/*
* =============================================================================
*
* 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.expression;
import java.lang.reflect.Method;
/**
*
* @author Daniel Fernández
*
* @since 1.1
*
*/
public abstract class GreaterLesserExpression extends BinaryOperationExpression {
private static final long serialVersionUID = 3488922833645278122L;
protected static final String GREATER_THAN_OPERATOR = ">";
protected static final String GREATER_OR_EQUAL_TO_OPERATOR = ">=";
protected static final String LESS_THAN_OPERATOR = "<";
protected static final String LESS_OR_EQUAL_TO_OPERATOR = "<=";
protected static final String GREATER_THAN_OPERATOR_2 = "gt";
protected static final String GREATER_OR_EQUAL_TO_OPERATOR_2 = "ge";
protected static final String LESS_THAN_OPERATOR_2 = "lt";
protected static final String LESS_OR_EQUAL_TO_OPERATOR_2 = "le";
static final String[] OPERATORS = new String[] {
GREATER_THAN_OPERATOR, GREATER_OR_EQUAL_TO_OPERATOR, LESS_THAN_OPERATOR, LESS_OR_EQUAL_TO_OPERATOR,
GREATER_THAN_OPERATOR_2, GREATER_OR_EQUAL_TO_OPERATOR_2, LESS_THAN_OPERATOR_2, LESS_OR_EQUAL_TO_OPERATOR_2};
private static final boolean[] LENIENCIES = new boolean[] { false, false, false, false, false, false, false, false };
@SuppressWarnings("unchecked")
private static final Class<? extends BinaryOperationExpression>[] OPERATOR_CLASSES =
(Class<? extends BinaryOperationExpression>[]) new Class<?>[] {
GreaterThanExpression.class, GreaterOrEqualToExpression.class,
LessThanExpression.class, LessOrEqualToExpression.class,
GreaterThanExpression.class, GreaterOrEqualToExpression.class,
LessThanExpression.class, LessOrEqualToExpression.class};
private static final Method LEFT_ALLOWED_METHOD;
private static final Method RIGHT_ALLOWED_METHOD;
static {
try {
LEFT_ALLOWED_METHOD = GreaterLesserExpression.class.getDeclaredMethod("isLeftAllowed", IStandardExpression.class);
RIGHT_ALLOWED_METHOD = GreaterLesserExpression.class.getDeclaredMethod("isRightAllowed", IStandardExpression.class);
} catch (final NoSuchMethodException e) {
throw new ExceptionInInitializerError(e);
}
}
protected GreaterLesserExpression(final IStandardExpression left, final IStandardExpression right) {
super(left, right);
}
static boolean isRightAllowed(final IStandardExpression right) {
return right != null && !(right instanceof Token && !(right instanceof NumberTokenExpression || right instanceof GenericTokenExpression));
}
static boolean isLeftAllowed(final IStandardExpression left) {
return left != null && !(left instanceof Token && !(left instanceof NumberTokenExpression || left instanceof GenericTokenExpression));
}
protected static ExpressionParsingState composeGreaterLesserExpression(
final ExpressionParsingState state, final int nodeIndex) {
return composeBinaryOperationExpression(
state, nodeIndex, OPERATORS, LENIENCIES, OPERATOR_CLASSES, LEFT_ALLOWED_METHOD, RIGHT_ALLOWED_METHOD);
}
}