Xerces2 Implementation: Class XPathMatcher

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## org.apache.xerces.impl.xs.identity
Class XPathMatcher

    java.lang.Object
      |
      +--org.apache.xerces.impl.xs.identity.XPathMatcher

Direct Known Subclasses:
  Field.Matcher, Selector.Matcher

public class XPathMatcher
extends java.lang.Object

XPath matcher.

# INTERNAL:

  Usage of this class is not supported. It may be altered or removed at any time.

Version:
  $Id: XPathMatcher.java 572110 2007-09-02 19:04:44Z mrglavas $
Author:
  Andy Clark, IBM

Field Summary
`protected static boolean` | `DEBUG_ALL` Compile to true to debug everything.
`protected static boolean` | `DEBUG_ANY` Don't touch this value unless you add more debug constants.
`protected static boolean` | `DEBUG_MATCH` Compile to true to debug match.
`protected static boolean` | `DEBUG_METHODS` Compile to true to debug method callbacks.
`protected static boolean` | `DEBUG_METHODS2` Compile to true to debug important method callbacks.
`protected static boolean` | `DEBUG_METHODS3` Compile to true to debug the really important methods.
`protected static boolean` | `DEBUG_STACK` Compile to true to debug step index stack.
`protected java.lang.Object` | `fMatchedString` The matching string.
`protected static int` | `MATCHED`
`protected static int` | `MATCHED_ATTRIBUTE`
`protected static int` | `MATCHED_DESCENDANT`
`protected static int` | `MATCHED_DESCENDANT_PREVIOUS`

Constructor Summary
`XPathMatcher(XPath xpath)` Constructs an XPath matcher that implements a document fragment handler.

Method Summary
`void` | `endElement(org.apache.xerces.xni.QName element, org.apache.xerces.xs.XSTypeDefinition type, boolean nillable, java.lang.Object value, short valueType, org.apache.xerces.xs.ShortList itemValueType)`
`protected void` | `handleContent(org.apache.xerces.xs.XSTypeDefinition type, boolean nillable, java.lang.Object value, short valueType, org.apache.xerces.xs.ShortList itemValueType)`
`boolean` | `isMatched()` Returns value of first member of fMatched that is nonzero.
`protected void` | `matched(java.lang.Object actualValue, short valueType, org.apache.xerces.xs.ShortList itemValueType, boolean isNil)` This method is called when the XPath handler matches the XPath expression.
`void` | `startDocumentFragment()` The start of the document fragment.
`void` | `startElement(org.apache.xerces.xni.QName element, org.apache.xerces.xni.XMLAttributes attributes)` The start of an element.
`java.lang.String` | `toString()` Returns a string representation of this object.

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

Field Detail

### DEBUG_ALL

    protected static final boolean DEBUG_ALL

  Compile to true to debug everything.

### DEBUG_METHODS

    protected static final boolean DEBUG_METHODS

  Compile to true to debug method callbacks.

### DEBUG_METHODS2

    protected static final boolean DEBUG_METHODS2

  Compile to true to debug important method callbacks.

### DEBUG_METHODS3

    protected static final boolean DEBUG_METHODS3

  Compile to true to debug the really important methods.

### DEBUG_MATCH

    protected static final boolean DEBUG_MATCH

  Compile to true to debug match.

### DEBUG_STACK

    protected static final boolean DEBUG_STACK

  Compile to true to debug step index stack.

### DEBUG_ANY

    protected static final boolean DEBUG_ANY

  Don't touch this value unless you add more debug constants.

### MATCHED

    protected static final int MATCHED

### MATCHED_ATTRIBUTE

    protected static final int MATCHED_ATTRIBUTE

### MATCHED_DESCENDANT

    protected static final int MATCHED_DESCENDANT

### MATCHED_DESCENDANT_PREVIOUS

    protected static final int MATCHED_DESCENDANT_PREVIOUS

### fMatchedString

    protected java.lang.Object fMatchedString

  The matching string.

Constructor Detail

### XPathMatcher

    public XPathMatcher(XPath xpath)

  Constructs an XPath matcher that implements a document fragment handler.
  Parameters:
    `xpath` - The xpath.

Method Detail

### isMatched

    public boolean isMatched()

  Returns value of first member of fMatched that is nonzero.

### handleContent

    protected void handleContent(org.apache.xerces.xs.XSTypeDefinition type,
                                 boolean nillable,
                                 java.lang.Object value,
                                 short valueType,
                                 org.apache.xerces.xs.ShortList itemValueType)

### matched

    protected void matched(java.lang.Object actualValue,
                           short valueType,
                           org.apache.xerces.xs.ShortList itemValueType,
                           boolean isNil)

  This method is called when the XPath handler matches the XPath expression. Subclasses can override this method to provide default handling upon a match.

### startDocumentFragment

    public void startDocumentFragment()

  The start of the document fragment.

### startElement

    public void startElement(org.apache.xerces.xni.QName element,
                             org.apache.xerces.xni.XMLAttributes attributes)

  The start of an element. If the document specifies the start element by using an empty tag, then the startElement method will immediately be followed by the endElement method, with no intervening methods.
  Parameters:
    `element` - The name of the element.
    `attributes` - The element attributes.
  Throws:
    `org.xml.sax.SAXException` - Thrown by handler to signal an error.

### endElement

    public void endElement(org.apache.xerces.xni.QName element,
                           org.apache.xerces.xs.XSTypeDefinition type,
                           boolean nillable,
                           java.lang.Object value,
                           short valueType,
                           org.apache.xerces.xs.ShortList itemValueType)

  Parameters:
    `element` - name of the element.
    `type` - content type of this element. IOW, the XML schema type of the `value`. Note that this may not be the type declared in the element declaration, but it is "the actual type". For example, if the XML is <foo xsi:type="xs:string">aaa</foo>, this parameter will be "xs:string".
    `nillable` - - nillable true if the element declaration is nillable.
    `value` - - actual value the typed value of the content of this element.

### toString

    public java.lang.String toString()

  Returns a string representation of this object.
  Overrides:
    `toString` in class `java.lang.Object`

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