/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.netbeans.modules.web.javascript.debugger.browser;

import java.util.Collection;
import javax.swing.event.ChangeListener;
import org.netbeans.api.project.Project;
import org.openide.util.ChangeSupport;
import org.openide.util.Lookup;
import org.openide.util.LookupEvent;
import org.openide.util.LookupListener;

/**
 *
 */
public class ProjectContext {

    private ChangeSupport support;
    private Lookup.Result<Project> res;

    public ProjectContext(Lookup projectContext) {
        support = new ChangeSupport(this);
        res = projectContext.lookupResult(Project.class);
        res.addLookupListener(new LookupListener() {
            @Override
            public void resultChanged(LookupEvent ev) {
                support.fireChange();
            }
        });
    }
    
    public Project getProject() {
        Collection<? extends Project> coll = res.allInstances();
        if (coll.isEmpty()) {
            return null;
        } else {
            return coll.iterator().next();
        }
    }
    
    public void addChangeSupport(ChangeListener l) {
        support.addChangeListener(l);
    }
    
    public void removeChangeSupport(ChangeListener l) {
        support.removeChangeListener(l);
    }
}
