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Package: DefaultEAttributeValueConverterImpl
DefaultEAttributeValueConverterImpl
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| DefaultEAttributeValueConverterImpl() |
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| DefaultEAttributeValueConverterImpl(String, double) |
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| convertToLiteral(EObject, EStructuralFeature, Object) |
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| convertToModelValue(EObject, EStructuralFeature, String) |
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| fromString(EStructuralFeature, String) |
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| isApplicable(EObject, EStructuralFeature, Object, EStructuralFeatureValueConverter.Direction) |
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| toString(EStructuralFeature, Object) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2016 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: * Mathias Schaefer - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emfforms.internal.common.converter;
15:
16: import java.util.ArrayList;
17: import java.util.Collection;
18: import java.util.List;
19: import java.util.StringTokenizer;
20:
21: import org.eclipse.emf.ecore.EAttribute;
22: import org.eclipse.emf.ecore.EObject;
23: import org.eclipse.emf.ecore.EReference;
24: import org.eclipse.emf.ecore.EStructuralFeature;
25: import org.eclipse.emf.ecore.util.EcoreUtil;
26: import org.eclipse.emfforms.spi.common.converter.EStructuralFeatureValueConverter;
27: import org.osgi.service.component.annotations.Component;
28:
29: /**
30: * Default value converter for generic EAttribute handling.
31: * Does currently not handle EReferences.
32: *
33: * @author Mathias Schaefer <mschaefer@eclipsesource.com>
34: *
35: */
36: @Component
37: public class DefaultEAttributeValueConverterImpl implements EStructuralFeatureValueConverter {
38:
39: /**
40: * Default list separator token.
41: */
42: public static final String DEFAULT_LIST_SEPARATOR = ","; //$NON-NLS-1$
43: /**
44: * The default priority for this converter implementation.
45: * Make sure your converter has a higher priority.
46: */
47: public static final double DEFAULT_PRIORITY = 2d;
48:
49: private final String listSeparator;
50: private final double priority;
51:
52: /**
53: * Default no value constructor (will use the
54: * DEFAULT_LIST_SEPARATOR and DEFAULT_PRIORITY for this converter).
55: */
56: public DefaultEAttributeValueConverterImpl() {
57: this(DEFAULT_LIST_SEPARATOR, DEFAULT_PRIORITY);
58: }
59:
60: /**
61: * Constructor which allows to override the list separator.
62: *
63: * @param listSeparator the separator token to split lists (i.e. "|")
64: * @param priority the priority for this converter
65: */
66: protected DefaultEAttributeValueConverterImpl(String listSeparator, double priority) {
67: this.listSeparator = listSeparator;
68: this.priority = priority;
69: }
70:
71: @Override
72: public double isApplicable(EObject eObject, EStructuralFeature feature, Object value, Direction direction) {
73:• if (Direction.MODEL_TO_LITERAL.equals(direction) || feature instanceof EReference) {
74: return NOT_APPLICABLE;
75: }
76: return priority; // otherwise always applicable
77: }
78:
79: @Override
80: public Object convertToModelValue(EObject eObject, EStructuralFeature feature, String literal) {
81:
82: try {
83:• if (feature.isMany()) {
84: final List<Object> objects = new ArrayList<Object>();
85: final StringTokenizer tokenizer = new StringTokenizer(literal, listSeparator, false);
86:• while (tokenizer.hasMoreTokens()) {
87:
88: final String item = tokenizer.nextToken();
89: objects.add(fromString(feature, item.trim()));
90:
91: }
92: return objects;
93: }
94: return fromString(feature, literal);
95: }
96: // BEGIN SUPRESS CATCH EXCEPTION
97: catch (final RuntimeException ex) {// END SUPRESS CATCH EXCEPTION
98: // silently ignore this (conversion can fail for various reasons)
99: return null;
100: }
101:
102: }
103:
104: @SuppressWarnings("unchecked")
105: @Override
106: public Object convertToLiteral(EObject eObject, EStructuralFeature feature, Object instance) {
107: try {
108:• if (instance instanceof Collection) {
109: final StringBuilder stringBuilder = new StringBuilder();
110:• for (final Object object : (Collection<Object>) instance) {
111:• if (stringBuilder.length() > 0) {
112: stringBuilder.append(listSeparator);
113: }
114: stringBuilder.append(String.valueOf(toString(feature, object)));
115: }
116: return stringBuilder.toString();
117: }
118: return toString(feature, instance);
119: }
120: // BEGIN SUPRESS CATCH EXCEPTION
121: catch (final RuntimeException ex) {// END SUPRESS CATCH EXCEPTION
122: // silently ignore this (conversion can fail for various reasons)
123: return null;
124: }
125: }
126:
127: /**
128: * Convert literal to Object.
129: *
130: * @param feature target feature
131: * @param literal to convert
132: * @return converted object
133: */
134: protected Object fromString(EStructuralFeature feature, String literal) {
135: return EcoreUtil.createFromString(((EAttribute) feature).getEAttributeType(), literal);
136: }
137:
138: /**
139: * Basic conversion from model to string literal.
140: *
141: * @param feature the feauter
142: * @param instance the model value
143: * @return the string value
144: */
145: protected Object toString(EStructuralFeature feature, Object instance) {
146: return String.valueOf(instance);
147:
148: }
149:
150: }