/*
* =============================================================================
*
* Copyright (c) 2011-2014, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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.
*
* =============================================================================
*/
package org.thymeleaf.standard.expression;
import java.math.BigDecimal;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.thymeleaf.Configuration;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.IProcessingContext;
import org.thymeleaf.exceptions.TemplateProcessingException;
import org.thymeleaf.util.EvaluationUtil;
/**
*
* @author Daniel Fernández
*
* @since 1.1
*
*/
public final class LessOrEqualToExpression extends GreaterLesserExpression {
private static final long serialVersionUID = 7042174616566611488L;
private static final Logger logger = LoggerFactory.getLogger(LessOrEqualToExpression.class);
public LessOrEqualToExpression(final IStandardExpression left, final IStandardExpression right) {
super(left, right);
}
@Override
public String getStringRepresentation() {
return getStringRepresentation(LESS_OR_EQUAL_TO_OPERATOR);
}
@SuppressWarnings("unchecked")
static Object executeLessOrEqualTo(final Configuration configuration, final IProcessingContext processingContext,
final LessOrEqualToExpression expression, final StandardExpressionExecutionContext expContext) {
if (logger.isTraceEnabled()) {
logger.trace("[THYMELEAF][{}] Evaluating LESS OR EQUAL TO expression: \"{}\"", TemplateEngine.threadIndex(), expression.getStringRepresentation());
}
Object leftValue = expression.getLeft().execute(configuration, processingContext, expContext);
Object rightValue = expression.getRight().execute(configuration, processingContext, expContext);
if (leftValue == null || rightValue == null) {
throw new TemplateProcessingException(
"Cannot execute LESS OR EQUAL TO comparison: operands are \"" + LiteralValue.unwrap(leftValue) + "\" and \"" + LiteralValue.unwrap(rightValue) + "\"");
}
leftValue = LiteralValue.unwrap(leftValue);
rightValue = LiteralValue.unwrap(rightValue);
Boolean result = null;
final BigDecimal leftNumberValue = EvaluationUtil.evaluateAsNumber(leftValue);
final BigDecimal rightNumberValue = EvaluationUtil.evaluateAsNumber(rightValue);
if (leftNumberValue != null && rightNumberValue != null) {
result = Boolean.valueOf(leftNumberValue.compareTo(rightNumberValue) != 1);
} else {
if (leftValue != null && rightValue != null &&
leftValue.getClass().equals(rightValue.getClass()) &&
Comparable.class.isAssignableFrom(leftValue.getClass())) {
result = Boolean.valueOf(((Comparable<Object>)leftValue).compareTo(rightValue) <= 0);
} else {
throw new TemplateProcessingException(
"Cannot execute LESS OR EQUAL TO from Expression \"" +
expression.getStringRepresentation() + "\". Left is \"" +
leftValue + "\", right is \"" + rightValue + "\"");
}
}
if (logger.isTraceEnabled()) {
logger.trace("[THYMELEAF][{}] Evaluating LESS OR EQUAL TO expression: \"{}\". Left is \"{}\", right is \"{}\". Result is \"{}\"",
new Object[] {TemplateEngine.threadIndex(), expression.getStringRepresentation(), leftValue, rightValue, result});
}
return result;
}
}