    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    }