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Java example source code file (MBeanPermission.java)
This example Java source code file (MBeanPermission.java) is included in the alvinalexander.com
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The MBeanPermission.java Java example source code
/*
* Copyright (c) 2002, 2008, 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 javax.management;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.security.Permission;
/**
* <p>Permission controlling access to MBeanServer operations. If a
* security manager has been set using {@link
* System#setSecurityManager}, most operations on the MBean Server
* require that the caller's permissions imply an MBeanPermission
* appropriate for the operation. This is described in detail in the
* documentation for the {@link MBeanServer} interface.</p>
*
* <p>As with other {@link Permission} objects, an MBeanPermission can
* represent either a permission that you <em>have or a
* permission that you <em>need. When a sensitive operation is
* being checked for permission, an MBeanPermission is constructed
* representing the permission you need. The operation is only
* allowed if the permissions you have {@linkplain #implies imply} the
* permission you need.</p>
*
* <p>An MBeanPermission contains four items of information:
*
* <ul>
*
* <li>The action. For a permission you need,
* this is one of the actions in the list <a
* href="#action-list">below</a>. For a permission you have, this is
* a comma-separated list of those actions, or <code>*,
* representing all actions.</p>
*
* <p>The action is returned by {@link #getActions()}.
*
* <li>The class name.
*
* <p>For a permission you need, this is the class name of an MBean
* you are accessing, as returned by {@link
* MBeanServer#getMBeanInfo(ObjectName)
* MBeanServer.getMBeanInfo(name)}.{@link MBeanInfo#getClassName()
* getClassName()}. Certain operations do not reference a class name,
* in which case the class name is null.</p>
*
* <p>For a permission you have, this is either empty or a class
* name pattern</em>. A class name pattern is a string following the
* Java conventions for dot-separated class names. It may end with
* "<code>.*" meaning that the permission grants access to any
* class that begins with the string preceding "<code>.*". For
* instance, "<code>javax.management.*" grants access to
* <code>javax.management.MBeanServerDelegate and
* <code>javax.management.timer.Timer, among other classes.
*
* <p>A class name pattern can also be empty or the single character
* "<code>*", both of which grant access to any class.
*
* <li>The member.
*
* <p>For a permission you need, this is the name of the attribute or
* operation you are accessing. For operations that do not reference
* an attribute or operation, the member is null.</p>
*
* <p>For a permission you have, this is either the name of an attribute
* or operation you can access, or it is empty or the single character
* "<code>*", both of which grant access to any member.
*
* <li id="MBeanName">The object name.
*
* <p>For a permission you need, this is the {@link ObjectName} of the
* MBean you are accessing. For operations that do not reference a
* single MBean, it is null. It is never an object name pattern.</p>
*
* <p>For a permission you have, this is the {@link ObjectName} of the
* MBean or MBeans you can access. It may be an object name pattern
* to grant access to all MBeans whose names match the pattern. It
* may also be empty, which grants access to all MBeans whatever their
* name.</p>
*
* </ul>
*
* <p>If you have an MBeanPermission, it allows operations only if all
* four of the items match.</p>
*
* <p>The class name, member, and object name can be written together
* as a single string, which is the <em>name of this permission.
* The name of the permission is the string returned by {@link
* Permission#getName() getName()}. The format of the string is:</p>
*
* <blockquote>
* <code>className#member[objectName]
* </blockquote>
*
* <p>The object name is written using the usual syntax for {@link
* ObjectName}. It may contain any legal characters, including
* <code>]. It is terminated by a ] character
* that is the last character in the string.</p>
*
* <p>One or more of the className, member,
* or <code>objectName may be omitted. If the
* <code>member is omitted, the # may be too (but
* does not have to be). If the <code>objectName is omitted,
* the <code>[] may be too (but does not have to be). It is
* not legal to omit all three items, that is to have a <em>name
* that is the empty string.</p>
*
* <p>One or more of the className, member,
* or <code>objectName may be the character "-",
* which is equivalent to a null value. A null value is implied by
* any value (including another null value) but does not imply any
* other value.</p>
*
* <p>The possible actions are these:
*
* <ul>
* <li>addNotificationListener
* <li>getAttribute
* <li>getClassLoader
* <li>getClassLoaderFor
* <li>getClassLoaderRepository
* <li>getDomains
* <li>getMBeanInfo
* <li>getObjectInstance
* <li>instantiate
* <li>invoke
* <li>isInstanceOf
* <li>queryMBeans
* <li>queryNames
* <li>registerMBean
* <li>removeNotificationListener
* <li>setAttribute
* <li>unregisterMBean
* </ul>
*
* <p>In a comma-separated list of actions, spaces are allowed before
* and after each action.</p>
*
* @since 1.5
*/
public class MBeanPermission extends Permission {
private static final long serialVersionUID = -2416928705275160661L;
/**
* Actions list.
