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## org.apache.xalan.transformer
Class KeyIterator

    java.lang.Object
      org.apache.xpath.Expression
          org.apache.xpath.patterns.NodeTest
              org.apache.xpath.axes.PredicatedNodeTest
                  org.apache.xpath.axes.LocPathIterator
                      org.apache.xpath.axes.BasicTestIterator
                          org.apache.xpath.axes.ChildTestIterator
                              org.apache.xpath.axes.OneStepIteratorForward
                                  org.apache.xalan.transformer.KeyIterator

All Implemented Interfaces:
  java.lang.Cloneable, DTMIterator, ExpressionNode, PathComponent, java.io.Serializable, SourceLocator, SubContextList, XPathVisitable

public class KeyIterator
extends OneStepIteratorForward

This class implements an optimized iterator for "key()" patterns, matching each node to the match attribute in one or more xsl:key declarations.

See Also:
  Serialized Form
Usage:
  **For internal use only**

Field Summary

Fields inherited from class org.apache.xpath.axes.LocPathIterator
`m_lastFetched`

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`

Fields inherited from interface org.apache.xml.dtm.DTMIterator
`FILTER_ACCEPT, FILTER_REJECT, FILTER_SKIP`

Method Summary
`short` | `acceptNode(int testNode)` Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator.
`java.util.Vector` | `getKeyDeclarations()` Get the key declarations from the stylesheet
`QName` | `getName()` Get the key name from a key declaration this iterator will process

Methods inherited from class org.apache.xpath.axes.OneStepIteratorForward
`deepEquals, getAxis, setRoot`

Methods inherited from class org.apache.xpath.axes.ChildTestIterator
`cloneWithReset, detach`

Methods inherited from class org.apache.xpath.axes.BasicTestIterator
`nextNode`

Methods inherited from class org.apache.xpath.axes.LocPathIterator
`allowDetachToRelease, asIterator, asNode, bool, callVisitors, execute, executeCharsToContentHandler, getAnalysisBits, getContext, getCurrentContextNode, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getFilter, getFoundLast, getIsTopLevel, getLastPos, getLength, getPrefixResolver, getRoot, getWhatToShow, getXPathContext, incrementCurrentPos, isDocOrdered, isFresh, isMutable, isNodesetExpr, item, previousNode, reset, runTo, setCurrentContextNode, setCurrentPos, setEnvironment, setIsTopLevel, setItem, setShouldCacheNodes, size`

Methods inherited from class org.apache.xpath.axes.PredicatedNodeTest
`callPredicateVisitors, canTraverseOutsideSubtree, clone, fixupVariables, getLocPathIterator, getPredicate, getPredicateCount, getPredicateIndex, getProximityPosition, getProximityPosition, initProximityPosition, isReverseAxes, resetProximityPositions, setLocPathIterator, setPredicateCount`

Methods inherited from class org.apache.xpath.patterns.NodeTest
`debugWhatToShow, execute, execute, getDefaultScore, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShow`

Methods inherited from class org.apache.xpath.Expression
`asIteratorRaw, assertion, error, execute, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isStableNumber, num, warn, xstr`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.apache.xml.dtm.DTMIterator
`clone`

Method Detail

### getName

    public QName getName()

  Get the key name from a key declaration this iterator will process

  Returns:
    Key name

### getKeyDeclarations

    public java.util.Vector getKeyDeclarations()

  Get the key declarations from the stylesheet

  Returns:
    Vector containing the key declarations from the stylesheet

### acceptNode

    public short acceptNode(int testNode)

  Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator. This function will be called by the implementation of TreeWalker and NodeIterator; it is not intended to be called directly from user code.

  Overrides:
    `acceptNode` in class `PredicatedNodeTest`
  Parameters:
    `testNode` - The node to check to see if it passes the filter or not.
  Returns:
    a constant to determine whether the node is accepted, rejected, or skipped, as defined above .

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Copyright © 2004 Apache XML Project. All Rights Reserved.