Data type conversion
/*
*
* The ObjectStyle Group Software License, version 1.1
* ObjectStyle Group - http://objectstyle.org/
*
* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. 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 independent contributors
* and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, email
* "andrus at objectstyle dot org".
*
* 5. Products derived from this software may not be called "ObjectStyle"
* or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
* names without prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE OBJECTSTYLE GROUP OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* 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 and hosted on ObjectStyle Group web site. For more
* information on the ObjectStyle Group, please see
* <http://objectstyle.org/>.
*/
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* A collection of static conversion utility methods.
*
* @since 1.1
* @author Andrei Adamchik
*/
public final class ConversionUtil {
public static int toInt(Object object, int defaultValue) {
if (object == null) {
return defaultValue;
}
else if (object instanceof Number) {
return ((Number) object).intValue();
}
else if (object instanceof String) {
try {
return Integer.parseInt((String) object);
}
catch (NumberFormatException ex) {
return defaultValue;
}
}
return defaultValue;
}
public static boolean toBoolean(Object object) {
if (object instanceof Boolean) {
return ((Boolean) object).booleanValue();
}
if (object instanceof Number) {
return ((Number) object).intValue() != 0;
}
return object != null;
}
public static BigDecimal toBigDecimal(Object object) {
if (object == null) {
return null;
}
else if (object instanceof BigDecimal) {
return (BigDecimal) object;
}
else if (object instanceof BigInteger) {
return new BigDecimal((BigInteger) object);
}
else if (object instanceof Number) {
return new BigDecimal(((Number) object).doubleValue());
}
throw new Exception("Can't convert to BigDecimal: " + object);
}
/**
* Attempts to convert an object to Comparable instance.
*/
public static Comparable toComparable(Object object) {
if (object == null) {
return null;
}
else if (object instanceof Comparable) {
return (Comparable) object;
}
else if (object instanceof StringBuffer) {
return object.toString();
}
else if (object instanceof char[]) {
return new String((char[]) object);
}
else {
throw new ClassCastException(
"Invalid Comparable class:" + object.getClass().getName());
}
}
/**
* Attempts to convert an object to Comparable instance.
*/
public static String toString(Object object) {
if (object == null) {
return null;
}
else if (object instanceof String) {
return (String) object;
}
else if (object instanceof StringBuffer) {
return object.toString();
}
else if (object instanceof char[]) {
return new String((char[]) object);
}
else {
throw new ClassCastException(
"Invalid class for String conversion:" + object.getClass().getName());
}
}
/**
* Attempts to convert an object to an uppercase string.
*/
public static Object toUpperCase(Object object) {
if ((object instanceof String) || (object instanceof StringBuffer)) {
return object.toString().toUpperCase();
}
else if (object instanceof char[]) {
return new String((char[]) object).toUpperCase();
}
else {
return object;
}
}
private ConversionUtil() {
}
}
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