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/*
 * Copyright 1999-2101 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.sharksharding.sql.ast.statement;

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

import com.sharksharding.sql.ast.SQLExpr;
import com.sharksharding.sql.ast.SQLObjectImpl;
import com.sharksharding.sql.visitor.SQLASTVisitor;

public class SQLSelectGroupByClause extends SQLObjectImpl {

    private final List items = new ArrayList();
    private SQLExpr             having;

    public SQLSelectGroupByClause(){

    }

    protected void accept0(SQLASTVisitor visitor) {
        if (visitor.visit(this)) {
            acceptChild(visitor, this.items);
            acceptChild(visitor, this.having);
        }

        visitor.endVisit(this);
    }

    public SQLExpr getHaving() {
        return this.having;
    }

    public void setHaving(SQLExpr having) {
        this.having = having;
    }

    public List getItems() {
        return this.items;
    }

    public void addItem(SQLExpr sqlExpr) {
        if (sqlExpr != null) {
            sqlExpr.setParent(this);
            this.items.add(sqlExpr);
        }
    }
}