// Copyright 2003, FreeHEP.
package org.freehep.graphicsio.cgm;

import java.awt.Rectangle;
import java.io.IOException;

import org.freehep.util.io.Tag;

/**
 * Dummy TAG, for reading to keep length and tagID.
 *
 * @author Mark Donszelmann
 * @version $Id: CGMDummyTag.java,v 1.1 2003/12/02 23:40:29 duns Exp $
 */
public class CGMDummyTag
    extends CGMTag {

    private int tagID;
    private int len;

    public CGMDummyTag(int tagID, CGMInputStream cgm, int len) throws IOException {
        super((tagID >> 7) & 0x0f, tagID & 0x7F, 1);
        this.len = len;
        // read dummy bytes
        cgm.readByte(len);
    }

    public CGMTag read(int tagID, CGMInputStream cgm, int len) 
        throws IOException {
        System.err.println(getClass()+" is not supposed to be read like this.");    
        return null;
    }
    
    public void write(int tagID, CGMOutputStream cgm) throws IOException {
        System.err.println(getClass()+" is not supposed to be written to output.");
    }

    public void write(int tagID, CGMWriter cgm) throws IOException {
        System.err.println(getClass()+" is not supposed to be written to output.");
    }

    public int getLength() {
        return len;
    }

    public String toString() {
        return super.toString()+" length: "+len;
    }       
}
