/**
* Copyright 2014 Opower, Inc.
* 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 com.opower.rest.client.generator.plugins.providers;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
/**
* Provider that reads and writes org.w3c.dom.Document
*
* @author <a href="sduskis@gmail.com>Solomon Duskis</a>
* @version $Revision: $
*/
@Provider
@Produces({"text/*+xml", "application/*+xml"})
@Consumes({"text/*+xml", "application/*+xml"})
public class DocumentProvider extends AbstractEntityProvider<Document>
{
private static final Logger logger = LoggerFactory.getLogger(DocumentProvider.class);
private final TransformerFactory transformerFactory;
private final DocumentBuilderFactory documentBuilder;
private final boolean expandEntityReferences;
public DocumentProvider() {
this(true);
}
public DocumentProvider(boolean expandEntityReferences)
{
this.documentBuilder = DocumentBuilderFactory.newInstance();
this.transformerFactory = TransformerFactory.newInstance();
this.expandEntityReferences = expandEntityReferences;
}
public boolean isReadable(Class<?> clazz, Type type,
Annotation[] annotation, MediaType mediaType)
{
return Document.class.isAssignableFrom(clazz);
}
public Document readFrom(Class<Document> clazz, Type type,
Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> headers, InputStream input)
throws IOException, WebApplicationException
{
try
{
documentBuilder.setExpandEntityReferences(expandEntityReferences);
return documentBuilder.newDocumentBuilder().parse(input);
}
catch (Exception e)
{
throw new RuntimeException("ReaderException: ", e);
}
}
public boolean isWriteable(Class<?> clazz, Type type,
Annotation[] annotation, MediaType mediaType)
{
return Document.class.isAssignableFrom(clazz);
}
public void writeTo(Document document, Class<?> clazz, Type type,
Annotation[] annotation, MediaType mediaType,
MultivaluedMap<String, Object> headers, OutputStream output)
throws IOException, WebApplicationException
{
try
{
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(output);
transformerFactory.newTransformer().transform(source, result);
}
catch (TransformerException te)
{
throw new RuntimeException("WriterException: ", te);
}
}
}