com.phloc.commons.convert.UnidirectionalConverterPairFirst Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* 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.phloc.commons.convert;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.phloc.commons.collections.pair.IReadonlyPair;
/**
* A unidirectional converter that extracts the first element from an
* {@link IReadonlyPair}.
*
* @author Philip Helger
*/
public final class UnidirectionalConverterPairFirst implements
IUnidirectionalConverter , DATA1TYPE>
{
@Nullable
public DATA1TYPE convert (@Nullable final IReadonlyPair aPair)
{
return aPair == null ? null : aPair.getFirst ();
}
/**
* Get a generic data converter that extracts the first element out of a pair.
*
* @param
* First type of the pair
* @param
* Second type of the pair.
* @return The data converter capable of extracting the first item out of a
* pair.
*/
@Nonnull
public static UnidirectionalConverterPairFirst create ()
{
return new UnidirectionalConverterPairFirst ();
}
}