Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
IndirectBooleanExpression |
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IndirectBooleanExpression$1 |
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| 0.0;0 |
1 | /* | |
2 | * Copyright 2008 Sun Microsystems, Inc. All Rights Reserved. | |
3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 | * | |
5 | * This code is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 only, as | |
7 | * published by the Free Software Foundation. Sun designates this | |
8 | * particular file as subject to the "Classpath" exception as provided | |
9 | * by Sun in the LICENSE file that accompanied this code. | |
10 | * | |
11 | * This code is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * version 2 for more details (a copy is included in the LICENSE file that | |
15 | * accompanied this code). | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License version | |
18 | * 2 along with this work; if not, write to the Free Software Foundation, | |
19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
20 | * | |
21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
22 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
23 | * have any questions. | |
24 | */ | |
25 | ||
26 | package com.sun.javafx.runtime.location; | |
27 | ||
28 | /** | |
29 | * Indirect locations are used to express bindings that respond nonuniformly with respect to dependencies. For example, | |
30 | * bind a.b will change when a changes or when a.b changes, but the response to changes is different. If a.b changes but | |
31 | * a doesn't, the response is simply to update the value; if a changes, the response also includes updating the | |
32 | * dependency set as well, removing the old a.b and adding the new one. | |
33 | * | |
34 | * Indirect location instances are created with a set of static dependencies; in the example above, a would be a static | |
35 | * dependency. Instances override computeLocation(), which returns a Location with its secondary dependencies set up; | |
36 | * in the example above, calling computeLocation() would evaluate a, and return a location corresponding to a.b. | |
37 | * | |
38 | * @author Brian Goetz | |
39 | */ | |
40 | 13 | public abstract class IndirectBooleanExpression extends BooleanVariable implements IndirectLocation<BooleanLocation> { |
41 | ||
42 | protected final IndirectLocationHelper<BooleanLocation> helper; | |
43 | ||
44 | public IndirectBooleanExpression(boolean lazy, Location... dependencies) { | |
45 | 7 | super(); |
46 | 7 | helper = new IndirectLocationHelper<BooleanLocation>(this, dependencies); |
47 | 7 | bind(lazy, new BooleanBindingExpression() { |
48 | public boolean computeValue() { | |
49 | 15 | return helper.get().getAsBoolean(); |
50 | } | |
51 | }); | |
52 | 7 | } |
53 | ||
54 | public final BooleanLocation computeLocationInternal() { | |
55 | 13 | return computeLocation(); |
56 | } | |
57 | ||
58 | protected abstract BooleanLocation computeLocation(); | |
59 | ||
60 | public BooleanLocation getUnderlyingLocation() { | |
61 | 0 | return computeLocation(); |
62 | } | |
63 | } |