inputstreamreadersource.java

大名鼎鼎的java动态脚本语言。已经通过了sun的认证

/*
 $Id: InputStreamReaderSource.java,v 1.2 2004/04/29 22:39:39 glaforge Exp $

 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.

 Redistribution and use of this software and associated documentation
 ("Software"), with or without modification, are permitted provided
 that the following conditions are met:

 1. Redistributions of source code must retain copyright
    statements and notices.  Redistributions must also contain a
    copy of this document.

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    above copyright notice, this list of conditions and the
    following disclaimer in the documentation and/or other
    materials provided with the distribution.

 3. The name "groovy" must not be used to endorse or promote
    products derived from this Software without prior written
    permission of The Codehaus.  For written permission,
    please contact [e-mail].

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    permission of The Codehaus. "groovy" is a registered
    trademark of The Codehaus.

 5. Due credit should be given to The Codehaus -
    http://groovy.codehaus.org/

 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 */

package org.codehaus.groovy.control.io;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import org.codehaus.groovy.control.CompilerConfiguration;


/**
 *  A ReaderSource for source strings.
 *
 *  @author <a href="mailto:[e-mail]">Chris Poirier</a>
 *
 *  @version $Id: InputStreamReaderSource.java,v 1.2 2004/04/29 22:39:39 glaforge Exp $
 */

public class InputStreamReaderSource extends AbstractReaderSource
{
    
  //---------------------------------------------------------------------------
  // CONSTRUCTION AND SUCH
      
    private InputStream stream;  // The InputStream from which we produce a Reader.
    
    
   /**
    *  Creates the ReaderSource from a File descriptor.
    */
    
    public InputStreamReaderSource( InputStream stream, CompilerConfiguration configuration )
    {
        super( configuration );
        this.stream = stream;
    }
    
    
    
   /**
    *  Returns a new Reader on the underlying source object.  
    */
    
    public Reader getReader() throws IOException
    {
        if( stream != null )
        {
            Reader reader = new InputStreamReader( stream, configuration.getSourceEncoding() );
            stream = null;
            
            return reader;
        }
        
        return null;
    }

    

   /**
    *  Returns true if the source can be restarted (ie. if getReader()
    *  will return non-null on subsequent calls.
    */
    
    public boolean canReopenSource()
    {
        return false;
    }
    
    
    

    
}