/* * Copyright (c) 2005, 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;/** * This class is used by the query building mechanism for isInstanceOf expressions. * @serial include * * @since 1.6 */class InstanceOfQueryExp extends QueryEval implements QueryExp { /* Serial version */ private static final long serialVersionUID = -1081892073854801359L; /** * @serial The {@link StringValueExp} returning the name of the class * of which selected MBeans should be instances. */ private StringValueExp classNameValue; /** * Creates a new InstanceOfExp with a specific class name. * @param classNameValue The {@link StringValueExp} returning the name of * the class of which selected MBeans should be instances. */ // We are using StringValueExp here to be consistent with other queries, // although we should actually either use a simple string (the classname) // or a ValueExp - which would allow more complex queries - like for // instance evaluating the class name from an AttributeValueExp. // As it stands - using StringValueExp instead of a simple constant string // doesn't serve any useful purpose besides offering a consistent // look & feel. public InstanceOfQueryExp(StringValueExp classNameValue) { if (classNameValue == null) { throw new IllegalArgumentException("Null class name."); } this.classNameValue = classNameValue; } /** * Returns the class name. * @returns The {@link StringValueExp} returning the name of * the class of which selected MBeans should be instances. */ public StringValueExp getClassNameValue() { return classNameValue; } /** * Applies the InstanceOf on a MBean. * * @param name The name of the MBean on which the InstanceOf will be applied. * * @return True if the MBean specified by the name is instance of the class. * @exception BadAttributeValueExpException * @exception InvalidApplicationException * @exception BadStringOperationException * @exception BadBinaryOpValueExpException */ public boolean apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException, BadAttributeValueExpException, InvalidApplicationException { // Get the class name value final StringValueExp val; try { val = (StringValueExp) classNameValue.apply(name); } catch (ClassCastException x) { // Should not happen - unless someone wrongly implemented // StringValueExp.apply(). final BadStringOperationException y = new BadStringOperationException(x.toString()); y.initCause(x); throw y; } // Test whether the MBean is an instance of that class. try { return getMBeanServer().isInstanceOf(name, val.getValue()); } catch (InstanceNotFoundException infe) { return false; } } /** * Returns a string representation of this InstanceOfQueryExp. * @return a string representation of this InstanceOfQueryExp. */ public String toString() { return "InstanceOf " + classNameValue.toString(); }}
/*
* Copyright (c) 2005, 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;
/**
* This class is used by the query building mechanism for isInstanceOf expressions.
* @serial include
*
* @since 1.6
*/
class InstanceOfQueryExp extends QueryEval implements QueryExp {
/* Serial version */
private static final long serialVersionUID = -1081892073854801359L;
/**
* @serial The {@link StringValueExp} returning the name of the class
* of which selected MBeans should be instances.
*/
private StringValueExp classNameValue;
/**
* Creates a new InstanceOfExp with a specific class name.
* @param classNameValue The {@link StringValueExp} returning the name of
* the class of which selected MBeans should be instances.
*/
// We are using StringValueExp here to be consistent with other queries,
// although we should actually either use a simple string (the classname)
// or a ValueExp - which would allow more complex queries - like for
// instance evaluating the class name from an AttributeValueExp.
// As it stands - using StringValueExp instead of a simple constant string
// doesn't serve any useful purpose besides offering a consistent
// look & feel.
public InstanceOfQueryExp(StringValueExp classNameValue) {
if (classNameValue == null) {
throw new IllegalArgumentException("Null class name.");
}
this.classNameValue = classNameValue;
}
/**
* Returns the class name.
* @returns The {@link StringValueExp} returning the name of
* the class of which selected MBeans should be instances.
*/
public StringValueExp getClassNameValue() {
return classNameValue;
}
/**
* Applies the InstanceOf on a MBean.
*
* @param name The name of the MBean on which the InstanceOf will be applied.
*
* @return True if the MBean specified by the name is instance of the class.
* @exception BadAttributeValueExpException
* @exception InvalidApplicationException
* @exception BadStringOperationException
* @exception BadBinaryOpValueExpException
*/
public boolean apply(ObjectName name)
throws BadStringOperationException,
BadBinaryOpValueExpException,
BadAttributeValueExpException,
InvalidApplicationException {
// Get the class name value
final StringValueExp val;
try {
val = (StringValueExp) classNameValue.apply(name);
} catch (ClassCastException x) {
// Should not happen - unless someone wrongly implemented
// StringValueExp.apply().
final BadStringOperationException y =
new BadStringOperationException(x.toString());
y.initCause(x);
throw y;
}
// Test whether the MBean is an instance of that class.
try {
return getMBeanServer().isInstanceOf(name, val.getValue());
} catch (InstanceNotFoundException infe) {
return false;
}
}
/**
* Returns a string representation of this InstanceOfQueryExp.
* @return a string representation of this InstanceOfQueryExp.
*/
public String toString() {
return "InstanceOf " + classNameValue.toString();
}
}