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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2011 IBM Corporation and others. | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * IBM Corporation - initial API and implementation | |
10 | *******************************************************************************/ | |
11 | package org.eclipse.jdt.internal.ui.wizards.buildpaths; | |
12 | ||
13 | import org.eclipse.jface.viewers.ContentViewer; | |
14 | import org.eclipse.jface.viewers.IBaseLabelProvider; | |
15 | import org.eclipse.jface.viewers.ILabelProvider; | |
16 | import org.eclipse.jface.viewers.Viewer; | |
17 | import org.eclipse.jface.viewers.ViewerComparator; | |
18 | ||
19 | import org.eclipse.jdt.core.IAccessRule; | |
20 | import org.eclipse.jdt.core.IClasspathEntry; | |
21 | ||
22 | public class CPListElementSorter extends ViewerComparator { | |
23 | ||
24 | private static final int SOURCE= 0; | |
25 | private static final int PROJECT= 1; | |
26 | private static final int LIBRARY= 2; | |
27 | private static final int VARIABLE= 3; | |
28 | private static final int CONTAINER= 4; | |
29 | ||
30 | private static final int ATTRIBUTE= 5; | |
31 | private static final int CONTAINER_ENTRY= 6; | |
32 | ||
33 | private static final int OTHER= 7; | |
34 | ||
35 | /* | |
36 | * @see ViewerSorter#category(Object) | |
37 | */ | |
38 | @Override | |
39 | public int category(Object obj) { | |
40 | if (obj instanceof CPListElement) { | |
41 | CPListElement element= (CPListElement) obj; | |
42 | if (element.getParentContainer() != null) { | |
43 | return CONTAINER_ENTRY; | |
44 | } | |
45 | switch (element.getEntryKind()) { | |
46 | case IClasspathEntry.CPE_LIBRARY: | |
47 | return LIBRARY; | |
48 | case IClasspathEntry.CPE_PROJECT: | |
49 | return PROJECT; | |
50 | case IClasspathEntry.CPE_SOURCE: | |
51 | return SOURCE; | |
52 | case IClasspathEntry.CPE_VARIABLE: | |
53 | return VARIABLE; | |
54 | case IClasspathEntry.CPE_CONTAINER: | |
55 | return CONTAINER; | |
56 | } | |
57 | } else if (obj instanceof CPListElementAttribute) { | |
58 | return ATTRIBUTE; | |
59 | } else if (obj instanceof IAccessRule) { | |
60 | return ATTRIBUTE; | |
61 | } | |
62 | return OTHER; | |
63 | } | |
64 | ||
65 | /* (non-Javadoc) | |
66 | * @see org.eclipse.jface.viewers.ViewerSorter#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) | |
67 | */ | |
68 | @Override | |
69 | public int compare(Viewer viewer, Object e1, Object e2) { | |
70 | ||
71 | int cat1 = category(e1); | |
72 | int cat2 = category(e2); | |
73 | ||
74 | if (cat1 != cat2) | |
75 | return cat1 - cat2; | |
76 | ||
77 | if (cat1 == ATTRIBUTE || cat1 == CONTAINER_ENTRY) { | |
78 | return 0; // do not sort attributes or container entries | |
79 | } | |
80 | ||
81 | if (viewer instanceof ContentViewer) { | |
82 | IBaseLabelProvider prov = ((ContentViewer) viewer).getLabelProvider(); | |
83 | if (prov instanceof ILabelProvider) { | |
84 | ILabelProvider lprov = (ILabelProvider) prov; | |
85 | String name1 = lprov.getText(e1); | |
86 | String name2 = lprov.getText(e2); | |
87 | return getComparator().compare(name1, name2); | |
88 | } | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | ||
94 | } |