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

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Here is the source code for org.jclouds.elasticstack.functions.ListOfKeyValuesDelimitedByBlankLinesToListOfMaps.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.List;
import java.util.Map;

import javax.inject.Singleton;

import com.google.common.base.Function;
import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

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

    @Override
    public List<Map<String, String>> apply(String from) {
        List<Map<String, String>> maps = Lists.newArrayList();
        for (String listOfKeyValues : Splitter.on("\n\n").split(from)) {
            if (!"".equals(listOfKeyValues)) {
                Map<String, String> map = Maps.newLinkedHashMap();
                for (String keyValueLine : Splitter.on('\n').split(listOfKeyValues)) {
                    if (!"".equals(keyValueLine)) {
                        int firstIndex = keyValueLine.indexOf(' ');
                        if (firstIndex != -1) {
                            String key = keyValueLine.substring(0, firstIndex);
                            String value = keyValueLine.substring(firstIndex + 1).replace("\\n", "\n");
                            map.put(key, value);
                        }
                    }
                }
                if (map.size() != 0)
                    maps.add(map);
            }
        }
        return maps;
    }
}