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/*
 * 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 studio.raptor.sqlparser.ast.statement;

import studio.raptor.sqlparser.ast.SQLExpr;
import studio.raptor.sqlparser.ast.SQLObjectImpl;
import studio.raptor.sqlparser.visitor.SQLASTVisitor;

public class SQLAssignItem extends SQLObjectImpl {

  private SQLExpr target;
  private SQLExpr value;

  public SQLAssignItem() {
  }

  public SQLAssignItem(SQLExpr target, SQLExpr value) {
    setTarget(target);
    setValue(value);
  }

  public SQLExpr getTarget() {
    return target;
  }

  public void setTarget(SQLExpr target) {
    if (target != null) {
      target.setParent(this);
    }
    this.target = target;
  }

  public SQLExpr getValue() {
    return value;
  }

  public void setValue(SQLExpr value) {
    if (value != null) {
      value.setParent(this);
    }
    this.value = value;
  }

  public void output(StringBuffer buf) {
    target.output(buf);
    buf.append(" = ");
    value.output(buf);
  }

  @Override
  protected void accept0(SQLASTVisitor visitor) {
    if (visitor.visit(this)) {
      acceptChild(visitor, this.target);
      acceptChild(visitor, this.value);
    }
    visitor.endVisit(this);
  }

}