studio.raptor.sqlparser.ast.expr.SQLSequenceExpr Maven / Gradle / Ivy

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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.SQLName;
import studio.raptor.sqlparser.visitor.SQLASTVisitor;

public class SQLSequenceExpr extends SQLExprImpl {

  private SQLName sequence;
  private Function function;

  public SQLSequenceExpr() {

  }

  public SQLSequenceExpr(SQLName sequence, Function function) {
    this.sequence = sequence;
    this.function = function;
  }

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

  public SQLName getSequence() {
    return sequence;
  }

  public void setSequence(SQLName sequence) {
    this.sequence = sequence;
  }

  public Function getFunction() {
    return function;
  }

  public void setFunction(Function function) {
    this.function = function;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((function == null) ? 0 : function.hashCode());
    result = prime * result + ((sequence == null) ? 0 : sequence.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;
    }
    SQLSequenceExpr other = (SQLSequenceExpr) obj;
    if (function != other.function) {
      return false;
    }
    if (sequence == null) {
      if (other.sequence != null) {
        return false;
      }
    } else if (!sequence.equals(other.sequence)) {
      return false;
    }
    return true;
  }

  public static enum Function {
    NextVal("NEXTVAL"), CurrVal("CURRVAL"), PrevVal("PREVVAL");

    public final String name;
    public final String name_lcase;

    private Function(String name) {
      this.name = name;
      this.name_lcase = name.toLowerCase();
    }
  }

}