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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.viewsupport; | |
12 | ||
13 | import org.eclipse.jface.viewers.Viewer; | |
14 | import org.eclipse.jface.viewers.ViewerFilter; | |
15 | ||
16 | import org.eclipse.jdt.core.Flags; | |
17 | import org.eclipse.jdt.core.IField; | |
18 | import org.eclipse.jdt.core.IJavaElement; | |
19 | import org.eclipse.jdt.core.IMember; | |
20 | import org.eclipse.jdt.core.IType; | |
21 | import org.eclipse.jdt.core.JavaModelException; | |
22 | ||
23 | import org.eclipse.jdt.internal.corext.util.JavaModelUtil; | |
24 | ||
25 | /** | |
26 | * Filter for the methods viewer. | |
27 | * Changing a filter property does not trigger a refiltering of the viewer | |
28 | */ | |
29 | public class MemberFilter extends ViewerFilter { | |
30 | ||
31 | public static final int FILTER_NONPUBLIC= 1; | |
32 | public static final int FILTER_STATIC= 2; | |
33 | public static final int FILTER_FIELDS= 4; | |
34 | public static final int FILTER_LOCALTYPES= 8; | |
35 | ||
36 | private int fFilterProperties; | |
37 | ||
38 | ||
39 | /** | |
40 | * Modifies filter and add a property to filter for | |
41 | * @param filter the filter to add | |
42 | */ | |
43 | public final void addFilter(int filter) { | |
44 | fFilterProperties |= filter; | |
45 | } | |
46 | /** | |
47 | * Modifies filter and remove a property to filter for | |
48 | * @param filter the filter to remove | |
49 | */ | |
50 | public final void removeFilter(int filter) { | |
51 | fFilterProperties &= (-1 ^ filter); | |
52 | } | |
53 | /** | |
54 | * Tests if a property is filtered | |
55 | * @param filter the filter to test | |
56 | * @return returns the result of the test | |
57 | */ | |
58 | public final boolean hasFilter(int filter) { | |
59 | return (fFilterProperties & filter) != 0; | |
60 | } | |
61 | ||
62 | /* | |
63 | * @see ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) | |
64 | */ | |
65 | @Override | |
66 | public boolean select(Viewer viewer, Object parentElement, Object element) { | |
67 | try { | |
68 | if (element instanceof IMember) { | |
69 | IMember member= (IMember) element; | |
70 | int memberType= member.getElementType(); | |
71 | ||
72 | if (hasFilter(FILTER_FIELDS) && memberType == IJavaElement.FIELD) { | |
73 | return false; | |
74 | } | |
75 | ||
76 | if (hasFilter(FILTER_LOCALTYPES) && memberType == IJavaElement.TYPE && isLocalType((IType) member)) { | |
77 | return false; | |
78 | } | |
79 | ||
80 | if (member.getElementName().startsWith("<")) { // filter out <clinit> //$NON-NLS-1$ | |
81 | return false; | |
82 | } | |
83 | int flags= member.getFlags(); | |
84 | if (hasFilter(FILTER_STATIC) && (Flags.isStatic(flags) || isFieldInInterfaceOrAnnotation(member)) && memberType != IJavaElement.TYPE) { | |
85 | return false; | |
86 | } | |
87 | if (hasFilter(FILTER_NONPUBLIC) && !Flags.isPublic(flags) && !isMemberInInterfaceOrAnnotation(member) && !isTopLevelType(member) && !isEnumConstant(member)) { | |
88 | return false; | |
89 | } | |
90 | } | |
91 | } catch (JavaModelException e) { | |
92 | // ignore | |
93 | } | |
94 | return true; | |
95 | } | |
96 | ||
97 | private boolean isLocalType(IType type) { | |
98 | IJavaElement parent= type.getParent(); | |
99 | return parent instanceof IMember && !(parent instanceof IType); | |
100 | } | |
101 | ||
102 | private boolean isMemberInInterfaceOrAnnotation(IMember member) throws JavaModelException { | |
103 | IType parent= member.getDeclaringType(); | |
104 | return parent != null && JavaModelUtil.isInterfaceOrAnnotation(parent); | |
105 | } | |
106 | ||
107 | private boolean isFieldInInterfaceOrAnnotation(IMember member) throws JavaModelException { | |
108 | return (member.getElementType() == IJavaElement.FIELD) && JavaModelUtil.isInterfaceOrAnnotation(member.getDeclaringType()); | |
109 | } | |
110 | ||
111 | private boolean isTopLevelType(IMember member) { | |
112 | IType parent= member.getDeclaringType(); | |
113 | return parent == null; | |
114 | } | |
115 | ||
116 | private boolean isEnumConstant(IMember member) throws JavaModelException { | |
117 | return (member.getElementType() == IJavaElement.FIELD) && ((IField)member).isEnumConstant(); | |
118 | } | |
119 | } |