Showing the changes to java/pkg/javax/management/InstanceOfQueryExp.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package javax.management; | ||
| 27 | |||
| 28 | |||
| 29 | /** | ||
| 30 | * This class is used by the query building mechanism for isInstanceOf expressions. | ||
| 31 | * @serial include | ||
| 32 | * | ||
| 33 | * @since 1.6 | ||
| 34 | */ | ||
| 35 | class InstanceOfQueryExp extends QueryEval implements QueryExp { | ||
| 36 | |||
| 37 | /* Serial version */ | ||
| 38 | private static final long serialVersionUID = -1081892073854801359L; | ||
| 39 | |||
| 40 | /** | ||
| 41 | * @serial The {@link StringValueExp} returning the name of the class | ||
| 42 | * of which selected MBeans should be instances. | ||
| 43 | */ | ||
| 44 | private StringValueExp classNameValue; | ||
| 45 | |||
| 46 | /** | ||
| 47 | * Creates a new InstanceOfExp with a specific class name. | ||
| 48 | * @param classNameValue The {@link StringValueExp} returning the name of | ||
| 49 | * the class of which selected MBeans should be instances. | ||
| 50 | */ | ||
| 51 | // We are using StringValueExp here to be consistent with other queries, | ||
| 52 | // although we should actually either use a simple string (the classname) | ||
| 53 | // or a ValueExp - which would allow more complex queries - like for | ||
| 54 | // instance evaluating the class name from an AttributeValueExp. | ||
| 55 | // As it stands - using StringValueExp instead of a simple constant string | ||
| 56 | // doesn't serve any useful purpose besides offering a consistent | ||
| 57 | // look & feel. | ||
| 58 | public InstanceOfQueryExp(StringValueExp classNameValue) { | ||
| 59 | if (classNameValue == null) { | ||
| 60 | throw new IllegalArgumentException("Null class name."); | ||
| 61 | } | ||
| 62 | |||
| 63 | this.classNameValue = classNameValue; | ||
| 64 | } | ||
| 65 | |||
| 66 | /** | ||
| 67 | * Returns the class name. | ||
| 68 | * @returns The {@link StringValueExp} returning the name of | ||
| 69 | * the class of which selected MBeans should be instances. | ||
| 70 | */ | ||
| 71 | public StringValueExp getClassNameValue() { | ||
| 72 | return classNameValue; | ||
| 73 | } | ||
| 74 | |||
| 75 | /** | ||
| 76 | * Applies the InstanceOf on a MBean. | ||
| 77 | * | ||
| 78 | * @param name The name of the MBean on which the InstanceOf will be applied. | ||
| 79 | * | ||
| 80 | * @return True if the MBean specified by the name is instance of the class. | ||
| 81 | * @exception BadAttributeValueExpException | ||
| 82 | * @exception InvalidApplicationException | ||
| 83 | * @exception BadStringOperationException | ||
| 84 | * @exception BadBinaryOpValueExpException | ||
| 85 | */ | ||
| 86 | public boolean apply(ObjectName name) | ||
| 87 | throws BadStringOperationException, | ||
| 88 | BadBinaryOpValueExpException, | ||
| 89 | BadAttributeValueExpException, | ||
| 90 | InvalidApplicationException { | ||
| 91 | |||
| 92 | // Get the class name value | ||
| 93 | final StringValueExp val; | ||
| 94 | try { | ||
| 95 | val = (StringValueExp) classNameValue.apply(name); | ||
| 96 | } catch (ClassCastException x) { | ||
| 97 | // Should not happen - unless someone wrongly implemented | ||
| 98 | // StringValueExp.apply(). | ||
| 99 | final BadStringOperationException y = | ||
| 100 | new BadStringOperationException(x.toString()); | ||
| 101 | y.initCause(x); | ||
| 102 | throw y; | ||
| 103 | } | ||
| 104 | |||
| 105 | // Test whether the MBean is an instance of that class. | ||
| 106 | try { | ||
| 107 | return getMBeanServer().isInstanceOf(name, val.getValue()); | ||
| 108 | } catch (InstanceNotFoundException infe) { | ||
| 109 | return false; | ||
| 110 | } | ||
| 111 | } | ||
| 112 | |||
| 113 | /** | ||
| 114 | * Returns a string representation of this InstanceOfQueryExp. | ||
| 115 | * @return a string representation of this InstanceOfQueryExp. | ||
| 116 | */ | ||
| 117 | public String toString() { | ||
| 118 | return "InstanceOf " + classNameValue.toString(); | ||
| 119 | } | ||
| 120 | } | ||