/**
    *    Copyright 2009-2015 the original author or authors.
    *
    *    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 org.apache.ibatis.executor.statement;
  
  import java.sql.Connection;
  import java.sql.SQLException;
  import java.sql.Statement;
  import java.util.List;
  
  import org.apache.ibatis.executor.Executor;
  import org.apache.ibatis.executor.ExecutorException;
  import org.apache.ibatis.executor.parameter.ParameterHandler;
  import org.apache.ibatis.mapping.BoundSql;
  import org.apache.ibatis.mapping.MappedStatement;
  import org.apache.ibatis.session.ResultHandler;
  import org.apache.ibatis.session.RowBounds;
  
  /**
   * @author Clinton Begin
   */
  public class RoutingStatementHandler implements StatementHandler {
  
    private final StatementHandler delegate;
  
    public RoutingStatementHandler(Executor executor, MappedStatement ms, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, BoundSql boundSql) {
  
      switch (ms.getStatementType()) {
        case STATEMENT:
          delegate = new SimpleStatementHandler(executor, ms, parameter, rowBounds, resultHandler, boundSql);
          break;
        case PREPARED:
          delegate = new PreparedStatementHandler(executor, ms, parameter, rowBounds, resultHandler, boundSql);
          break;
        case CALLABLE:
          delegate = new CallableStatementHandler(executor, ms, parameter, rowBounds, resultHandler, boundSql);
          break;
        default:
          throw new ExecutorException("Unknown statement type: " + ms.getStatementType());
      }
  
    }
  
    @Override
    public Statement prepare(Connection connection) throws SQLException {
      return delegate.prepare(connection);
    }
  
    @Override
    public void parameterize(Statement statement) throws SQLException {
      delegate.parameterize(statement);
    }
  
    @Override
    public void batch(Statement statement) throws SQLException {
      delegate.batch(statement);
    }
  
    @Override
    public int update(Statement statement) throws SQLException {
      return delegate.update(statement);
    }
  
    @Override
    public <E> List<E> query(Statement statement, ResultHandler resultHandler) throws SQLException {
      return delegate.<E>query(statement, resultHandler);
    }
  
    @Override
    public BoundSql getBoundSql() {
      return delegate.getBoundSql();
    }
  
    @Override
    public ParameterHandler getParameterHandler() {
      return delegate.getParameterHandler();
    }
  }