| /* MBeanConstructorInfo.java -- Information about a bean's 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; |
| |
| import java.lang.reflect.Constructor; |
| |
| import java.util.Arrays; |
| |
| /** |
| * Describes the constructors of a management bean. |
| * The information in this class is immutable as standard. |
| * Of course, subclasses may change this, but this |
| * behaviour is not recommended. |
| * |
| * @author Andrew John Hughes (gnu_andrew@member.fsf.org) |
| * @since 1.5 |
| */ |
| public class MBeanConstructorInfo |
| extends MBeanFeatureInfo |
| implements Cloneable |
| { |
| |
| /** |
| * Compatible with JDK 1.5 |
| */ |
| private static final long serialVersionUID = 4433990064191844427L; |
| |
| /** |
| * The signature of the constructor i.e. the argument types. |
| */ |
| private MBeanParameterInfo[] signature; |
| |
| /** |
| * Constructs a @link{MBeanConstructorInfo} with the specified |
| * description using the given constructor. Each parameter is |
| * described merely by its type; the name and description are |
| * <code>null</code>. |
| * |
| * @param desc a description of the attribute. |
| * @param cons the constructor. |
| */ |
| public MBeanConstructorInfo(String desc, Constructor cons) |
| { |
| super(cons.getName(), desc); |
| Class[] paramTypes = cons.getParameterTypes(); |
| signature = new MBeanParameterInfo[paramTypes.length]; |
| for (int a = 0; a < paramTypes.length; ++a) |
| signature[a] = new MBeanParameterInfo(null, |
| paramTypes[a].getName(), |
| null); |
| } |
| |
| /** |
| * Constructs a @link{MBeanConstructorInfo} 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. |
| * |
| * @param name the name of the constructor. |
| * @param desc a description of the attribute. |
| * @param sig the signature of the constructor, as a series |
| * of {@link MBeanParameterInfo} objects, one for |
| * each parameter. |
| */ |
| public MBeanConstructorInfo(String name, String desc, |
| MBeanParameterInfo[] sig) |
| { |
| super(name, desc); |
| if (sig == null) |
| signature = new MBeanParameterInfo[0]; |
| else |
| signature = sig; |
| } |
| |
| /** |
| * Returns a clone of this instance. The clone is created |
| * using just the method provided by {@link java.lang.Object}. |
| * Thus, the clone is just a shallow clone as returned by |
| * that method, and does not contain any deeper cloning based |
| * on the subject of this class. |
| * |
| * @return a clone of this instance. |
| * @see java.lang.Cloneable |
| */ |
| public Object clone() |
| { |
| try |
| { |
| return super.clone(); |
| } |
| catch (CloneNotSupportedException e) |
| { |
| /* This shouldn't happen; we implement Cloneable */ |
| throw new IllegalStateException("clone() called on " + |
| "non-cloneable object."); |
| } |
| } |
| |
| /** |
| * Compares this feature with the supplied object. This returns |
| * true iff the object is an instance of {@link |
| * MBeanConstructorInfo}, {@link Object#equals()} returns true for a |
| * comparison of both the name and description of this notification |
| * with that of the specified object (performed by the superclass), |
| * and the two signature arrays contain the same elements in the |
| * same order (but one may be longer than the other). |
| * |
| * @param obj the object to compare. |
| * @return true if the object is a {@link MBeanConstructorInfo} |
| * instance, |
| * <code>name.equals(object.getName())</code>, |
| * <code>description.equals(object.getDescription())</code> |
| * and the corresponding elements of the signature arrays are |
| * equal. |
| */ |
| public boolean equals(Object obj) |
| { |
| if (!(obj instanceof MBeanConstructorInfo)) |
| return false; |
| if (!(super.equals(obj))) |
| return false; |
| MBeanConstructorInfo o = (MBeanConstructorInfo) obj; |
| MBeanParameterInfo[] sig = o.getSignature(); |
| for (int a = 0; a < signature.length; ++a) |
| { |
| if (a == sig.length) |
| return true; |
| if (!(signature[a].equals(sig[a]))) |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Returns the constructor's signature, in the form of |
| * information on each parameter. Each parameter is |
| * described by an instance of {@link MBeanParameterInfo}. |
| * The returned array is a shallow copy of the array used |
| * by this instance, so changing which elements are stored |
| * in the array won't affect the array used by this, but |
| * changing the actual elements will affect the ones used |
| * here. |
| * |
| * @return an array of {@link MBeanParameterInfo} objects, |
| * describing the constructor parameters. |
| */ |
| public MBeanParameterInfo[] getSignature() |
| { |
| return (MBeanParameterInfo[]) signature.clone(); |
| } |
| |
| /** |
| * Returns the hashcode of the constructor information as the sum |
| * of the hashcode of the superclass and the hashcode of the parameter |
| * array. |
| * |
| * @return the hashcode of the constructor information. |
| */ |
| public int hashCode() |
| { |
| return super.hashCode() + Arrays.hashCode(signature); |
| } |
| |
| /** |
| * <p> |
| * Returns a textual representation of this instance. This |
| * is constructed using the class name |
| * (<code>javax.management.MBeanConstructorInfo</code>), |
| * the name and description of the constructor and the |
| * contents of the array of parameters. |
| * </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) |
| { |
| super.toString(); |
| string = string.substring(0, string.length() - 1) |
| + ",signature=" + Arrays.toString(signature) |
| + "]"; |
| } |
| return string; |
| } |
| |
| } |