| /* |
| * 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. |
| */ |
| package org.apache.karaf.util; |
| |
| import com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl; |
| import org.w3c.dom.Document; |
| import org.xml.sax.ErrorHandler; |
| import org.xml.sax.SAXException; |
| |
| import javax.xml.parsers.DocumentBuilder; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.transform.*; |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * Utils class to manipulate XML document in a thread safe way. |
| */ |
| public class XmlUtils { |
| |
| private static final ThreadLocal<DocumentBuilderFactory> DOCUMENT_BUILDER_FACTORY = new ThreadLocal<DocumentBuilderFactory>(); |
| private static final ThreadLocal<TransformerFactory> TRANSFORMER_FACTORY = new ThreadLocal<TransformerFactory>(); |
| |
| public static Document parse(String uri) throws TransformerException, IOException, SAXException, ParserConfigurationException { |
| DocumentBuilder db = documentBuilder(); |
| try { |
| return db.parse(uri); |
| } finally { |
| db.reset(); |
| } |
| } |
| |
| public static Document parse(File f) throws TransformerException, IOException, SAXException, ParserConfigurationException { |
| DocumentBuilder db = documentBuilder(); |
| try { |
| return db.parse(f); |
| } finally { |
| db.reset(); |
| } |
| } |
| |
| public static Document parse(File f, ErrorHandler errorHandler) throws TransformerException, IOException, SAXException, ParserConfigurationException { |
| DocumentBuilder db = documentBuilder(); |
| db.setErrorHandler(errorHandler); |
| try { |
| return db.parse(f); |
| } finally { |
| db.reset(); |
| } |
| } |
| |
| public static void transform(Source xmlSource, Result outputTarget) throws TransformerException { |
| Transformer t = transformer(); |
| try { |
| t.transform(xmlSource, outputTarget); |
| } finally { |
| t.reset(); |
| } |
| } |
| |
| public static void transform(Source xsltSource, Source xmlSource, Result outputTarget) throws TransformerException { |
| Transformer t = transformer(xsltSource); |
| try { |
| t.transform(xmlSource, outputTarget); |
| } finally { |
| t.reset(); |
| } |
| } |
| |
| private static DocumentBuilder documentBuilder() throws ParserConfigurationException { |
| DocumentBuilderFactory dbf; |
| if (DOCUMENT_BUILDER_FACTORY.get() == null) { |
| dbf = DocumentBuilderFactory.newInstance(); |
| dbf.setNamespaceAware(true); |
| DOCUMENT_BUILDER_FACTORY.set(dbf); |
| } else { |
| dbf = DOCUMENT_BUILDER_FACTORY.get(); |
| } |
| return dbf.newDocumentBuilder(); |
| } |
| |
| private static Transformer transformer() throws TransformerConfigurationException { |
| TransformerFactory tf; |
| if (TRANSFORMER_FACTORY.get() == null) { |
| tf = TransformerFactory.newInstance(); |
| TRANSFORMER_FACTORY.set(tf); |
| } else { |
| tf = TRANSFORMER_FACTORY.get(); |
| } |
| return tf.newTransformer(); |
| } |
| |
| private static Transformer transformer(Source xsltSource) throws TransformerConfigurationException { |
| TransformerFactory tf; |
| if (TRANSFORMER_FACTORY.get() == null) { |
| tf = TransformerFactory.newInstance(); |
| TRANSFORMER_FACTORY.set(tf); |
| } else { |
| tf = TRANSFORMER_FACTORY.get(); |
| } |
| return tf.newTransformer(xsltSource); |
| } |
| |
| } |