Clover coverage report - Code Coverage for hivemind release 1.0
Coverage timestamp: Wed Sep 22 2004 08:05:25 EDT
file stats: LOC: 177   Methods: 9
NCLOC: 105   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
MessagesImpl.java 88.9% 93.3% 100% 93.1%
coverage coverage
 1   
 //  Copyright 2004 The Apache Software Foundation
 2   
 //
 3   
 // Licensed under the Apache License, Version 2.0 (the "License");
 4   
 // you may not use this file except in compliance with the License.
 5   
 // You may obtain a copy of the License at
 6   
 //
 7   
 //     http://www.apache.org/licenses/LICENSE-2.0
 8   
 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
 11   
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12   
 // See the License for the specific language governing permissions and
 13   
 // limitations under the License.
 14   
 
 15   
 package org.apache.hivemind.impl;
 16   
 
 17   
 import java.io.IOException;
 18   
 import java.io.InputStream;
 19   
 import java.net.URL;
 20   
 import java.text.MessageFormat;
 21   
 import java.util.ArrayList;
 22   
 import java.util.List;
 23   
 import java.util.Locale;
 24   
 import java.util.Properties;
 25   
 
 26   
 import org.apache.commons.logging.Log;
 27   
 import org.apache.commons.logging.LogFactory;
 28   
 import org.apache.hivemind.ApplicationRuntimeException;
 29   
 import org.apache.hivemind.HiveMind;
 30   
 import org.apache.hivemind.Messages;
 31   
 import org.apache.hivemind.Resource;
 32   
 import org.apache.hivemind.util.LocalizedNameGenerator;
 33   
 
 34   
 /**
 35   
  * Implementation of {@link org.apache.hivemind.Messages} for
 36   
  * a {@link org.apache.hivemind.internal.Module}.
 37   
  * 
 38   
  * TODO: Refactor this and {@link org.apache.hivemind.impl.MessageFormatter} into
 39   
  * common base classes.
 40   
  *
 41   
  * @author Howard Lewis Ship
 42   
  */
 43   
 public final class MessagesImpl implements Messages
 44   
 {
 45   
     private static final Log LOG = LogFactory.getLog(MessagesImpl.class);
 46   
 
 47   
     private Properties _properties;
 48   
     private Locale _locale;
 49   
 
 50  18
     public MessagesImpl(Resource moduleLocation, Locale locale)
 51   
     {
 52  18
         _locale = locale;
 53   
 
 54  18
         initialize(moduleLocation);
 55   
     }
 56   
 
 57  18
     private void initialize(Resource moduleLocation)
 58   
     {
 59  18
         if (LOG.isDebugEnabled())
 60  0
             LOG.debug("Reading message properties for module at " + moduleLocation);
 61   
 
 62  18
         String descriptorName = moduleLocation.getName();
 63  18
         int dotx = descriptorName.lastIndexOf('.');
 64  18
         String baseName = descriptorName.substring(0, dotx);
 65   
 
 66  18
         LocalizedNameGenerator g = new LocalizedNameGenerator(baseName, _locale, ".properties");
 67  18
         List urls = new ArrayList();
 68   
 
 69  18
         while (g.more())
 70   
         {
 71  45
             String name = g.next();
 72  45
             Resource l = moduleLocation.getRelativeResource(name);
 73  45
             URL url = l.getResourceURL();
 74   
 
 75  45
             if (url != null)
 76  14
                 urls.add(url);
 77   
         }
 78   
 
 79   
         // Now read an assemble them, least specific to most specific.
 80   
         // More specific keys overwrite less specific keys.
 81   
 
 82  18
         int count = urls.size();
 83   
 
 84  18
         _properties = new Properties();
 85   
 
 86  18
         for (int i = count - 1; i >= 0; i--)
 87   
         {
 88  14
             URL url = (URL) urls.get(i);
 89   
 
 90  14
             if (LOG.isDebugEnabled())
 91  0
                 LOG.debug("Reading message properties from " + url);
 92   
 
 93  14
             try
 94   
             {
 95  14
                 InputStream stream = url.openStream();
 96   
 
 97  14
                 _properties.load(stream);
 98   
 
 99  14
                 stream.close();
 100   
             }
 101   
             catch (IOException ex)
 102   
             {
 103  0
                 throw new ApplicationRuntimeException(ImplMessages.unabelToReadMessages(url), ex);
 104   
             }
 105   
         }
 106   
 
 107   
     }
 108   
 
 109  13
     public String getMessage(String key)
 110   
     {
 111  13
         String result = _properties.getProperty(key);
 112   
 
 113  13
         if (result == null)
 114  2
             result = "[" + key.toUpperCase() + "]";
 115   
 
 116   
         // Reasons not to write the result back in as a new property:
 117   
         // 1) This is a developer error that should be resolved before an app goes into production
 118   
         // 2) Would have to synchronize getMessage() methods
 119   
         // 3) Would screw up #getMessage(String, String)
 120   
 
 121  13
         return result;
 122   
     }
 123   
 
 124  2
     public String getMessage(String key, String defaultValue)
 125   
     {
 126  2
         return _properties.getProperty(key, defaultValue);
 127   
     }
 128   
 
 129  6
     public String format(String key, Object[] args)
 130   
     {
 131  6
         String pattern = getMessage(key);
 132   
 
 133  6
         for (int i = 0; i < args.length; i++)
 134   
         {
 135  12
             Object arg = args[i];
 136   
 
 137  12
             if (arg != null && arg instanceof Throwable)
 138  2
                 args[i] = extractMessage((Throwable) arg);
 139   
         }
 140   
 
 141   
         // This ugliness is mandated for JDK 1.3 compatibility, which has a bug 
 142   
         // in MessageFormat ... the
 143   
         // pattern is applied in the constructor, using the system default Locale,
 144   
         // regardless of what locale is later specified!
 145   
         // It appears that the problem does not exist in JDK 1.4.
 146   
 
 147  6
         MessageFormat messageFormat = new MessageFormat("");
 148  6
         messageFormat.setLocale(_locale);
 149  6
         messageFormat.applyPattern(pattern);
 150   
 
 151  6
         return messageFormat.format(args);
 152   
     }
 153   
 
 154  2
     private String extractMessage(Throwable t)
 155   
     {
 156  2
         String message = t.getMessage();
 157   
 
 158  2
         return HiveMind.isNonBlank(message) ? message : t.getClass().getName();
 159   
     }
 160   
 
 161  3
     public String format(String key, Object arg0)
 162   
     {
 163  3
         return format(key, new Object[] { arg0 });
 164   
     }
 165   
 
 166  1
     public String format(String key, Object arg0, Object arg1)
 167   
     {
 168  1
         return format(key, new Object[] { arg0, arg1 });
 169   
     }
 170   
 
 171  1
     public String format(String key, Object arg0, Object arg1, Object arg2)
 172   
     {
 173  1
         return format(key, new Object[] { arg0, arg1, arg2 });
 174   
     }
 175   
 
 176   
 }
 177