PostgresCodeSystemDAO (IBM FHIR Server)

java.lang.Object
- com.ibm.fhir.persistence.jdbc.dao.impl.CodeSystemDAOImpl
- - com.ibm.fhir.persistence.jdbc.postgres.PostgresCodeSystemDAO

All Implemented Interfaces:

CodeSystemDAO
```
public class PostgresCodeSystemDAO
extends CodeSystemDAOImpl
```
PostgreSql variant DAO used to manage code_systems records. Uses plain old JDBC statements instead of a stored procedure.

Field Summary
- Fields inherited from class com.ibm.fhir.persistence.jdbc.dao.impl.CodeSystemDAOImpl
  DEFAULT_TOKEN_SYSTEM

Constructor Summary

Constructors
Constructor Description

PostgresCodeSystemDAO(Connection c, String schemaName)
Public constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`readOrAddCodeSystem(String systemName)`	Calls a stored procedure to read the system contained in the passed Parameter in the Code_Systems table.

Methods inherited from class com.ibm.fhir.persistence.jdbc.dao.impl.CodeSystemDAOImpl
getConnection, getSchemaName, readAllCodeSystems, readCodeSystemId

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

- Constructor Detail
  - PostgresCodeSystemDAO
```
public PostgresCodeSystemDAO(Connection c,
                             String schemaName)
```
    Public constructor
    
    Parameters:
    
    c - connection to the database
    
    schemaName - the schema containing the FHIR data tables
- Method Detail
  - readOrAddCodeSystem
```
public int readOrAddCodeSystem(String systemName)
                        throws FHIRPersistenceDataAccessException
```
    Description copied from class: CodeSystemDAOImpl
    
    Calls a stored procedure to read the system contained in the passed Parameter in the Code_Systems table. If it's not in the DB, it will be stored and a unique id will be returned.
    
    Specified by:
    
    readOrAddCodeSystem in interface CodeSystemDAO
    
    Overrides:
    
    readOrAddCodeSystem in class CodeSystemDAOImpl
    
    Parameters:
    
    systemName - A valid FHIR search parameter name.
    
    Returns:
    
    The generated id of the stored system.
    
    Throws:
    
    FHIRPersistenceDataAccessException