org.apache.xpath.jaxp.JAXPExtensionsProvider Maven / Gradle / Ivy
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Serializer to write out XML, HTML etc. as a stream of characters from an input DOM or from input
SAX events.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// $Id: JAXPExtensionsProvider.java 468655 2006-10-28 07:12:06Z minchau $
package org.apache.xpath.jaxp;
import javax.xml.transform.TransformerException;
import javax.xml.xpath.XPathFunctionResolver;
import javax.xml.xpath.XPathFunction;
import javax.xml.xpath.XPathFunctionException;
import org.apache.xpath.ExtensionsProvider;
import org.apache.xpath.XPathContext;
import org.apache.xpath.objects.XObject;
import org.apache.xpath.objects.XNodeSet;
import org.apache.xpath.res.XPATHErrorResources;
import org.apache.xalan.res.XSLMessages;
import org.apache.xpath.functions.FuncExtFunction;
import java.util.Vector;
import java.util.ArrayList;
import javax.xml.namespace.QName;
/**
*
* @author Ramesh Mandava ( [email protected] )
*/
public class JAXPExtensionsProvider implements ExtensionsProvider {
private final XPathFunctionResolver resolver;
private boolean extensionInvocationDisabled = false;
public JAXPExtensionsProvider(XPathFunctionResolver resolver) {
this.resolver = resolver;
this.extensionInvocationDisabled = false;
}
public JAXPExtensionsProvider(XPathFunctionResolver resolver,
boolean featureSecureProcessing ) {
this.resolver = resolver;
this.extensionInvocationDisabled = featureSecureProcessing;
}
/**
* Is the extension function available?
*/
public boolean functionAvailable(String ns, String funcName)
throws javax.xml.transform.TransformerException {
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;
}
}
/**
* Is the extension element available?
*/
public boolean elementAvailable(String ns, String elemName)
throws javax.xml.transform.TransformerException {
return false;
}
/**
* Execute the extension function.
*/
public Object extFunction(String ns, String funcName, Vector argVec,
Object methodKey) throws javax.xml.transform.TransformerException {
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