/*
* @(#)ResourceContentProducer.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.IOException;
import java.io.InputStream;
import java.io.Serializable;
import org.jhotdraw.util.StorableInput;
import org.jhotdraw.util.StorableOutput;
/**
* ResourceContentProducer produces contents from resource in the application's
* CLASSPATH.<br>
* It takes a resource name and loads the resource as a String.
*
* It can either be specific if set for a specific resource, or generic, retrieving
* any resource passed to the getContents method.
*
* @author Eduardo Francos - InContext
* @created 1 mai 2002
* @version <$CURRENT_VERSION$>
*/
public class ResourceContentProducer extends AbstractContentProducer
implements Serializable {
/** Description of the Field */
private String fResourceName;
/**
* Constructor for the ResourceContentProducer object
*/
public ResourceContentProducer() { }
/**
* Constructor for the ResourceContentProducer object
*
* @param resourceName Description of the Parameter
*/
public ResourceContentProducer(String resourceName) {
setResourceName(resourceName);
}
/**
* Gets the content attribute of the ResourceContentProducer object
*
* @param context Description of the Parameter
* @param ctxAttrName Description of the Parameter
* @param ctxAttrValue Description of the Parameter
* @return The content value
*/
public Object getContent(ContentProducerContext context, String ctxAttrName, Object ctxAttrValue) {
try {
// if we have our own resource then use it
// otherwise use the one supplied
String resourceName = (getResourceName() != null) ? getResourceName() : (String)ctxAttrValue;
InputStream reader = this.getClass().getResourceAsStream(resourceName);
int available = reader.available();
byte contents[] = new byte[available];
reader.read(contents, 0, available);
reader.close();
return new String(contents);
}
catch (Exception ex) {
ex.printStackTrace();
return ex.toString();
}
}
/**
* Writes the storable
*
* @param dw the storable output
*/
public void write(StorableOutput dw) {
super.write(dw);
dw.writeString(getResourceName());
}
/**
* Writes the storable
*
* @param dr the storable input
* @exception IOException thrown by called methods
*/
public void read(StorableInput dr) throws IOException {
super.read(dr);
setResourceName (dr.readString());
}
public String getResourceName() {
return fResourceName;
}
protected void setResourceName(String newResourceName) {
fResourceName = newResourceName;
}
}