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Shared libraries, common parent for both BIMserver and BimServerClientLib

There is a newer version: 2.0.0

package org.bimserver.utils;

/******************************************************************************
 * Copyright (C) 2009-2018  BIMserver.org
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see {@literal}.
 *****************************************************************************/

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class DoubleHashMap {
	private final Map ab;
	private final Map ba;

	public DoubleHashMap() {
		this(0);
	}
	
	public DoubleHashMap(int capacity) {
		ab = new HashMap(capacity);
		ba = new HashMap(capacity);
	}

	public void put(A a, B b) {
		ab.put(a, b);
		ba.put(b, a);
	}

	public boolean containsA(A a) {
		return ab.containsKey(a);
	}

	public boolean containsB(B b) {
		return ba.containsKey(b);
	}

	public B getB(A a) {
		return ab.get(a);
	}

	public A getA(B b) {
		return ba.get(b);
	}

	public Set keyASet() {
		return ab.keySet();
	}

	public Set keyBSet() {
		return ba.keySet();
	}
}