Coverage Report - com.allanbank.mongodb.client.callback.ReplyIntegerCallback
 
Classes in this File Line Coverage Branch Coverage Complexity
ReplyIntegerCallback
100%
21/21
100%
8/8
2.25
 
 1  
 /*
 2  
  * #%L
 3  
  * ReplyIntegerCallback.java - mongodb-async-driver - Allanbank Consulting, Inc.
 4  
  * %%
 5  
  * Copyright (C) 2011 - 2014 Allanbank Consulting, Inc.
 6  
  * %%
 7  
  * Licensed under the Apache License, Version 2.0 (the "License");
 8  
  * you may not use this file except in compliance with the License.
 9  
  * You may obtain a copy of the License at
 10  
  * 
 11  
  *      http://www.apache.org/licenses/LICENSE-2.0
 12  
  * 
 13  
  * Unless required by applicable law or agreed to in writing, software
 14  
  * distributed under the License is distributed on an "AS IS" BASIS,
 15  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 16  
  * See the License for the specific language governing permissions and
 17  
  * limitations under the License.
 18  
  * #L%
 19  
  */
 20  
 
 21  
 package com.allanbank.mongodb.client.callback;
 22  
 
 23  
 import java.util.List;
 24  
 
 25  
 import com.allanbank.mongodb.Callback;
 26  
 import com.allanbank.mongodb.MongoDbException;
 27  
 import com.allanbank.mongodb.bson.Document;
 28  
 import com.allanbank.mongodb.bson.Element;
 29  
 import com.allanbank.mongodb.bson.NumericElement;
 30  
 import com.allanbank.mongodb.client.message.Reply;
 31  
 import com.allanbank.mongodb.error.ReplyException;
 32  
 
 33  
 /**
 34  
  * Callback to expect and extract a single document from the reply and then
 35  
  * extract a contained {@link NumericElement} and coerce it to a integer value.
 36  
  * 
 37  
  * @api.no This class is <b>NOT</b> part of the drivers API. This class may be
 38  
  *         mutated in incompatible ways between any two releases of the driver.
 39  
  * @copyright 2012-2013, Allanbank Consulting, Inc., All Rights Reserved
 40  
  */
 41  27
 public class ReplyIntegerCallback extends AbstractReplyCallback<Integer> {
 42  
 
 43  
     /** The default name for the long value to return. */
 44  
     public static final String DEFAULT_NAME = "n";
 45  
 
 46  
     /**
 47  
      * The name of the {@link NumericElement value} expected in the reply
 48  
      * document.
 49  
      */
 50  
     private final String myName;
 51  
 
 52  
     /**
 53  
      * Create a new ReplyIntegerCallback.
 54  
      * 
 55  
      * @param results
 56  
      *            The callback to notify of the 'n' value.
 57  
      */
 58  
     public ReplyIntegerCallback(final Callback<Integer> results) {
 59  44
         this(DEFAULT_NAME, results);
 60  44
     }
 61  
 
 62  
     /**
 63  
      * Create a new ReplyIntegerCallback.
 64  
      * 
 65  
      * @param name
 66  
      *            The name of the {@link NumericElement numeric} value.
 67  
      * @param results
 68  
      *            The callback to notify of the 'n' value.
 69  
      */
 70  
     public ReplyIntegerCallback(final String name,
 71  
             final Callback<Integer> results) {
 72  48
         super(results);
 73  
 
 74  48
         myName = name;
 75  48
     }
 76  
 
 77  
     /**
 78  
      * {@inheritDoc}
 79  
      * <p>
 80  
      * Creates an exception from the {@link Reply} if the 'n' field is missing.
 81  
      * </p>
 82  
      * 
 83  
      * @param reply
 84  
      *            The raw reply.
 85  
      * @return The exception created.
 86  
      */
 87  
     @Override
 88  
     protected MongoDbException asError(final Reply reply) {
 89  31
         MongoDbException error = super.asError(reply);
 90  31
         if (error == null) {
 91  30
             final List<Document> results = reply.getResults();
 92  30
             if (results.size() == 1) {
 93  29
                 final Document doc = results.get(0);
 94  29
                 final Element nElem = doc.get(myName);
 95  29
                 if (toInt(nElem) < 0) {
 96  1
                     error = new ReplyException(reply, "Missing '" + myName
 97  
                             + "' field in reply.");
 98  
                 }
 99  
             }
 100  
         }
 101  31
         return error;
 102  
     }
 103  
 
 104  
     /**
 105  
      * {@inheritDoc}
 106  
      * <p>
 107  
      * Overridden to return the 'n' field in the reply document.
 108  
      * </p>
 109  
      * 
 110  
      * @see AbstractReplyCallback#convert(Reply)
 111  
      */
 112  
     @Override
 113  
     protected Integer convert(final Reply reply) throws MongoDbException {
 114  29
         final List<Document> results = reply.getResults();
 115  29
         if (results.size() == 1) {
 116  28
             final Document doc = results.get(0);
 117  28
             final Element nElem = doc.get(myName);
 118  28
             return Integer.valueOf(toInt(nElem));
 119  
         }
 120  
 
 121  1
         return Integer.valueOf(-1);
 122  
     }
 123  
 }