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/*
* Copyright 2017 PingCAP, Inc.
*
* 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,
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.tikv.expression;
import static java.util.Objects.requireNonNull;
import com.google.common.collect.ImmutableList;
import java.util.List;
import java.util.Objects;
public class Not implements Expression {
public static Not not(Expression expression) {
return new Not(expression);
}
private Expression expression;
public Not(Expression expression) {
this.expression = requireNonNull(expression, "expression is null");
}
public Expression getExpression() {
return expression;
}
@Override
public List<Expression> getChildren() {
return ImmutableList.of(expression);
}
@Override
public <R, C> R accept(Visitor<R, C> visitor, C context) {
return visitor.visit(this, context);
}
@Override
public String toString() {
return String.format("Not(%s)", getExpression());
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof Not)) {
return false;
}
Not that = (Not) other;
return Objects.equals(expression, that.expression);
}
@Override
public int hashCode() {
return Objects.hashCode(expression);
}
}