WorkspaceURIHandler.java

/**
 * (C) Copyright 2013 Jabylon (http://www.jabylon.org) and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
/**
 *
 */
package org.jabylon.common.resolver.impl;

import java.util.List;

import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.eclipse.emf.cdo.eresource.CDOResource;
import org.eclipse.emf.cdo.net4j.CDONet4jSession;
import org.eclipse.emf.cdo.view.CDOView;
import org.eclipse.emf.common.util.URI;
import org.jabylon.cdo.connector.RepositoryConnector;
import org.jabylon.cdo.server.ServerConstants;
import org.jabylon.common.resolver.URIHandler;
import org.jabylon.properties.Resolvable;
import org.jabylon.properties.Workspace;

/**
 * @author Johannes Utzig (jutzig.dev@googlemail.com)
 *
 */
@Component
@Service
public class WorkspaceURIHandler implements URIHandler {

    @Reference
    private RepositoryConnector repositoryConnector;
    private CDONet4jSession session;
    private Workspace workspace;

    @Activate
    public void activate() {
        session = repositoryConnector.createSession();
        CDOView view = repositoryConnector.openView(session);
        CDOResource workspaceResource = view.getResource(ServerConstants.WORKSPACE_RESOURCE);
        workspace = (Workspace) workspaceResource.getContents().get(0);
    }

    @Deactivate
    public void deactivate() {
        session.close();
    }

    /*
     * (non-Javadoc)
     *
     * @see
     * org.jabylon.common.resolver.URIResolver#resolve(org.eclipse.emf
     * .common.util.URI)
     */
    @Override
    public Object resolve(URI uri) {
        if (uri==null || uri.isEmpty() || uri.segmentCount()==0)
            return workspace;
        String firstSegment = uri.segment(0);
        if ("workspace".equals(firstSegment))
        {
            List<String> list = uri.segmentsList().subList(1, uri.segmentCount());
            URI relativeURI = URI.createHierarchicalURI(list.toArray(new String[list.size()]), uri.query(), uri.fragment());
            return workspace.resolveChild(relativeURI);
        }
        return null;


    }

    public void bindRepositoryConnector(RepositoryConnector connector) {
        this.repositoryConnector = connector;
    }

    public void unbindRepositoryConnector(RepositoryConnector connector) {
        this.repositoryConnector = null;
    }

    @Override
    public boolean canHandle(URI uri) {
        if (uri==null || uri.isEmpty() || uri.segmentCount()==0)
            return true;
        return "workspace".equals(uri.segment(0));
    }

    @Override
    public boolean canHandle(Object o) {
    	return o instanceof Resolvable;
    }

    @SuppressWarnings("rawtypes")
	@Override
    public URI toURI(Object o) {
    	if (o instanceof Resolvable) {
			Resolvable r = (Resolvable) o;
			return r.toURI();
		}
    	return null;
    }

}