*/
private static final int AddNotificationListener = 0x00001;
private static final int GetAttribute = 0x00002;
private static final int GetClassLoader = 0x00004;
private static final int GetClassLoaderFor = 0x00008;
private static final int GetClassLoaderRepository = 0x00010;
private static final int GetDomains = 0x00020;
private static final int GetMBeanInfo = 0x00040;
private static final int GetObjectInstance = 0x00080;
private static final int Instantiate = 0x00100;
private static final int Invoke = 0x00200;
private static final int IsInstanceOf = 0x00400;
private static final int QueryMBeans = 0x00800;
private static final int QueryNames = 0x01000;
private static final int RegisterMBean = 0x02000;
private static final int RemoveNotificationListener = 0x04000;
private static final int SetAttribute = 0x08000;
private static final int UnregisterMBean = 0x10000;
/**
* No actions.
*/
private static final int NONE = 0x00000;
/**
* All actions.
*/
private static final int ALL =
AddNotificationListener |
GetAttribute |
GetClassLoader |
GetClassLoaderFor |
GetClassLoaderRepository |
GetDomains |
GetMBeanInfo |
GetObjectInstance |
Instantiate |
Invoke |
IsInstanceOf |
QueryMBeans |
QueryNames |
RegisterMBean |
RemoveNotificationListener |
SetAttribute |
UnregisterMBean;
/**
* The actions string.
*/
private String actions;
/**
* The actions mask.
*/
private transient int mask;
/**
* The classname prefix that must match. If null, is implied by any
* classNamePrefix but does not imply any non-null classNamePrefix.
*/
private transient String classNamePrefix;
/**
* True if classNamePrefix must match exactly. Otherwise, the
* className being matched must start with classNamePrefix.
*/
private transient boolean classNameExactMatch;
/**
* The member that must match. If null, is implied by any member
* but does not imply any non-null member.
*/
private transient String member;
/**
* The objectName that must match. If null, is implied by any
* objectName but does not imply any non-null objectName.
*/
private transient ObjectName objectName;
/**
* Parse <code>actions parameter.
*/
private void parseActions() {
int mask;
if (actions == null)
throw new IllegalArgumentException("MBeanPermission: " +
"actions can't be null");
if (actions.equals(""))
throw new IllegalArgumentException("MBeanPermission: " +
"actions can't be empty");
mask = getMask(actions);
if ((mask & ALL) != mask)
throw new IllegalArgumentException("Invalid actions mask");
if (mask == NONE)
throw new IllegalArgumentException("Invalid actions mask");
this.mask = mask;
}
/**
* Parse <code>name parameter.
