package at.knowcenter.wag.egov.egiz.sig.connectors.moa;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.commons.httpclient.methods.multipart.StringPart;
import org.apache.commons.httpclient.util.EncodingUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class StringPartMR extends StringPart {
	
    /** Log object for this class. */
    private static final Log LOG = LogFactory.getLog(StringPartMR.class);

       
    /** Content dispostion characters */
    protected static final String CONTENT_ID = "Content-Id: ";
    
    /** Content dispostion as a byte array */
    protected static final byte[] CONTENT_ID_BYTES = 
      EncodingUtil.getAsciiBytes(CONTENT_ID);

    private String contentID = ""; 

	public StringPartMR(String name, String value, String charset) {
		super(name, value, charset);
		// TODO Auto-generated constructor stub
	}

	public StringPartMR(String name, String value) {
		super(name, value);
		// TODO Auto-generated constructor stub
	}
	
	/**
     * Write the content disposition header to the specified output stream
     * 
     * @param out The output stream
     * @throws IOException If an IO problem occurs.
     */
    protected void sendDispositionHeader(OutputStream out) throws IOException {
        LOG.trace("enter sendContendID instead of ContentDisposition(OutputStream out)");
        //  	Do nothing !
    }
    
	/**
     * Write the content id header to the specified output stream
     * 
     * @param out The output stream
     * @throws IOException If an IO problem occurs.
     */
    protected void sendContentIDHeader(OutputStream out) throws IOException {
        LOG.trace("enter sendContendID instead of ContentDisposition(OutputStream out)");
        out.write(CONTENT_ID_BYTES);
        out.write(EncodingUtil.getAsciiBytes(getContentID()));
    }
    
    
    /**
     * Write the content type header to the specified output stream
     * @param out The output stream
     * @throws IOException If an IO problem occurs.
     */
     protected void sendContentTypeHeader(OutputStream out) throws IOException {
        LOG.trace("enter sendContentTypeHeader(OutputStream out)");
        String contentType = getContentType();
        if (contentType != null) {
            out.write(CRLF_BYTES);
            out.write(CONTENT_TYPE_BYTES);
            out.write(EncodingUtil.getAsciiBytes(contentType));
            String charSet = getCharSet();
            if (charSet != null) {
                out.write(CHARSET_BYTES);
                out.write(EncodingUtil.getAsciiBytes(charSet));
            }
        }
    }

    /**
     * Write the content transfer encoding header to the specified 
     * output stream
     * 
     * @param out The output stream
     * @throws IOException If an IO problem occurs.
     */
     protected void sendTransferEncodingHeader(OutputStream out) throws IOException {
        LOG.trace("enter sendTransferEncodingHeader(OutputStream out)");
        String transferEncoding = getTransferEncoding();
        if (transferEncoding != null) {
            out.write(CRLF_BYTES);
            out.write(CONTENT_TRANSFER_ENCODING_BYTES);
            out.write(EncodingUtil.getAsciiBytes(transferEncoding));
        }
    }

     public void setContentID(String contentid) {
    	 this.contentID = contentid;
     }
     
     public String getContentID() {
    	 return this.contentID;    	 
     }
     
    /**
     * Write the end of the header to the output stream
     * @param out The output stream
     * @throws IOException If an IO problem occurs.
     */
    protected void sendEndOfHeader(OutputStream out) throws IOException {
        LOG.trace("enter sendEndOfHeader(OutputStream out)");
        out.write(CRLF_BYTES);
        out.write(CRLF_BYTES);
    }

	
    /**
     * Write all the data to the output stream.
     * If you override this method make sure to override 
     * #length() as well
     * 
     * @param out The output stream
     * @throws IOException If an IO problem occurs.
     */
    public void send(OutputStream out) throws IOException {
        LOG.trace("enter send(OutputStream out)");
        sendStart(out);

        sendContentIDHeader(out);
        sendContentTypeHeader(out);
        sendTransferEncodingHeader(out);
        sendEndOfHeader(out);
        sendData(out);
        sendEnd(out);
    }


    /**
     * Return the full length of all the data.
     * If you override this method make sure to override 
     * #send(OutputStream) as well
     * 
     * @return long The length.
     * @throws IOException If an IO problem occurs
     */
    public long length() throws IOException {
        LOG.trace("enter length()");
        if (lengthOfData() < 0) {
            return -1;
        }
        ByteArrayOutputStream overhead = new ByteArrayOutputStream();
        sendStart(overhead);

        sendContentIDHeader(overhead);
        sendContentTypeHeader(overhead);
        sendTransferEncodingHeader(overhead);
        sendEndOfHeader(overhead);
        sendEnd(overhead);
        return overhead.size() + lengthOfData();
    }


	
	
}