| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds 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.jclouds.http.functions; |
| |
| import static org.jclouds.http.HttpUtils.releasePayload; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.reflect.Type; |
| |
| import javax.annotation.Resource; |
| import javax.inject.Inject; |
| import javax.inject.Singleton; |
| import javax.xml.bind.JAXBContext; |
| |
| import org.jclouds.http.HttpResponse; |
| import org.jclouds.http.HttpResponseException; |
| import org.jclouds.logging.Logger; |
| import org.jclouds.util.Strings2; |
| import org.jclouds.xml.XMLParser; |
| |
| import com.google.common.base.Function; |
| import com.google.inject.TypeLiteral; |
| |
| /** |
| * This object will parse the body of an HttpResponse and return the result of |
| * type <T> back to the caller. |
| * <p> |
| * {@link JAXBContext} works with {@link Class} objects instead of {@link Type}. |
| * This could be a limitation if we are trying to parse typed collections of |
| * objects. However, when using JAXB we expect to have well formed XML documents |
| * with one single root element, so the objects to parse should not be |
| * collections but objects that wrap collections of elements, and that should |
| * work fine. |
| * |
| * @author Ignasi Barrera |
| */ |
| @Singleton |
| public class ParseXMLWithJAXB<T> implements Function<HttpResponse, T> { |
| @Resource |
| protected Logger logger = Logger.NULL; |
| |
| protected XMLParser xml; |
| |
| protected final TypeLiteral<T> type; |
| |
| @Inject |
| public ParseXMLWithJAXB(final XMLParser xml, final TypeLiteral<T> type) { |
| this.xml = xml; |
| this.type = type; |
| } |
| |
| @Override |
| public T apply(final HttpResponse from) { |
| InputStream xml = from.getPayload().getInput(); |
| try { |
| return apply(xml); |
| } catch (Exception e) { |
| StringBuffer message = new StringBuffer(); |
| message.append("Error parsing input"); |
| logger.error(e, message.toString()); |
| throw new HttpResponseException(message.toString() + "\n" + from, null, from, e); |
| } finally { |
| releasePayload(from); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public T apply(final InputStream stream) throws IOException { |
| return (T) apply(stream, type.getRawType()); |
| } |
| |
| public <V> V apply(final InputStream stream, final Class<V> type) throws IOException { |
| try { |
| return xml.fromXML(Strings2.toStringAndClose(stream), type); |
| } finally { |
| if (stream != null) { |
| stream.close(); |
| } |
| } |
| } |
| |
| } |