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/* Glazed Lists (c) 2003-2006 */
/* http://publicobject.com/glazedlists/ publicobject.com,*/
/* O'Dell Engineering Ltd.*/
package ca.odell.glazedlists.impl.pmap;
// NIO is used for CTP
import ca.odell.glazedlists.impl.io.Bufferlo;
/**
* A ValueCallback that simply blocks until the value is ready.
*
* @author <a href="mailto:jesse@swank.ca">Jesse Wilson</a>
*/
class BlockingValueCallback implements ValueCallback {
/** the value returned */
private Bufferlo value = null;
/**
* Gets the value for the specified Chunk.
*/
public static Bufferlo get(Chunk member) {
// queue the get
BlockingValueCallback callback = new BlockingValueCallback();
member.fetchValue(callback);
// wait till its ready
synchronized(callback) {
if(callback.value == null) {
try {
callback.wait();
} catch(InterruptedException e) {
throw new RuntimeException(e);
}
}
}
// return the result
return callback.value;
}
/**
* Handles a value being completely loaded into memory and ready to read.
*/
public void valueLoaded(Chunk member, Bufferlo value) {
synchronized(this) {
this.value = value;
notify();
}
}
}
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