org.jclouds.elasticstack.functions.ListOfMapsToListOfKeyValuesDelimitedByBlankLines.java Source code

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Here is the source code for org.jclouds.elasticstack.functions.ListOfMapsToListOfKeyValuesDelimitedByBlankLines.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.elasticstack.functions;

import java.util.Map;

import javax.inject.Singleton;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class ListOfMapsToListOfKeyValuesDelimitedByBlankLines
        implements Function<Iterable<Map<String, String>>, String> {

    @Override
    public String apply(Iterable<Map<String, String>> from) {
        return Joiner.on("\n\n").join(Iterables.transform(from, new Function<Map<String, String>, String>() {

            @Override
            public String apply(Map<String, String> from) {
                return Joiner.on('\n').withKeyValueSeparator(" ")
                        .join(Maps.transformValues(from, new Function<String, String>() {

                            @Override
                            public String apply(String from) {
                                return from.replace("\n", "\\n");
                            }

                        }));
            }

        }));
    }
}