/*******************************************************************************
* Copyright 2015 Analog Devices, Inc.
*
* 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.analog.lyric.dimple.data;
import java.util.Map;
import java.util.Objects;
import org.eclipse.jdt.annotation.Nullable;
import com.analog.lyric.dimple.model.core.IFactorGraphChild;
import net.jcip.annotations.Immutable;
/**
*
* @since 0.08
* @author Christopher Barber
*/
@Immutable
public class DataEntry<K extends IFactorGraphChild, T extends IDatum> implements Map.Entry<K, T>
{
/*-------
* State
*/
private final K _key;
private final @Nullable T _value;
/*--------------
* Construction
*/
public DataEntry(K key, @Nullable T value)
{
_key = key;
_value = value;
}
/*----------------
* Object methods
*/
@Override
public boolean equals(@Nullable Object obj)
{
if (obj == this)
{
return true;
}
if (obj instanceof Map.Entry)
{
final Map.Entry<?, ?> entry = (Map.Entry<?,?>)obj;
return _key == entry.getKey() && Objects.equals(_value, entry.getValue());
}
return false;
}
@Override
public int hashCode()
{
return _key.hashCode() ^ Objects.hashCode(_value);
}
/*---------------
* Entry methods
*/
@Override
public K getKey()
{
return _key;
}
@Override
public @Nullable T getValue()
{
return _value;
}
@Override
public T setValue(@Nullable T value) throws UnsupportedOperationException
{
throw new UnsupportedOperationException("setValue");
}
}