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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.expr;

import studio.raptor.sqlparser.ast.SQLExprImpl;
import studio.raptor.sqlparser.ast.statement.SQLSelect;
import studio.raptor.sqlparser.visitor.SQLASTVisitor;

public class SQLAnyExpr extends SQLExprImpl {

  public SQLSelect subQuery;

  public SQLAnyExpr() {

  }

  public SQLAnyExpr(SQLSelect select) {

    this.subQuery = select;
  }

  public SQLSelect getSubQuery() {
    return this.subQuery;
  }

  public void setSubQuery(SQLSelect subQuery) {
    this.subQuery = subQuery;
  }

  public void output(StringBuffer buf) {
    this.subQuery.output(buf);
  }

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

    visitor.endVisit(this);
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((subQuery == null) ? 0 : subQuery.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    SQLAnyExpr other = (SQLAnyExpr) obj;
    if (subQuery == null) {
      if (other.subQuery != null) {
        return false;
      }
    } else if (!subQuery.equals(other.subQuery)) {
      return false;
    }
    return true;
  }
}