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Package: ValueSelectionHelper
ValueSelectionHelper
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| ValueSelectionHelper() |
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| openEnumDialog(Shell, Class) |
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| openValueSelectionDialog(Shell, EStructuralFeature) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2014 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: * Eugen - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.template.internal.tooling.util;
15:
16: import java.lang.reflect.Constructor;
17: import java.lang.reflect.InvocationTargetException;
18:
19: import org.eclipse.emf.ecore.EAttribute;
20: import org.eclipse.emf.ecore.EReference;
21: import org.eclipse.emf.ecore.EStructuralFeature;
22: import org.eclipse.jface.dialogs.InputDialog;
23: import org.eclipse.jface.dialogs.MessageDialog;
24: import org.eclipse.jface.viewers.ArrayContentProvider;
25: import org.eclipse.jface.viewers.LabelProvider;
26: import org.eclipse.jface.window.Window;
27: import org.eclipse.swt.widgets.Shell;
28: import org.eclipse.ui.dialogs.ListDialog;
29:
30: /**
31: *
32: * @author Eugen Neufeld
33: *
34: */
35: public abstract class ValueSelectionHelper {
36:
37: /**
38: * Opens a dialog to select a possible value for a given {@link EStructuralFeature}.
39: * If the feature is a enum or boolean, it will show suggestions, otherwise, it will accept Strings.
40: *
41: * @param shell The {@link Shell} to open the dialog on
42: * @param structuralFeature The {@link EStructuralFeature} to select possible values for
43: * @return The selected value as an {@link Object}
44: */
45: public static Object openValueSelectionDialog(Shell shell, EStructuralFeature structuralFeature) {
46:• if (structuralFeature == null) {
47: return null;
48: }
49:• if (EReference.class.isInstance(structuralFeature)) {
50: // TODO show all references
51: return null;
52: }
53: final EAttribute attribute = (EAttribute) structuralFeature;
54: Class<?> attribuetClazz = attribute.getEAttributeType().getInstanceClass();
55:• if (attribuetClazz.isPrimitive()) {
56: attribuetClazz = getPrimitiveClass(attribuetClazz);
57: }
58: Object object = null;
59:• if (Enum.class.isAssignableFrom(attribuetClazz)) {
60: object = openEnumDialog(shell, attribuetClazz);
61:• } else if (String.class.isAssignableFrom(attribuetClazz)
62:• || Number.class.isAssignableFrom(attribuetClazz) || Boolean.class.isAssignableFrom(attribuetClazz)) {
63: try {
64: final Constructor<?> constructor = attribuetClazz.getConstructor(String.class);
65: final InputDialog id = new InputDialog(
66: shell,
67: "Insert the value", //$NON-NLS-1$
68: "The value must be parseable by the " //$NON-NLS-1$
69: + attribuetClazz.getSimpleName()
70: + " class. For a double value please use the #.# format. For boolean values 'true' or 'false'.", //$NON-NLS-1$
71: null, null);
72: final int inputResult = id.open();
73:• if (Window.OK == inputResult) {
74: object = constructor.newInstance(id.getValue());
75: }
76: } catch (final IllegalArgumentException ex) {
77:
78: } catch (final SecurityException ex) {
79:
80: } catch (final NoSuchMethodException ex) {
81: } catch (final InstantiationException ex) {
82: } catch (final IllegalAccessException ex) {
83: } catch (final InvocationTargetException ex) {
84: }
85: } else {
86: MessageDialog.openError(shell, "Not primitive Attribute selected", //$NON-NLS-1$
87: "The selected attribute has a not primitive type. We can't provide you support for it!"); //$NON-NLS-1$
88: }
89: return object;
90: }
91:
92: private static Object openEnumDialog(Shell shell, Class<?> attribuetClazz) {
93: final Object[] enumValues = attribuetClazz.getEnumConstants();
94: final ListDialog ld = new ListDialog(shell);
95: ld.setLabelProvider(new LabelProvider());
96: ld.setContentProvider(ArrayContentProvider.getInstance());
97: ld.setInput(enumValues);
98: ld.setInitialSelections(new Object[] { enumValues[0] });
99: ld.setMessage("Please select the enum value to set."); //$NON-NLS-1$
100: ld.setTitle("Select a value"); //$NON-NLS-1$
101: final int enumSelectionResult = ld.open();
102:• if (Window.OK == enumSelectionResult) {
103: return ld.getResult()[0];
104: }
105: return null;
106: }
107:
108: private static Class<?> getPrimitiveClass(Class<?> attribuetClazz) {
109:• if (int.class.isAssignableFrom(attribuetClazz)) {
110: attribuetClazz = Integer.class;
111:• } else if (long.class.isAssignableFrom(attribuetClazz)) {
112: attribuetClazz = Long.class;
113:• } else if (float.class.isAssignableFrom(attribuetClazz)) {
114: attribuetClazz = Float.class;
115:• } else if (double.class.isAssignableFrom(attribuetClazz)) {
116: attribuetClazz = Double.class;
117:• } else if (boolean.class.isAssignableFrom(attribuetClazz)) {
118: attribuetClazz = Boolean.class;
119:• } else if (char.class.isAssignableFrom(attribuetClazz)) {
120: attribuetClazz = Character.class;
121: }
122: return attribuetClazz;
123: }
124: }