/*
Copyright (C) 2011 maik.jablonski@jease.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package jease.cmf.service;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Field;
import java.util.Set;
import jease.cmf.annotation.NotSerialized;
import jease.cmf.domain.Node;
import jfix.db4o.Blob;
import jfix.db4o.Persistent;
import jfix.db4o.xstream.converter.BlobConverter;
import jfix.db4o.xstream.converter.DelegateArrayConverter;
import jfix.util.Reflections;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.SingleValueConverter;
import com.thoughtworks.xstream.converters.SingleValueConverterWrapper;
public class Serializer {
private XStream xstream;
private Converter nodeConverter;
private Converter nodeArrayConverter;
public Serializer() {
xstream = new XStream();
xstream.registerConverter(new BlobConverter());
nodeConverter = new SingleValueConverterWrapper(new NodeConverter());
nodeArrayConverter = new DelegateArrayConverter(nodeConverter,
xstream.getMapper());
}
public Set<Field> getFields(Node node) {
return Reflections.getFields(node.getClass());
}
public void omitField(Field field) {
xstream.omitField(field.getDeclaringClass(), field.getName());
}
public void registerConverter(Field field) {
xstream.registerLocalConverter(field.getDeclaringClass(), field
.getName(), field.getType().isArray() ? nodeArrayConverter
: nodeConverter);
}
public boolean isBlob(Field field) {
return Reflections.isAssignable(Blob.class, field);
}
public boolean isNode(Field field) {
return Reflections.isAssignable(Node.class, field);
}
public boolean isPersistent(Field field) {
return Reflections.isAssignable(Persistent.class, field);
}
public boolean isPersistentEntity(Field field) {
return Reflections.isAssignable(Persistent.class, field)
&& !(Reflections.isAssignable(Persistent.Value.class, field));
}
public boolean isPersistentValue(Field field) {
return Reflections.isAssignable(Persistent.class, field)
&& Reflections.isAssignable(Persistent.Value.class, field);
}
public boolean isNodeDeclaringClass(Field field) {
return field.getDeclaringClass() == Node.class;
}
public boolean isNotSerialized(Field field) {
return field.getAnnotation(NotSerialized.class) != null;
}
public void toXML(Node node, Writer writer) {
xstream.toXML(node, writer);
}
public Node fromXML(Reader reader) {
return (Node) xstream.fromXML(reader);
}
private static class NodeConverter implements SingleValueConverter {
public boolean canConvert(Class clazz) {
return Node.class.isAssignableFrom(clazz);
}
public String toString(Object obj) {
return ((Node) obj).getPath();
}
public Object fromString(String str) {
return Nodes.getByPath(str);
}
}
}