| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed 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. |
| */ |
| package org.apache.commons.jelly.util; |
| |
| import org.xml.sax.Attributes; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Ensures that only one start and end document event is passed onto the underlying |
| * ContentHandler. This object can only be used once and then discarded. |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| */ |
| public class SafeContentHandler implements ContentHandler { |
| private ContentHandler handler; |
| private boolean documentStarted; |
| private boolean documentEnded; |
| |
| public SafeContentHandler(ContentHandler handler) { |
| this.handler = handler; |
| } |
| |
| /** |
| * @throws org.xml.sax.SAXException |
| */ |
| public void startDocument() throws SAXException { |
| if (! documentStarted) { |
| handler.startDocument(); |
| documentStarted = true; |
| } |
| } |
| |
| /** |
| * @throws org.xml.sax.SAXException |
| */ |
| public void endDocument() throws SAXException { |
| if (! documentEnded) { |
| handler.endDocument(); |
| documentEnded = true; |
| } |
| } |
| |
| /** |
| * @param arg0 |
| * @param arg1 |
| * @param arg2 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void characters(char[] arg0, int arg1, int arg2) |
| throws SAXException { |
| handler.characters(arg0, arg1, arg2); |
| } |
| |
| /** |
| * @param arg0 |
| * @param arg1 |
| * @param arg2 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void endElement(String arg0, String arg1, String arg2) |
| throws SAXException { |
| handler.endElement(arg0, arg1, arg2); |
| } |
| |
| /** |
| * @param arg0 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void endPrefixMapping(String arg0) throws SAXException { |
| handler.endPrefixMapping(arg0); |
| } |
| |
| /** |
| * @param arg0 |
| * @param arg1 |
| * @param arg2 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void ignorableWhitespace(char[] arg0, int arg1, int arg2) |
| throws SAXException { |
| handler.ignorableWhitespace(arg0, arg1, arg2); |
| } |
| |
| /** |
| * @param arg0 |
| * @param arg1 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void processingInstruction(String arg0, String arg1) |
| throws SAXException { |
| handler.processingInstruction(arg0, arg1); |
| } |
| |
| /** |
| * @param arg0 |
| */ |
| public void setDocumentLocator(Locator arg0) { |
| handler.setDocumentLocator(arg0); |
| } |
| |
| /** |
| * @param arg0 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void skippedEntity(String arg0) throws SAXException { |
| handler.skippedEntity(arg0); |
| } |
| |
| /** |
| * @param arg0 |
| * @param arg1 |
| * @param arg2 |
| * @param arg3 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void startElement( |
| String arg0, |
| String arg1, |
| String arg2, |
| Attributes arg3) |
| throws SAXException { |
| handler.startElement(arg0, arg1, arg2, arg3); |
| } |
| |
| /** |
| * @param arg0 |
| * @param arg1 |
| * @throws org.xml.sax.SAXException |
| */ |
| public void startPrefixMapping(String arg0, String arg1) |
| throws SAXException { |
| handler.startPrefixMapping(arg0, arg1); |
| } |
| } |