java.lang.Object
- com.ibm.fhir.persistence.jdbc.dao.impl.FHIRDbDAOImpl

All Implemented Interfaces:

FHIRDbDAO

Direct Known Subclasses:

ParameterDAOImpl, ResourceDAOImpl
```
public class FHIRDbDAOImpl
extends Object
implements FHIRDbDAO
```
This class is a root Data Access Object for managing JDBC access to the FHIR database. As of 4.3.0, connection handling is factored out of the DAO and is instead the responsibility of the FHIRPersistenceJDBCImpl. Each DAO therefore requires a connection to be passed to it. This is good for separation of concerns, because the DAO code shouldn't care where the connection comes from. As each DAO is stateless, and lightweight, they can be created on-the-fly and handed a connection in the constructor. This pattern avoids polluting every method call with a connection parameter.

Constructor Summary

Constructors
Constructor	Description
`FHIRDbDAOImpl(Connection connection, String schemaName, FHIRDbFlavor flavor)`	Constructs a DAO instance suitable for acquiring DB connections via JNDI from the app server.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected FHIRPersistenceDataAccessException`	`buildExceptionWithIssue(String msg, IssueType issueType)`
`protected FHIRPersistenceDBConnectException`	`buildFHIRPersistenceDBConnectException(String msg, IssueType issueType)`
`protected void`	`cleanup(PreparedStatement stmt)`	Closes the passed PreparedStatement.
`protected void`	`cleanup(ResultSet resultSet, PreparedStatement stmt)`	Closes the passed ResultSet, PreparedStatement.
`protected Resource`	`createDTO(ResultSet resultSet)`	A method for creating a Data Transfer Object of type T from the contents of the passed ResultSet.
`protected List<Resource>`	`createDTOs(ResultSet resultSet)`	An method for creating a collection of Data Transfer Objects of type T from the contents of the passed ResultSet.
`Connection`	`getConnection()`	Getter for the connection being used by this DAO.
`FHIRDbFlavor`	`getFlavor()`	Get the database flavor, which describes the database type and its capabilities (e.g.
`String`	`getSchemaName()`	Getter for the schema name we've been configured for
`boolean`	`isDb2Database()`
`protected int`	`runCountQuery(String sql, Object... searchArgs)`	Creates and executes a PreparedStatement for the passed sql containing a 'SELECT COUNT...'.
`protected List<Resource>`	`runQuery(String sql, Object... searchArgs)`	Creates and executes a PreparedStatement using the passed parameters that returns a collection of FHIR Data Transfer Objects of type T.
`protected List<String>`	`runQuery_STR_VALUES(String sql, Object... searchArgs)`	Creates and executes a PreparedStatement using the passed parameters that returns a collection of String values.
`protected <XT extends FHIRPersistenceException> XT`	`severe(Logger logger, XT fx, String errorMessage, Throwable cause)`	Log the exception message here along with the cause stack.
`protected <XT extends FHIRPersistenceException> XT`	`severe(Logger logger, XT fx, Throwable cause)`	Convenience function to log the cause of an exception about to be thrown.

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FHIRDbDAOImpl
```
public FHIRDbDAOImpl(Connection connection,
                     String schemaName,
                     FHIRDbFlavor flavor)
```
    Constructs a DAO instance suitable for acquiring DB connections via JNDI from the app server.
- Method Detail
  - getConnection
```
public Connection getConnection()
```
    Getter for the connection being used by this DAO.
    
    Specified by:
    
    getConnection in interface FHIRDbDAO
    
    Returns:
  - getSchemaName
```
public String getSchemaName()
```
    Getter for the schema name we've been configured for
    
    Returns:
  - getFlavor
```
public FHIRDbFlavor getFlavor()
```
    Description copied from interface: FHIRDbDAO
    
    Get the database flavor, which describes the database type and its capabilities (e.g. is it multi-tenant?)
    
    Specified by:
    
    getFlavor in interface FHIRDbDAO
    
    Returns:
  - severe
```
protected <XT extends FHIRPersistenceException> XT severe(Logger logger,
                                                          XT fx,
                                                          Throwable cause)
```
    Convenience function to log the cause of an exception about to be thrown. This is useful when avoiding chaining the cause with the persistence exception, which could inadvertently leak sensitive information (details of the schema, for example)
    
    Parameters:
    
    logger -
    
    fx -
    
    cause -
    
    Returns:
  - severe
```
protected <XT extends FHIRPersistenceException> XT severe(Logger logger,
                                                          XT fx,
                                                          String errorMessage,
                                                          Throwable cause)
```
    Log the exception message here along with the cause stack. Return the exception fx to the caller so that it can be thrown easily.
    
