001 /* OpenMBeanAttributeInfo.java -- Open typed info about an attribute. 002 Copyright (C) 2006 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 package javax.management.openmbean; 039 040 /** 041 * Describes an attribute associated with an open management bean. 042 * This interface includes those methods specified by {@link 043 * javax.management.MBeanAttributeInfo}, so implementations should 044 * extend this class. 045 * 046 * @author Andrew John Hughes (gnu_andrew@member.fsf.org) 047 * @since 1.5 048 */ 049 public interface OpenMBeanAttributeInfo 050 extends OpenMBeanParameterInfo 051 { 052 053 /** 054 * Compares this attribute with the supplied object. This returns 055 * true iff the object is an instance of {@link OpenMBeanAttributeInfo} 056 * with an equal name and open type, the same default, minimum, 057 * maximum and legal values and the same access properties 058 * ({@link #isIs()}, {@link #isReadable()}, {@link #isWritable()}). 059 * 060 * @param obj the object to compare. 061 * @return true if the object is a {@link OpenMBeanParameterInfo} 062 * instance, 063 * <code>name.equals(object.getName())</code>, 064 * <code>openType.equals(object.getOpenType())</code>, 065 * <code>defaultValue.equals(object.getDefaultValue())</code>, 066 * <code>minValue.equals(object.getMinValue())</code>, 067 * <code>maxValue.equals(object.getMaxValue())</code>, 068 * <code>legalValues.equals(object.getLegalValues())</code>, 069 * <code>is == object.isIs()</code>, 070 * <code>isRead == object.isReadable()</code>, 071 * and <code>isWrite == object.isWritable()</code>. 072 */ 073 boolean equals(Object obj); 074 075 /** 076 * Returns the hashcode of the attribute information as the sum of 077 * the hashcodes of the name, open type, default value, maximum 078 * value, minimum value, the set of legal values and the access 079 * properties. 080 * 081 * @return the hashcode of the attribute information. 082 */ 083 int hashCode(); 084 085 /** 086 * Returns true if the accessor method of this attribute 087 * is of the form <code>isXXX</code>. 088 * 089 * @return true if the accessor takes the form <code>isXXX</code>. 090 */ 091 boolean isIs(); 092 093 /** 094 * Returns true if value of this attribute can be read. 095 * 096 * @return true if the value of the attribute can be read. 097 */ 098 boolean isReadable(); 099 100 /** 101 * Returns true if the value of this attribute can be changed. 102 * 103 * @return true if the value of the attribute can be changed. 104 */ 105 boolean isWritable(); 106 107 /** 108 * Returns a textual representation of this instance. This 109 * is constructed using the class name 110 * (<code>javax.management.openmbean.OpenMBeanAttributeInfo</code>) 111 * along with the name, open type, default, minimum, maximum 112 * and legal values of the parameter and the access permissions 113 * ({@link #isIs()}, {@link #isReadable()}, {@link #isWritable()}). 114 * 115 * @return a @link{java.lang.String} instance representing 116 * the instance in textual form. 117 */ 118 String toString(); 119 120 }