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Diffstat (limited to 'javax/management/openmbean/OpenMBeanInfoSupport.java')
| -rw-r--r-- | javax/management/openmbean/OpenMBeanInfoSupport.java | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/javax/management/openmbean/OpenMBeanInfoSupport.java b/javax/management/openmbean/OpenMBeanInfoSupport.java new file mode 100644 index 000000000..5f8d55b83 --- /dev/null +++ b/javax/management/openmbean/OpenMBeanInfoSupport.java @@ -0,0 +1,191 @@ +/* OpenMBeanInfoSupport.java -- Open typed info about a bean. + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package javax.management.openmbean; + +import java.util.Arrays; +import java.util.HashSet; + +import javax.management.MBeanInfo; +import javax.management.MBeanAttributeInfo; +import javax.management.MBeanConstructorInfo; +import javax.management.MBeanNotificationInfo; +import javax.management.MBeanOperationInfo; + +/** + * Describes an open management bean. + * + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public class OpenMBeanInfoSupport + extends MBeanInfo + implements OpenMBeanInfo +{ + + /** + * Compatible with JDK 1.5 + */ + private static final long serialVersionUID = 4349395935420511492L; + + /** + * The hash code of this instance. + */ + private transient Integer hashCode; + + /** + * The <code>toString()</code> result of this instance. + */ + private transient String string; + + /** + * Constructs a new {@link OpenMBeanInfo} using the supplied + * class name and description with the given attributes, + * operations, constructors and notifications. The class + * name does not have to actually specify a valid class that + * can be loaded by the MBean server or class loader; it merely + * has to be a syntactically correct class name. Any of the + * arrays may be <code>null</code>; this will be treated as if + * an empty array was supplied. A copy of the arrays is + * taken, so later changes have no effect. + * + * @param name the name of the class this instance describes. + * @param desc a description of the bean. + * @param attribs the attribute descriptions for the bean, + * or <code>null</code>. + * @param cons the constructor descriptions for the bean, + * or <code>null</code>. + * @param ops the operation descriptions for the bean, + * or <code>null</code>. + * @param notifs the notification descriptions for the bean, + * or <code>null</code>. + * @throws ArrayStoreException if a members of an array + * is not assignable to the equivalent + * <code>MBeanXXXInfo</code> class. + */ + public OpenMBeanInfoSupport(String name, String desc, + OpenMBeanAttributeInfo[] attribs, + OpenMBeanConstructorInfo[] cons, + OpenMBeanOperationInfo[] ops, + MBeanNotificationInfo[] notifs) + { + super(name, desc, (MBeanAttributeInfo[]) attribs, + (MBeanConstructorInfo[]) cons, + (MBeanOperationInfo[]) ops, + notifs); + } + + /** + * Compares this attribute with the supplied object. This returns + * true iff the object is an instance of {@link OpenMBeanInfo} + * with the same class name and equal instances of the info classes. + * + * @param obj the object to compare. + * @return true if the object is a {@link OpenMBeanInfo} + * instance, + * <code>className.equals(object.getClassName())</code> + * and each info class has an equal in the other object. + */ + public boolean equals(Object obj) + { + if (!(obj instanceof OpenMBeanInfo)) + return false; + OpenMBeanInfo o = (OpenMBeanInfo) obj; + return getClassName().equals(o.getClassName()) && + getAttributes().equals(o.getAttributes()) && + getConstructors().equals(o.getConstructors()) && + getNotifications().equals(o.getNotifications()) && + getOperations().equals(o.getOperations()); + } + + /** + * <p> + * Returns the hashcode of the bean information as the sum of the + * hashcodes of the class name and each array (calculated using + * java.util.HashSet(<code>java.util.Arrays.asList(signature)).hashCode()</code>). + * </p> + * <p> + * As instances of this class are immutable, the return value + * is computed just once for each instance and reused + * throughout its life. + * </p> + * + * @return the hashcode of the bean information. + */ + public int hashCode() + { + if (hashCode == null) + hashCode = + Integer.valueOf(getClassName().hashCode() + + new HashSet(Arrays.asList(getAttributes())).hashCode() + + new HashSet(Arrays.asList(getConstructors())).hashCode() + + new HashSet(Arrays.asList(getNotifications())).hashCode() + + new HashSet(Arrays.asList(getOperations())).hashCode()); + return hashCode.intValue(); + } + + /** + * <p> + * Returns a textual representation of this instance. This + * is constructed using the class name + * (<code>javax.management.openmbean.OpenMBeanInfo</code>) + * along with the class name and textual representations + * of each array. + * </p> + * <p> + * As instances of this class are immutable, the return value + * is computed just once for each instance and reused + * throughout its life. + * </p> + * + * @return a @link{java.lang.String} instance representing + * the instance in textual form. + */ + public String toString() + { + if (string == null) + string = getClass().getName() + + "[className=" + getClassName() + + ",attributes=" + Arrays.toString(getAttributes()) + + ",constructors=" + Arrays.toString(getConstructors()) + + ",notifications=" + Arrays.toString(getNotifications()) + + ",operations=" + Arrays.toString(getOperations()) + + "]"; + return string; + } + +} |