/*
* #%L
* BroadleafCommerce Common Libraries
* %%
* Copyright (C) 2009 - 2016 Broadleaf Commerce
* %%
* Licensed 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.
* #L%
*/
package org.broadleafcommerce.common.web.patch;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* Source for this patch is taken from https://github.com/thymeleaf/thymeleaf/commit/fc360d0d50df5090f93f6922012463055f28896d.
* This is part of https://github.com/thymeleaf/thymeleaf/issues/449, which will be resolved in 2.1.5-RELEASE (not released yet).
* This fix benefits the performance of many Broadleaf templates that utilize string concatenation in expressions.
*
* When Thymeleaf 2.1.5 is released, the Broadleaf dependency should be updated and this patch should be removed.
*
* @author Jeff Fischer
*/
public class EvaluationUtilPatch {
public static BigDecimal evaluateAsNumber(final Object object) {
if (object == null) {
return null;
}
if (object instanceof Number) {
if (object instanceof BigDecimal) {
return (BigDecimal)object;
} else if (object instanceof BigInteger) {
return new BigDecimal((BigInteger)object);
} else if (object instanceof Short) {
return new BigDecimal(((Short)object).intValue());
} else if (object instanceof Integer) {
return new BigDecimal(((Integer)object).intValue());
} else if (object instanceof Long) {
return new BigDecimal(((Long)object).longValue());
} else if (object instanceof Float) {
//noinspection UnpredictableBigDecimalConstructorCall
return new BigDecimal(((Float)object).doubleValue());
} else if (object instanceof Double) {
//noinspection UnpredictableBigDecimalConstructorCall
return new BigDecimal(((Double)object).doubleValue());
}
} else if (object instanceof String && ((String)object).length() > 0) {
final char c0 = ((String)object).charAt(0);
// This test will avoid trying to create the BigDecimal most of the times, which
// will improve performance by avoiding lots of NumberFormatExceptions
if ((c0 >= '0' && c0 <= '9') || c0 == '+' || c0 == '-') {
try {
return new BigDecimal(((String)object).trim());
} catch (final NumberFormatException ignored) {
return null;
}
}
}
return null;
}
}