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XPathEvaluator Class Reference

#include <XPathEvaluator.hpp>

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Public Methods

Static Public Methods

Constructor & Destructor Documentation

XPathEvaluator::XPathEvaluator ( MemoryManagerType &theManager XALAN_DEFAULT_MEMMGR )
 

XPathEvaluator::~XPathEvaluator ( )
 

Member Function Documentation

XPath * XPathEvaluator::createXPath ( const XalanDOMChar * xpathString,
const PrefixResolver & prefixResolver )
 

Compile an XPath expression into an object which can be used multiple times.

Call destroyXPath() when finished with the instance. Otherwise, the object will be destroyed when the XPathEvaluator instance goes out of scope.

Parameters:
xpathString   The XPath expression to evaluate
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
A pointer to an XPath instance.

XPath * XPathEvaluator::createXPath ( const XalanDOMChar * xpathString,
DOMSupport & domSupport,
const XalanElement * namespaceNode )
 

Compile an XPath expression into an object which can be used multiple times.

Call destroyXPath() when finished with the instance. Otherwise, the object will be destroyed when the XPathEvaluator instance goes out of scope.

Parameters:
xpathString   The XPath expression to evaluate
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
namespaceNode   A node to use for namespace prefix resolution.
Returns:
A pointer to an XPath instance.

XPath * XPathEvaluator::createXPath ( const XalanDOMChar * xpathString )
 

Compile an XPath expression into an object which can be used multiple times.

Call destroyXPath() when finished with the instance. Otherwise, the object will be destroyed when the XPathEvaluator instance goes out of scope. Since no PrefixResolver is supplied, the XPath expression may not contain any namespace prefixes.

Parameters:
xpathString   The XPath expression to evaluate
Returns:
A pointer to an XPath instance.

bool XPathEvaluator::destroyXPath ( XPath * theXPath )
 

Destory a compiled XPath instance.

The instance must have been created using createXPath().

Parameters:
theXPath   The XPath instance to destroy
Returns:
true if the instance was successfully destroyed

XObjectPtr XPathEvaluator::evaluate ( DOMSupport & domSupport,
XalanNode * contextNode,
const XPath & xpath,
const PrefixResolver & prefixResolver )
 

Evaluate the supplied XPath expression, within the given context.

The result is returned as a generalized object. The object will be destroyed when the user's copy of the returned XObjectPtr goes out of scope, or when the XPathEvaluator goes out of scope or another expression is evaluated.

The user's XObjectPtr copy _must_ no longer be in scope when the XPathEvaluator instance goes out of scope, or another expression is evaluated.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpath   A reference to a compiled XPath expression.
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
The result of evaluting the XPath expression.

XObjectPtr XPathEvaluator::evaluate ( DOMSupport & domSupport,
XalanNode * contextNode,
const XPath & xpath,
const XalanElement * namespaceNode = 0 )
 

Evaluate the supplied XPath expression, within the given context.

The result is returned as a generalized object. The object will be destroyed when the user's copy of the returned XObjectPtr goes out of scope, or when the XPathEvaluator goes out of scope or another expression is evaluated.

The user's XObjectPtr copy _must_ no longer be in scope when the XPathEvaluator instance goes out of scope, or another expression is evaluated.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpath   A reference to a compiled XPath expression.
namespaceNode   A node to use for namespace prefix resolution.
Returns:
The result of evaluting the XPath expression.

XObjectPtr XPathEvaluator::evaluate ( DOMSupport & domSupport,
XalanNode * contextNode,
const XalanDOMChar * xpathString,
const PrefixResolver & prefixResolver )
 

Evaluate the supplied XPath expression, within the given context.

The result is returned as a generalized object. The object will be destroyed when the user's copy of the returned XObjectPtr goes out of scope, or when the XPathEvaluator goes out of scope or another expression is evaluated.

The user's XObjectPtr copy _must_ no longer be in scope when the XPathEvaluator instance goes out of scope, or another expression is evaluated.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpathString   The XPath expression to evaluate
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
The result of evaluting the XPath expression.

XObjectPtr XPathEvaluator::evaluate ( DOMSupport & domSupport,
XalanNode * contextNode,
const XalanDOMChar * xpathString,
const XalanElement * namespaceNode = 0 )
 

Evaluate the supplied XPath expression, within the given context.

