/*
* Copyright 1999-2012 Alibaba Group.
*
* 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.
*/
/**
* (created at 2011-1-23)
*/
package com.alibaba.cobar.parser.ast.expression.primary;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.alibaba.cobar.parser.ast.expression.Expression;
import com.alibaba.cobar.parser.visitor.SQLASTVisitor;
/**
* @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
*/
public class RowExpression extends PrimaryExpression {
private final List<Expression> rowExprList;
public RowExpression(List<Expression> rowExprList) {
if (rowExprList == null || rowExprList.isEmpty()) {
this.rowExprList = Collections.emptyList();
} else if (rowExprList instanceof ArrayList) {
this.rowExprList = rowExprList;
} else {
this.rowExprList = new ArrayList<Expression>(rowExprList);
}
}
/**
* @return never null
*/
public List<Expression> getRowExprList() {
return rowExprList;
}
@Override
public void accept(SQLASTVisitor visitor) {
visitor.visit(this);
}
}