    Parameters:
    
    logger -
    
    fx -
    
    errorMessage -
    
    cause -
    
    Returns:
  - cleanup
```
protected void cleanup(PreparedStatement stmt)
```
    Closes the passed PreparedStatement.
    
    Parameters:
    
    stmt -
    
    connection -
  - cleanup
```
protected void cleanup(ResultSet resultSet,
                       PreparedStatement stmt)
```
    Closes the passed ResultSet, PreparedStatement. We are no longer responsible for Connections so don't close them
    
    Parameters:
    
    resultSet -
    
    stmt -
  - runQuery
```
protected List<Resource> runQuery(String sql,
                                  Object... searchArgs)
                           throws FHIRPersistenceDataAccessException,
                                  FHIRPersistenceDBConnectException
```
    Creates and executes a PreparedStatement using the passed parameters that returns a collection of FHIR Data Transfer Objects of type T.
    
    Parameters:
    
    sql - - The SQL template to execute.
    
    searchArgs - - An array of arguments to be substituted into the SQL template.
    
    Returns:
    
    List - A List of FHIR Data Transfer Objects resulting from the executed query.
    
    Throws:
    
    FHIRPersistenceDataAccessException
    
    FHIRPersistenceDBConnectException
  - runCountQuery
```
protected int runCountQuery(String sql,
                            Object... searchArgs)
                     throws FHIRPersistenceDataAccessException,
                            FHIRPersistenceDBConnectException
```
    Creates and executes a PreparedStatement for the passed sql containing a 'SELECT COUNT...'. The count value is extracted from the ResultSet and returned as an int.
    
    Parameters:
    
    sql - - The SQL SELECT COUNT template to execute.
    
    searchArgs - - An array of arguments to be substituted into the SQL template.
    
    Returns:
    
    int - The count of results returned by the SQL query.
    
    Throws:
    
    FHIRPersistenceDataAccessException
    
    FHIRPersistenceDBConnectException
  - createDTOs
```
protected List<Resource> createDTOs(ResultSet resultSet)
                             throws FHIRPersistenceDataAccessException
```
    An method for creating a collection of Data Transfer Objects of type T from the contents of the passed ResultSet.
    
    Parameters:
    
    resultSet - A ResultSet containing FHIR persistent object data.
    
    Returns:
    
    List - A collection of FHIR Data Transfer objects of the same type.
    
    Throws:
    
    FHIRPersistenceDataAccessException
  - createDTO
```
protected Resource createDTO(ResultSet resultSet)
                      throws FHIRPersistenceDataAccessException
```
    A method for creating a Data Transfer Object of type T from the contents of the passed ResultSet.
    
    Parameters:
    
    resultSet - A ResultSet containing FHIR persistent object data.
    
    Returns:
    
    T - An instance of type T, which is a FHIR Data Transfer Object.
    
    Throws:
    
    FHIRPersistenceDataAccessException
  - isDb2Database
```
public boolean isDb2Database()
```
    Specified by:
    
    isDb2Database in interface FHIRDbDAO
    
    Returns:
    
    true if this DAO is connected to a DB2 database.
  - buildExceptionWithIssue
```
protected FHIRPersistenceDataAccessException buildExceptionWithIssue(String msg,
                                                                     IssueType issueType)
                                                              throws FHIRPersistenceDataAccessException
```
    Throws:
    
    FHIRPersistenceDataAccessException
  - buildFHIRPersistenceDBConnectException
```
protected FHIRPersistenceDBConnectException buildFHIRPersistenceDBConnectException(String msg,
                                                                                   IssueType issueType)
                                                                            throws FHIRPersistenceDBConnectException
```
    Throws:
    
    FHIRPersistenceDBConnectException
  - runQuery_STR_VALUES
```
protected List<String> runQuery_STR_VALUES(String sql,
                                           Object... searchArgs)
                                    throws FHIRPersistenceDataAccessException,
                                           FHIRPersistenceDBConnectException
```
    Creates and executes a PreparedStatement using the passed parameters that returns a collection of String values.
    
    Parameters:
    
    sql - - The SQL template to execute.
    
    searchArgs - - An array of arguments to be substituted into the SQL template.
    
    Returns:
    
    List - A List of strings resulting from the executed query.
    
    Throws:
    
    FHIRPersistenceDataAccessException
    
    FHIRPersistenceDBConnectException

Class FHIRDbDAOImpl

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

FHIRDbDAOImpl

Method Detail

getConnection

getSchemaName

getFlavor

severe

severe

cleanup

cleanup

runQuery

runCountQuery

createDTOs

createDTO

isDb2Database

buildExceptionWithIssue

buildFHIRPersistenceDBConnectException

runQuery_STR_VALUES