/*
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.IOException;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Field;
import jease.cmf.domain.Node;
import jfix.db4o.Blob;
import jfix.util.Files;
public class Revisioner extends Serializer {
/**
* Create a new Revisioner. The service needs to know about all nodes which
* exist to configure the serializer properly.
*/
public Revisioner(Node... nodes) {
for (Node node : nodes) {
for (Field field : getFields(node)) {
if (isNotSerialized(field)
|| (isNodeDeclaringClass(field) && isNode(field))) {
omitField(field);
continue;
}
if (!isNodeDeclaringClass(field) && isNode(field)) {
registerConverter(field);
continue;
}
}
}
}
/**
* Serialize given Node into XML and return result as Blob.
*/
public Blob toBlob(Node node) {
if (node == null) {
return null;
}
try {
Blob blob = new Blob();
Writer writer = Files.newWriter(blob.getFile());
toXML(node, writer);
writer.close();
return blob;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* Deserializes given XML contained in Blob into Node.
*/
public Node fromBlob(Blob blob) {
if (blob == null) {
return null;
}
try {
Reader reader = Files.newReader(blob.getFile());
Node node = fromXML(reader);
reader.close();
return node;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}