aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.bind.v2.runtime.unmarshaller;
aoqi@0: 
aoqi@0: import javax.xml.namespace.NamespaceContext;
aoqi@0: 
aoqi@0: import org.xml.sax.Attributes;
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * {@link XmlVisitor} decorator that interns all string tokens.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi
aoqi@0:  */
aoqi@0: public final class InterningXmlVisitor implements XmlVisitor {
aoqi@0:     private final XmlVisitor next;
aoqi@0: 
aoqi@0:     private final AttributesImpl attributes = new AttributesImpl();
aoqi@0: 
aoqi@0:     public InterningXmlVisitor(XmlVisitor next) {
aoqi@0:         this.next = next;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startDocument(LocatorEx locator, NamespaceContext nsContext) throws SAXException {
aoqi@0:         next.startDocument(locator,nsContext);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endDocument() throws SAXException {
aoqi@0:         next.endDocument();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startElement(TagName tagName ) throws SAXException {
aoqi@0:         attributes.setAttributes(tagName.atts);
aoqi@0:         tagName.atts = attributes;
aoqi@0:         tagName.uri = intern(tagName.uri);
aoqi@0:         tagName.local = intern(tagName.local);
aoqi@0:         next.startElement(tagName);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endElement(TagName tagName ) throws SAXException {
aoqi@0:         tagName.uri = intern(tagName.uri);
aoqi@0:         tagName.local = intern(tagName.local);
aoqi@0:         next.endElement(tagName);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void startPrefixMapping( String prefix, String nsUri ) throws SAXException {
aoqi@0:         next.startPrefixMapping(intern(prefix),intern(nsUri));
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void endPrefixMapping( String prefix ) throws SAXException {
aoqi@0:         next.endPrefixMapping(intern(prefix));
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void text( CharSequence pcdata ) throws SAXException {
aoqi@0:         next.text(pcdata);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public UnmarshallingContext getContext() {
aoqi@0:         return next.getContext();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public TextPredictor getPredictor() {
aoqi@0:         return next.getPredictor();
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static class AttributesImpl implements Attributes {
aoqi@0:         private Attributes core;
aoqi@0: 
aoqi@0:         void setAttributes(Attributes att) {
aoqi@0:             this.core = att;
aoqi@0:         }
aoqi@0: 
aoqi@0:         public int getIndex(String qName) {
aoqi@0:             return core.getIndex(qName);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public int getIndex(String uri, String localName) {
aoqi@0:             return core.getIndex(uri, localName);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public int getLength() {
aoqi@0:             return core.getLength();
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getLocalName(int index) {
aoqi@0:             return intern(core.getLocalName(index));
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getQName(int index) {
aoqi@0:             return intern(core.getQName(index));
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getType(int index) {
aoqi@0:             return intern(core.getType(index));
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getType(String qName) {
aoqi@0:             return intern(core.getType(qName));
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getType(String uri, String localName) {
aoqi@0:             return intern(core.getType(uri, localName));
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getURI(int index) {
aoqi@0:             return intern(core.getURI(index));
aoqi@0:         }
aoqi@0: 
aoqi@0:         //
aoqi@0:         // since values may vary a lot,
aoqi@0:         // we don't (probably shouldn't) intern values.
aoqi@0:         //
aoqi@0: 
aoqi@0:         public String getValue(int index) {
aoqi@0:             return core.getValue(index);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getValue(String qName) {
aoqi@0:             return core.getValue(qName);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getValue(String uri, String localName) {
aoqi@0:             return core.getValue(uri, localName);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static String intern(String s) {
aoqi@0:         if(s==null)     return null;
aoqi@0:         else            return s.intern();
aoqi@0:     }
aoqi@0: }