gnu.trove.map.TMap Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of trove4j Show documentation
The Trove library provides high speed regular and primitive collections for Java.
There is a newer version: 3.0.3
///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2011, Rob Eden All Rights Reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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 for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
///////////////////////////////////////////////////////////////////////////////

package gnu.trove.map;

import gnu.trove.function.TObjectFunction;
import gnu.trove.procedure.TObjectObjectProcedure;
import gnu.trove.procedure.TObjectProcedure;

import java.util.Map;


/**
 * Interface extension to {@link Map} which adds Trove-specific features.
 */
public interface TMap extends Map {

    /**
     * Inserts a key/value pair into the map if the specified key is not already
     * associated with a value.
     *
     * @param key   an Object value
     * @param value an Object value
     * @return the previous value associated with key,
     *         or {@code null} if none was found.
     */
    public V putIfAbsent(K key, V value);


    /**
     * Executes procedure for each key in the map.
     *
     * @param procedure a TObjectProcedure value
     * @return false if the loop over the keys terminated because
     *         the procedure returned false for some key.
     */
    public boolean forEachKey(TObjectProcedure procedure);


    /**
     * Executes procedure for each value in the map.
     *
     * @param procedure a TObjectProcedure value
     * @return false if the loop over the values terminated because
     *         the procedure returned false for some value.
     */
    public boolean forEachValue(TObjectProcedure procedure);


    /**
     * Executes procedure for each key/value entry in the
     * map.
     *
     * @param procedure a TObjectObjectProcedure value
     * @return false if the loop over the entries terminated because
     *         the procedure returned false for some entry.
     */
    @SuppressWarnings({"unchecked"})
    public boolean forEachEntry(TObjectObjectProcedure procedure);


    /**
     * Retains only those entries in the map for which the procedure
     * returns a true value.
     *
     * @param procedure determines which entries to keep
     * @return true if the map was modified.
     */
    @SuppressWarnings({"unchecked"})
    public boolean retainEntries(TObjectObjectProcedure procedure);


    /**
     * Transform the values in this map using function.
     *
     * @param function a TObjectFunction value
     */
    public void transformValues(TObjectFunction function);
}