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Diffstat (limited to 'libjava/gnu/java/beans/decoder/MethodFinder.java')
-rw-r--r-- | libjava/gnu/java/beans/decoder/MethodFinder.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/libjava/gnu/java/beans/decoder/MethodFinder.java b/libjava/gnu/java/beans/decoder/MethodFinder.java deleted file mode 100644 index 3968b173adb..00000000000 --- a/libjava/gnu/java/beans/decoder/MethodFinder.java +++ /dev/null @@ -1,177 +0,0 @@ -/* gnu.java.beans.decoder.MethodFinder - Copyright (C) 2004 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 gnu.java.beans.decoder; - -import java.lang.reflect.Constructor; -import java.lang.reflect.Method; -import java.util.HashMap; - -class MethodFinder -{ - /** Provides a mapping between a wrapper class and its corresponding primitive's type. */ - private static HashMap typeMapping = new HashMap(); - - static { - typeMapping.put(Byte.class, Byte.TYPE); - typeMapping.put(Short.class, Short.TYPE); - typeMapping.put(Integer.class, Integer.TYPE); - typeMapping.put(Long.class, Long.TYPE); - typeMapping.put(Float.class, Float.TYPE); - typeMapping.put(Double.class, Double.TYPE); - - typeMapping.put(Character.class, Character.TYPE); - typeMapping.put(Boolean.class, Boolean.TYPE); - } - - private MethodFinder() - { - } - - /** Searches a Method which can accept the given arguments. - * - * @param klass - * @param name - * @param arguments - * @return - * @throws NoSuchMethodException - */ - static Method getMethod(Class klass, String name, Object[] arguments) - throws NoSuchMethodException - { - // prepares array containing the types of the arguments - Class[] argumentTypes = getArgumentTypes(arguments); - - Method[] methods = klass.getMethods(); - - // iterates over all public methods - for (int i = 0; i < methods.length; i++) - { - if (methods[i].getName().equals(name)) - { - if (matchingArgumentTypes(methods[i].getParameterTypes(), - argumentTypes)) - return methods[i]; - } - } - - throw new NoSuchMethodException( - "Could not find a matching method named " - + name - + "() in class " - + klass); - } - - static Constructor getConstructor(Class klass, Object[] arguments) - throws NoSuchMethodException - { - Class[] argumentTypes = getArgumentTypes(arguments); - Constructor[] constructors = klass.getConstructors(); - - // iterates over all public methods - for (int i = 0; i < constructors.length; i++) - { - if (matchingArgumentTypes(constructors[i].getParameterTypes(), - argumentTypes)) - return constructors[i]; - } - - throw new NoSuchMethodException( - "Could not find a matching constructor in class " + klass); - } - - /** Transforms an array of argument objects into an array of argument types. - * For each argument being null the argument is null, too. An argument type - * being null means: Accepts everything (although this can be ambigous). - * - * @param arguments - * @return - */ - private static Class[] getArgumentTypes(Object[] arguments) - { - if (arguments == null) - return new Class[0]; - - // prepares array containing the types of the arguments - Class[] argumentTypes = new Class[arguments.length]; - for (int i = 0; i < arguments.length; i++) - argumentTypes[i] = - (arguments[i] == null) ? null : arguments[i].getClass(); - return argumentTypes; - } - - /** Tests whether the argument types supplied to the method argument types - * are assignable. In addition to the assignment specifications this method - * handles the primitive's wrapper classes as if they were of their - * primitive type (e.g Boolean.class equals Boolean.TYPE). - * When a supplied argument type is null it is assumed that no argument - * object was supplied for it and the test for this particular parameter will - * pass. - * - * @param methodArgTypes - * @param suppliedArgTypes - * @return - */ - private static boolean matchingArgumentTypes( - Class[] methodArgTypes, - Class[] suppliedArgTypes) - { - if (methodArgTypes.length != suppliedArgTypes.length) - return false; - - for (int i = 0; i < methodArgTypes.length; i++) - { - if (suppliedArgTypes[i] == null) - { - // by definition a non-existant argument type (null) can be converted to everything - continue; - } - else if (typeMapping.containsKey(suppliedArgTypes[i])) - { - Class primitiveType = - (Class) typeMapping.get(suppliedArgTypes[i]); - if (!(methodArgTypes[i].isAssignableFrom(suppliedArgTypes[i]) - || methodArgTypes[i].isAssignableFrom(primitiveType))) - return false; - } - else if (!methodArgTypes[i].isAssignableFrom(suppliedArgTypes[i])) - return false; - } - - return true; - } -} |