*/
private void parseName() {
String name = getName();
if (name == null)
throw new IllegalArgumentException("MBeanPermission name " +
"cannot be null");
if (name.equals(""))
throw new IllegalArgumentException("MBeanPermission name " +
"cannot be empty");
/* The name looks like "class#member[objectname]". We subtract
elements from the right as we parse, so after parsing the
objectname we have "class#member" and after parsing the
member we have "class". Each element is optional. */
// Parse ObjectName
int openingBracket = name.indexOf("[");
if (openingBracket == -1) {
// If "[on]" missing then ObjectName("*:*")
//
objectName = ObjectName.WILDCARD;
} else {
if (!name.endsWith("]")) {
throw new IllegalArgumentException("MBeanPermission: " +
"The ObjectName in the " +
"target name must be " +
"included in square " +
"brackets");
} else {
// Create ObjectName
//
try {
// If "[]" then ObjectName("*:*")
//
String on = name.substring(openingBracket + 1,
name.length() - 1);
if (on.equals(""))
objectName = ObjectName.WILDCARD;
else if (on.equals("-"))
objectName = null;
else
objectName = new ObjectName(on);
} catch (MalformedObjectNameException e) {
throw new IllegalArgumentException("MBeanPermission: " +
"The target name does " +
"not specify a valid " +
"ObjectName", e);
}
}
name = name.substring(0, openingBracket);
}
// Parse member
int poundSign = name.indexOf("#");
if (poundSign == -1)
setMember("*");
else {
String memberName = name.substring(poundSign + 1);
setMember(memberName);
name = name.substring(0, poundSign);
}
// Parse className
setClassName(name);
}
/**
* Assign fields based on className, member, and objectName
* parameters.
*/
private void initName(String className, String member,
ObjectName objectName) {
setClassName(className);
setMember(member);
this.objectName = objectName;
}
private void setClassName(String className) {
if (className == null || className.equals("-")) {
classNamePrefix = null;
classNameExactMatch = false;
} else if (className.equals("") || className.equals("*")) {
classNamePrefix = "";
classNameExactMatch = false;
} else if (className.endsWith(".*")) {
// Note that we include the "." in the required prefix
classNamePrefix = className.substring(0, className.length() - 1);
classNameExactMatch = false;
} else {
classNamePrefix = className;
classNameExactMatch = true;
}
}
private void setMember(String member) {
if (member == null || member.equals("-"))
this.member = null;
else if (member.equals(""))
this.member = "*";
else
this.member = member;
}
/**
* <p>Create a new MBeanPermission object with the specified target name
* and actions.</p>
*
* <p>The target name is of the form
* "<code>className#member[objectName]" where each part is
* optional. It must not be empty or null.</p>
*
* <p>The actions parameter contains a comma-separated list of the
* desired actions granted on the target name. It must not be
* empty or null.</p>
*
* @param name the triplet "className#member[objectName]".
* @param actions the action string.
*
* @exception IllegalArgumentException if the <code>name or
* <code>actions is invalid.
*/
public MBeanPermission(String name, String actions) {
super(name);
parseName();
this.actions = actions;
parseActions();
}
/**
* <p>Create a new MBeanPermission object with the specified target name
* (class name, member, object name) and actions.</p>
*
* <p>The class name, member and object name parameters define a
* target name of the form
* "<code>className#member[objectName]" where each part is
* optional. This will be the result of {@link #getName()} on the
* resultant MBeanPermission.</p>
*
* <p>The actions parameter contains a comma-separated list of the
* desired actions granted on the target name. It must not be
* empty or null.</p>
*
* @param className the class name to which this permission applies.
* May be null or <code>"-", which represents a class name
* that is implied by any class name but does not imply any other
* class name.
* @param member the member to which this permission applies. May
* be null or <code>"-", which represents a member that is
* implied by any member but does not imply any other member.
* @param objectName the object name to which this permission
* applies. May be null, which represents an object name that is
* implied by any object name but does not imply any other object
* name.
* @param actions the action string.
*/
public MBeanPermission(String className,
String member,
ObjectName objectName,
String actions) {
super(makeName(className, member, objectName));
initName(className, member, objectName);
this.actions = actions;
parseActions();
}
private static String makeName(String className, String member,
ObjectName objectName) {
final StringBuilder name = new StringBuilder();
if (className == null)
className = "-";
name.append(className);
if (member == null)
member = "-";
name.append("#" + member);
if (objectName == null)
name.append("[-]");
else
name.append("[").append(objectName.getCanonicalName()).append("]");
/* In the interests of legibility for Permission.toString(), we
transform the empty string into "*". */
if (name.length() == 0)
return "*";
else
return name.toString();
}
/**
* Returns the "canonical string representation" of the actions. That is,
* this method always returns present actions in alphabetical order.
