/*
* $Id$
*
* SARL is an general-purpose agent programming language.
* More details on http://www.sarl.io
*
* Copyright (C) 2014-2017 the original authors or authors.
*
* 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.
*/
package io.janusproject.util;
import java.io.Serializable;
import java.util.AbstractCollection;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import io.janusproject.services.distributeddata.DMap;
import io.janusproject.services.distributeddata.DMapListener;
import io.janusproject.util.DataViewDelegate.Delegator;
/**
* A view on a standard Map that provides the API for DMap.
*
* <p>This class is not thread-safe.
*
* @param <K> type of the keys.
* @param <V> type of the values.
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
public abstract class AbstractDMapView<K, V> extends AbstractMapView<K, V> implements DMap<K, V>, Serializable, Delegator<Map<K, V>> {
private static final long serialVersionUID = -2836872682477402816L;
private final String name;
/**
* @param name
* - the name of the map.
*/
public AbstractDMapView(String name) {
this.name = name;
}
@Override
public boolean isBackedCollection() {
return true;
}
@Override
public String getName() {
return this.name;
}
@Override
public boolean equals(Object obj) {
return getDelegatedObject().equals(DataViewDelegate.undelegate(obj));
}
@Override
public int hashCode() {
return getDelegatedObject().hashCode();
}
@Override
public String toString() {
return getDelegatedObject().toString();
}
@Override
public boolean containsKey(Object key) {
return getDelegatedObject().containsKey(key);
}
@Override
public boolean containsValue(Object value) {
return getDelegatedObject().containsValue(value);
}
@Override
public V get(Object key) {
return getDelegatedObject().get(key);
}
@Override
public boolean isEmpty() {
return getDelegatedObject().isEmpty();
}
@Override
public int size() {
return getDelegatedObject().size();
}
@Override
public Set<Entry<K, V>> entrySet() {
return new EntryView(getDelegatedObject().entrySet());
}
@Override
public Set<K> keySet() {
return new KeyView(getDelegatedObject().entrySet());
}
@Override
public Collection<V> values() {
return new ValueView(getDelegatedObject().entrySet());
}
@Override
public void clear() {
if (!getDelegatedObject().isEmpty()) {
getDelegatedObject().clear();
fireCleared(false);
}
}
@Override
public V put(K key, V value) {
final V old = getDelegatedObject().put(key, value);
if (old != null) {
fireEntryUpdated(key, value);
} else {
fireEntryAdded(key, value);
}
return old;
}
@Override
public void putAll(Map<? extends K, ? extends V> map) {
for (final Entry<? extends K, ? extends V> entry : map.entrySet()) {
put(entry.getKey(), entry.getValue());
}
}
@SuppressWarnings("unchecked")
@Override
public V remove(Object key) {
final V old = getDelegatedObject().remove(key);
if (old != null) {
fireEntryRemoved((K) key, old);
}
return old;
}
@Override
public V putIfAbsent(K key, V value) {
if (!getDelegatedObject().containsKey(key)) {
final V old = getDelegatedObject().put(key, value);
fireEntryAdded(key, value);
return old;
}
return getDelegatedObject().get(key);
}
/**
* A view on a Set of entries that is able to fire the events for the {@link DMapListener listeners}.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
protected class EntryView extends AbstractSet<Entry<K, V>> implements Serializable, Delegator<Set<Entry<K, V>>> {
private static final long serialVersionUID = 7929741824792802767L;
private final Set<Entry<K, V>> entries;
/**
* @param data
* - the set.
