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Package: PreSetValidationStrategy
PreSetValidationStrategy
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| PreSetValidationStrategy(VElement, EStructuralFeature, UpdateValueStrategy) |
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| convert(Object) |
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| getStructuralFeature() |
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| getUpdatePolicy() |
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| getVElement() |
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| setAfterConvertValidator(IValidator) |
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| setAfterGetValidator(IValidator) |
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| setBeforeSetValidator(IValidator) |
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| setConverter(IConverter) |
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| validateAfterConvert(Object) |
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| validateAfterGet(Object) |
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| validateBeforeSet(Object) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2017 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.edit.spi.swt.util;
15:
16: import org.eclipse.core.databinding.UpdateValueStrategy;
17: import org.eclipse.core.databinding.conversion.IConverter;
18: import org.eclipse.core.databinding.validation.IValidator;
19: import org.eclipse.core.runtime.IStatus;
20: import org.eclipse.core.runtime.Status;
21: import org.eclipse.emf.common.util.BasicDiagnostic;
22: import org.eclipse.emf.common.util.Diagnostic;
23: import org.eclipse.emf.databinding.EMFUpdateValueStrategy;
24: import org.eclipse.emf.ecore.EStructuralFeature;
25: import org.eclipse.emf.ecp.view.spi.model.VDiagnostic;
26: import org.eclipse.emf.ecp.view.spi.model.VElement;
27: import org.eclipse.emf.ecp.view.spi.model.VViewFactory;
28: import org.eclipse.emf.edit.command.SetCommand;
29: import org.eclipse.emfforms.spi.common.validation.PreSetValidationService;
30: import org.osgi.framework.BundleContext;
31: import org.osgi.framework.FrameworkUtil;
32: import org.osgi.framework.ServiceReference;
33:
34: /**
35: * A common {@link EMFUpdateValueStrategy} that implements {@link #validateBeforeSet(Object)}.
36: *
37: * @since 1.13
38: */
39: public class PreSetValidationStrategy extends EMFUpdateValueStrategy {
40:
41: private final EStructuralFeature eStructuralFeature;
42: private final VElement vElement;
43: private final UpdateValueStrategy strategy;
44:
45: /**
46: * Constructor.
47: *
48: * @param vElement the {@link VElement}
49: * @param eStructuralFeature an {@link EStructuralFeature} that defines any validation constraints
50: * @param delegate the strategy to delegate to
51: */
52: public PreSetValidationStrategy(VElement vElement, EStructuralFeature eStructuralFeature,
53: UpdateValueStrategy delegate) {
54: this.vElement = vElement;
55: this.eStructuralFeature = eStructuralFeature;
56: strategy = delegate;
57: }
58:
59: @Override
60: public IStatus validateBeforeSet(Object value) {
61: final BundleContext bundleContext = FrameworkUtil
62: .getBundle(getClass())
63: .getBundleContext();
64: final ServiceReference<PreSetValidationService> serviceReference = bundleContext
65: .getServiceReference(PreSetValidationService.class);
66:
67:• if (serviceReference == null) {
68: return strategy.validateBeforeSet(value);
69: }
70:
71:• if (eStructuralFeature.isUnsettable() && SetCommand.UNSET_VALUE == value) {
72: /* we are dealing with an unsettable feature and the unset value */
73: /* we need to validate the default value instead of the unset value */
74: value = eStructuralFeature.getDefaultValue();
75: }
76:
77: try {
78:
79: final PreSetValidationService service = bundleContext.getService(serviceReference);
80:
81:• if (service == null) {
82: return strategy.validateBeforeSet(value);
83: }
84:
85: final Diagnostic result = service.validate(eStructuralFeature, value);
86:
87:• if (result.getSeverity() == Diagnostic.OK) {
88: return Status.OK_STATUS;
89: }
90:
91: // TODO: existing diagnostics?
92: final VDiagnostic vDiagnostic = VViewFactory.eINSTANCE.createDiagnostic();
93: vDiagnostic.getDiagnostics().add(result);
94:• if (vElement != null) {
95: vElement.setDiagnostic(vDiagnostic);
96: }
97: return BasicDiagnostic.toIStatus(result);
98: } finally {
99: bundleContext.ungetService(serviceReference);
100: }
101: }
102:
103: @Override
104: public Object convert(Object value) {
105: return strategy.convert(value);
106: }
107:
108: @Override
109: public int getUpdatePolicy() {
110: return strategy.getUpdatePolicy();
111: }
112:
113: @Override
114: public UpdateValueStrategy setAfterConvertValidator(IValidator validator) {
115: super.setAfterConvertValidator(validator);
116: return strategy.setAfterConvertValidator(validator);
117: }
118:
119: @Override
120: public UpdateValueStrategy setBeforeSetValidator(IValidator validator) {
121: super.setBeforeSetValidator(validator);
122: return strategy.setBeforeSetValidator(validator);
123: }
124:
125: @Override
126: public UpdateValueStrategy setAfterGetValidator(IValidator validator) {
127: super.setAfterGetValidator(validator);
128: return strategy.setAfterGetValidator(validator);
129: }
130:
131: @Override
132: public UpdateValueStrategy setConverter(IConverter converter) {
133: super.setConverter(converter);
134: return strategy.setConverter(converter);
135: }
136:
137: @Override
138: public IStatus validateAfterConvert(Object value) {
139: return strategy.validateAfterConvert(value);
140: }
141:
142: @Override
143: public IStatus validateAfterGet(Object value) {
144: return strategy.validateAfterGet(value);
145: }
146:
147: /**
148: * Returns the {@link EStructuralFeature} that defines any validation constraints.
149: *
150: * @return the structural feature
151: */
152: public EStructuralFeature getStructuralFeature() {
153: return eStructuralFeature;
154: }
155:
156: /**
157: * Returns the associated {@link VElement}.
158: *
159: * @return the {@link VElement}
160: */
161: public VElement getVElement() {
162: return vElement;
163: }
164: }