001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.hadoop.lib.wsrs;
019    
020    import org.apache.hadoop.classification.InterfaceAudience;
021    
022    import java.util.Map;
023    
024    /**
025     * Class that contains all parsed JAX-RS parameters.
026     * <p/>
027     * Instances are created by the {@link ParametersProvider} class.
028     */
029    @InterfaceAudience.Private
030    public class Parameters {
031      private Map<String, Param<?>> params;
032    
033      /**
034       * Constructor that receives the request parsed parameters.
035       *
036       * @param params the request parsed parameters.
037       */
038      public Parameters(Map<String, Param<?>> params) {
039        this.params = params;
040      }
041    
042      /**
043       * Returns the value of a request parsed parameter.
044       *
045       * @param name parameter name.
046       * @param klass class of the parameter, used for value casting.
047      * @return the value of the parameter.
048       */
049      @SuppressWarnings("unchecked")
050      public <V, T extends Param<V>> V get(String name, Class<T> klass) {
051        return ((T)params.get(name)).value();
052      }
053      
054    }