001/**
002 * Copyright (c) 2015-2022, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 * <p>
008 * http://www.apache.org/licenses/LICENSE-2.0
009 * <p>
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package io.jboot.db.model;
017
018
019public class Group extends Column {
020
021    private Columns columns;
022
023    public Group(Columns columns) {
024        this.columns = columns;
025    }
026
027    public Columns getColumns() {
028        return columns;
029    }
030
031    public void setColumns(Columns columns) {
032        this.columns = columns;
033    }
034
035    @Override
036    public boolean hasPara() {
037        return true;
038    }
039
040    @Override
041    public Object getValue() {
042        if (columns == null || columns.isEmpty()) {
043            return null;
044        } else {
045            return Util.getValueArray(columns.getList());
046        }
047    }
048}