001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 * $Id$
019 */
020
021package org.nuxeo.runtime.model.impl;
022
023import java.io.IOException;
024import java.io.InputStream;
025
026import org.nuxeo.common.xmap.Context;
027import org.nuxeo.common.xmap.XMap;
028import org.nuxeo.common.xmap.XValueFactory;
029import org.nuxeo.runtime.Version;
030import org.nuxeo.runtime.model.ComponentName;
031import org.nuxeo.runtime.model.RuntimeContext;
032
033/**
034 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
035 */
036public class ExtensionDescriptorReader {
037
038    protected final XMap xmap;
039
040    public ExtensionDescriptorReader() {
041        xmap = new XMap();
042        xmap.setValueFactory(ComponentName.class, new XValueFactory() {
043            @Override
044            public Object deserialize(Context context, String value) {
045                return new ComponentName(value);
046            }
047
048            @Override
049            public String serialize(Context context, Object value) {
050                if (value != null) {
051                    return value.toString();
052                }
053                return null;
054            }
055        });
056        xmap.setValueFactory(Version.class, new XValueFactory() {
057
058            @Override
059            public Object deserialize(Context context, String value) {
060                return Version.parseString(value);
061            }
062
063            @Override
064            public String serialize(Context context, Object value) {
065                if (value != null) {
066                    return value.toString();
067                }
068                return null;
069            }
070        });
071        xmap.register(ExtensionImpl.class);
072    }
073
074    public ExtensionImpl read(RuntimeContext ctx, InputStream in) throws IOException {
075        Object[] result = xmap.loadAll(new XMapContext(ctx), in);
076        if (result.length > 0) {
077            return (ExtensionImpl) result[0];
078        }
079        return null;
080    }
081
082    public XMap getXMap() {
083        return xmap;
084    }
085
086}