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

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

public class SQLColumnDefinition extends SQLObjectImpl implements SQLTableElement {

    protected SQLName                         name;
    protected SQLDataType                     dataType;
    protected SQLExpr                         defaultExpr;
    protected final List constraints = new ArrayList(0);
    protected SQLExpr                          comment;

    protected Boolean                         enable;

    public SQLColumnDefinition(){

    }

    public Boolean getEnable() {
        return enable;
    }

    public void setEnable(Boolean enable) {
        this.enable = enable;
    }

    public SQLName getName() {
        return name;
    }

    public void setName(SQLName name) {
        this.name = name;
    }

    public SQLDataType getDataType() {
        return dataType;
    }

    public void setDataType(SQLDataType dataType) {
        this.dataType = dataType;
    }

    public SQLExpr getDefaultExpr() {
        return defaultExpr;
    }

    public void setDefaultExpr(SQLExpr defaultExpr) {
        if (defaultExpr != null) {
            defaultExpr.setParent(this);
        }
        this.defaultExpr = defaultExpr;
    }

    public List getConstraints() {
        return constraints;
    }

    @Override
    public void output(StringBuffer buf) {
        name.output(buf);
        buf.append(' ');
        this.dataType.output(buf);
        if (defaultExpr != null) {
            buf.append(" DEFAULT ");
            this.defaultExpr.output(buf);
        }
    }

    @Override
    protected void accept0(SQLASTVisitor visitor) {
        if (visitor.visit(this)) {
            this.acceptChild(visitor, name);
            this.acceptChild(visitor, dataType);
            this.acceptChild(visitor, defaultExpr);
            this.acceptChild(visitor, constraints);
        }
        visitor.endVisit(this);
    }

    public SQLExpr getComment() {
        return comment;
    }

    public void setComment(SQLExpr comment) {
        this.comment = comment;
    }

}