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Java > Open Source Codes > org > eclipse > osgi > service > resolver > StateDelta


1 /*******************************************************************************
2  * Copyright (c) 2003, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.osgi.service.resolver;
12
13 /**
14  * A state delta contains all the changes to bundles within a state.
15  * <p>
16  * Clients may implement this interface.
17  * </p>
18  * @since 3.1
19  */
20 public interface StateDelta {
21     /**
22      * Returns an array of all the bundle deltas in this delta regardless of type.
23      * @return an array of bundle deltas
24      */
25     public BundleDelta[] getChanges();
26
27     /**
28      * Returns an array of all the members
29      * of this delta which match the given flags. If an exact match is requested
30      * then only delta members whose type exactly matches the given mask are
31      * included. Otherwise, all bundle deltas whose type's bit-wise and with the
32      * mask is non-zero are included.
33      *
34      * @param mask
35      * @param exact
36      * @return an array of bundle deltas matching the given match criteria.
37      */
38     public BundleDelta[] getChanges(int mask, boolean exact);
39
40     /**
41      * Returns the state whose changes are represented by this delta.
42      * @return the state
43      */
44     public State getState();
45 }
46
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