src/main/java/org/apache/james/mime4j/message/TempFileBinaryBody.java

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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
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package org.apache.james.mime4j.message;

import org.apache.james.mime4j.decoder.CodecUtil;
import org.apache.james.mime4j.message.storage.TempFile;
import org.apache.james.mime4j.message.storage.TempPath;
import org.apache.james.mime4j.message.storage.TempStorage;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;


/**
 * Binary body backed by a {@link org.apache.james.mime4j.message.storage.TempFile}.
 *
 * 
 * @version $Id: TempFileBinaryBody.java,v 1.2 2004/10/02 12:41:11 ntherning Exp $
 */
class TempFileBinaryBody extends AbstractBody implements BinaryBody {
    
    private TempFile tempFile = null;

    /**
     * Use the given InputStream to build the TemporyFileBinaryBody
     * 
     * @param is the InputStream to use as source
     * @throws IOException
     */
    public TempFileBinaryBody(final InputStream is) throws IOException {
        
        TempPath tempPath = TempStorage.getInstance().getRootTempPath();
        tempFile = tempPath.createTempFile("attachment", ".bin");
        
        OutputStream out = tempFile.getOutputStream();
        CodecUtil.copy(is, out);
        out.close();
    }
    
    /**
     * @see org.apache.james.mime4j.message.BinaryBody#getInputStream()
     */
    public InputStream getInputStream() throws IOException {
        return tempFile.getInputStream();
    }
    
    /**
     * @see org.apache.james.mime4j.message.Body#writeTo(java.io.OutputStream, int)
     */
    public void writeTo(OutputStream out, int mode) throws IOException {
        if (disposed)
            throw new IllegalStateException("TempFileBinaryBody has been disposed");

        final InputStream inputStream = getInputStream();
        CodecUtil.copy(inputStream,out);
    }

    /**
     * Deletes the temporary file that stores the content of this binary body.
     * 
     * @see org.apache.james.mime4j.message.Disposable#dispose()
     */
    public void dispose() {
        try {
            tempFile.delete();
        } finally {
            tempFile = null;

            super.dispose();
        }
    }
}