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.mapreduce;
019    
020    import java.io.DataInput;
021    import java.io.DataOutput;
022    import java.io.IOException;
023    
024    import org.apache.hadoop.classification.InterfaceAudience;
025    import org.apache.hadoop.classification.InterfaceStability;
026    import org.apache.hadoop.io.Text;
027    import org.apache.hadoop.io.Writable;
028    import org.apache.hadoop.io.WritableUtils;
029    import org.apache.hadoop.util.StringInterner;
030    
031    /**
032     *  Class to encapsulate Queue ACLs for a particular
033     *  user.
034     * 
035     */
036    @InterfaceAudience.Public
037    @InterfaceStability.Evolving
038    public class QueueAclsInfo implements Writable {
039    
040      private String queueName;
041      private String[] operations;
042      /**
043       * Default constructor for QueueAclsInfo.
044       * 
045       */
046      public QueueAclsInfo() {
047        
048      }
049    
050      /**
051       * Construct a new QueueAclsInfo object using the queue name and the
052       * queue operations array
053       * 
054       * @param queueName Name of the job queue
055       * @param operations
056       */
057      public QueueAclsInfo(String queueName, String[] operations) {
058        this.queueName = queueName;
059        this.operations = operations;    
060      }
061    
062      /**
063       * Get queue name.
064       * 
065       * @return name
066       */
067      public String getQueueName() {
068        return queueName;
069      }
070    
071      protected void setQueueName(String queueName) {
072        this.queueName = queueName;
073      }
074    
075      /**
076       * Get opearations allowed on queue.
077       * 
078       * @return array of String
079       */
080      public String[] getOperations() {
081        return operations;
082      }
083    
084      @Override
085      public void readFields(DataInput in) throws IOException {
086        queueName = StringInterner.weakIntern(Text.readString(in));
087        operations = WritableUtils.readStringArray(in);
088      }
089    
090      @Override
091      public void write(DataOutput out) throws IOException {
092        Text.writeString(out, queueName);
093        WritableUtils.writeStringArray(out, operations);
094      }
095    }