*
* @return the canonical string representation of the actions.
*/
public String getActions() {
if (actions == null)
actions = getActions(this.mask);
return actions;
}
/**
* Returns the "canonical string representation"
* of the actions from the mask.
*/
private static String getActions(int mask) {
final StringBuilder sb = new StringBuilder();
boolean comma = false;
if ((mask & AddNotificationListener) == AddNotificationListener) {
comma = true;
sb.append("addNotificationListener");
}
if ((mask & GetAttribute) == GetAttribute) {
if (comma) sb.append(',');
else comma = true;
sb.append("getAttribute");
}
if ((mask & GetClassLoader) == GetClassLoader) {
if (comma) sb.append(',');
else comma = true;
sb.append("getClassLoader");
}
if ((mask & GetClassLoaderFor) == GetClassLoaderFor) {
if (comma) sb.append(',');
else comma = true;
sb.append("getClassLoaderFor");
}
if ((mask & GetClassLoaderRepository) == GetClassLoaderRepository) {
if (comma) sb.append(',');
else comma = true;
sb.append("getClassLoaderRepository");
}
if ((mask & GetDomains) == GetDomains) {
if (comma) sb.append(',');
else comma = true;
sb.append("getDomains");
}
if ((mask & GetMBeanInfo) == GetMBeanInfo) {
if (comma) sb.append(',');
else comma = true;
sb.append("getMBeanInfo");
}
if ((mask & GetObjectInstance) == GetObjectInstance) {
if (comma) sb.append(',');
else comma = true;
sb.append("getObjectInstance");
}
if ((mask & Instantiate) == Instantiate) {
if (comma) sb.append(',');
else comma = true;
sb.append("instantiate");
}
if ((mask & Invoke) == Invoke) {
if (comma) sb.append(',');
else comma = true;
sb.append("invoke");
}
if ((mask & IsInstanceOf) == IsInstanceOf) {
if (comma) sb.append(',');
else comma = true;
sb.append("isInstanceOf");
}
if ((mask & QueryMBeans) == QueryMBeans) {
if (comma) sb.append(',');
else comma = true;
sb.append("queryMBeans");
}
if ((mask & QueryNames) == QueryNames) {
if (comma) sb.append(',');
else comma = true;
sb.append("queryNames");
}
if ((mask & RegisterMBean) == RegisterMBean) {
if (comma) sb.append(',');
else comma = true;
sb.append("registerMBean");
}
if ((mask & RemoveNotificationListener) == RemoveNotificationListener) {
if (comma) sb.append(',');
else comma = true;
sb.append("removeNotificationListener");
}
if ((mask & SetAttribute) == SetAttribute) {
if (comma) sb.append(',');
else comma = true;
sb.append("setAttribute");
}
if ((mask & UnregisterMBean) == UnregisterMBean) {
if (comma) sb.append(',');
else comma = true;
sb.append("unregisterMBean");
}
return sb.toString();
}
/**
* Returns the hash code value for this object.
*
* @return a hash code value for this object.
*/
public int hashCode() {
return this.getName().hashCode() + this.getActions().hashCode();
}
/**
* Converts an action String to an integer action mask.
*
* @param action the action string.
* @return the action mask.
*/
private static int getMask(String action) {
/*
* BE CAREFUL HERE! PARSING ORDER IS IMPORTANT IN THIS ALGORITHM.
*
* The 'string length' test must be performed for the lengthiest
* strings first.
*
* In this permission if the "unregisterMBean" string length test is
* performed after the "registerMBean" string length test the algorithm
* considers the 'unregisterMBean' action as being the 'registerMBean'
* action and a parsing error is returned.
