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.commons.jxpath.util;
018
019import java.util.HashMap;
020
021/**
022 * Global type conversion utilities.
023 *
024 * @author Dmitri Plotnikov
025 * @version $Revision: 652845 $ $Date: 2008-05-02 19:46:46 +0200 (Fr, 02 Mai 2008) $
026 */
027public class TypeUtils {
028    private static TypeConverter typeConverter = new BasicTypeConverter();
029    private static final HashMap PRIMITIVE_TYPE_MAP = new HashMap() {
030        {
031            put(int.class, Integer.class);
032            put(byte.class, Byte.class);
033            put(short.class, Short.class);
034            put(char.class, Character.class);
035            put(long.class, Long.class);
036            put(float.class, Float.class);
037            put(double.class, Double.class);
038            put(boolean.class, Boolean.class);
039        }
040    };
041
042    /**
043     * Install an alternative type converter.
044     * @param converter new TypeConverter
045     */
046    public static synchronized void setTypeConverter(TypeConverter converter) {
047        typeConverter = converter;
048    }
049
050    /**
051     * Returns the current type converter.
052     * @return TypeConverter
053     */
054    public static TypeConverter getTypeConverter() {
055        return typeConverter;
056    }
057
058    /**
059     * Returns true if the global converter can convert the supplied
060     * object to the specified type.
061     * @param object object to test
062     * @param toType target class
063     * @return boolean
064     */
065    public static boolean canConvert(Object object, Class toType) {
066        return typeConverter.canConvert(object, toType);
067    }
068
069    /**
070     * Converts the supplied object to the specified type. May
071     * throw a RuntimeException.
072     * @param object object to convert
073     * @param toType target class
074     * @return resulting Object
075     */
076    public static Object convert(Object object, Class toType) {
077        return typeConverter.convert(object, toType);
078    }
079
080    /**
081     * Return the appropriate wrapper type for the specified class.
082     * @param p Class for which to retrieve a wrapper class.
083     * @return the wrapper if <code>p</code> is primitive, else <code>p</code>.
084     * @since JXPath 1.3
085     */
086    public static Class wrapPrimitive(Class p) {
087        return p.isPrimitive() ? (Class) PRIMITIVE_TYPE_MAP.get(p) : p;
088    }
089}