/*
* =============================================================================
*
* Copyright (c) 2011-2016, 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.processor;
import org.thymeleaf.context.ITemplateContext;
import org.thymeleaf.engine.AttributeName;
import org.thymeleaf.model.IProcessableElementTag;
import org.thymeleaf.standard.expression.IStandardExpression;
import org.thymeleaf.standard.expression.IStandardExpressionParser;
import org.thymeleaf.standard.expression.StandardExpressions;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.util.EvaluationUtils;
/**
*
* @author Daniel Fernández
*
* @since 3.0.0
*
*/
public final class StandardIfTagProcessor extends AbstractStandardConditionalVisibilityTagProcessor {
public static final int PRECEDENCE = 300;
public static final String ATTR_NAME = "if";
public StandardIfTagProcessor(final TemplateMode templateMode, final String dialectPrefix) {
super(templateMode, dialectPrefix, ATTR_NAME, PRECEDENCE);
}
@Override
protected boolean isVisible(
final ITemplateContext context,
final IProcessableElementTag tag,
final AttributeName attributeName, final String attributeValue) {
final IStandardExpressionParser expressionParser = StandardExpressions.getExpressionParser(context.getConfiguration());
final IStandardExpression expression =
expressionParser.parseExpression(context, attributeValue);
final Object value = expression.execute(context);
return EvaluationUtils.evaluateAsBoolean(value);
}
}