org.apache.xpath.patterns

## Class FunctionPattern

- java.lang.Object
- - org.apache.xpath.Expression
  - - org.apache.xpath.patterns.NodeTest
    - - org.apache.xpath.patterns.StepPattern
      - - org.apache.xpath.patterns.FunctionPattern

- All Implemented Interfaces:
    java.io.Serializable, SourceLocator, SubContextList, ExpressionNode, ExpressionOwner, XPathVisitable

      public class FunctionPattern
      extends StepPattern

  Match pattern step that contains a function.
  See Also:
    Serialized Form
  Usage:
    **For advanced use only**

- - ### Field Summary

    - ### Fields inherited from class org.apache.xpath.patterns.NodeTest

      `SCORE_NODETEST, SCORE_NONE, SCORE_NSWILD, SCORE_OTHER, SCORE_QNAME, SHOW_BYFUNCTION, SUPPORTS_PRE_STRIPPING, WILD`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `FunctionPattern(Expression expr, int axis, int predaxis)` Construct a FunctionPattern from a `expression`.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `calcScore()` Static calc of match score.
    `XObject` | `execute(XPathContext xctxt)` Test a node to see if it matches the given node test.
    `XObject` | `execute(XPathContext xctxt, int context)` Test a node to see if it matches the given node test.
    `XObject` | `execute(XPathContext xctxt, int context, DTM dtm, int expType)` Test a node to see if it matches the given node test.
    `void` | `fixupVariables(java.util.Vector vars, int globalsSize)` This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.

    - ### Methods inherited from class org.apache.xpath.patterns.StepPattern

      `calcTargetString, callVisitors, canTraverseOutsideSubtree, deepEquals, getAxis, getExpression, getLastPos, getMatchScore, getPredicate, getPredicateCount, getPredicates, getProximityPosition, getRelativePathPattern, getTargetString, setAxis, setExpression, setPredicates, setRelativePathPattern, toString`

    - ### Methods inherited from class org.apache.xpath.patterns.NodeTest

      `debugWhatToShow, getDefaultScore, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, getWhatToShow, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShow`

    - ### Methods inherited from class org.apache.xpath.Expression

      `asIterator, asIteratorRaw, asNode, assertion, bool, error, 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, wait, wait, wait`

- - ### Constructor Detail

    - #### FunctionPattern

          public FunctionPattern(Expression expr,
                         int axis,
                         int predaxis)

      Construct a FunctionPattern from a `expression`. NEEDSDOC @param expr

  - ### Method Detail

    - #### calcScore

          public final void calcScore()

      Static calc of match score.
      Overrides:
        `calcScore` in class `StepPattern`

    - #### fixupVariables

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

      This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
      Overrides:
        `fixupVariables` in class `StepPattern`
      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).
        `globalsSize` - The number of variables in the global variable area.

    - #### execute

          public XObject execute(XPathContext xctxt,
                        int context)
                          throws TransformerException

      Test a node to see if it matches the given node test.
      Overrides:
        `execute` in class `StepPattern`
      Parameters:
        `xctxt` - XPath runtime context.
        `context` - The current node context.
      Returns:
        `NodeTest.SCORE_NODETEST`, `NodeTest.SCORE_NONE`, `NodeTest.SCORE_NSWILD`, `NodeTest.SCORE_QNAME`, or `NodeTest.SCORE_OTHER`.
      Throws:
        `TransformerException`

    - #### execute

          public XObject execute(XPathContext xctxt,
                        int context,
                        DTM dtm,
                        int expType)
                          throws TransformerException

      Test a node to see if it matches the given node test.
      Overrides:
        `execute` in class `StepPattern`
      Parameters:
        `xctxt` - XPath runtime context.
        `context` - The currentNode.
        `dtm` - The DTM of the current node.
        `expType` - The expanded type ID of the current node.
      Returns:
        `NodeTest.SCORE_NODETEST`, `NodeTest.SCORE_NONE`, `NodeTest.SCORE_NSWILD`, `NodeTest.SCORE_QNAME`, or `NodeTest.SCORE_OTHER`.
      Throws:
        `TransformerException`

    - #### execute

          public XObject execute(XPathContext xctxt)
                          throws TransformerException

      Test a node to see if it matches the given node test.
      Overrides:
        `execute` in class `StepPattern`
      Parameters:
        `xctxt` - XPath runtime context.
      Returns:
        `NodeTest.SCORE_NODETEST`, `NodeTest.SCORE_NONE`, `NodeTest.SCORE_NSWILD`, `NodeTest.SCORE_QNAME`, or `NodeTest.SCORE_OTHER`.
      Throws:
        `TransformerException`

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