+++ /dev/null
-/*
- * Copyright (c) 2003-2005 The BISON Project
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-package peersim.vector;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-/**
- * This utility class can be used to obtain get/set methods from classes. In
- * particular, it is used in the vector package to locate get/set methods for
- * observing and modifying protocol fields.
- * Please refer to package {@link peersim.vector} for a definition of
- * getter and setter methods.
- */
-class GetterSetterFinder
-{
-
-//--------------------------------------------------------------------------
-
-/**
- * Search a getter method in the specified class. It succeeds only of there
- * is exactly one method with the given name that is a getter method.
- * Please refer to package {@link peersim.vector} for a definition of
- * getter methods.
- *
- * @param clazz
- * the class where to find get/set method
- * @param methodName
- * the method to be searched
- * @return the requested method
- */
-public static Method getGetterMethod(Class clazz, String methodName)
- throws NoSuchMethodException
-{
- // Search methods
- Method[] methods = clazz.getMethods();
- ArrayList<Method> list = new ArrayList<Method>();
- for (Method m: methods) {
- if (m.getName().equals(methodName)) {
- list.add(m);
- }
- }
- if (list.size() == 0) {
- throw new NoSuchMethodException("No getter method for method "
- + methodName + " in class " + clazz.getName());
- } else if (list.size() > 1) {
- throw new NoSuchMethodException("Multiple getter for method "
- + methodName + " in class " + clazz.getName());
- }
-
- // Found a single method with the right name; check if
- // it is a gettter.
- Method method = list.get(0);
- Class[] pars = method.getParameterTypes();
- if (pars.length > 0) {
- throw new NoSuchMethodException(method.getName() + " of class "
- + clazz.getName()
- + " is not a valid getter method: "+
- "its argument list is not empty");
- }
-
- Class ret = method.getReturnType();
- if ( !( ret==int.class || ret==long.class ||
- ret==double.class || ret==float.class || ret==boolean.class)
- ) {
- throw new NoSuchMethodException(method.getName() + " of class "
- + clazz.getName() + " is not a valid getter method: "+
- "it should have a return type of int, long, short or double");
- }
-
- return method;
-}
-
-//--------------------------------------------------------------------------
-
-/**
- * Search a setter method in the specified class.
- * It succeeds only of there
- * is exactly one method with the given name that is a setter method.
- * Please refer to package {@link peersim.vector} for a definition of
- * setter methods.
- * @param clazz
- * the class where to find get/set method
- * @param methodName
- * the method to be searched
- * @return the requested method, if it fully conforms to the definition of
- * the setter methods.
- */
-public static Method getSetterMethod(Class clazz, String methodName)
- throws NoSuchMethodException
-{
- // Search methods
- Method[] methods = clazz.getMethods();
- ArrayList<Method> list = new ArrayList<Method>();
- for (Method m: methods) {
- if (m.getName().equals(methodName)) {
- list.add(m);
- }
- }
-
- if (list.size() == 0) {
- throw new NoSuchMethodException("No setter method for method "
- + methodName + " in class " + clazz.getName());
- } else if (list.size() > 1) {
- throw new NoSuchMethodException("Multiple setter for method "
- + methodName + " in class " + clazz.getName());
- }
-
- // Found a single method with the right name; check if
- // it is a setter.
- Method method = list.get(0);
- Class[] pars = method.getParameterTypes();
- if ( pars.length != 1 ||
- !( pars[0]==int.class || pars[0]==long.class ||
- pars[0]==double.class || pars[0]==float.class )
- ) {
- throw new NoSuchMethodException(method.getName() + " of class "
- + clazz.getName()
- + " is not a valid setter method: "+
- "it should have exactly one argument of type "+
- "int, long, short or double");
- }
-
- Class ret = method.getReturnType();
- if (!ret.equals(void.class)) {
- throw new NoSuchMethodException(method.getName() + " of class "
- + clazz.getName() +
- " is not a valid setter method; it returns a value");
- }
-
- return method;
-}
-
-//--------------------------------------------------------------------------
-
-
-/**
- * Returns the field type for the specified getter.
- */
-public static Class getGetterType(Method m)
-{
- return m.getReturnType();
-}
-
-//--------------------------------------------------------------------------
-
-/**
- * Returns the field type for the specified setter.
- */
-public static Class getSetterType(Method m)
-{
- Class[] pars = m.getParameterTypes();
- return pars[0];
-}
-
-//--------------------------------------------------------------------------
-
-}
