//--------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// Neither the name of the Drew Davidson nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
//--------------------------------------------------------------------------
package org.apache.ibatis.ognl;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Member;
import java.lang.reflect.Modifier;
import java.util.Map;
/**
* This class provides methods for setting up and restoring
* access in a Field. Java 2 provides access utilities for setting
* and getting fields that are non-public. This object provides
* coarse-grained access controls to allow access to private, protected
* and package protected members. This will apply to all classes
* and members.
*
* @author Luke Blanshard (blanshlu@netscape.net)
* @author Drew Davidson (drew@ognl.org)
* @version 15 October 1999
*/
public class DefaultMemberAccess implements MemberAccess {
public boolean allowPrivateAccess = false;
public boolean allowProtectedAccess = false;
public boolean allowPackageProtectedAccess = false;
/*===================================================================
Constructors
===================================================================*/
public DefaultMemberAccess(boolean allowAllAccess) {
this(allowAllAccess, allowAllAccess, allowAllAccess);
}
public DefaultMemberAccess(boolean allowPrivateAccess, boolean allowProtectedAccess, boolean allowPackageProtectedAccess) {
super();
this.allowPrivateAccess = allowPrivateAccess;
this.allowProtectedAccess = allowProtectedAccess;
this.allowPackageProtectedAccess = allowPackageProtectedAccess;
}
/*===================================================================
Public methods
===================================================================*/
public boolean getAllowPrivateAccess() {
return allowPrivateAccess;
}
public void setAllowPrivateAccess(boolean value) {
allowPrivateAccess = value;
}
public boolean getAllowProtectedAccess() {
return allowProtectedAccess;
}
public void setAllowProtectedAccess(boolean value) {
allowProtectedAccess = value;
}
public boolean getAllowPackageProtectedAccess() {
return allowPackageProtectedAccess;
}
public void setAllowPackageProtectedAccess(boolean value) {
allowPackageProtectedAccess = value;
}
/*===================================================================
MemberAccess interface
===================================================================*/
public Object setup(Map context, Object target, Member member, String propertyName) {
Object result = null;
if (isAccessible(context, target, member, propertyName)) {
AccessibleObject accessible = (AccessibleObject) member;
if (!accessible.isAccessible()) {
result = Boolean.TRUE;
accessible.setAccessible(true);
}
}
return result;
}
public void restore(Map context, Object target, Member member, String propertyName, Object state) {
if (state != null) {
((AccessibleObject) member).setAccessible(((Boolean) state).booleanValue());
}
}
/**
* Returns true if the given member is accessible or can be made accessible
* by this object.
*/
public boolean isAccessible(Map context, Object target, Member member, String propertyName) {
int modifiers = member.getModifiers();
boolean result = Modifier.isPublic(modifiers);
if (!result) {
if (Modifier.isPrivate(modifiers)) {
result = getAllowPrivateAccess();
} else {
if (Modifier.isProtected(modifiers)) {
result = getAllowProtectedAccess();
} else {
result = getAllowPackageProtectedAccess();
}
}
}
return result;
}
}