*/
int mask = NONE;
if (action == null) {
return mask;
}
if (action.equals("*")) {
return ALL;
}
char[] a = action.toCharArray();
int i = a.length - 1;
if (i < 0)
return mask;
while (i != -1) {
char c;
// skip whitespace
while ((i!=-1) && ((c = a[i]) == ' ' ||
c == '\r' ||
c == '\n' ||
c == '\f' ||
c == '\t'))
i--;
// check for the known strings
int matchlen;
if (i >= 25 && /* removeNotificationListener */
(a[i-25] == 'r') &&
(a[i-24] == 'e') &&
(a[i-23] == 'm') &&
(a[i-22] == 'o') &&
(a[i-21] == 'v') &&
(a[i-20] == 'e') &&
(a[i-19] == 'N') &&
(a[i-18] == 'o') &&
(a[i-17] == 't') &&
(a[i-16] == 'i') &&
(a[i-15] == 'f') &&
(a[i-14] == 'i') &&
(a[i-13] == 'c') &&
(a[i-12] == 'a') &&
(a[i-11] == 't') &&
(a[i-10] == 'i') &&
(a[i-9] == 'o') &&
(a[i-8] == 'n') &&
(a[i-7] == 'L') &&
(a[i-6] == 'i') &&
(a[i-5] == 's') &&
(a[i-4] == 't') &&
(a[i-3] == 'e') &&
(a[i-2] == 'n') &&
(a[i-1] == 'e') &&
(a[i] == 'r')) {
matchlen = 26;
mask |= RemoveNotificationListener;
} else if (i >= 23 && /* getClassLoaderRepository */
(a[i-23] == 'g') &&
(a[i-22] == 'e') &&
(a[i-21] == 't') &&
(a[i-20] == 'C') &&
(a[i-19] == 'l') &&
(a[i-18] == 'a') &&
(a[i-17] == 's') &&
(a[i-16] == 's') &&
(a[i-15] == 'L') &&
(a[i-14] == 'o') &&
(a[i-13] == 'a') &&
(a[i-12] == 'd') &&
(a[i-11] == 'e') &&
(a[i-10] == 'r') &&
(a[i-9] == 'R') &&
(a[i-8] == 'e') &&
(a[i-7] == 'p') &&
(a[i-6] == 'o') &&
(a[i-5] == 's') &&
(a[i-4] == 'i') &&
(a[i-3] == 't') &&
(a[i-2] == 'o') &&
(a[i-1] == 'r') &&
(a[i] == 'y')) {
matchlen = 24;
mask |= GetClassLoaderRepository;
} else if (i >= 22 && /* addNotificationListener */
(a[i-22] == 'a') &&
(a[i-21] == 'd') &&
(a[i-20] == 'd') &&
(a[i-19] == 'N') &&
(a[i-18] == 'o') &&
(a[i-17] == 't') &&
(a[i-16] == 'i') &&
(a[i-15] == 'f') &&
(a[i-14] == 'i') &&
(a[i-13] == 'c') &&
(a[i-12] == 'a') &&
(a[i-11] == 't') &&
(a[i-10] == 'i') &&
(a[i-9] == 'o') &&
(a[i-8] == 'n') &&
(a[i-7] == 'L') &&
(a[i-6] == 'i') &&
(a[i-5] == 's') &&
(a[i-4] == 't') &&
(a[i-3] == 'e') &&
(a[i-2] == 'n') &&
(a[i-1] == 'e') &&
(a[i] == 'r')) {
matchlen = 23;
mask |= AddNotificationListener;
} else if (i >= 16 && /* getClassLoaderFor */
(a[i-16] == 'g') &&
(a[i-15] == 'e') &&
(a[i-14] == 't') &&
(a[i-13] == 'C') &&
(a[i-12] == 'l') &&
(a[i-11] == 'a') &&
(a[i-10] == 's') &&
(a[i-9] == 's') &&
(a[i-8] == 'L') &&
(a[i-7] == 'o') &&
(a[i-6] == 'a') &&
(a[i-5] == 'd') &&
(a[i-4] == 'e') &&
(a[i-3] == 'r') &&
(a[i-2] == 'F') &&
(a[i-1] == 'o') &&
(a[i] == 'r')) {
matchlen = 17;
mask |= GetClassLoaderFor;
} else if (i >= 16 && /* getObjectInstance */
(a[i-16] == 'g') &&
