/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.shardingsphere.sql.parser.oracle.visitor.statement.type;
  
  import org.apache.shardingsphere.sql.parser.api.ASTNode;
  import org.apache.shardingsphere.sql.parser.api.visitor.statement.type.TCLStatementVisitor;
  import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CommitContext;
  import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.RollbackContext;
  import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.SavepointContext;
  import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.SetConstraintsContext;
  import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.SetTransactionContext;
  import org.apache.shardingsphere.sql.parser.oracle.visitor.statement.OracleStatementVisitor;
  import org.apache.shardingsphere.sql.parser.sql.common.value.identifier.IdentifierValue;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.tcl.OracleCommitStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.tcl.OracleRollbackStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.tcl.OracleSavepointStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.tcl.OracleSetConstraintsStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.tcl.OracleSetTransactionStatement;
  
  /**
   * TCL statement visitor for Oracle.
   */
  public final class OracleTCLStatementVisitor extends OracleStatementVisitor implements TCLStatementVisitor {
      
      @Override
      public ASTNode visitSetTransaction(final SetTransactionContext ctx) {
          return new OracleSetTransactionStatement();
      }
      
      @Override
      public ASTNode visitCommit(final CommitContext ctx) {
          return new OracleCommitStatement();
      }
      
      @Override
      public ASTNode visitRollback(final RollbackContext ctx) {
          OracleRollbackStatement result = new OracleRollbackStatement();
          if (null != ctx.savepointClause().savepointName()) {
              result.setSavepointName(((IdentifierValue) visit(ctx.savepointClause().savepointName())).getValue());
          }
          return result;
      }
      
      @Override
      public ASTNode visitSavepoint(final SavepointContext ctx) {
          OracleSavepointStatement result = new OracleSavepointStatement();
          result.setSavepointName(((IdentifierValue) visit(ctx.savepointName())).getValue());
          return result;
      }
      
      @Override
      public ASTNode visitSetConstraints(final SetConstraintsContext ctx) {
          return new OracleSetConstraintsStatement();
      }
  }