/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.sql.tree;
import com.google.common.base.Preconditions;
public class ComparisonExpression
extends Expression {
public enum Type {
EQUAL("="),
NOT_EQUAL("<>"),
LESS_THAN("<"),
LESS_THAN_OR_EQUAL("<="),
GREATER_THAN(">"),
GREATER_THAN_OR_EQUAL(">="),
IS_DISTINCT_FROM("IS DISTINCT FROM"),
REGEX_MATCH("~"),
REGEX_NO_MATCH("!~"),
REGEX_MATCH_CI("~*"),
REGEX_NO_MATCH_CI("!~*");
private final String value;
Type(String value) {
this.value = value;
}
public String getValue() {
return value;
}
}
private final Type type;
private final Expression left;
private final Expression right;
public ComparisonExpression(Type type, Expression left, Expression right) {
Preconditions.checkNotNull(type, "type is null");
Preconditions.checkNotNull(left, "left is null");
Preconditions.checkNotNull(right, "right is null");
this.type = type;
this.left = left;
this.right = right;
}
public Type getType() {
return type;
}
public Expression getLeft() {
return left;
}
public Expression getRight() {
return right;
}
@Override
public <R, C> R accept(AstVisitor<R, C> visitor, C context) {
return visitor.visitComparisonExpression(this, context);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
ComparisonExpression that = (ComparisonExpression) o;
if (!left.equals(that.left)) {
return false;
}
if (!right.equals(that.right)) {
return false;
}
if (type != that.type) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result = type.hashCode();
result = 31 * result + left.hashCode();
result = 31 * result + right.hashCode();
return result;
}
}