001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 */
017package org.apache.xbean.finder.util;
018
019import java.lang.reflect.Array;
020import java.util.ArrayList;
021import java.util.HashMap;
022import java.util.List;
023import java.util.Map;
024
025public class Classes {
026
027    private static final Map<Class<?>, Class<?>> primitiveWrappers = new HashMap<Class<?>, Class<?>>();
028    private static final HashMap<String, Class> primitives = new HashMap<String, Class>();
029
030    static {
031        primitives.put("boolean", boolean.class);
032        primitives.put("byte", byte.class);
033        primitives.put("char", char.class);
034        primitives.put("short", short.class);
035        primitives.put("int", int.class);
036        primitives.put("long", long.class);
037        primitives.put("float", float.class);
038        primitives.put("double", double.class);
039
040        primitiveWrappers.put(boolean.class, Boolean.class);
041        primitiveWrappers.put(byte.class, Byte.class);
042        primitiveWrappers.put(char.class, Character.class);
043        primitiveWrappers.put(double.class, Double.class);
044        primitiveWrappers.put(float.class, Float.class);
045        primitiveWrappers.put(int.class, Integer.class);
046        primitiveWrappers.put(long.class, Long.class);
047        primitiveWrappers.put(short.class, Short.class);
048    }
049
050    public static boolean equals(String classNameA, String classNameB) {
051        return classNameA.equals(classNameB);
052    }
053
054    public static Class forName(String string, ClassLoader classLoader) throws ClassNotFoundException {
055        int arrayDimentions = 0;
056        while (string.endsWith("[]")){
057            string = string.substring(0, string.length() - 2);
058            arrayDimentions++;
059        }
060
061        Class clazz = primitives.get(string);
062
063        if (clazz == null) clazz = Class.forName(string, true, classLoader);
064
065        if (arrayDimentions == 0){
066            return clazz;
067        }
068        return Array.newInstance(clazz, new int[arrayDimentions]).getClass();
069    }
070
071    public static String packageName(Class clazz){
072        return packageName(clazz.getName());
073    }
074
075    public static String packageName(String clazzName){
076        int i = clazzName.lastIndexOf('.');
077        if (i > 0){
078            return clazzName.substring(0, i);
079        } else {
080            return "";
081        }
082    }
083
084    public static List<String> getSimpleNames(Class... classes){
085        List<String> list = new ArrayList<String>();
086        for (Class aClass : classes) {
087            list.add(aClass.getSimpleName());
088        }
089
090        return list;
091    }
092
093    public static Class<?> deprimitivize(Class<?> fieldType) {
094        return fieldType = fieldType.isPrimitive() ? primitiveWrappers.get(fieldType): fieldType;
095    }
096}