/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * 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.alibaba.druid.sql.dialect.odps.ast;

import java.util.ArrayList;
import java.util.List;

import com.alibaba.druid.sql.ast.statement.SQLSelectItem;
import com.alibaba.druid.sql.dialect.odps.visitor.OdpsASTVisitor;
import com.alibaba.druid.sql.visitor.SQLASTVisitor;

public class OdpsUDTFSQLSelectItem extends SQLSelectItem implements OdpsObject {

    private final List<String> aliasList = new ArrayList<String>();

    public String getAlias() {
        throw new UnsupportedOperationException();
    }

    public void setAlias(String alias) {
        throw new UnsupportedOperationException();
    }

    public List<String> getAliasList() {
        return aliasList;
    }

    protected void accept0(SQLASTVisitor visitor) {
        accept0((OdpsASTVisitor) visitor);
    }
    
    public void accept0(OdpsASTVisitor visitor) {
        if (visitor.visit(this)) {
            acceptChild(visitor, this.expr);
        }
        visitor.endVisit(this);
    }

}