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Package: RuleServiceHelperImpl$1
RuleServiceHelperImpl$1
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2013 EclipseSource Muenchen GmbH and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Edgar Mueller - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.internal.rule;
15:
16: import java.util.LinkedHashMap;
17: import java.util.LinkedHashSet;
18: import java.util.Map;
19: import java.util.Set;
20:
21: import org.eclipse.emf.ecore.EObject;
22: import org.eclipse.emf.ecore.EStructuralFeature;
23: import org.eclipse.emf.ecore.EStructuralFeature.Setting;
24: import org.eclipse.emf.ecp.common.spi.UniqueSetting;
25: import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
26: import org.eclipse.emf.ecp.view.spi.context.ViewModelService;
27: import org.eclipse.emf.ecp.view.spi.model.VElement;
28: import org.eclipse.emf.ecp.view.spi.rule.RuleServiceHelper;
29:
30: /**
31: * @author emueller
32: *
33: */
34: public class RuleServiceHelperImpl implements ViewModelService, RuleServiceHelper {
35:
36: /**
37: * A predicate that is used to determine the set of {@link VElement}s
38: * if {@link RuleServiceHelperImpl#getInvolvedEObjects(Setting, Object, Class)} is called.
39: */
40: private interface RenderablePredicate {
41: boolean checkCurrentState(VElement renderable);
42: }
43:
44: private ViewModelContext context;
45:
46: /**
47: * @return
48: */
49: private RenderablePredicate createDisabledRenderablePredicate() {
50: return new RenderablePredicate() {
51: @Override
52: public boolean checkCurrentState(VElement renderable) {
53: return renderable.isEnabled();
54: }
55: };
56: }
57:
58: /**
59: * @return
60: */
61: private RenderablePredicate createHiddenRenderablePredicate() {
62: return new RenderablePredicate() {
63: @Override
64: public boolean checkCurrentState(VElement renderable) {
65: return renderable.isVisible();
66: }
67:
68: };
69: }
70:
71: @SuppressWarnings("unchecked")
72: private <T extends VElement> Set<T> collectFalseValues(Class<T> cls,
73: final Map<VElement, Boolean> renderableToStateMapping, RenderablePredicate renderablePredicate) {
74:
75: final Set<T> result = new LinkedHashSet<T>();
76:
77: for (final Map.Entry<VElement, Boolean> entry : renderableToStateMapping.entrySet()) {
78:
79: final VElement renderable = entry.getKey();
80: final Boolean newState = entry.getValue();
81: if (newState) {
82: continue;
83: }
84: if (renderablePredicate.checkCurrentState(renderable) == newState) {
85: continue;
86: }
87: if (cls.isInstance(renderable)) {
88: result.add((T) renderable);
89: } else {
90: EObject parent = renderable.eContainer();
91: while (parent != null) {
92: if (cls.isInstance(parent)) {
93: result.add((T) parent);
94: break;
95: }
96: parent = parent.eContainer();
97: }
98: }
99:
100: }
101:
102: return result;
103: }
104:
105: /**
106: * {@inheritDoc}
107: *
108: * @see org.eclipse.emf.ecp.view.spi.context.ViewModelService#instantiate(org.eclipse.emf.ecp.view.spi.context.ViewModelContext)
109: */
110: @Override
111: public void instantiate(ViewModelContext context) {
112: this.context = context;
113: }
114:
115: /**
116: * {@inheritDoc}
117: *
118: * @see org.eclipse.emf.ecp.view.spi.context.ViewModelService#dispose()
119: */
120: @Override
121: public void dispose() {
122:
123: }
124:
125: /**
126: * {@inheritDoc}
127: *
128: * @see org.eclipse.emf.ecp.view.spi.context.ViewModelService#getPriority()
129: */
130: @Override
131: public int getPriority() {
132: return 2;
133: }
134:
135: /**
136: * {@inheritDoc}
137: *
138: * @see org.eclipse.emf.ecp.view.spi.rule.RuleServiceHelper#getInvolvedEObjects(org.eclipse.emf.ecore.EStructuralFeature.Setting,
139: * java.lang.Object, java.lang.Class)
140: */
141: @Override
142: public <T extends VElement> Set<T> getInvolvedEObjects(Setting setting, Object newValue, Class<T> renderableClass) {
143: final Map<Setting, Object> newValues = new LinkedHashMap<EStructuralFeature.Setting, Object>();
144: newValues.put(setting, newValue);
145:
146: final Map<VElement, Boolean> disabledRenderables = context.getService(RuleService.class)
147: .getDisabledRenderables(newValues, UniqueSetting.createSetting(setting));
148: final Map<VElement, Boolean> hiddenRenderables = context.getService(RuleService.class)
149: .getHiddenRenderables(newValues, UniqueSetting.createSetting(setting));
150:
151: final Set<T> result = new LinkedHashSet<T>();
152: result.addAll(collectFalseValues(renderableClass, disabledRenderables, createDisabledRenderablePredicate()));
153: result.addAll(collectFalseValues(renderableClass, hiddenRenderables, createHiddenRenderablePredicate()));
154: return result;
155: }
156: }