/*******************************************************************************
* Copyright (c) 2016 Bruno Medeiros and other Contributors.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Bruno Medeiros - initial API and implementation
*******************************************************************************/
package melnorme.utilbox.collections;
import java.util.Map;
import java.util.Set;
/**
* A read-only view of a map, based on {@link Map}
*/
public interface MapAccess<K,V> extends Collection2<Map.Entry<K, V>> {
/** See {@link Map#containsKey(Object)} */
boolean containsKey(Object key);
/** See {@link Map#containsValue(Object)} */
boolean containsValue(Object value);
/** See {@link Map#get(Object)}*/
V get(Object key);
/** See {@link Map#getOrDefault(Object, Object)}*/
default V getOrDefault(Object key, V defaultValue) {
V v;
return (((v = get(key)) != null) || containsKey(key))
? v
: defaultValue;
}
/** See {@link Map#entrySet()}. WARNING: Clients must not modify this set. */
Set<Map.Entry<K, V>> entrySet();
/* ----------------- ----------------- */
/**
* @return a copy of this collection.
*/
public HashMap2<K, V> copyToHashMap();
}