diff options
Diffstat (limited to 'gnu/java/beans/decoder/MethodFinder.java')
| -rw-r--r-- | gnu/java/beans/decoder/MethodFinder.java | 264 |
1 files changed, 132 insertions, 132 deletions
diff --git a/gnu/java/beans/decoder/MethodFinder.java b/gnu/java/beans/decoder/MethodFinder.java index 3968b173a..82783fbde 100644 --- a/gnu/java/beans/decoder/MethodFinder.java +++ b/gnu/java/beans/decoder/MethodFinder.java @@ -7,7 +7,7 @@ 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 @@ -43,135 +43,135 @@ 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; - } + /** 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; + } } |