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Java > Open Source Codes > org > objectstyle > cayenne > swing > ActionDelegate


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
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6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
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56 package org.objectstyle.cayenne.swing;
57
58 import java.util.Collections JavaDoc;
59
60 /**
61  * An implementation of BindingDelegate that invokes a no-argument context action on every
62  * model update.
63  *
64  * @author Andrei Adamchik
65  */
66 public class ActionDelegate implements BindingDelegate {
67
68     protected BindingExpression expression;
69
70     public ActionDelegate(String JavaDoc expression) {
71         this.expression = new BindingExpression(expression);
72     }
73
74     public void modelUpdated(ObjectBinding binding, Object JavaDoc oldValue, Object JavaDoc newValue) {
75         // TODO: might add new and old value as variables...
76 expression.getValue(binding.getContext(), Collections.EMPTY_MAP);
77     }
78 }
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