| /* |
| * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.tools.util; |
| |
| import sun.tools.java.*; |
| |
| |
| /** |
| * A class whose instances are filters over Modifier bits. |
| * Filtering is done by returning boolean values. |
| * Classes, methods and fields can be filtered, or filtering |
| * can be done directly on modifier bits. |
| * |
| * WARNING: The contents of this source file are not part of any |
| * supported API. Code that depends on them does so at its own risk: |
| * they are subject to change or removal without notice. |
| * |
| * @see java.lang.reflect.Modifier |
| * @author Robert Field |
| */ |
| |
| public |
| class ModifierFilter extends java.lang.reflect.Modifier { |
| |
| /** |
| * Package private access. |
| * A "pseudo-" modifier bit that can be used in the |
| * constructors of this class to specify package private |
| * access. This is needed since there is no Modifier.PACKAGE. |
| */ |
| public static final long PACKAGE = 0x8000000000000000L; |
| |
| /** |
| * All access modifiers. |
| * A short-hand set of modifier bits that can be used in the |
| * constructors of this class to specify all access modifiers, |
| * Same as PRIVATE | PROTECTED | PUBLIC | PACKAGE. |
| */ |
| public static final long ALL_ACCESS = |
| PRIVATE | PROTECTED | PUBLIC | PACKAGE; |
| |
| private long oneOf; |
| private long must; |
| private long cannot; |
| |
| private static final int ACCESS_BITS = PRIVATE | PROTECTED | PUBLIC; |
| |
| /** |
| * Constructor - Specify a filter. |
| * |
| * @param oneOf If zero, everything passes the filter. |
| * If non-zero, at least one of the specified |
| * bits must be on in the modifier bits to |
| * pass the filter. |
| */ |
| public |
| ModifierFilter(long oneOf) { |
| this(oneOf, 0, 0); |
| } |
| |
| /** |
| * Constructor - Specify a filter. |
| * For example, the filter below will only pass synchronized |
| * methods that are private or package private access and are |
| * not native or static. |
| * <pre> |
| * ModifierFilter( Modifier.PRIVATE | ModifierFilter.PACKAGE, |
| * Modifier.SYNCHRONIZED, |
| * Modifier.NATIVE | Modifier.STATIC) |
| * </pre><p> |
| * Each of the three arguments must either be |
| * zero or the or'ed combination of the bits specified in the |
| * class Modifier or this class. During filtering, these values |
| * are compared against the modifier bits as follows: |
| * |
| * @param oneOf If zero, ignore this argument. |
| * If non-zero, at least one of the bits must be on. |
| * @param must All bits specified must be on. |
| * @param cannot None of the bits specified can be on. |
| */ |
| public |
| ModifierFilter(long oneOf, long must, long cannot) { |
| this.oneOf = oneOf; |
| this.must = must; |
| this.cannot = cannot; |
| } |
| |
| /** |
| * Filter on modifier bits. |
| * |
| * @param modifierBits Bits as specified in the Modifier class |
| * |
| * @return Whether the modifierBits pass this filter. |
| */ |
| public boolean checkModifier(int modifierBits) { |
| // Add in the "pseudo-" modifier bit PACKAGE, if needed |
| long fmod = ((modifierBits & ACCESS_BITS) == 0) ? |
| modifierBits | PACKAGE : |
| modifierBits; |
| return ((oneOf == 0) || ((oneOf & fmod) != 0)) && |
| ((must & fmod) == must) && |
| ((cannot & fmod) == 0); |
| } |
| |
| /** |
| * Filter a MemberDefinition. |
| * |
| * @param field A MemberDefinition |
| * |
| * @return Whether the modifier of the field |
| * passes this filter. |
| * |
| * @see sun.tools.MemberDefinition |
| */ |
| public boolean checkMember(MemberDefinition field) { |
| return checkModifier(field.getModifiers()); |
| } |
| |
| /** |
| * Filter a ClassDefinition. |
| * |
| * @param cdef A ClassDefinition |
| * |
| * @return Whether the modifier of the class |
| * passes this filter. |
| * |
| * @see sun.tools.ClassDefinition |
| */ |
| public boolean checkClass(ClassDefinition cdef) { |
| return checkModifier(cdef.getModifiers()); |
| } |
| |
| } // end ModifierFilter |