content: /*
   * 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.apache.chemistry.opencmis.commons.spi;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Holder for IN/OUT parameters that can hold extra values.
   */
  public class ExtendedHolder<T> extends Holder<T> {
  
      private Map<String, Object> extraValues = new HashMap<String, Object>();
  
      /**
       * Constructs a holder with a {@code null} value.
       */
      public ExtendedHolder() {
          super();
      }
  
      /**
       * Constructs a holder with the given value.
       */
      public ExtendedHolder(T value) {
          super(value);
      }
  
      /**
       * Sets an extra value.
       * 
       * @param name
       *            the name of the value
       * @param value
       *            the value
       */
      public void setExtraValue(String name, Object value) {
          extraValues.put(name, value);
      }
  
      /**
       * Gets an extra value,
       * 
       * @param name
       *            the name of the value
       * @return the value or {@code null} if a value with the given name doesn't
       *         exist
       */
      public Object getExtraValue(String name) {
          return extraValues.get(name);
      }
  
      @Override
      public String toString() {
          return "ExtendedHolder(" + getValue() + ", " + extraValues.toString() + ")";
      }
  }
  