/*
* @(#)AttributeFigureContentProducer.java
*
* Project: JHotdraw - a GUI framework for technical drawings
* http://www.jhotdraw.org
* http://jhotdraw.sourceforge.net
* Copyright: (c) by the original author(s) and all contributors
* License: Lesser GNU Public License (LGPL)
* http://www.opensource.org/licenses/lgpl-license.html
*/
package org.jhotdraw.contrib.html;
import java.io.Serializable;
import org.jhotdraw.util.StorableOutput;
import org.jhotdraw.util.StorableInput;
import java.io.IOException;
/**
* AttributeFigureContentProducer provides content for AttributeFigures.<br>
* It gives priority to base class supplied values, and if none, then it
* gets the value from the supplied AttributeContentProducerContext.
*
* @author Eduardo Francos - InContext
* @created 30 avril 2002
* @version <$CURRENT_VERSION$>
*/
public class AttributeFigureContentProducer extends FigureDataContentProducer
implements Serializable {
/**Constructor for the AttributeFigureContentProducer object */
public AttributeFigureContentProducer() { }
/**
* Produces the contents for the attribute
*
* @param context the calling client context
* @param ctxAttrName the attribute name
* @param ctxAttrValue the attribute value that led to the call to this
* @return The content value
*/
public Object getContent(ContentProducerContext context, String ctxAttrName, Object ctxAttrValue) {
// first chance to basic values
Object attrValue = super.getContent(context, ctxAttrName, ctxAttrValue);
if (attrValue != null) {
return attrValue;
}
// no, return value from attributes
return ((AttributeContentProducerContext)context).getAttribute(ctxAttrName);
}
/**
* Writes the storable
*
* @param dw the storable output
*/
public void write(StorableOutput dw) {
super.write(dw);
}
/**
* Writes the storable
*
* @param dr the storable input
* @exception IOException thrown by called methods
*/
public void read(StorableInput dr) throws IOException {
super.read(dr);
}
}