JAXPExtensionsProviderpublic class JAXPExtensionsProvider extends Object implements ExtensionsProvider
| Fields Summary |
|---|
| private final XPathFunctionResolver | resolver | | private boolean | extensionInvocationDisabled |
| Constructors Summary |
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public JAXPExtensionsProvider(XPathFunctionResolver resolver)
this.resolver = resolver;
this.extensionInvocationDisabled = false;
| public JAXPExtensionsProvider(XPathFunctionResolver resolver, boolean featureSecureProcessing)
this.resolver = resolver;
this.extensionInvocationDisabled = featureSecureProcessing;
|
| Methods Summary |
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| public boolean | elementAvailable(java.lang.String ns, java.lang.String elemName)Is the extension element available?
return false;
| | public java.lang.Object | extFunction(java.lang.String ns, java.lang.String funcName, java.util.Vector argVec, java.lang.Object methodKey)Execute the extension function.
try {
if ( funcName == null ) {
String fmsg = XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
new Object[] {"Function Name"} );
throw new NullPointerException ( fmsg );
}
//Find the XPathFunction corresponding to namespace and funcName
javax.xml.namespace.QName myQName = new QName( ns, funcName );
// JAXP 1.3 spec says When XMLConstants.FEATURE_SECURE_PROCESSING
// feature is set then invocation of extension functions need to
// throw XPathFunctionException
if ( extensionInvocationDisabled ) {
String fmsg = XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED,
new Object[] { myQName.toString() } );
throw new XPathFunctionException ( fmsg );
}
// Assuming user is passing all the needed parameters ( including
// default values )
int arity = argVec.size();
javax.xml.xpath.XPathFunction xpathFunction =
resolver.resolveFunction ( myQName, arity );
// not using methodKey
ArrayList argList = new ArrayList( arity);
for ( int i=0; i<arity; i++ ) {
Object argument = argVec.elementAt( i );
// XNodeSet object() returns NodeVector and not NodeList
// Explicitly getting NodeList by using nodelist()
if ( argument instanceof XNodeSet ) {
argList.add ( i, ((XNodeSet)argument).nodelist() );
} else if ( argument instanceof XObject ) {
Object passedArgument = ((XObject)argument).object();
argList.add ( i, passedArgument );
} else {
argList.add ( i, argument );
}
}
return ( xpathFunction.evaluate ( argList ));
} catch ( XPathFunctionException xfe ) {
// If we get XPathFunctionException then we want to terminate
// further execution by throwing WrappedRuntimeException
throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException ( xfe );
} catch ( Exception e ) {
throw new javax.xml.transform.TransformerException ( e );
}
| | public java.lang.Object | extFunction(com.sun.org.apache.xpath.internal.functions.FuncExtFunction extFunction, java.util.Vector argVec)Execute the extension function.
try {
String namespace = extFunction.getNamespace();
String functionName = extFunction.getFunctionName();
int arity = extFunction.getArgCount();
javax.xml.namespace.QName myQName =
new javax.xml.namespace.QName( namespace, functionName );
// JAXP 1.3 spec says When XMLConstants.FEATURE_SECURE_PROCESSING
// feature is set then invocation of extension functions need to
// throw XPathFunctionException
if ( extensionInvocationDisabled ) {
String fmsg = XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED, new Object[] { myQName.toString() } );
throw new XPathFunctionException ( fmsg );
}
XPathFunction xpathFunction =
resolver.resolveFunction( myQName, arity );
ArrayList argList = new ArrayList( arity);
for ( int i=0; i<arity; i++ ) {
Object argument = argVec.elementAt( i );
// XNodeSet object() returns NodeVector and not NodeList
// Explicitly getting NodeList by using nodelist()
if ( argument instanceof XNodeSet ) {
argList.add ( i, ((XNodeSet)argument).nodelist() );
} else if ( argument instanceof XObject ) {
Object passedArgument = ((XObject)argument).object();
argList.add ( i, passedArgument );
} else {
argList.add ( i, argument );
}
}
return ( xpathFunction.evaluate ( argList ));
} catch ( XPathFunctionException xfe ) {
// If we get XPathFunctionException then we want to terminate
// further execution by throwing WrappedRuntimeException
throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException ( xfe );
} catch ( Exception e ) {
throw new javax.xml.transform.TransformerException ( e );
}
| | public boolean | functionAvailable(java.lang.String ns, java.lang.String funcName)Is the extension function available?
try {
if ( funcName == null ) {
String fmsg = XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
new Object[] {"Function Name"} );
throw new NullPointerException ( fmsg );
}
//Find the XPathFunction corresponding to namespace and funcName
javax.xml.namespace.QName myQName = new QName( ns, funcName );
javax.xml.xpath.XPathFunction xpathFunction =
resolver.resolveFunction ( myQName, 0 );
if ( xpathFunction == null ) {
return false;
}
return true;
} catch ( Exception e ) {
return false;
}
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