(a[i-15] == 'e') &&
(a[i-14] == 't') &&
(a[i-13] == 'O') &&
(a[i-12] == 'b') &&
(a[i-11] == 'j') &&
(a[i-10] == 'e') &&
(a[i-9] == 'c') &&
(a[i-8] == 't') &&
(a[i-7] == 'I') &&
(a[i-6] == 'n') &&
(a[i-5] == 's') &&
(a[i-4] == 't') &&
(a[i-3] == 'a') &&
(a[i-2] == 'n') &&
(a[i-1] == 'c') &&
(a[i] == 'e')) {
matchlen = 17;
mask |= GetObjectInstance;
} else if (i >= 14 && /* unregisterMBean */
(a[i-14] == 'u') &&
(a[i-13] == 'n') &&
(a[i-12] == 'r') &&
(a[i-11] == 'e') &&
(a[i-10] == 'g') &&
(a[i-9] == 'i') &&
(a[i-8] == 's') &&
(a[i-7] == 't') &&
(a[i-6] == 'e') &&
(a[i-5] == 'r') &&
(a[i-4] == 'M') &&
(a[i-3] == 'B') &&
(a[i-2] == 'e') &&
(a[i-1] == 'a') &&
(a[i] == 'n')) {
matchlen = 15;
mask |= UnregisterMBean;
} else if (i >= 13 && /* getClassLoader */
(a[i-13] == 'g') &&
(a[i-12] == 'e') &&
(a[i-11] == 't') &&
(a[i-10] == 'C') &&
(a[i-9] == 'l') &&
(a[i-8] == 'a') &&
(a[i-7] == 's') &&
(a[i-6] == 's') &&
(a[i-5] == 'L') &&
(a[i-4] == 'o') &&
(a[i-3] == 'a') &&
(a[i-2] == 'd') &&
(a[i-1] == 'e') &&
(a[i] == 'r')) {
matchlen = 14;
mask |= GetClassLoader;
} else if (i >= 12 && /* registerMBean */
(a[i-12] == 'r') &&
(a[i-11] == 'e') &&
(a[i-10] == 'g') &&
(a[i-9] == 'i') &&
(a[i-8] == 's') &&
(a[i-7] == 't') &&
(a[i-6] == 'e') &&
(a[i-5] == 'r') &&
(a[i-4] == 'M') &&
(a[i-3] == 'B') &&
(a[i-2] == 'e') &&
(a[i-1] == 'a') &&
(a[i] == 'n')) {
matchlen = 13;
mask |= RegisterMBean;
} else if (i >= 11 && /* getAttribute */
(a[i-11] == 'g') &&
(a[i-10] == 'e') &&
(a[i-9] == 't') &&
(a[i-8] == 'A') &&
(a[i-7] == 't') &&
(a[i-6] == 't') &&
(a[i-5] == 'r') &&
(a[i-4] == 'i') &&
(a[i-3] == 'b') &&
(a[i-2] == 'u') &&
(a[i-1] == 't') &&
(a[i] == 'e')) {
matchlen = 12;
mask |= GetAttribute;
} else if (i >= 11 && /* getMBeanInfo */
(a[i-11] == 'g') &&
(a[i-10] == 'e') &&
(a[i-9] == 't') &&
(a[i-8] == 'M') &&
(a[i-7] == 'B') &&
(a[i-6] == 'e') &&
(a[i-5] == 'a') &&
(a[i-4] == 'n') &&
(a[i-3] == 'I') &&
(a[i-2] == 'n') &&
(a[i-1] == 'f') &&
(a[i] == 'o')) {
matchlen = 12;
mask |= GetMBeanInfo;
} else if (i >= 11 && /* isInstanceOf */
(a[i-11] == 'i') &&
(a[i-10] == 's') &&
(a[i-9] == 'I') &&
(a[i-8] == 'n') &&
(a[i-7] == 's') &&
(a[i-6] == 't') &&
(a[i-5] == 'a') &&
(a[i-4] == 'n') &&
(a[i-3] == 'c') &&
(a[i-2] == 'e') &&
(a[i-1] == 'O') &&
(a[i] == 'f')) {
matchlen = 12;
mask |= IsInstanceOf;
} else if (i >= 11 && /* setAttribute */
(a[i-11] == 's') &&
(a[i-10] == 'e') &&
(a[i-9] == 't') &&
(a[i-8] == 'A') &&
(a[i-7] == 't') &&
(a[i-6] == 't') &&
(a[i-5] == 'r') &&
(a[i-4] == 'i') &&
(a[i-3] == 'b') &&
(a[i-2] == 'u') &&
(a[i-1] == 't') &&
(a[i] == 'e')) {
