MappingFinder.java
/*
* *********************************************************************************************************************
*
* blueMarine II: Semantic Media Centre
* http://tidalwave.it/projects/bluemarine2
*
* Copyright (C) 2015 - 2021 by Tidalwave s.a.s. (http://tidalwave.it)
*
* *********************************************************************************************************************
*
* 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.
*
* *********************************************************************************************************************
*
* git clone https://bitbucket.org/tidalwave/bluemarine2-src
* git clone https://github.com/tidalwave-it/bluemarine2-src
*
* *********************************************************************************************************************
*/
package it.tidalwave.util;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;
import java.util.List;
import java.util.function.Function;
import static java.util.stream.Collectors.toList;
/***********************************************************************************************************************
*
* A {@link Finder} which retrieve results from another instance applying a {@link Function}.
*
* @author Fabrizio Giudici
*
**********************************************************************************************************************/
@Immutable
public class MappingFinder<TYPE> extends SupplierBasedFinder<TYPE>
{
private static final long serialVersionUID = -6359683808082070089L;
@Nonnull
private final transient Function<TYPE, TYPE> mapper;
public MappingFinder (@Nonnull final Finder<TYPE> delegate, @Nonnull final Function<TYPE, TYPE> mapper)
{
super(delegate::results);
this.mapper = mapper;
}
public MappingFinder (@Nonnull final MappingFinder other, @Nonnull final Object override)
{
super(other, override);
final MappingFinder<TYPE> source = getSource(MappingFinder.class, other, override);
this.mapper = source.mapper;
}
@Override @Nonnull
protected List<? extends TYPE> computeResults()
{
return super.computeResults().stream().map(mapper).collect(toList());
}
}