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 | +} | |