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Package: ECPTooltipModifierHelper
ECPTooltipModifierHelper
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| getStringModifiers() |
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| loadClass(String, String) |
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| modifyString(String, EStructuralFeature.Setting) |
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| readStringModifiers() |
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| static {...} |
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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: * Johannes Faltermeier - Bug 459998
14: ******************************************************************************/
15: package org.eclipse.emf.ecp.view.spi.provider;
16:
17: import java.lang.reflect.Constructor;
18: import java.lang.reflect.InvocationTargetException;
19: import java.util.Comparator;
20: import java.util.Set;
21: import java.util.SortedSet;
22: import java.util.TreeSet;
23:
24: import org.eclipse.core.runtime.IConfigurationElement;
25: import org.eclipse.core.runtime.IExtensionRegistry;
26: import org.eclipse.core.runtime.Platform;
27: import org.eclipse.emf.ecore.EStructuralFeature.Setting;
28: import org.eclipse.emf.ecp.view.internal.ui.Activator;
29: import org.osgi.framework.Bundle;
30:
31: /**
32: * A helper to ease the access to the string modifiers.
33: *
34: * @author Eugen Neufeld
35: * @author Johannes Faltermeier
36: * @since 1.3
37: */
38: public final class ECPTooltipModifierHelper {
39: private static final String CLASS_CANNOT_BE_RESOLVED = "%1$s cannot be loaded because bundle %2$s cannot be resolved."; //$NON-NLS-1$
40: private static final String CLASS = "class"; //$NON-NLS-1$
41: private static final String EXTENSION_POINT_ID = "org.eclipse.emf.ecp.ui.view.tooltipModifier"; //$NON-NLS-1$
42:
43: private ECPTooltipModifierHelper() {
44:
45: }
46:
47: private static SortedSet<ECPStringModifier> stringModifiers = new TreeSet<ECPStringModifier>(
48: new Comparator<ECPStringModifier>() {
49: @Override
50: public int compare(ECPStringModifier arg0, ECPStringModifier arg1) {
51: if (arg0.getPriority() == arg1.getPriority()) {
52: /* compare would return 0, meaning the modifiers are identical -> 1 service would get lost */
53: return arg0.getClass().getName().compareTo(arg1.getClass().getName());
54: }
55: final double compare = arg0.getPriority() - arg1.getPriority();
56: return compare < 0 ? -1 : 1;
57: }
58: });
59:
60: private static synchronized Set<ECPStringModifier> getStringModifiers() {
61:• if (stringModifiers == null || stringModifiers.isEmpty()) {
62: readStringModifiers();
63: }
64: return stringModifiers;
65: }
66:
67: private static void readStringModifiers() {
68: final IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
69:• if (extensionRegistry == null) {
70: return;
71: }
72: final IConfigurationElement[] controls = extensionRegistry
73: .getConfigurationElementsFor(
74: EXTENSION_POINT_ID);
75:• for (final IConfigurationElement e : controls) {
76: try {
77: final String clazz = e.getAttribute(CLASS);
78: final Class<? extends ECPStringModifier> resolvedClass = loadClass(e
79: .getContributor().getName(), clazz);
80: final Constructor<? extends ECPStringModifier> controlConstructor = resolvedClass
81: .getConstructor();
82: final ECPStringModifier stringModifier = controlConstructor.newInstance();
83: stringModifiers.add(stringModifier);
84: } catch (final ClassNotFoundException ex) {
85: Activator.log(ex);
86: } catch (final NoSuchMethodException ex) {
87: Activator.log(ex);
88: } catch (final SecurityException ex) {
89: Activator.log(ex);
90: } catch (final InstantiationException ex) {
91: Activator.log(ex);
92: } catch (final IllegalAccessException ex) {
93: Activator.log(ex);
94: } catch (final IllegalArgumentException ex) {
95: Activator.log(ex);
96: } catch (final InvocationTargetException ex) {
97: Activator.log(ex);
98: }
99:
100: }
101:
102: }
103:
104: @SuppressWarnings("unchecked")
105: private static <T> Class<T> loadClass(String bundleName, String clazz)
106: throws ClassNotFoundException {
107: final Bundle bundle = Platform.getBundle(bundleName);
108:• if (bundle == null) {
109: throw new ClassNotFoundException(String.format(
110: CLASS_CANNOT_BE_RESOLVED, clazz, bundleName));
111: }
112: return (Class<T>) bundle.loadClass(clazz);
113:
114: }
115:
116: /**
117: * Modifies a string by iterating over all known {@link ECPStringModifier}.
118: *
119: * @param text the text to modify
120: * @param setting the {@link Setting} used to create the text
121: * @return the modified text
122: */
123: public static String modifyString(String text, Setting setting) {
124: String returnValue = text;
125:• for (final ECPStringModifier tooltipModifier : getStringModifiers()) {
126: returnValue = tooltipModifier.modifyString(returnValue, setting);
127: }
128: return returnValue;
129: }
130:
131: }