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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 com.google.common.base.Preconditions.checkNotNull;
import java.io.Serializable;
import org.tikv.expression.visitor.ProtoConverter;
public class ByItem implements Serializable {
private Expression expr;
private boolean desc;
public static ByItem create(Expression expr, boolean desc) {
return new ByItem(expr, desc);
}
private ByItem(Expression expr, boolean desc) {
checkNotNull(expr, "Expr cannot be null for ByItem");
this.expr = expr;
this.desc = desc;
}
public com.pingcap.tidb.tipb.ByItem toProto(Object context) {
com.pingcap.tidb.tipb.ByItem.Builder builder = com.pingcap.tidb.tipb.ByItem.newBuilder();
return builder.setExpr(ProtoConverter.toProto(expr, context)).setDesc(desc).build();
}
public Expression getExpr() {
return expr;
}
public boolean isDesc() {
return desc;
}
@Override
public String toString() {
return String.format("[%s %s]", expr.toString(), desc ? "DESC" : "ASC");
}
}