/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.wps.ppio;
import java.io.InputStream;
import org.xml.sax.ContentHandler;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.SaxWriter;
import com.thoughtworks.xstream.mapper.Mapper;
import com.thoughtworks.xstream.mapper.MapperWrapper;
/**
* Turns beans into xml using XStream (one way). By default it strips package names and have tags
* start with a capital letter, subclasses can be created to override such behavior
*
* @author Andrea Aime - GeoSolutions
*/
public class XStreamPPIO extends XMLPPIO {
protected XStreamPPIO(Class type) {
super(type, type, null);
}
@Override
public void encode(Object object, ContentHandler handler) throws Exception {
// prepare xml encoding
XStream xstream = buildXStream();
// bind with the content handler
SaxWriter writer = new SaxWriter();
writer.setContentHandler(handler);
// write out xml
xstream.marshal(object, writer);
}
/**
* Subclasses can override the XStream configuration here. By default XStream is setup to strip
* package names, have tags starts with a capital letter, and flatten out collections
*
* @param xstream
*/
protected XStream buildXStream() {
XStream stream = new XStream() {
protected MapperWrapper wrapMapper(MapperWrapper next) {
return new UppercaseTagMapper(new PackageStrippingMapper(next));
};
};
return stream;
}
@Override
public Object decode(InputStream input) throws Exception {
throw new UnsupportedOperationException("XML parsing is not supported");
}
/**
* Strips the package names from classes
*/
protected static class PackageStrippingMapper extends MapperWrapper {
public PackageStrippingMapper(Mapper wrapped) {
super(wrapped);
}
public String serializedClass(Class type) {
return type.getName().replaceFirst(".*\\.", "");
}
}
protected static class UppercaseTagMapper extends MapperWrapper {
public UppercaseTagMapper(Mapper wrapped) {
super(wrapped);
}
public String serializedMember(Class type, String memberName) {
char startChar = memberName.charAt(0);
if (Character.isLowerCase(startChar)) {
if (memberName.length() > 1) {
return Character.toUpperCase(startChar) + memberName.substring(1);
} else {
return String.valueOf(Character.toUpperCase(startChar));
}
} else {
return memberName;
}
}
public String realMember(Class type, String serialized) {
String fieldName = super.realMember(type, serialized);
try {
type.getDeclaredField(fieldName);
return fieldName;
} catch (NoSuchFieldException e) {
char startChar = fieldName.charAt(0);
if (fieldName.length() > 1) {
return Character.toLowerCase(startChar) + fieldName.substring(1);
} else {
return String.valueOf(Character.toLowerCase(startChar));
}
}
}
}
}