| /* ClassHelper.java -- Utility methods to augment java.lang.Class |
| Copyright (C) 1998, 2002 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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 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 gnu.java.lang; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * ClassHelper has various methods that ought to have been in Class. |
| * |
| * @author John Keiser |
| * @author Eric Blake <ebb9@email.byu.edu> |
| */ |
| public class ClassHelper |
| { |
| /** |
| * Strip the package part from the class name. |
| * |
| * @param clazz the class to get the truncated name from |
| * @return the truncated class name |
| */ |
| public static String getTruncatedClassName(Class clazz) |
| { |
| return getTruncatedName(clazz.getName()); |
| } |
| |
| /** |
| * Strip the package part from the class name, or the class part from |
| * the method or field name. |
| * |
| * @param name the name to truncate |
| * @return the truncated name |
| */ |
| public static String getTruncatedName(String name) |
| { |
| int lastInd = name.lastIndexOf('.'); |
| if (lastInd == -1) |
| return name; |
| return name.substring(lastInd + 1); |
| } |
| |
| /** Cache of methods found in getAllMethods(). */ |
| private static Map allMethods = new HashMap(); |
| |
| /** |
| * Get all the methods, public, private and otherwise, from the class, |
| * getting them from the most recent class to find them. This may not |
| * be quite the correct approach, as this includes methods that are not |
| * inherited or accessible from clazz, so beware. |
| * |
| * @param clazz the class to start at |
| * @return all methods declared or inherited in clazz |
| */ |
| public static Method[] getAllMethods(Class clazz) |
| { |
| Method[] retval = (Method[]) allMethods.get(clazz); |
| if (retval == null) |
| { |
| Set methods = new HashSet(); |
| Class c = clazz; |
| while (c != null) |
| { |
| Method[] currentMethods = c.getDeclaredMethods(); |
| loop: |
| for (int i = 0; i < currentMethods.length; i++) |
| { |
| Method current = currentMethods[i]; |
| int size = methods.size(); |
| Iterator iter = methods.iterator(); |
| while (--size >= 0) |
| { |
| Method override = (Method) iter.next(); |
| if (current.getName().equals(override.getName()) |
| && Arrays.equals(current.getParameterTypes(), |
| override.getParameterTypes()) |
| && current.getReturnType() == override.getReturnType()) |
| continue loop; |
| } |
| methods.add(current); |
| } |
| c = c.getSuperclass(); |
| } |
| retval = new Method[methods.size()]; |
| methods.toArray(retval); |
| allMethods.put(clazz, retval); |
| } |
| return retval; |
| } |
| |
| /** Cache of fields found in getAllFields(). */ |
| private static Map allFields = new HashMap(); |
| |
| /** |
| * Get all the fields, public, private and otherwise, from the class, |
| * getting them from the most recent class to find them. This may not |
| * be quite the correct approach, as this includes fields that are not |
| * inherited or accessible from clazz, so beware. |
| * |
| * @param clazz the class to start at |
| * @return all fields declared or inherited in clazz |
| */ |
| public static Field[] getAllFields(Class clazz) |
| { |
| Field[] retval = (Field[]) allFields.get(clazz); |
| if (retval == null) |
| { |
| Set fields = new HashSet(); |
| Class c = clazz; |
| while (c != null) |
| { |
| Field[] currentFields = c.getDeclaredFields(); |
| loop: |
| for (int i = 0; i < currentFields.length; i++) |
| { |
| Field current = currentFields[i]; |
| int size = fields.size(); |
| Iterator iter = fields.iterator(); |
| while (--size >= 0) |
| { |
| Field override = (Field) iter.next(); |
| if (current.getName().equals(override.getName()) |
| && current.getType() == override.getType()) |
| continue loop; |
| } |
| fields.add(current); |
| } |
| c = c.getSuperclass(); |
| } |
| retval = new Field[fields.size()]; |
| fields.toArray(retval); |
| allFields.put(clazz, retval); |
| } |
| return retval; |
| } |
| } |