proposal/mutant/src/java/antlibs/system/org/apache/ant/antlib/system/PrimitiveConverter.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
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 *
 * 5. Products derived from this software may not be called "Apache"
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.ant.antlib.system;

import org.apache.ant.common.antlib.AbstractConverter;
import org.apache.ant.common.util.ExecutionException;
import org.apache.ant.common.util.PropertyUtils;

/**
 * A converter to convert to Java's primitie types
 *
 * @author <a href="mailto:conor@apache.org">Conor MacNeill</a>
 */
public class PrimitiveConverter extends AbstractConverter {

    /**
     * Get the list of classes this converter is able to convert to.
     *
     * @return an array of Class objects representing the classes this
     *      converter handles.
     */
    public Class[] getTypes() {
        return new Class[] {
            Character.class, Character.TYPE, Byte.TYPE, Short.TYPE, 
            Integer.TYPE, Long.TYPE, Float.TYPE, Double.TYPE, 
            Boolean.class, Boolean.TYPE};
    }

    /**
     * Convert a string from the value given to an instance of the given
     * type.
     *
     * @param value The value to be converted
     * @param type the desired type of the converted object
     * @return the value of the converted object
     * @exception ExecutionException if the conversion cannot be made
     */
    public Object convert(String value, Class type) throws ExecutionException {
        if (type.equals(Character.class) 
                || type.equals(Character.TYPE)) {
            return new Character(value.charAt(0));
        } else if (type.equals(Byte.TYPE)) {
            return new Byte(value);
        } else if (type.equals(Short.TYPE)) {
            return new Short(value);
        } else if (type.equals(Integer.TYPE)) {
            return new Integer(value);
        } else if (type.equals(Long.TYPE)) {
            return new Long(value);
        } else if (type.equals(Float.TYPE)) {
            return new Float(value);
        } else if (type.equals(Double.TYPE)) {
            return new Double(value);
        } else if (type.equals(Boolean.class) 
                || type.equals(Boolean.TYPE)) {
            return new Boolean(PropertyUtils.toBoolean(value));
        }
        throw new ExecutionException("This converter does not handle " 
            + type.getName()); 
    }
}