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244 lines
7.5 KiB
Java
244 lines
7.5 KiB
Java
/* gnu.java.lang.ClassHelper
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Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.lang;
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import java.util.*;
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import java.lang.reflect.*;
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/**
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** ClassHelper has various methods that ought to have been
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** in class.
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**
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** @author John Keiser
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** @version 1.1.0, 29 Jul 1998
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**/
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public class ClassHelper {
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/** Strip the package part from the class name.
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** @param clazz the class to get the truncated name from
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** @return the truncated class name.
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**/
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public static String getTruncatedClassName(Class clazz) {
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return getTruncatedName(clazz.getName());
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}
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/** Strip the package part from the class name, or the
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** class part from the method or field name.
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** @param name the name to truncate.
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** @return the truncated name.
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**/
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public static String getTruncatedName(String name) {
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int lastInd = name.lastIndexOf('.');
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if(lastInd == -1) {
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return name;
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} else {
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return name.substring(lastInd+1);
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}
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}
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/** Strip the last portion of the name (after the last
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** dot).
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** @param name the name to get package of.
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** @return the package name. "" if no package.
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**/
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public static String getPackagePortion(String name) {
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int lastInd = name.lastIndexOf('.');
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if(lastInd == -1) {
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return "";
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} else {
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return name.substring(0,lastInd);
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}
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}
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static Hashtable allMethods = new Hashtable();
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static Hashtable allMethodsAtDeclaration = new Hashtable();
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/** Get all the methods, public, private and
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** otherwise, from the class, getting them
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** from the most recent class to find them.
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**/
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public static Method[] getAllMethods(Class clazz) {
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Method[] retval = (Method[])allMethods.get(clazz);
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if(retval == null) {
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Method[] superMethods;
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if(clazz.getSuperclass() != null) {
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superMethods = getAllMethods(clazz.getSuperclass());
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} else {
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superMethods = new Method[0];
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}
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Vector v = new Vector();
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Method[] currentMethods = clazz.getDeclaredMethods();
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for(int i=0;i<currentMethods.length;i++) {
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v.addElement(currentMethods[i]);
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}
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for(int i=0;i<superMethods.length;i++) {
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boolean addOK = true;
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for(int j=0;j<currentMethods.length;j++) {
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if(getTruncatedName(superMethods[i].getName()).equals(getTruncatedName(currentMethods[j].getName()))
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&& ArrayHelper.equalsArray(superMethods[i].getParameterTypes(),currentMethods[j].getParameterTypes())) {
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addOK = false;
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}
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}
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if(addOK) {
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v.addElement(superMethods[i]);
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}
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}
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retval = new Method[v.size()];
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v.copyInto(retval);
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allMethods.put(clazz,retval);
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}
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return retval;
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}
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/** Get all the methods, public, private and
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** otherwise, from the class, and get them from
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** their point of declaration.
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**/
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public static Method[] getAllMethodsAtDeclaration(Class clazz) {
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Method[] retval = (Method[])allMethodsAtDeclaration.get(clazz);
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if(retval == null) {
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Method[] superMethods;
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if(clazz.getSuperclass() != null) {
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superMethods = getAllMethodsAtDeclaration(clazz.getSuperclass());
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} else {
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superMethods = new Method[0];
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}
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Vector v = new Vector();
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Method[] currentMethods = clazz.getDeclaredMethods();
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for(int i=0;i<superMethods.length;i++) {
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v.addElement(superMethods[i]);
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}
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for(int i=0;i<superMethods.length;i++) {
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boolean addOK = true;
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for(int j=0;j<currentMethods.length;j++) {
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if(getTruncatedName(superMethods[i].getName()).equals(getTruncatedName(currentMethods[j].getName()))
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&& ArrayHelper.equalsArray(superMethods[i].getParameterTypes(),currentMethods[j].getParameterTypes())) {
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addOK = false;
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}
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}
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if(addOK) {
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v.addElement(superMethods[i]);
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}
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}
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retval = new Method[v.size()];
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v.copyInto(retval);
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allMethodsAtDeclaration.put(clazz,retval);
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}
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return retval;
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}
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static Hashtable allFields = new Hashtable();
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static Hashtable allFieldsAtDeclaration = new Hashtable();
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/** Get all the fields, public, private and
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** otherwise, from the class, getting them
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** from the most recent class to find them.
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**/
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public static Field[] getAllFields(Class clazz) {
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Field[] retval = (Field[])allFields.get(clazz);
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if(retval == null) {
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Field[] superFields;
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if(clazz.getSuperclass() != null) {
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superFields = getAllFields(clazz.getSuperclass());
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} else {
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superFields = new Field[0];
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}
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Vector v = new Vector();
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Field[] currentFields = clazz.getDeclaredFields();
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for(int i=0;i<currentFields.length;i++) {
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v.addElement(currentFields[i]);
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}
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for(int i=0;i<superFields.length;i++) {
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boolean addOK = true;
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for(int j=0;j<currentFields.length;j++) {
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if(getTruncatedName(superFields[i].getName()).equals(getTruncatedName(currentFields[j].getName()))) {
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addOK = false;
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}
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}
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if(addOK) {
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v.addElement(superFields[i]);
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}
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}
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retval = new Field[v.size()];
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v.copyInto(retval);
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allFields.put(clazz,retval);
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}
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return retval;
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}
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/** Get all the fields, public, private and
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** otherwise, from the class, and get them from
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** their point of declaration.
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**/
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public static Field[] getAllFieldsAtDeclaration(Class clazz) {
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Field[] retval = (Field[])allFieldsAtDeclaration.get(clazz);
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if(retval == null) {
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Field[] superFields;
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if(clazz.getSuperclass() != null) {
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superFields = getAllFieldsAtDeclaration(clazz.getSuperclass());
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} else {
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superFields = new Field[0];
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}
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Vector v = new Vector();
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Field[] currentFields = clazz.getDeclaredFields();
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for(int i=0;i<superFields.length;i++) {
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v.addElement(superFields[i]);
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}
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for(int i=0;i<superFields.length;i++) {
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boolean addOK = true;
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for(int j=0;j<currentFields.length;j++) {
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if(getTruncatedName(superFields[i].getName()).equals(getTruncatedName(currentFields[j].getName()))) {
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addOK = false;
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}
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}
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if(addOK) {
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v.addElement(superFields[i]);
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}
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}
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retval = new Field[v.size()];
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v.copyInto(retval);
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allFieldsAtDeclaration.put(clazz,retval);
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}
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return retval;
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}
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}
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