src/utils/IdealGraphVisualizer/Data/src/com/sun/hotspot/igv/data/ControllableChangedListener.java

/*
 * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package com.sun.hotspot.igv.data;

/**
 *
 * @author Thomas Wuerthinger
 */
public abstract class ControllableChangedListener<T> implements ChangedListener<T>{

    private boolean enabled;


    public ControllableChangedListener() {
        enabled = true;
    }

    public boolean isEnabled() {
        return enabled;
    }

    public void setEnabled(boolean b) {
        enabled = b;
    }

    @Override
    public void changed(T source) {
        if(enabled) {
            filteredChanged(source);
        }
    }

    public abstract void filteredChanged(T source);
}