/*
* JBoss, Home of Professional Open Source.
*
* See the LEGAL.txt file distributed with this work for information regarding copyright ownership and licensing.
*
* See the AUTHORS.txt file distributed with this work for a full listing of individual contributors.
*/
package org.teiid.designer.core.workspace;
import java.util.Map.Entry;
import org.teiid.designer.core.util.OverflowingLRUCache;
/**
* An LRU cache of <code>ModelBuffers</code>.
*
* @since 8.0
*/
public class ModelBufferCache extends OverflowingLRUCache {
/**
*/
private static final long serialVersionUID = 1L;
/**
* Constructs a new buffer cache of the given size.
*/
public ModelBufferCache(int size) {
super(size);
}
/**
* Returns true if the buffer is successfully closed and
* removed from the cache, otherwise false.
*
* <p>NOTE: this triggers an external removal of this buffer
* by closing the buffer.
*/
@Override
protected boolean close(Entry entry) {
final Object value = entry.getValue();
if ( value instanceof ModelBuffer ) {
ModelBuffer buffer= (ModelBuffer) value;
if (buffer.hasUnsavedChanges()) {
return false;
}
buffer.close();
return true;
}
return false;
}
}