net.sf.swan.xpath
Class Selector

java.lang.Object
  |
  +--net.sf.swan.xpath.XPathSupport
        |
        +--net.sf.swan.xpath.Selector

public class Selector

extends XPathSupport

Utility for evaluating XPath expressions.

NOTE: Objects of this type are not thread-safe.

To facilitate sharing state between Selectors, you can setup one Selector as a prototype and use the XPathSupport.createSelector() method to create other thread-specific Selectors.

Fields inherited from class net.sf.swan.xpath.XPathSupport

defaultParseAdapter, verifyVars

Constructor Summary

	Selector()
	Selector(org.jaxen.Navigator navigator)
protected	Selector(Selector prototype)
protected	Selector(XPathSupport prototype)

Method Summary

void	clearExpressions()
java.lang.Object	first(java.lang.String expr, java.lang.Object contextNode) Evaluate an XPath expression relative to the specified context node and return the first matching result.
protected org.jaxen.Context	getContext(java.lang.Object node)
protected org.jaxen.expr.Expr	getXPath(java.lang.String expr)
void	putNamespace(java.lang.String prefix, java.lang.String uri) Define a namespace mapping to be used in parsing XPath expressions.
java.util.List	select(java.lang.String expr, java.lang.Object contextNode) Evaluate an XPath expression relative to the specified context node.
java.lang.String	string(java.lang.String expr, java.lang.Object contextNode) Evaluate an XPath expression relative to the specified context node as a String.
boolean	test(java.lang.String expr, java.lang.Object contextNode) Evaluate an XPath expression relative to the specified context node as a boolean.

Methods inherited from class net.sf.swan.xpath.XPathSupport

createContextSupport, createFunctionContext, createMatchContext, createMatcher, createNamespaceContext, createSelector, createVariableContext, getContextSupport, getDocument, getFunctionContext, getNavigator, getReader, getVariableValue, getVariableValue, getVariableValue, keyMap, parseAVT, parseAVT, parsePattern, parsePattern, parseXPath, parseXPath, putVariableValue, putVariableValue, resolveNamespacePrefix, setFunctionContext, setNavigator, toBoolean, toList, toSingle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Selector

public Selector()

Selector

public Selector(org.jaxen.Navigator navigator)
         throws org.saxpath.SAXPathException

Selector

protected Selector(Selector prototype)

Selector

protected Selector(XPathSupport prototype)

Method Detail

putNamespace

public void putNamespace(java.lang.String prefix,
                         java.lang.String uri)

Define a namespace mapping to be used in parsing XPath expressions.

Overrides:

putNamespace in class XPathSupport

select

public java.util.List select(java.lang.String expr,
                             java.lang.Object contextNode)
                      throws org.saxpath.SAXPathException

Evaluate an XPath expression relative to the specified context node.

first

public java.lang.Object first(java.lang.String expr,
                              java.lang.Object contextNode)
                       throws org.saxpath.SAXPathException

Evaluate an XPath expression relative to the specified context node and return the first matching result.

string

public java.lang.String string(java.lang.String expr,
                               java.lang.Object contextNode)
                        throws org.saxpath.SAXPathException

Evaluate an XPath expression relative to the specified context node as a String.

test

public boolean test(java.lang.String expr,
                    java.lang.Object contextNode)
             throws org.saxpath.SAXPathException

Evaluate an XPath expression relative to the specified context node as a boolean.

clearExpressions

public void clearExpressions()

getContext

protected org.jaxen.Context getContext(java.lang.Object node)
                                throws org.jaxen.JaxenException

getXPath

protected org.jaxen.expr.Expr getXPath(java.lang.String expr)
                                throws org.saxpath.SAXPathException