Java Class Load fromString(final Class clazz, final String value)

Description

Convert the given String to the given class.

License

Open Source License

Parameter

Parameter	Description
clazz	The destination class.
value	The String value to convert.

Exception

Parameter	Description
Exception	If the given value cannot be transformed.

Return

The converted value.

Declaration

@SuppressWarnings({ "unchecked", "rawtypes" })
public static <T> T fromString(final Class<T> clazz, final String value) throws Exception 

Method Source Code

//package com.java2s;
/**/*from ww  w  .j  a  va2s. c o m*/
 * Copyright (c) 2010 Ignasi Barrera
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

public class Main {
    /**
     * Convert the given String to the given class.
     * 
     * @param clazz The destination class.
     * @param value The String value to convert.
     * @return The converted value.
     * @throws Exception If the given value cannot be transformed.
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static <T> T fromString(final Class<T> clazz, final String value) throws Exception {
        if (value == null) {
            return null;
        } else if (clazz.equals(String.class)) {
            return (T) value;
        } else if (clazz.equals(Integer.class)) {
            return (T) Integer.valueOf(value);
        } else if (clazz.equals(Double.class)) {
            return (T) Double.valueOf(value);
        } else if (clazz.equals(Float.class)) {
            return (T) Float.valueOf(value);
        } else if (clazz.equals(Boolean.class)) {
            return (T) Boolean.valueOf(value);
        } else if (clazz.equals(Byte.class)) {
            return (T) Byte.valueOf(value);
        } else if (clazz.equals(Long.class)) {
            return (T) Long.valueOf(value);
        } else if (clazz.equals(Short.class)) {
            return (T) Short.valueOf(value);
        } else if (clazz.isEnum()) {
            return (T) Enum.valueOf((Class<Enum>) clazz, value);
        }

        throw new Exception("Could not transform [" + value + "] to an object of class [" + clazz.getName() + "]");
    }
}

Related

1. fromString(Class clazz, String stringValue)
2. fromString(Class clazz, String name)
3. fromString(Class clz, String value, T defaultVal)
4. fromString(Class enumClass, String s, T defaultValue)
5. fromString(Class enumType, String text)
6. fromString(String string, Class arrayClass)
7. getClass(Class clazz)
8. getClass(String className)
9. getClass(String className)