Java Type Coerce coerce(Object obj, Class c)

Description

coerce

License

Open Source License

Declaration

public static Object coerce(Object obj, Class<?> c) 

Method Source Code

//package com.java2s;
/** //from w  ww.j a va 2  s. c o m
 * Copyright 2012 Rafal Lewczuk <rafal.lewczuk@jitlogic.com>
 * 
 * ZORKA is free software. You can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * ZORKA is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * ZORKA. If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    public static Object coerce(Object obj, Class<?> c) {

        if (obj == null || c == null) {
            return null;
        }
        if (obj.getClass() == c) {
            return obj;
        }

        if (c == Long.class) {
            return (obj instanceof String) ? Long.parseLong(obj.toString().trim()) : ((Number) obj).longValue();
        }

        if (c == Integer.class) {
            return (obj instanceof String) ? Integer.parseInt(obj.toString().trim()) : ((Number) obj).intValue();
        }

        if (c == Double.class) {
            return (obj instanceof String) ? Double.parseDouble(obj.toString().trim())
                    : ((Number) obj).doubleValue();
        }

        if (c == Short.class) {
            return (obj instanceof String) ? Short.parseShort(obj.toString().trim()) : ((Number) obj).shortValue();
        }

        if (c == Float.class) {
            return (obj instanceof String) ? Float.parseFloat(obj.toString().trim()) : ((Number) obj).floatValue();
        }

        if (c == String.class) {
            return "" + obj;
        }
        if (c == Boolean.class) {
            return coerceBool(obj);
        }

        return null;
    }

    public static boolean coerceBool(Object obj) {
        return !(obj == null || obj.equals(false));
    }
}

Related

1. coerce(final Class klass)
2. coerce(Object val, Class clz)
3. coerce(Object val, Class c)
4. coerce(Object value, Class clazz)
5. coerce(Object value, Class clazz)