Mybatis源码之RoutingStatementHandler

/**
* @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());
}

}

public Statement prepare(Connection connection) throws SQLException {
return delegate.prepare(connection);
}

public void parameterize(Statement statement) throws SQLException {
delegate.parameterize(statement);
}

public void batch(Statement statement) throws SQLException {
delegate.batch(statement);
}

public int update(Statement statement) throws SQLException {
return delegate.update(statement);
}

public <E> List<E> query(Statement statement, ResultHandler resultHandler) throws SQLException {
return delegate.<E>query(statement, resultHandler);
}

public BoundSql getBoundSql() {
return delegate.getBoundSql();
}

public ParameterHandler getParameterHandler() {
return delegate.getParameterHandler();
}
}