de.dhke.projects.cutil.collections.aspect.AspectMap.java Source code

Introduction

Here is the source code for de.dhke.projects.cutil.collections.aspect.AspectMap.java

Source

/**
 * (c) 2009-2014 Peter Wullinger
 *
 * $Id$
 *
 * Use, modification and restribution of this file are covered by the
 * terms of the Artistic License 2.0.
 *
 * You should have received a copy of the license terms in a file named
 * "LICENSE" together with this software package.
 *
 * Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
 * HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
 * A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE
 * EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO
 * COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT
 * OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 **/
package de.dhke.projects.cutil.collections.aspect;

import de.dhke.projects.cutil.IDecorator;
import java.util.Collection;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.apache.commons.collections15.keyvalue.DefaultMapEntry;

/**
 *
 * @author Peter Wullinger <java@dhke.de>
 */
public class AspectMap<K, V, M extends Map<K, V>> extends AspectCollectionNotifier<Map.Entry<K, V>, Map<K, V>>
        implements Map<K, V>, IDecorator<M> {
    private final M _baseMap;

    @Deprecated
    protected AspectMap(final M baseMap) {
        _baseMap = baseMap;
    }

    protected AspectMap(final M baseMap, final Object sender) {
        super(sender);
        _baseMap = baseMap;
    }

    @Deprecated
    public static <K, V, M extends Map<K, V>> AspectMap<K, V, M> decorate(final M baseMap) {
        return new AspectMap<>(baseMap);
    }

    public static <K, V, M extends Map<K, V>> AspectMap<K, V, M> decorate(final M baseMap, final Object sender) {
        return new AspectMap<>(baseMap, sender);
    }

    @Override
    public M getDecoratee() {
        return _baseMap;
    }

    @Override
    public int size() {
        return _baseMap.size();
    }

    @Override
    public boolean isEmpty() {
        return _baseMap.isEmpty();
    }

    @Override
    public boolean containsKey(final Object key) {
        return _baseMap.containsKey(key);
    }

    @Override
    public boolean containsValue(final Object value) {
        return _baseMap.containsValue(value);
    }

    @Override
    public V get(final Object key) {
        return _baseMap.get(key);
    }

    @Override
    public V put(final K key, final V value) {
        if (containsKey(key)) {
            V oldValue = get(key);
            final DefaultMapEntry<K, V> oldEntry = new DefaultMapEntry<>(key, oldValue);
            final DefaultMapEntry<K, V> newEntry = new DefaultMapEntry<>(key, value);
            CollectionItemReplacedEvent<Map.Entry<K, V>, Map<K, V>> ev = new CollectionItemReplacedEvent<Map.Entry<K, V>, Map<K, V>>(
                    this, this, oldEntry, newEntry);
            notifyBeforeElementReplaced(ev);
            oldValue = _baseMap.put(key, value);
            notifyAfterElementReplaced(ev);
            return oldValue;
        } else {
            final DefaultMapEntry<K, V> newEntry = new DefaultMapEntry<>(key, value);
            CollectionItemEvent<Map.Entry<K, V>, Map<K, V>> ev = new CollectionItemEvent<Entry<K, V>, Map<K, V>>(
                    this, this, newEntry);
            notifyBeforeElementAdded(ev);
            V oldValue = _baseMap.put(key, value);
            notifyAfterElementAdded(ev);
            return oldValue;
        }
    }

    @Override
    public V remove(final Object key) {
        V value = get(key);
        boolean haveKey = _baseMap.containsKey(key);
        if (haveKey) {
            @SuppressWarnings("unchecked")
            DefaultMapEntry<K, V> entry = new DefaultMapEntry<>((K) key, value);
            CollectionItemEvent<Map.Entry<K, V>, Map<K, V>> ev = new CollectionItemEvent<Entry<K, V>, Map<K, V>>(
                    this, this, entry);
            notifyBeforeElementRemoved(ev);
            value = _baseMap.remove(key);
            if (haveKey)
                notifyAfterElementRemoved(ev);
        }
        return value;
    }

    @Override
    public void putAll(final Map<? extends K, ? extends V> m) {
        for (K key : m.keySet()) {
            V value = m.get(key);
            Map.Entry<K, V> newEntry = new DefaultMapEntry<>(key, value);
            if (containsKey(key)) {
                V oldValue = get(key);
                Map.Entry<K, V> oldEntry = new DefaultMapEntry<>(key, oldValue);
                notifyBeforeElementReplaced(this, oldEntry, newEntry);
            } else {
                notifyBeforeElementAdded(this, newEntry);
            }
        }

        for (K key : m.keySet()) {
            V value = m.get(key);
            Map.Entry<K, V> newEntry = new DefaultMapEntry<>(key, value);
            if (containsKey(key)) {
                _baseMap.put(key, value);
                V oldValue = get(key);
                Map.Entry<K, V> oldEntry = new DefaultMapEntry<>(key, oldValue);
                notifyAfterElementReplaced(this, oldEntry, newEntry);
            } else {
                _baseMap.put(key, value);
                notifyAfterElementAdded(this, newEntry);
            }
        }
    }

    @Override
    public void clear() {
        if (!isEmpty()) {
            CollectionEvent<Map.Entry<K, V>, Map<K, V>> ev = new CollectionEvent<Entry<K, V>, Map<K, V>>(this,
                    this);
            notifyBeforeCollectionCleared(ev);
            _baseMap.clear();
            notifyAfterCollectionCleared(ev);
        }
    }

    @Override
    public Set<K> keySet() {
        return new AspectMapKeySet<>(this);
    }

    @Override
    public Collection<V> values() {
        return new AspectMapValueCollection<>(this);
    }

    @Override
    public Set<Entry<K, V>> entrySet() {
        return new AspectMapEntrySet<>(this);
    }
}