com.datastax.oss.driver.internal.querybuilder.select.ArithmeticSelector Maven / Gradle / Ivy
/*
* Copyright DataStax, 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,
* 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 com.datastax.oss.driver.internal.querybuilder.select;
import com.datastax.oss.driver.api.querybuilder.select.Selector;
import com.datastax.oss.driver.internal.querybuilder.ArithmeticOperator;
import com.datastax.oss.driver.shaded.guava.common.base.Preconditions;
import edu.umd.cs.findbugs.annotations.NonNull;
import net.jcip.annotations.Immutable;
@Immutable
public abstract class ArithmeticSelector implements Selector {
protected final ArithmeticOperator operator;
protected ArithmeticSelector(@NonNull ArithmeticOperator operator) {
Preconditions.checkNotNull(operator);
this.operator = operator;
}
@NonNull
public ArithmeticOperator getOperator() {
return operator;
}
protected static void appendAndMaybeParenthesize(
int myPrecedence, @NonNull Selector child, @NonNull StringBuilder builder) {
boolean parenthesize =
(child instanceof ArithmeticSelector)
&& (((ArithmeticSelector) child).operator.getPrecedenceLeft() < myPrecedence);
if (parenthesize) {
builder.append('(');
}
child.appendTo(builder);
if (parenthesize) {
builder.append(')');
}
}
}