0N/A/*
2362N/A * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/Apackage javax.management;
0N/A
0N/A
0N/A/**
0N/A * This class is used by the query building mechanism for isInstanceOf expressions.
0N/A * @serial include
0N/A *
0N/A * @since 1.6
0N/A */
0N/Aclass InstanceOfQueryExp extends QueryEval implements QueryExp {
0N/A
0N/A /* Serial version */
0N/A private static final long serialVersionUID = -1081892073854801359L;
0N/A
0N/A /**
0N/A * @serial The {@link StringValueExp} returning the name of the class
0N/A * of which selected MBeans should be instances.
0N/A */
0N/A private StringValueExp classNameValue;
0N/A
0N/A /**
0N/A * Creates a new InstanceOfExp with a specific class name.
0N/A * @param classNameValue The {@link StringValueExp} returning the name of
0N/A * the class of which selected MBeans should be instances.
0N/A */
0N/A // We are using StringValueExp here to be consistent with other queries,
0N/A // although we should actually either use a simple string (the classname)
0N/A // or a ValueExp - which would allow more complex queries - like for
0N/A // instance evaluating the class name from an AttributeValueExp.
0N/A // As it stands - using StringValueExp instead of a simple constant string
0N/A // doesn't serve any useful purpose besides offering a consistent
0N/A // look & feel.
0N/A public InstanceOfQueryExp(StringValueExp classNameValue) {
0N/A if (classNameValue == null) {
0N/A throw new IllegalArgumentException("Null class name.");
0N/A }
0N/A
0N/A this.classNameValue = classNameValue;
0N/A }
0N/A
0N/A /**
0N/A * Returns the class name.
0N/A * @returns The {@link StringValueExp} returning the name of
0N/A * the class of which selected MBeans should be instances.
0N/A */
0N/A public StringValueExp getClassNameValue() {
0N/A return classNameValue;
0N/A }
0N/A
0N/A /**
0N/A * Applies the InstanceOf on a MBean.
0N/A *
0N/A * @param name The name of the MBean on which the InstanceOf will be applied.
0N/A *
0N/A * @return True if the MBean specified by the name is instance of the class.
0N/A * @exception BadAttributeValueExpException
0N/A * @exception InvalidApplicationException
0N/A * @exception BadStringOperationException
0N/A * @exception BadBinaryOpValueExpException
0N/A */
0N/A public boolean apply(ObjectName name)
0N/A throws BadStringOperationException,
0N/A BadBinaryOpValueExpException,
0N/A BadAttributeValueExpException,
0N/A InvalidApplicationException {
0N/A
0N/A // Get the class name value
0N/A final StringValueExp val;
0N/A try {
0N/A val = (StringValueExp) classNameValue.apply(name);
0N/A } catch (ClassCastException x) {
0N/A // Should not happen - unless someone wrongly implemented
0N/A // StringValueExp.apply().
0N/A final BadStringOperationException y =
0N/A new BadStringOperationException(x.toString());
0N/A y.initCause(x);
0N/A throw y;
0N/A }
0N/A
0N/A // Test whether the MBean is an instance of that class.
0N/A try {
0N/A return getMBeanServer().isInstanceOf(name, val.getValue());
0N/A } catch (InstanceNotFoundException infe) {
0N/A return false;
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Returns a string representation of this InstanceOfQueryExp.
0N/A * @return a string representation of this InstanceOfQueryExp.
0N/A */
0N/A public String toString() {
0N/A return "InstanceOf " + classNameValue.toString();
0N/A }
0N/A}