123 lines
4.0 KiB
Java
123 lines
4.0 KiB
Java
/*
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* Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.management;
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/**
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* <p>Represents attributes used as arguments to relational constraints,
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* where the attribute must be in an MBean of a specified {@linkplain
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* MBeanInfo#getClassName() class}. A QualifiedAttributeValueExp may be used
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* anywhere a ValueExp is required.
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*
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* @serial include
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*
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* @since 1.5
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*/
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class QualifiedAttributeValueExp extends AttributeValueExp {
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/* Serial version */
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private static final long serialVersionUID = 8832517277410933254L;
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/**
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* @serial The attribute class name
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*/
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private String className;
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/**
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* Basic Constructor.
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* @deprecated see {@link AttributeValueExp#AttributeValueExp()}
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*/
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@Deprecated
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public QualifiedAttributeValueExp() {
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}
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/**
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* Creates a new QualifiedAttributeValueExp representing the specified object
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* attribute, named attr with class name className.
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*/
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public QualifiedAttributeValueExp(String className, String attr) {
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super(attr);
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this.className = className;
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}
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/**
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* Returns a string representation of the class name of the attribute.
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*/
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public String getAttrClassName() {
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return className;
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}
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/**
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* Applies the QualifiedAttributeValueExp to an MBean.
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*
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* @param name The name of the MBean on which the QualifiedAttributeValueExp will be applied.
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*
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* @return The ValueExp.
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*
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* @exception BadStringOperationException
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* @exception BadBinaryOpValueExpException
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* @exception BadAttributeValueExpException
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* @exception InvalidApplicationException
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*/
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@Override
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public ValueExp apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException,
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BadAttributeValueExpException, InvalidApplicationException {
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try {
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MBeanServer server = QueryEval.getMBeanServer();
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String v = server.getObjectInstance(name).getClassName();
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if (v.equals(className)) {
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return super.apply(name);
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}
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throw new InvalidApplicationException("Class name is " + v +
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", should be " + className);
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} catch (Exception e) {
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throw new InvalidApplicationException("Qualified attribute: " + e);
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/* Can happen if MBean disappears between the time we
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construct the list of MBeans to query and the time we
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evaluate the query on this MBean, or if
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getObjectInstance throws SecurityException. */
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}
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}
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/**
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* Returns the string representing its value
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*/
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@Override
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public String toString() {
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if (className != null) {
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return className + "." + super.toString();
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} else {
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return super.toString();
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}
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}
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}
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