/*

 * Copyright (c) 2011, 2012, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.apple.laf;

import java.beans.*;

import java.util.*;

import javax.swing.JComponent;

public class ClientPropertyApplicator<T extends JComponent, N> implements PropertyChangeListener {

    private final Map<String, Property<N>> properties = new HashMap<String, Property<N>>();

    public ClientPropertyApplicator(final Property<N>... propertyList) {

        for (final Property<N> p : propertyList) {

            properties.put(p.name, p);

        }

    }

    void applyProperty(final N target, final String propName, final Object value) {

        final Property<N> property = properties.get(propName);

        if (property != null) {

            property.applyProperty(target, value);

        }

    }

    public void attachAndApplyClientProperties(final T target) {

        target.addPropertyChangeListener(this);

        final N obj = convertJComponentToTarget(target);

        if (obj == null) {

            return;

        }

        final Set<String> propNames = properties.keySet();

        for (final String propName : propNames) {

            final Object value = target.getClientProperty(propName);

            if (value == null) {

                continue;

            }

            applyProperty(obj, propName, value);

        }

    }

    public void removeFrom(final T target) {

        target.removePropertyChangeListener(this);

    }

    @Override

    @SuppressWarnings("unchecked")

    public void propertyChange(final PropertyChangeEvent evt) {

        final N obj = convertJComponentToTarget((T)evt.getSource());

        if (obj == null) return;

        applyProperty(obj, evt.getPropertyName(), evt.getNewValue());

    }

    @SuppressWarnings("unchecked")

    public N convertJComponentToTarget(final T component) {

        return (N)component; // naive implementation

    }

    public abstract static class Property<X> {

        final String name;

        public Property(final String name) {

            this.name = name;

        }

        public abstract void applyProperty(final X target, final Object value);

    }

}