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/*
 * #%L
 * fujion
 * %%
 * Copyright (C) 2008 - 2017 Regenstrief Institute, Inc.
 * %%
 * 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.
 *
 * #L%
 */
package org.fujion.model;

import java.util.Observable;

/**
 * Base class for creating observable models for data binding.
 */
public class ObservableModel extends Observable {

    private boolean updating;

    /**
     * Notify observers of a property change. Protects against update loops.
     *
     * @param propertyName Name of the property that changed.
     */
    protected void propertyChanged(String propertyName) {
        if (!updating) {
            try {
                updating = true;
                setChanged();
                notifyObservers(propertyName);
            } finally {
                updating = false;
            }
        }
    }

}