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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
AbstractReaderSource.java | 0% | 0% | 0% | 0% |
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/*
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$Id: AbstractReaderSource.java,v 1.1 2004/04/19 07:29:44 cpoirier Exp $
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Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
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Redistribution and use of this software and associated documentation
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("Software"), with or without modification, are permitted provided
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that the following conditions are met:
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1. Redistributions of source code must retain copyright
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statements and notices. Redistributions must also contain a
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copy of this document.
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2. Redistributions in binary form must reproduce the
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above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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3. The name "groovy" must not be used to endorse or promote
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products derived from this Software without prior written
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permission of The Codehaus. For written permission,
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please contact info@codehaus.org.
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4. Products derived from this Software may not be called "groovy"
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nor may "groovy" appear in their names without prior written
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permission of The Codehaus. "groovy" is a registered
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trademark of The Codehaus.
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5. Due credit should be given to The Codehaus -
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http://groovy.codehaus.org/
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THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
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NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.codehaus.groovy.control.io;
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import java.io.BufferedReader;
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import java.io.IOException;
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import org.codehaus.groovy.control.CompilerConfiguration;
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import org.codehaus.groovy.control.Janitor;
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/**
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* For ReaderSources that can choose a parent class, a base that
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* provides common functionality.
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*
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* @author <a href="mailto:cpoirier@dreaming.org">Chris Poirier</a>
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*
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* @version $Id: AbstractReaderSource.java,v 1.1 2004/04/19 07:29:44 cpoirier Exp $
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*/
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public abstract class AbstractReaderSource implements ReaderSource |
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{ |
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protected CompilerConfiguration configuration; // Configuration data |
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/**
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* Standard construction stuff.
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*/
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public AbstractReaderSource( CompilerConfiguration configuration )
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{ |
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this.configuration = configuration;
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} |
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/**
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* Returns true if the source can be restarted (ie. if getReader()
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* will return non-null on subsequent calls.
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*/
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public boolean canReopenSource() |
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{ |
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return true; |
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} |
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//---------------------------------------------------------------------------
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// LINE SUPPLY
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private BufferedReader lineSource = null; // If set, a reader on the current source file |
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private String line = null; // The last line read from the current source file |
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private int number = 0; // The last line number read |
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/**
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* Returns a line from the source, or null, if unavailable. If
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* you supply a Janitor, resources will be cached.
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*/
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public String getLine( int lineNumber, Janitor janitor ) |
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{ |
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//
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// If the source is already open and is passed the line we
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// want, close it.
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if( lineSource != null && number > lineNumber ) |
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{ |
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cleanup(); |
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} |
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//
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// If the line source is closed, try to open it.
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if( lineSource == null ) |
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{ |
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try { lineSource = new BufferedReader( getReader() ); } catch( Exception e ) {} |
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number = 0; |
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} |
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//
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// Read until the appropriate line number.
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if( lineSource != null ) |
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{ |
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while( number < lineNumber )
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{ |
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try
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{ |
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line = lineSource.readLine(); |
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number++; |
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} |
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catch( IOException e )
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{ |
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cleanup(); |
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} |
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} |
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if( janitor == null ) |
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{ |
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cleanup(); |
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} |
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else
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{ |
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janitor.register( this );
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} |
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} |
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return line;
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} |
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/**
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* Cleans up any cached resources used by getLine().
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*/
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public void cleanup() |
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{ |
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if( lineSource != null ) |
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{ |
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try { lineSource.close(); } catch( Exception e ) {} |
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} |
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lineSource = null;
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line = null;
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number = 0; |
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} |
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} |
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