| /** |
| * 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.oodt.opendapps.util; |
| |
| //JDK imports |
| import java.io.StringWriter; |
| import java.util.List; |
| import javax.xml.transform.OutputKeys; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMSource; |
| import javax.xml.transform.stream.StreamResult; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Node; |
| |
| //OODT imports |
| import org.apache.oodt.profile.Profile; |
| |
| /** |
| * Utility class to serialize a list of profiles to an XML document. |
| * <p/> |
| * Based on functionality already contained in the OODT grid ProfileQueryServlet |
| * class, but separated as a stand alone utility to reduce dependencies. |
| * |
| * @author Luca Cinquini |
| * |
| */ |
| public class ProfileSerializer { |
| |
| /** |
| * Function to serialize a list of {@link Profile}s to XML. |
| * |
| * @param profiles |
| * @return |
| * @throws TransformerException |
| */ |
| public static String toXML(final List<Profile> profiles) |
| throws TransformerException { |
| |
| final StringWriter writer = new StringWriter(); |
| writer.append("<?xml version='1.0' encoding='UTF-8'?>"); |
| writer.append("<!DOCTYPE profiles PUBLIC '" + Profile.PROFILES_DTD_FPI |
| + "' '" + Profile.PROFILES_DTD_URL + "'>"); |
| writer.append("<profiles>"); |
| |
| final Transformer transformer = createTransformer(); |
| final Document doc = Profile.createProfileDocument(); |
| for (final Profile profile : profiles) { |
| |
| Node profileNode = profile.toXML(doc); |
| DOMSource source = new DOMSource(profileNode); |
| StreamResult result = new StreamResult(writer); |
| transformer.transform(source, result); |
| |
| } |
| |
| writer.append("</profiles>"); |
| |
| return writer.toString(); |
| |
| } |
| |
| /** |
| * Create a transformer, properly configured for XML text serialization. |
| * |
| * @return a <code>Transformer</code> value. |
| * @throws TransformerException |
| * if an error occurs. |
| */ |
| private static Transformer createTransformer() throws TransformerException { |
| |
| Transformer transformer; |
| synchronized (TRANSFORMER_FACTORY) { |
| transformer = TRANSFORMER_FACTORY.newTransformer(); |
| } |
| |
| transformer.setOutputProperty(OutputKeys.METHOD, "xml"); |
| transformer.setOutputProperty(OutputKeys.VERSION, "1.0"); |
| transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); |
| transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); |
| transformer.setOutputProperty(OutputKeys.STANDALONE, "no"); |
| transformer.setOutputProperty(OutputKeys.INDENT, "yes"); |
| transformer.setOutputProperty(OutputKeys.MEDIA_TYPE, "text/xml"); |
| transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", |
| "4"); |
| |
| return transformer; |
| } |
| |
| /** Sole transformer factory this class will ever need. */ |
| private static final TransformerFactory TRANSFORMER_FACTORY = TransformerFactory |
| .newInstance(); |
| |
| } |