matchlen = 12;
mask |= SetAttribute;
} else if (i >= 10 && /* instantiate */
(a[i-10] == 'i') &&
(a[i-9] == 'n') &&
(a[i-8] == 's') &&
(a[i-7] == 't') &&
(a[i-6] == 'a') &&
(a[i-5] == 'n') &&
(a[i-4] == 't') &&
(a[i-3] == 'i') &&
(a[i-2] == 'a') &&
(a[i-1] == 't') &&
(a[i] == 'e')) {
matchlen = 11;
mask |= Instantiate;
} else if (i >= 10 && /* queryMBeans */
(a[i-10] == 'q') &&
(a[i-9] == 'u') &&
(a[i-8] == 'e') &&
(a[i-7] == 'r') &&
(a[i-6] == 'y') &&
(a[i-5] == 'M') &&
(a[i-4] == 'B') &&
(a[i-3] == 'e') &&
(a[i-2] == 'a') &&
(a[i-1] == 'n') &&
(a[i] == 's')) {
matchlen = 11;
mask |= QueryMBeans;
} else if (i >= 9 && /* getDomains */
(a[i-9] == 'g') &&
(a[i-8] == 'e') &&
(a[i-7] == 't') &&
(a[i-6] == 'D') &&
(a[i-5] == 'o') &&
(a[i-4] == 'm') &&
(a[i-3] == 'a') &&
(a[i-2] == 'i') &&
(a[i-1] == 'n') &&
(a[i] == 's')) {
matchlen = 10;
mask |= GetDomains;
} else if (i >= 9 && /* queryNames */
(a[i-9] == 'q') &&
(a[i-8] == 'u') &&
(a[i-7] == 'e') &&
(a[i-6] == 'r') &&
(a[i-5] == 'y') &&
(a[i-4] == 'N') &&
(a[i-3] == 'a') &&
(a[i-2] == 'm') &&
(a[i-1] == 'e') &&
(a[i] == 's')) {
matchlen = 10;
mask |= QueryNames;
} else if (i >= 5 && /* invoke */
(a[i-5] == 'i') &&
(a[i-4] == 'n') &&
(a[i-3] == 'v') &&
(a[i-2] == 'o') &&
(a[i-1] == 'k') &&
(a[i] == 'e')) {
matchlen = 6;
mask |= Invoke;
} else {
// parse error
throw new IllegalArgumentException("Invalid permission: " +
action);
}
// make sure we didn't just match the tail of a word
// like "ackbarfaccept". Also, skip to the comma.
boolean seencomma = false;
while (i >= matchlen && !seencomma) {
switch(a[i-matchlen]) {
case ',':
seencomma = true;
break;
case ' ': case '\r': case '\n':
case '\f': case '\t':
break;
default:
throw new IllegalArgumentException("Invalid permission: " +
action);
}
i--;
}
// point i at the location of the comma minus one (or -1).
i -= matchlen;
}
return mask;
}
/**
* <p>Checks if this MBeanPermission object "implies" the
* specified permission.</p>
*
* <p>More specifically, this method returns true if:
*
* <ul>
*
* <li> p is an instance of MBeanPermission; and
*
* <li> p has a null className or p's className
* matches this object's className; and</li>
*
* <li> p has a null member or p's member matches this
* object's member; and</li>
*
* <li> p has a null object name or p's
* object name matches this object's object name; and</li>
*
* <li> p's actions are a subset of this object's actions
*
* </ul>
*
* <p>If this object's className is "*", p's
* className always matches it. If it is "<code>a.*", p's
* className matches it if it begins with "<code>a.".
