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     */
017    package org.apache.commons.jxpath.util;
018    
019    import java.util.HashMap;
020    
021    /**
022     * Global type conversion utilities.
023     *
024     * @author Dmitri Plotnikov
025     * @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
026     */
027    public 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    }