org.jclouds.glesys.functions.ParseTemplatesFromHttpResponse.java Source code

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Here is the source code for org.jclouds.glesys.functions.ParseTemplatesFromHttpResponse.java

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/*
 * 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.glesys.functions;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Map;
import java.util.Set;

import javax.inject.Singleton;

import org.jclouds.glesys.domain.OSTemplate;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.functions.ParseFirstJsonValueNamed;
import org.jclouds.json.internal.GsonWrapper;

import com.google.common.base.Function;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.Iterables;
import com.google.inject.Inject;
import com.google.inject.TypeLiteral;

/**
 * @author Adrian Cole
 */
@Singleton
public class ParseTemplatesFromHttpResponse implements Function<HttpResponse, FluentIterable<OSTemplate>> {
    private final ParseFirstJsonValueNamed<Map<String, Set<OSTemplate>>> parser;

    @Inject
    public ParseTemplatesFromHttpResponse(GsonWrapper gsonView) {
        this.parser = new ParseFirstJsonValueNamed<Map<String, Set<OSTemplate>>>(checkNotNull(gsonView, "gsonView"),
                new TypeLiteral<Map<String, Set<OSTemplate>>>() {
                }, "templates");
    }

    public FluentIterable<OSTemplate> apply(HttpResponse response) {
        checkNotNull(response, "response");
        Map<String, Set<OSTemplate>> toParse = parser.apply(response);
        checkNotNull(toParse, "parsed result from %s", response);
        return FluentIterable.from(Iterables.concat(toParse.values()));
    }
}