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## org.apache.xalan.transformer
Class KeyTable

    java.lang.Object
      |
      +--org.apache.xalan.transformer.KeyTable

public class KeyTable
extends java.lang.Object

**For advanced use only** Table of element keys, keyed by document node. An instance of this class is keyed by a Document node that should be matched with the root of the current context.

Constructor Summary
`KeyTable(int doc, PrefixResolver nscontext, QName name, java.util.Vector keyDeclarations, XPathContext xctxt)` Build a keys table.

Method Summary
`int` | `getDocKey()` Get the document root matching this key.
`QName` | `getKeyTableName()` Get Key Name for this KeyTable
`XNodeSet` | `getNodeSetDTMByKey(QName name, XMLString ref)` Given a valid element key, return the corresponding node list.

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

Constructor Detail

### KeyTable

    public KeyTable(int doc,
                    PrefixResolver nscontext,
                    QName name,
                    java.util.Vector keyDeclarations,
                    XPathContext xctxt)
             throws TransformerException

  Build a keys table.
  Parameters:
    `doc` - The owner document key.
    `nscontext` - The stylesheet's namespace context.
    `name` - The key name
    `keyDeclarations` - The stylesheet's xsl:key declarations.
    `xmlLiaison` - The parser liaison for support of getNodeData(useNode).
  Throws:
    TransformerException -

Method Detail

### getDocKey

    public int getDocKey()

  Get the document root matching this key.
  Returns:
    the document root matching this key

### getNodeSetDTMByKey

    public XNodeSet getNodeSetDTMByKey(QName name,
                                       XMLString ref)

  Given a valid element key, return the corresponding node list.
  Parameters:
    `name` - The name of the key, which must match the 'name' attribute on xsl:key.
    `ref` - The value that must match the value found by the 'match' attribute on xsl:key.
  Returns:
    a set of nodes referenced by the key named `name` and the reference `ref`. If no node is referenced by this key, an empty node set is returned.

### getKeyTableName

    public QName getKeyTableName()

  Get Key Name for this KeyTable
  Returns:
    Key name

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Copyright © 2002 Apache XML Project. All Rights Reserved.