The result is returned as a generalized object. The object will be destroyed when the user's copy of the returned XObjectPtr goes out of scope, or when the XPathEvaluator goes out of scope or another expression is evaluated.

The user's XObjectPtr copy _must_ no longer be in scope when the XPathEvaluator instance goes out of scope, or another expression is evaluated.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpathString   The XPath expression to evaluate
namespaceNode   A node to use for namespace prefix resolution.
Returns:
The result of evaluting the XPath expression.

void XPathEvaluator::initialize ( MemoryManagerType &theManager XALAN_DEFAULT_MEMMGR ) [static]
 

NodeRefList & XPathEvaluator::selectNodeList ( NodeRefList & result,
DOMSupport & domSupport,
XalanNode * contextNode,
const XPath & xpath,
const PrefixResolver & prefixResolver )
 

Evaluate the supplied XPath, within the given context.

If the expression doesn't select a node, an empty list is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpath   A reference to a compiled XPath expression.
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
A list of selected nodes.

NodeRefList & XPathEvaluator::selectNodeList ( NodeRefList & result,
DOMSupport & domSupport,
XalanNode * contextNode,
const XPath & xpath,
const XalanElement * namespaceNode = 0 )
 

Evaluate the supplied XPath, within the given context.

If the expression doesn't select a node, an empty list is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpath   A reference to a compiled XPath expression.
namespaceNode   A node to use for namespace prefix resolution.
Returns:
A list of selected nodes.

NodeRefList & XPathEvaluator::selectNodeList ( NodeRefList & result,
DOMSupport & domSupport,
XalanNode * contextNode,
const XalanDOMChar * xpathString,
const PrefixResolver & prefixResolver )
 

Evaluate the supplied XPath expression, within the given context.

If the expression doesn't select a node, an empty list is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpathString   The XPath expression to evaluate
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
A list of selected nodes.

NodeRefList & XPathEvaluator::selectNodeList ( NodeRefList & result,
DOMSupport & domSupport,
XalanNode * contextNode,
const XalanDOMChar * xpathString,
const XalanElement * namespaceNode = 0 )
 

Evaluate the supplied XPath expression, within the given context.

If the expression doesn't select a node, an empty list is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpathString   The XPath expression to evaluate
namespaceNode   A node to use for namespace prefix resolution.
Returns:
A list of selected nodes.

XalanNode * XPathEvaluator::selectSingleNode ( DOMSupport & domSupport,
XalanNode * contextNode,
const XPath & xpath,
const PrefixResolver & prefixResolver )
 

Evaluate the supplied XPath, within the given context.

If the expression doesn't select a node, 0 is returned. If it selects more than one node, only the first is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpath   A reference to a compiled XPath expression.
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
A pointer to the node selected by the expression, if any.

XalanNode * XPathEvaluator::selectSingleNode ( DOMSupport & domSupport,
XalanNode * contextNode,
const XPath & xpath,
const XalanElement * namespaceNode = 0 )
 

Evaluate the supplied XPath, within the given context.

If the expression doesn't select a node, 0 is returned. If it selects more than one node, only the first is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpath   A reference to a compiled XPath expression.
namespaceNode   A node to use for namespace prefix resolution.
Returns:
A pointer to the node selected by the expression, if any.

XalanNode * XPathEvaluator::selectSingleNode ( DOMSupport & domSupport,
XalanNode * contextNode,
const XalanDOMChar * xpathString,
const PrefixResolver & prefixResolver )
 

Evaluate the supplied XPath expression, within the given context.

If the expression doesn't select a node, 0 is returned. If it selects more than one node, only the first is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpathString   The XPath expression to evaluate
prefixResolver   A prefix resolver instance to use for namespace prefix resolution.
Returns:
A pointer to the node selected by the expression, if any.

XalanNode * XPathEvaluator::selectSingleNode ( DOMSupport & domSupport,
XalanNode * contextNode,
const XalanDOMChar * xpathString,
const XalanElement * namespaceNode = 0 )
 

Evaluate the supplied XPath expression, within the given context.

If the expression doesn't select a node, 0 is returned. If it selects more than one node, only the first is returned.

Parameters:
domSupport   An instance of the corresponding DOMSupport-derived for the DOM implementation being used.
contextNode   The source tree context node
xpathString   The XPath expression to evaluate
namespaceNode   A node to use for namespace prefix resolution.
Returns:
A pointer to the node selected by the expression, if any.

void XPathEvaluator::terminate ( ) [static]
 

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