/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * 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
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.layer0.request;

import java.util.Collection;
import java.util.Map;

import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.request.ResourceRead;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;

import gnu.trove.map.hash.THashMap;

public class UnescapedMethodMapOfResource extends ResourceRead<Map<String, Resource>> {

	public UnescapedMethodMapOfResource(Resource resource) {
	    super(resource);
	}

	@Override
	public Map<String,Resource> perform(ReadGraph graph) throws DatabaseException {

		Layer0 L0 = Layer0.getInstance(graph);
		Collection<Resource> predicates = graph.getPredicates(resource); 
        THashMap<String, Resource> result = new THashMap<String, Resource>(predicates.size());
		for(Resource predicate : predicates) {
			if(graph.isSubrelationOf(predicate, L0.HasMethod)) {
				String name = graph.getPossibleRelatedValue(predicate, L0.HasName, Bindings.STRING);
				if(name != null) {
			        if (result.put(name, predicate) != null)
			        	System.err.println(this + ": The database resource $" + resource.getResourceId() + " contains siblings with the same name " + name + " (resource=$" + predicate.getResourceId() +").");
				}
			}
		}
		return result;
		
	}
	
}