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Cayenne Object Persistence Framework
/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.util;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.apache.cayenne.exp.ExpressionException;
/**
* 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 ExpressionException("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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