
- List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame). NEEDSDOC @param globalsSize
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canTraverseOutsideSubtree
public boolean canTraverseOutsideSubtree()
Tell if this expression or it's subexpressions can traverse outside the current subtree.- Overrides:
canTraverseOutsideSubtree
in classExpression
- Returns:
- true if traversal outside the context node's subtree can occur.
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setPatterns
public void setPatterns(StepPattern[] patterns)
Set the contained step patterns to be tested.- Parameters:
patterns
- the contained step patterns to be tested.
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getPatterns
public StepPattern[] getPatterns()
Get the contained step patterns to be tested.- Returns:
- an array of the contained step patterns to be tested.
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execute
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
Test a node to see if it matches any of the patterns in the union.- Specified by:
execute
in classExpression
- Parameters:
xctxt
- XPath runtime context.- Returns:
NodeTest.SCORE_NODETEST
,NodeTest.SCORE_NONE
,NodeTest.SCORE_NSWILD
,NodeTest.SCORE_QNAME
, orNodeTest.SCORE_OTHER
.- Throws:
javax.xml.transform.TransformerException
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callVisitors
public void callVisitors(ExpressionOwner owner, XPathVisitor visitor)
Description copied from interface:XPathVisitable
This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.- Parameters:
owner
- The owner of the visitor, where that path may be rewritten if needed.visitor
- The visitor whose appropriate method will be called.- See Also:
XPathVisitable.callVisitors(ExpressionOwner, XPathVisitor)
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deepEquals
public boolean deepEquals(Expression expr)
Description copied from class:Expression
Compare this object with another object and see if they are equal, include the sub heararchy.- Specified by:
deepEquals
in classExpression
- 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.
- See Also:
Expression.deepEquals(Expression)
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