com.exactpro.sf.common.util.SingleKeyHashMap Maven / Gradle / Ivy
/*******************************************************************************
* Copyright 2009-2019 Exactpro (Exactpro Systems Limited)
*
* 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 com.exactpro.sf.common.util;
import java.util.LinkedHashMap;
public class SingleKeyHashMap extends LinkedHashMap {
@Override
public V put(K key, V value) {
if (super.put(key, value) != null) {
throw new IllegalArgumentException("Duplicate key \"" + key + "\"");
}
return null;
}
}