// Copyright 2001, FreeHEP.
package org.freehep.graphicsio.emf;
import java.io.IOException;
import java.util.logging.Logger;
import org.freehep.util.io.Tag;
import org.freehep.util.io.TaggedInputStream;
import org.freehep.util.io.TaggedOutputStream;
import org.freehep.graphicsio.emf.gdi.GDIObject;
/**
* EMF specific tag, from which all other EMF Tags inherit.
*
* @author Mark Donszelmann
* @version $Id: EMFTag.java 10367 2007-01-22 19:26:48Z duns $
*/
public abstract class EMFTag extends Tag implements GDIObject {
/**
* logger for all instances
*/
protected static final Logger logger = Logger.getLogger("org.freehep.graphicsio.emf");
/**
* Constructs a EMFTag.
*
* @param id id of the element
* @param version emf version in which this element was first supported
*/
protected EMFTag(int id, int version) {
super(id, version);
}
public Tag read(int tagID, TaggedInputStream input, int len)
throws IOException {
return read(tagID, (EMFInputStream) input, len);
}
public abstract EMFTag read(int tagID, EMFInputStream emf, int len)
throws IOException;
public void write(int tagID, TaggedOutputStream output) throws IOException {
write(tagID, (EMFOutputStream) output);
}
/**
* Writes the extra tag information to the outputstream in binary format.
* This implementation writes nothing, but concrete tags may override this
* method. This method is called just after the TagHeader is written.
*
* @param tagID id of the tag
* @param emf Binary CGM output stream
* @throws java.io.IOException thrown by EMFOutputStream
*/
public void write(int tagID, EMFOutputStream emf) throws IOException {
// empty
}
/**
* @return a description of the tagName and tagID
*/
public String toString() {
return "EMFTag " + getName() + " (" + getTag() + ")";
}
/**
* displays the tag using the renderer
*
* @param renderer EMFRenderer storing the drawing session data
*/
public void render(EMFRenderer renderer) {
logger.warning("EMF tag not supported: " + toString());
}
}