*
* <p>If this object's member is "*", p's
* member always matches it.</p>
*
* <p>If this object's objectName n1 is an object name pattern,
* <i>p's objectName n2 matches it if
* {@link ObjectName#equals <i>n1.equals(n2)} or if
* {@link ObjectName#apply <i>n1.apply(n2)}.
*
* <p>A permission that includes the queryMBeans action
* is considered to include <code>queryNames as well.
*
* @param p the permission to check against.
* @return true if the specified permission is implied by this object,
* false if not.
*/
public boolean implies(Permission p) {
if (!(p instanceof MBeanPermission))
return false;
MBeanPermission that = (MBeanPermission) p;
// Actions
//
// The actions in 'this' permission must be a
// superset of the actions in 'that' permission
//
/* "queryMBeans" implies "queryNames" */
if ((this.mask & QueryMBeans) == QueryMBeans) {
if (((this.mask | QueryNames) & that.mask) != that.mask) {
//System.out.println("action [with QueryNames] does not imply");
return false;
}
} else {
if ((this.mask & that.mask) != that.mask) {
//System.out.println("action does not imply");
return false;
}
}
// Target name
//
// The 'className' check is true iff:
// 1) the className in 'this' permission is omitted or "*", or
// 2) the className in 'that' permission is omitted or "*", or
// 3) the className in 'this' permission does pattern
// matching with the className in 'that' permission.
//
// The 'member' check is true iff:
// 1) the member in 'this' permission is omitted or "*", or
// 2) the member in 'that' permission is omitted or "*", or
// 3) the member in 'this' permission equals the member in
// 'that' permission.
//
// The 'object name' check is true iff:
// 1) the object name in 'this' permission is omitted or "*:*", or
// 2) the object name in 'that' permission is omitted or "*:*", or
// 3) the object name in 'this' permission does pattern
// matching with the object name in 'that' permission.
//
/* Check if this.className implies that.className.
If that.classNamePrefix is empty that means the className is
irrelevant for this permission check. Otherwise, we do not
expect that "that" contains a wildcard, since it is a
needed permission. So we assume that.classNameExactMatch. */
if (that.classNamePrefix == null) {
// bottom is implied
} else if (this.classNamePrefix == null) {
// bottom implies nothing but itself
return false;
} else if (this.classNameExactMatch) {
if (!that.classNameExactMatch)
return false; // exact never implies wildcard
if (!that.classNamePrefix.equals(this.classNamePrefix))
return false; // exact match fails
} else {
// prefix match, works even if "that" is also a wildcard
// e.g. a.* implies a.* and a.b.*
if (!that.classNamePrefix.startsWith(this.classNamePrefix))
return false;
}
/* Check if this.member implies that.member */
if (that.member == null) {
// bottom is implied
} else if (this.member == null) {
// bottom implies nothing but itself
return false;
} else if (this.member.equals("*")) {
// wildcard implies everything (including itself)
} else if (!this.member.equals(that.member)) {
return false;
}
/* Check if this.objectName implies that.objectName */
if (that.objectName == null) {
// bottom is implied
} else if (this.objectName == null) {
// bottom implies nothing but itself
return false;
} else if (!this.objectName.apply(that.objectName)) {
/* ObjectName.apply returns false if that.objectName is a
wildcard so we also allow equals for that case. This
never happens during real permission checks, but means
the implies relation is reflexive. */
if (!this.objectName.equals(that.objectName))
return false;
}
return true;
}
/**
* Checks two MBeanPermission objects for equality. Checks
* that <i>obj is an MBeanPermission, and has the same
* name and actions as this object.
* <P>
* @param obj the object we are testing for equality with this object.
* @return true if obj is an MBeanPermission, and has the
* same name and actions as this MBeanPermission object.
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (! (obj instanceof MBeanPermission))
return false;
MBeanPermission that = (MBeanPermission) obj;
return (this.mask == that.mask) &&
(this.getName().equals(that.getName()));
}
/**
* Deserialize this object based on its name and actions.
*/
private void readObject(ObjectInputStream in)
throws IOException, ClassNotFoundException {
in.defaultReadObject();
parseName();
parseActions();
}
}
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