org.ocpsoft.rewrite.util.Maps Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rewrite-api Show documentation

There is a newer version: 10.0.2.Final

/*
 * Copyright 2011 Lincoln Baxter, III
 * 
 * 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.ocpsoft.rewrite.util;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * @author Lincoln Baxter, III
 * 
 */
public class Maps
{
   @SuppressWarnings("unchecked")
   public static  void addListValue(final Map> map, final K key, final T value)
   {
      if (!map.containsKey(key))
      {
         map.put(key, new ArrayList(Arrays.asList(value)));
      }
      else
      {
         map.get(key).add(value);
      }
   }

   public static  void addArrayValue(final Map map, final T key, final String value)
   {
      if (!map.containsKey(key))
      {
         map.put(key, Arrays.asList(value).toArray(new String[] {}));
      }
      else
      {
         String[] values = map.get(key);
         List list = new ArrayList(Arrays.asList(values));
         list.add(value);
         map.put(key, list.toArray(new String[] {}));
      }
   }

   public static  T getListValue(final Map> values, final String name, final int index)
   {
      List list = values.get(name);
      if ((list != null) && !list.isEmpty())
      {
         T item = list.get(index);
         return item;
      }
      return null;
   }

   public static Map toArrayMap(final Map> parameterMap)
   {
      Map result = new LinkedHashMap();

      for (Entry> entry : parameterMap.entrySet())
      {
         for (String value : entry.getValue())
         {
            addArrayValue(result, entry.getKey(), value);
         }
      }
      return result;
   }
}