/*
* 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.shindig.protocol.conversion;
import org.apache.commons.betwixt.IntrospectionConfiguration;
import org.apache.commons.betwixt.io.BeanReader;
import org.apache.commons.betwixt.io.BeanWriter;
import org.apache.shindig.protocol.ContentTypes;
import org.xml.sax.SAXException;
import java.beans.IntrospectionException;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
// TODO: This does not produce valid atom sytnax yet
public class BeanAtomConverter implements BeanConverter {
private static final Logger logger =
Logger.getLogger(BeanAtomConverter.class.getName());
public String getContentType() {
return ContentTypes.OUTPUT_ATOM_CONTENT_TYPE;
}
public String convertToString(Object pojo) {
return convertToXml(pojo);
}
public String convertToXml(Object obj) {
String xmlHead="<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
StringWriter outputWriter = new StringWriter();
BeanWriter writer = new BeanWriter(outputWriter);
IntrospectionConfiguration configuration = writer.getXMLIntrospector().getConfiguration();
configuration.setAttributesForPrimitives(false);
configuration.setWrapCollectionsInElement(true);
writer.getBindingConfiguration().setMapIDs(false);
// Print no line endings
writer.setEndOfLine("");
writer.setWriteEmptyElements(false);
// Still left to do:
//
// Fix map output with custom outputter:
// for a map with {key : value, key2 : value2} we need:
// <key>value</key> <key2>value2</key2>
// Supress empty lists
// Within a list the items need to be renamed - this probably means with need a .betwixt file
String toReturn = xmlHead;
try {
writer.write("response", obj);
toReturn =toReturn+ outputWriter.toString();
if (logger.isLoggable(Level.FINEST)) logger.finest("XML is: " + toReturn + "\n **** \n\n");
} catch (SAXException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
} catch (IOException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
} catch (IntrospectionException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
} finally {
try {
writer.close();
} catch (IOException e) {
if (logger.isLoggable(Level.FINEST)) logger.log(Level.FINEST, e.getMessage(), e);
}
}
return toReturn;
}
public static final String ERROR_MESSAGE_FMT = "Could not convert %s to %s";
@SuppressWarnings("unchecked")
public <T> T convertToObject(String xml, Class<T> className) {
xml=xml.substring(xml.indexOf("?>") + 2);
BeanReader reader = new BeanReader();
try {
reader.registerBeanClass("activity", className);
StringReader rd = new StringReader(xml);
return (T) reader.parse(rd);
} catch (IntrospectionException e) {
throw new RuntimeException(String.format(ERROR_MESSAGE_FMT, xml, className), e);
} catch (IOException e) {
throw new RuntimeException(String.format(ERROR_MESSAGE_FMT, xml, className), e);
} catch (SAXException e) {
throw new RuntimeException(String.format(ERROR_MESSAGE_FMT, xml, className), e);
}
}
public void append(Appendable buf, Object pojo) throws IOException {
buf.append(convertToString(pojo));
}
}