impl.com.sun.xml.bind.v2.runtime.unmarshaller.DomLoader Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of ehcache Show documentation
Show all versions of ehcache Show documentation
Ehcache is an open source, standards-based cache used to boost performance,
offload the database and simplify scalability. Ehcache is robust, proven and full-featured and
this has made it the most widely-used Java-based cache.
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.xml.bind.v2.runtime.unmarshaller;
import com.sun.xml.bind.v2.WellKnownNamespace;
import javax.xml.bind.annotation.DomHandler;
import javax.xml.transform.Result;
import javax.xml.transform.sax.TransformerHandler;
import com.sun.xml.bind.v2.runtime.JAXBContextImpl;
import org.xml.sax.SAXException;
/**
* Loads a DOM.
*
* @author Kohsuke Kawaguchi
*/
public class DomLoader extends Loader {
private final DomHandler dom;
/**
* Used to capture the state.
*
* This instance is created for each unmarshalling episode.
*/
private final class State {
/** This handler will receive SAX events. */
private final TransformerHandler handler = JAXBContextImpl.createTransformerHandler();
/** {@link #handler} will produce this result. */
private final ResultT result;
// nest level of elements.
int depth = 1;
public State( UnmarshallingContext context ) throws SAXException {
result = dom.createUnmarshaller(context);
handler.setResult(result);
// emulate the start of documents
try {
handler.setDocumentLocator(context.getLocator());
handler.startDocument();
declarePrefixes( context, context.getAllDeclaredPrefixes() );
} catch( SAXException e ) {
context.handleError(e);
throw e;
}
}
public Object getElement() {
return dom.getElement(result);
}
private void declarePrefixes( UnmarshallingContext context, String[] prefixes ) throws SAXException {
for( int i=prefixes.length-1; i>=0; i-- ) {
String nsUri = context.getNamespaceURI(prefixes[i]);
if(nsUri==null) throw new IllegalStateException("prefix \'"+prefixes[i]+"\' isn't bound");
handler.startPrefixMapping(prefixes[i],nsUri );
}
}
private void undeclarePrefixes( String[] prefixes ) throws SAXException {
for( int i=prefixes.length-1; i>=0; i-- )
handler.endPrefixMapping( prefixes[i] );
}
}
public DomLoader(DomHandler dom) {
super(true);
this.dom = dom;
}
@Override
public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
UnmarshallingContext context = state.getContext();
if (state.target == null)
state.target = new State(context);
State s = (State) state.target;
try {
s.declarePrefixes(context, context.getNewlyDeclaredPrefixes());
s.handler.startElement(ea.uri, ea.local, ea.getQname(), ea.atts);
} catch (SAXException e) {
context.handleError(e);
throw e;
}
}
@Override
public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
state.loader = this;
State s = (State) state.prev.target;
s.depth++;
state.target = s;
}
@Override
public void text(UnmarshallingContext.State state, CharSequence text) throws SAXException {
if(text.length()==0)
return; // there's no point in creating an empty Text node in DOM.
try {
State s = (State) state.target;
s.handler.characters(text.toString().toCharArray(),0,text.length());
} catch( SAXException e ) {
state.getContext().handleError(e);
throw e;
}
}
@Override
public void leaveElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
State s = (State) state.target;
UnmarshallingContext context = state.getContext();
try {
s.handler.endElement(ea.uri, ea.local, ea.getQname());
s.undeclarePrefixes(context.getNewlyDeclaredPrefixes());
} catch( SAXException e ) {
context.handleError(e);
throw e;
}
if((--s.depth)==0) {
// emulate the end of the document
try {
s.undeclarePrefixes(context.getAllDeclaredPrefixes());
s.handler.endDocument();
} catch( SAXException e ) {
context.handleError(e);
throw e;
}
// we are done
state.target = s.getElement();
}
}
}