net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/MemberFilter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.viewsupport;
  12
  13 import net.sourceforge.phpdt.core.Flags;
  14 import net.sourceforge.phpdt.core.IField;
  15 import net.sourceforge.phpdt.core.IJavaElement;
  16 import net.sourceforge.phpdt.core.IMember;
  17 import net.sourceforge.phpdt.core.IType;
  18 import net.sourceforge.phpdt.core.JavaModelException;
  19
  20 import org.eclipse.jface.viewers.Viewer;
  21 import org.eclipse.jface.viewers.ViewerFilter;
  22
  23 /**
  24  * Filter for the methods viewer.
  25  * Changing a filter property does not trigger a refiltering of the viewer
  26  */
  27 public class MemberFilter extends ViewerFilter {
  28
  29         public static final int FILTER_NONPUBLIC= 1;
  30         public static final int FILTER_STATIC= 2;
  31         public static final int FILTER_FIELDS= 4;
  32
  33         private int fFilterProperties;
  34
  35         /**
  36          * Modifies filter and add a property to filter for
  37          */
  38         public final void addFilter(int filter) {
  39                 fFilterProperties |= filter;
  40         }
  41         /**
  42          * Modifies filter and remove a property to filter for
  43          */
  44         public final void removeFilter(int filter) {
  45                 fFilterProperties &= (-1 ^ filter);
  46         }
  47         /**
  48          * Tests if a property is filtered
  49          */
  50         public final boolean hasFilter(int filter) {
  51                 return (fFilterProperties & filter) != 0;
  52         }
  53
  54         /*
  55          * @see ViewerFilter@isFilterProperty
  56          */
  57         public boolean isFilterProperty(Object element, Object property) {
  58                 return false;
  59         }
  60         /*
  61          * @see ViewerFilter@select
  62          */
  63         public boolean select(Viewer viewer, Object parentElement, Object element) {
  64                 try {
  65                         if (hasFilter(FILTER_FIELDS) && element instanceof IField) {
  66                                 return false;
  67                         }
  68                         if (element instanceof IMember) {
  69                                 IMember member= (IMember)element;
  70                                 if (member.getElementName().startsWith("<")) { // filter out <clinit> //$NON-NLS-1$
  71                                         return false;
  72                                 }
  73                                 int flags= member.getFlags();
  74                                 if (hasFilter(FILTER_STATIC) && (Flags.isStatic(flags) || isFieldInInterface(member)) && member.getElementType() != IJavaElement.TYPE) {
  75                                         return false;
  76                                 }
  77                                 if (hasFilter(FILTER_NONPUBLIC) && !Flags.isPublic(flags) && !isMemberInInterface(member) && !isTopLevelType(member)) {
  78                                         return false;
  79                                 }
  80                         }
  81                 } catch (JavaModelException e) {
  82                         // ignore
  83                 }
  84                 return true;
  85         }
  86
  87         private boolean isMemberInInterface(IMember member) throws JavaModelException {
  88                 IType parent= member.getDeclaringType();
  89                 return parent != null && parent.isInterface();
  90         }
  91
  92         private boolean isFieldInInterface(IMember member) throws JavaModelException {
  93                 return (member.getElementType() == IJavaElement.FIELD) && member.getDeclaringType().isInterface();
  94         }
  95
  96         private boolean isTopLevelType(IMember member) throws JavaModelException {
  97                 IType parent= member.getDeclaringType();
  98                 return parent == null;
  99         }
 100 }