*/
public EntryView(Set<Entry<K, V>> data) {
this.entries = data;
}
@Override
public Set<Entry<K, V>> getDelegatedObject() {
return this.entries;
}
@Override
public boolean equals(Object obj) {
return getDelegatedObject().equals(DataViewDelegate.undelegate(obj));
}
@Override
public int hashCode() {
return getDelegatedObject().hashCode();
}
@Override
public String toString() {
return getDelegatedObject().toString();
}
@Override
public Iterator<Entry<K, V>> iterator() {
return new EntryIterator(this.entries.iterator());
}
@Override
public int size() {
return this.entries.size();
}
/**
* Iterator on DMap entries.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
private class EntryIterator implements Iterator<Entry<K, V>> {
private final Iterator<Entry<K, V>> iterator;
private K key;
private V value;
EntryIterator(Iterator<Entry<K, V>> iterator) {
this.iterator = iterator;
}
@Override
public boolean hasNext() {
return this.iterator.hasNext();
}
@Override
public Entry<K, V> next() {
final Entry<K, V> entry = this.iterator.next();
this.key = entry.getKey();
this.value = entry.getValue();
return entry;
}
@Override
public void remove() {
this.iterator.remove();
fireEntryRemoved(this.key, this.value);
}
}
}
/**
* A view on a Set of keys that is able to fire the events for the {@link DMapListener listeners}.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
protected class KeyView extends AbstractSet<K> implements Serializable, Delegator<Set<K>> {
private static final long serialVersionUID = -1182559049456023451L;
private final Set<Entry<K, V>> entries;
/**
* @param data
* - the set.
*/
public KeyView(Set<Entry<K, V>> data) {
this.entries = data;
}
@Override
public Set<K> getDelegatedObject() {
return AbstractDMapView.this.getDelegatedObject().keySet();
}
@Override
public boolean equals(Object obj) {
return getDelegatedObject().equals(DataViewDelegate.undelegate(obj));
}
@Override
public int hashCode() {
return getDelegatedObject().hashCode();
}
@Override
public String toString() {
return getDelegatedObject().toString();
}
@Override
public Iterator<K> iterator() {
return new KeyIterator(this.entries.iterator());
}
@Override
public int size() {
return this.entries.size();
}
/**
* Iterator on DMap keys.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
private class KeyIterator implements Iterator<K> {
private final Iterator<Entry<K, V>> iterator;
private K key;
private V value;
KeyIterator(Iterator<Entry<K, V>> iterator) {
this.iterator = iterator;
}
@Override
public boolean hasNext() {
return this.iterator.hasNext();
}
@Override
public K next() {
final Entry<K, V> entry = this.iterator.next();
this.key = entry.getKey();
this.value = entry.getValue();
return this.key;
}
@Override
public void remove() {
this.iterator.remove();
fireEntryRemoved(this.key, this.value);
}
}
}
/**
* A view on a Collection of keys that is able to fire the events for the {@link DMapListener listeners}.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
protected class ValueView extends AbstractCollection<V> implements Serializable, Delegator<Collection<V>> {
private static final long serialVersionUID = -5603710938557144864L;
private final Set<Entry<K, V>> entries;
/**
* @param data
* - the set.
*/
public ValueView(Set<Entry<K, V>> data) {
this.entries = data;
}
@Override
public Collection<V> getDelegatedObject() {
return AbstractDMapView.this.getDelegatedObject().values();
}
@Override
public boolean equals(Object obj) {
return getDelegatedObject().equals(DataViewDelegate.undelegate(obj));
}
@Override
public int hashCode() {
return getDelegatedObject().hashCode();
}
@Override
public String toString() {
return getDelegatedObject().toString();
}
@Override
public Iterator<V> iterator() {
return new ValueIterator(this.entries.iterator());
}
@Override
public int size() {
return this.entries.size();
}
/**
* Iterator on DMap values.
*
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
private class ValueIterator implements Iterator<V> {
private final Iterator<Entry<K, V>> iterator;
private K key;
private V value;
ValueIterator(Iterator<Entry<K, V>> iterator) {
this.iterator = iterator;
}
@Override
public boolean hasNext() {
return this.iterator.hasNext();
}
@Override
public V next() {
final Entry<K, V> entry = this.iterator.next();
this.key = entry.getKey();
this.value = entry.getValue();
return this.value;
}
@Override
public void remove() {
this.iterator.remove();
fireEntryRemoved(this.key, this.value);
}
}
}
}