MarkedElementsManagerImpl.java

// @formatter:off
 /*******************************************************************************
 *
 * This file is part of JMad.
 * 
 * Copyright (c) 2008-2011, CERN. All rights reserved.
 *
 * Licensed 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.
 * 
 ******************************************************************************/
// @formatter:on

package cern.accsoft.steering.jmad.gui.mark;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * the implementation for managing elements, that shall be displayed as markers in charts.
 * 
 * @author Kajetan Fuchsberger (kajetan.fuchsberger at cern.ch)
 */
public class MarkedElementsManagerImpl implements MarkedElementsManager {

    /** this set contains all the names */
    private Set<String> elementNames = new HashSet<String>();

    /** all the listeners to this manager */
    private List<MarkedElementsManagerListener> listeners = new ArrayList<MarkedElementsManagerListener>();

    @Override
    public void addElementName(String elementName) {
        this.elementNames.add(elementName);
        fireAddedElementName(elementName);
    }

    @Override
    public boolean contains(String elementName) {
        return this.elementNames.contains(elementName);
    }

    @Override
    public Collection<String> getElementNames() {
        return this.elementNames;
    }

    @Override
    public void removeElementName(String elementName) {
        this.elementNames.remove(elementName);
        fireRemovedElementName(elementName);
    }

    /**
     * notify all listeners, that an elementName has been added
     * 
     * @param elementName the elementName that has been added
     */
    private void fireAddedElementName(String elementName) {
        for (MarkedElementsManagerListener listener : listeners) {
            listener.addedElementName(elementName);
        }
    }

    /**
     * notifies all listeners, that an elemntNames has been removed
     * 
     * @param elementName the name of the element that has beeen removed.
     */
    private void fireRemovedElementName(String elementName) {
        for (MarkedElementsManagerListener listener : listeners) {
            listener.removedElementName(elementName);
        }
    }

    @Override
    public void addListener(MarkedElementsManagerListener listener) {
        this.listeners.add(listener);
    }

    @Override
    public void removeListener(MarkedElementsManagerListener listener) {
        this.listeners.remove(listener);
    }

}