Clover coverage report - groovy - 1.0-beta-6
Coverage timestamp: Thu Jul 15 2004 13:18:22 BST
file stats: LOC: 178   Methods: 4
NCLOC: 66   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
AbstractReaderSource.java 0% 0% 0% 0%
coverage
 1   
 /*
 2   
  $Id: AbstractReaderSource.java,v 1.1 2004/04/19 07:29:44 cpoirier Exp $
 3   
 
 4   
  Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
 5   
 
 6   
  Redistribution and use of this software and associated documentation
 7   
  ("Software"), with or without modification, are permitted provided
 8   
  that the following conditions are met:
 9   
 
 10   
  1. Redistributions of source code must retain copyright
 11   
     statements and notices.  Redistributions must also contain a
 12   
     copy of this document.
 13   
 
 14   
  2. Redistributions in binary form must reproduce the
 15   
     above copyright notice, this list of conditions and the
 16   
     following disclaimer in the documentation and/or other
 17   
     materials provided with the distribution.
 18   
 
 19   
  3. The name "groovy" must not be used to endorse or promote
 20   
     products derived from this Software without prior written
 21   
     permission of The Codehaus.  For written permission,
 22   
     please contact info@codehaus.org.
 23   
 
 24   
  4. Products derived from this Software may not be called "groovy"
 25   
     nor may "groovy" appear in their names without prior written
 26   
     permission of The Codehaus. "groovy" is a registered
 27   
     trademark of The Codehaus.
 28   
 
 29   
  5. Due credit should be given to The Codehaus -
 30   
     http://groovy.codehaus.org/
 31   
 
 32   
  THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
 33   
  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 34   
  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 35   
  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 36   
  THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 37   
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 38   
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 39   
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 40   
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 41   
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 42   
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 43   
  OF THE POSSIBILITY OF SUCH DAMAGE.
 44   
 
 45   
  */
 46   
 
 47   
 package org.codehaus.groovy.control.io;
 48   
 
 49   
 import java.io.BufferedReader;
 50   
 import java.io.IOException;
 51   
 
 52   
 import org.codehaus.groovy.control.CompilerConfiguration;
 53   
 import org.codehaus.groovy.control.Janitor;
 54   
 
 55   
 
 56   
 /**
 57   
  *  For ReaderSources that can choose a parent class, a base that
 58   
  *  provides common functionality.
 59   
  *
 60   
  *  @author <a href="mailto:cpoirier@dreaming.org">Chris Poirier</a>
 61   
  *
 62   
  *  @version $Id: AbstractReaderSource.java,v 1.1 2004/04/19 07:29:44 cpoirier Exp $
 63   
  */
 64   
 
 65   
 public abstract class AbstractReaderSource implements ReaderSource
 66   
 {
 67   
     protected CompilerConfiguration configuration;   // Configuration data
 68   
 
 69   
     
 70   
    /**
 71   
     *  Standard construction stuff.
 72   
     */
 73   
     
 74  0
     public AbstractReaderSource( CompilerConfiguration configuration )
 75   
     {
 76  0
         this.configuration = configuration;
 77   
     }
 78   
     
 79   
     
 80   
    /**
 81   
     *  Returns true if the source can be restarted (ie. if getReader()
 82   
     *  will return non-null on subsequent calls.
 83   
     */
 84   
     
 85  0
     public boolean canReopenSource()
 86   
     {
 87  0
         return true;
 88   
     }
 89   
     
 90   
     
 91   
     
 92   
   //---------------------------------------------------------------------------
 93   
   // LINE SUPPLY
 94   
 
 95   
     
 96   
     private BufferedReader lineSource = null;    // If set, a reader on the current source file
 97   
     private String         line       = null;    // The last line read from the current source file
 98   
     private int            number     = 0;       // The last line number read 
 99   
 
 100   
    
 101   
    /**
 102   
     *  Returns a line from the source, or null, if unavailable.  If
 103   
     *  you supply a Janitor, resources will be cached.
 104   
     */
 105   
     
 106  0
     public String getLine( int lineNumber, Janitor janitor )
 107   
     {
 108   
         //
 109   
         // If the source is already open and is passed the line we
 110   
         // want, close it.
 111   
         
 112  0
         if( lineSource != null && number > lineNumber )
 113   
         {
 114  0
             cleanup();
 115   
         }
 116   
     
 117   
         
 118   
         //
 119   
         // If the line source is closed, try to open it.
 120   
         
 121  0
         if( lineSource == null )
 122   
         {
 123  0
             try { lineSource = new BufferedReader( getReader() ); } catch( Exception e ) {}
 124  0
             number = 0;
 125   
         }
 126   
         
 127   
         
 128   
         //
 129   
         // Read until the appropriate line number.
 130   
 
 131  0
         if( lineSource != null )
 132   
         {
 133  0
             while( number < lineNumber )
 134   
             {
 135  0
                 try
 136   
                 {
 137  0
                     line = lineSource.readLine();
 138  0
                     number++;
 139   
                 }
 140   
                 catch( IOException e )
 141   
                 {
 142  0
                     cleanup();
 143   
                 }
 144   
             }
 145   
             
 146  0
             if( janitor == null )
 147   
             {
 148  0
                 cleanup();
 149   
             }
 150   
             else
 151   
             {
 152  0
                 janitor.register( this );
 153   
             }
 154   
         }
 155   
         
 156  0
         return line; 
 157   
     }
 158   
     
 159   
     
 160   
     
 161   
    /**
 162   
     *  Cleans up any cached resources used by getLine().
 163   
     */
 164   
     
 165  0
     public void cleanup()
 166   
     {
 167  0
         if( lineSource != null ) 
 168   
         {
 169  0
             try { lineSource.close(); } catch( Exception e ) {}
 170   
         }
 171   
         
 172  0
         lineSource = null;
 173  0
         line       = null;
 174  0
         number     = 0;
 175   
     }
 176   
     
 177   
 }
 178