Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.jclouds.cloudstack.functions; import static com.google.common.base.Preconditions.checkNotNull; import java.util.Map; import javax.inject.Singleton; import org.jclouds.http.HttpResponse; import com.google.common.base.Function; import com.google.common.collect.Iterables; import com.google.inject.Inject; /** * * @author Adrian Cole */ @Singleton public class ParseIdToNameEntryFromHttpResponse implements Function<HttpResponse, Map.Entry<String, String>> { private final ParseIdToNameFromHttpResponse parser; @Inject public ParseIdToNameEntryFromHttpResponse(ParseIdToNameFromHttpResponse parser) { this.parser = checkNotNull(parser, "parser"); } public Map.Entry<String, String> apply(HttpResponse response) { checkNotNull(response, "response"); Map<String, String> toParse = parser.apply(response); checkNotNull(toParse, "parsed result from %s", response); return Iterables.getFirst(toParse.entrySet(), null); } }