Java tutorial
/** * 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 org.deephacks.confit.model; import com.google.common.base.Function; import com.google.common.collect.Maps; import java.util.Collection; import java.util.Map; public class BeanUtils { public static final Map<BeanId, Bean> uniqueIndex(Collection<Bean> beans) { return Maps.uniqueIndex(beans, new Function<Bean, BeanId>() { @Override public BeanId apply(Bean input) { return input.getId(); } }); } }