001: //--------------------------------------------------------------------------
002: // Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
003: // All rights reserved.
004: //
005: // Redistribution and use in source and binary forms, with or without
006: // modification, are permitted provided that the following conditions are
007: // met:
008: //
009: // Redistributions of source code must retain the above copyright notice,
010: // this list of conditions and the following disclaimer.
011: // Redistributions in binary form must reproduce the above copyright
012: // notice, this list of conditions and the following disclaimer in the
013: // documentation and/or other materials provided with the distribution.
014: // Neither the name of the Drew Davidson nor the names of its contributors
015: // may be used to endorse or promote products derived from this software
016: // without specific prior written permission.
017: //
018: // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
019: // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
020: // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
021: // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
022: // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
023: // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
024: // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
025: // OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026: // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
027: // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
028: // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
029: // DAMAGE.
030: //--------------------------------------------------------------------------
031: package ognl;
032:
033: import java.lang.reflect.*;
034: import java.util.*;
035:
036: /**
037: * This class provides methods for setting up and restoring
038: * access in a Field. Java 2 provides access utilities for setting
039: * and getting fields that are non-public. This object provides
040: * coarse-grained access controls to allow access to private, protected
041: * and package protected members. This will apply to all classes
042: * and members.
043: *
044: * @author Luke Blanshard (blanshlu@netscape.net)
045: * @author Drew Davidson (drew@ognl.org)
046: * @version 15 October 1999
047: */
048: public class DefaultMemberAccess implements MemberAccess {
049: public boolean allowPrivateAccess = false;
050: public boolean allowProtectedAccess = false;
051: public boolean allowPackageProtectedAccess = false;
052:
053: /*===================================================================
054: Constructors
055: ===================================================================*/
056: public DefaultMemberAccess(boolean allowAllAccess) {
057: this (allowAllAccess, allowAllAccess, allowAllAccess);
058: }
059:
060: public DefaultMemberAccess(boolean allowPrivateAccess,
061: boolean allowProtectedAccess,
062: boolean allowPackageProtectedAccess) {
063: super ();
064: this .allowPrivateAccess = allowPrivateAccess;
065: this .allowProtectedAccess = allowProtectedAccess;
066: this .allowPackageProtectedAccess = allowPackageProtectedAccess;
067: }
068:
069: /*===================================================================
070: Public methods
071: ===================================================================*/
072: public boolean getAllowPrivateAccess() {
073: return allowPrivateAccess;
074: }
075:
076: public void setAllowPrivateAccess(boolean value) {
077: allowPrivateAccess = value;
078: }
079:
080: public boolean getAllowProtectedAccess() {
081: return allowProtectedAccess;
082: }
083:
084: public void setAllowProtectedAccess(boolean value) {
085: allowProtectedAccess = value;
086: }
087:
088: public boolean getAllowPackageProtectedAccess() {
089: return allowPackageProtectedAccess;
090: }
091:
092: public void setAllowPackageProtectedAccess(boolean value) {
093: allowPackageProtectedAccess = value;
094: }
095:
096: /*===================================================================
097: MemberAccess interface
098: ===================================================================*/
099: public Object setup(Map context, Object target, Member member,
100: String propertyName) {
101: Object result = null;
102:
103: if (isAccessible(context, target, member, propertyName)) {
104: AccessibleObject accessible = (AccessibleObject) member;
105:
106: if (!accessible.isAccessible()) {
107: result = Boolean.TRUE;
108: accessible.setAccessible(true);
109: }
110: }
111: return result;
112: }
113:
114: public void restore(Map context, Object target, Member member,
115: String propertyName, Object state) {
116: if (state != null) {
117: ((AccessibleObject) member).setAccessible(((Boolean) state)
118: .booleanValue());
119: }
120: }
121:
122: /**
123: Returns true if the given member is accessible or can be made accessible
124: by this object.
125: */
126: public boolean isAccessible(Map context, Object target,
127: Member member, String propertyName) {
128: int modifiers = member.getModifiers();
129: boolean result = Modifier.isPublic(modifiers);
130:
131: if (!result) {
132: if (Modifier.isPrivate(modifiers)) {
133: result = getAllowPrivateAccess();
134: } else {
135: if (Modifier.isProtected(modifiers)) {
136: result = getAllowProtectedAccess();
137: } else {
138: result = getAllowPackageProtectedAccess();
139: }
140: }
141: }
142: return result;
143: }
144: }
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