/**@class javax.xml.xpath.XPathExpression
 <p><code>XPathExpression</code> provides access to compiled XPath expressions.</p>

 <table id="XPathExpression-evaluation" border="1" cellpadding="2">
   <thead>
     <tr>
       <th colspan="2">Evaluation of XPath Expressions.</th>
     </tr>
   </thead>
   <tbody>
     <tr>
       <td>context</td>
       <td>
         If a request is made to evaluate the expression in the absence
 of a context item, an empty document node will be used for the context.
 For the purposes of evaluating XPath expressions, a DocumentFragment
 is treated like a Document node.
      </td>
    </tr>
    <tr>
      <td>variables</td>
      <td>
        If the expression contains a variable reference, its value will be found through the {@link javax.xml.xpath.XPathVariableResolver}.
        An {@link javax.xml.xpath.XPathExpressionException} is raised if the variable resolver is undefined or
        the resolver returns <code>null</code> for the variable.
        The value of a variable must be immutable through the course of any single evaluation.</p>
      </td>
    </tr>
    <tr>
      <td>functions</td>
      <td>
        If the expression contains a function reference, the function will be found through the {@link javax.xml.xpath.XPathFunctionResolver}.
        An {@link javax.xml.xpath.XPathExpressionException} is raised if the function resolver is undefined or
        the function resolver returns <code>null</code> for the function.</p>
      </td>
    </tr>
    <tr>
      <td>QNames</td>
      <td>
        QNames in the expression are resolved against the XPath namespace context.
      </td>
    </tr>
    <tr>
      <td>result</td>
      <td>
        This result of evaluating an expression is converted to an instance of the desired return type.
        Valid return types are defined in {@link javax.xml.xpath.XPathConstants}.
        Conversion to the return type follows XPath conversion rules.</p>
      </td>
    </tr>
 </table>

 @author  <a href="mailto:Norman.Walsh@Sun.com">Norman Walsh</a>
 @author  <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a>
 @version $Revision: 446598 $, $Date: 2006-09-15 05:55:40 -0700 (Fri, 15 Sep 2006) $
 @see <a href="http://www.w3.org/TR/xpath#section-Expressions">XML Path Language (XPath) Version 1.0, Expressions</a>
 @since 1.5
*/
var XPathExpression = {

/**<p>Evaluate the compiled XPath expression in the specified context and return the result as the specified type.</p>

 <p>See <a href="#XPathExpression-evaluation">Evaluation of XPath Expressions</a> for context item evaluation,
 variable, function and QName resolution and return type conversion.</p>

 <p>If <code>returnType</code> is not one of the types defined in {@link javax.xml.xpath.XPathConstants},
 then an <code>IllegalArgumentException</code> is thrown.</p>

 <p>If a <code>null</code> value is provided for
 <code>item</code>, an empty document will be used for the
 context.
 If <code>returnType</code> is <code>null</code>, then a <code>NullPointerException</code> is thrown.</p>
@param {Object {Object}} item The starting context (node or node list, for example).
@param {Object {QName}} returnType The desired return type.
@return {Object {java.lang.Object}} The <code>Object</code> that is the result of evaluating the expression and converting the result to
   <code>returnType</code>.
@throws XPathExpressionException If the expression cannot be evaluated.
@throws IllegalArgumentException If <code>returnType</code> is not one of the types defined in {@link XPathConstants}.
@throws NullPointerException If  <code>returnType</code> is <code>null</code>.
*/
evaluate : function(  ) {},

/**<p>Evaluate the compiled XPath expression in the specified context and return the result as a <code>String</code>.</p>

 <p>This method calls {@link #evaluate(Object item, QName returnType)} with a <code>returnType</code> of
 {@link javax.xml.xpath.XPathConstants#STRING}.</p>

 <p>See <a href="#XPathExpression-evaluation">Evaluation of XPath Expressions</a> for context item evaluation,
 variable, function and QName resolution and return type conversion.</p>

 <p>If a <code>null</code> value is provided for
 <code>item</code>, an empty document will be used for the
 context.
@param {Object {Object}} item The starting context (node or node list, for example).
@return {String} The <code>String</code> that is the result of evaluating the expression and converting the result to a
   <code>String</code>.
@throws XPathExpressionException If the expression cannot be evaluated.
*/
evaluate : function(  ) {},

/**<p>Evaluate the compiled XPath expression in the context of the specified <code>InputSource</code> and return the result as the
 specified type.</p>

 <p>This method builds a data model for the {@link InputSource} and calls
 {@link #evaluate(Object item, QName returnType)} on the resulting document object.</p>

 <p>See <a href="#XPathExpression-evaluation">Evaluation of XPath Expressions</a> for context item evaluation,
 variable, function and QName resolution and return type conversion.</p>

 <p>If <code>returnType</code> is not one of the types defined in {@link javax.xml.xpath.XPathConstants},
 then an <code>IllegalArgumentException</code> is thrown.</p>

 <p>If <code>source</code> or <code>returnType</code> is <code>null</code>,
 then a <code>NullPointerException</code> is thrown.</p>
@param {Object {InputSource}} source The <code>InputSource</code> of the document to evaluate over.
@param {Object {QName}} returnType The desired return type.
@return {Object {java.lang.Object}} The <code>Object</code> that is the result of evaluating the expression and converting the result to
   <code>returnType</code>.
@throws XPathExpressionException If the expression cannot be evaluated.
@throws IllegalArgumentException If <code>returnType</code> is not one of the types defined in {@link XPathConstants}.
@throws NullPointerException If  <code>source</code> or <code>returnType</code> is <code>null</code>.
*/
evaluate : function(  ) {},

/**<p>Evaluate the compiled XPath expression in the context of the specified <code>InputSource</code> and return the result as a
 <code>String</code>.</p>

 <p>This method calls {@link #evaluate(InputSource source, QName returnType)} with a <code>returnType</code> of
 {@link javax.xml.xpath.XPathConstants#STRING}.</p>

 <p>See <a href="#XPathExpression-evaluation">Evaluation of XPath Expressions</a> for context item evaluation,
 variable, function and QName resolution and return type conversion.</p>

 <p>If <code>source</code> is <code>null</code>, then a <code>NullPointerException</code> is thrown.</p>
@param {Object {InputSource}} source The <code>InputSource</code> of the document to evaluate over.
@return {String} The <code>String</code> that is the result of evaluating the expression and converting the result to a
   <code>String</code>.
@throws XPathExpressionException If the expression cannot be evaluated.
@throws NullPointerException If  <code>source</code> is <code>null</code>.
*/
evaluate : function(  ) {},


};