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Diffstat (limited to 'libjava/classpath/javax/management/openmbean/OpenMBeanConstructorInfoSupport.java')
| -rw-r--r-- | libjava/classpath/javax/management/openmbean/OpenMBeanConstructorInfoSupport.java | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/libjava/classpath/javax/management/openmbean/OpenMBeanConstructorInfoSupport.java b/libjava/classpath/javax/management/openmbean/OpenMBeanConstructorInfoSupport.java new file mode 100644 index 000000000..c187d5d13 --- /dev/null +++ b/libjava/classpath/javax/management/openmbean/OpenMBeanConstructorInfoSupport.java @@ -0,0 +1,174 @@ +/* OpenMBeanConstructorInfoSupport.java -- Open typed info about an constructor. + 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 javax.management.MBeanConstructorInfo; +import javax.management.MBeanParameterInfo; + +/** + * Describes a constructor for an open management bean. + * + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public class OpenMBeanConstructorInfoSupport + extends MBeanConstructorInfo + implements OpenMBeanConstructorInfo +{ + + /** + * Compatible with JDK 1.5 + */ + private static final long serialVersionUID = -4400441579007477003L; + + /** + * The hash code of this instance. + */ + private transient Integer hashCode; + + /** + * The <code>toString()</code> result of this instance. + */ + private transient String string; + + /** + * Constructs a @link{OpenMBeanConstructorInfo} with the specified + * name, description and parameter information. A <code>null</code> + * value for the parameter information is the same as passing in + * an empty array. Neither the name nor the description may be + * null or equal to the empty string. A copy of the parameter array + * is taken, so later changes have no effect. + * + * @param name the name of the constructor. + * @param desc a description of the constructor. + * @param sig the signature of the constructor, as a series + * of {@link MBeanParameterInfo} objects, one for + * each parameter. + * @throws IllegalArgumentException if the name or description is + * either <code>null</code> + * or the empty string. + * @throws ArrayStoreException if the members of the signature array + * are not assignable to + * {@link javax.management.MBeanParameterInfo} + */ + public OpenMBeanConstructorInfoSupport(String name, String desc, + OpenMBeanParameterInfo[] sig) + { + super(name, desc, (MBeanParameterInfo[]) sig); + if (name == null) + throw new IllegalArgumentException("The name may not be null."); + if (desc == null) + throw new IllegalArgumentException("The description may not be null."); + if (name.length() == 0) + throw new IllegalArgumentException("The name may not be the empty string."); + if (desc.length() == 0) + throw new IllegalArgumentException("The description may not be the " + + "empty string."); + } + + /** + * Compares this attribute with the supplied object. This returns + * true iff the object is an instance of {@link OpenMBeanConstructorInfo} + * with an equal name and signature. + * + * @param obj the object to compare. + * @return true if the object is a {@link OpenMBeanParameterInfo} + * instance, + * <code>name.equals(object.getName())</code>, + * and <code>signature.equals(object.getSignature())</code>. + */ + public boolean equals(Object obj) + { + if (!(obj instanceof OpenMBeanConstructorInfo)) + return false; + OpenMBeanConstructorInfo o = (OpenMBeanConstructorInfo) obj; + return getName().equals(o.getName()) && + getSignature().equals(o.getSignature()); + } + + /** + * <p> + * Returns the hashcode of the constructor information as the sum of + * the hashcodes of the name and signature (calculated by + * <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 constructor information. + */ + public int hashCode() + { + if (hashCode == null) + hashCode = Integer.valueOf(getName().hashCode() + + Arrays.asList(getSignature()).hashCode()); + return hashCode.intValue(); + } + + /** + * <p> + * Returns a textual representation of this instance. This + * is constructed using the class name + * (<code>javax.management.openmbean.OpenMBeanConstructorInfo</code>) + * along with the name and signature. + * </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() + + "[name=" + getName() + + ",signature=" + Arrays.toString(getSignature()) + + "]"; + return string; + } + +} |