org.paneris.jal.model
Class DataCache

java.lang.Object
  org.paneris.jal.model.DataCache

public class DataCache
extends java.lang.Object

This class is a Singleton that provides access to datadictionary objects. if a datadictionary has not yet been cached, it is created in the conventional manner. A client gets access to the single instance through the static getInstance() method and can then grap datadictionary objects

Method Summary

DDRecord	getDDRecord(java.lang.String db, java.lang.String tn, java.lang.Integer fn) returns a reference to a cached DDRecord (assuming it is cached).
FieldMetaData	getFieldMetaData(java.lang.String db, java.lang.Integer fieldNumber) returns a reference to fieldmetadata for a given field (given as an integer)
static DataCache	getInstance() Returns the single instance, creating one if it's the first time this method is called.
TableMetaData	getTableMetaData(java.lang.String db, java.lang.Integer tableNumber) returns a reference to tablemetadata for a given table (given as an Integer)
TableMetaData	getTableMetaData(java.lang.String db, java.lang.String tableName) returns a reference to tablemetadata for a given table (given as a string)
DDRecord	putDDRecords(java.lang.String db, java.lang.String tn, java.lang.Integer fn)
FieldMetaData	putFieldMetaData(java.lang.String db, java.lang.Integer fieldNumber) adds a fieldmetadata for a given field (given as a integer)
TableMetaData	putTableMetaData(java.lang.String db, java.lang.Integer tableNumber) adds a tablemetadata for a given table (given as a Integer)
TableMetaData	putTableMetaData(java.lang.String db, java.lang.String tableName) adds a tablemetadata for a given table (given as a string)
void	removeDDRecords(java.lang.String db, java.lang.String tn, java.lang.Integer fn) removes a tablemetadata for a given table (given as a string)
void	removeFieldMetaData(java.lang.String db, java.lang.Integer fieldNumber) removes a tablemetadata for a given table (given as a string)
void	removeTableMetaData(java.lang.String db, java.lang.Integer tableNumber) removes a tablemetadata for a given table (given as a string)
void	removeTableMetaData(java.lang.String db, java.lang.String tableName) removes a tablemetadata for a given table (given as a string)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static DataCache getInstance()

Returns the single instance, creating one if it's the first time this method is called.

Returns:

DataCache - The single instance.

getTableMetaData

public TableMetaData getTableMetaData(java.lang.String db,
                                      java.lang.String tableName)
                               throws java.lang.Exception

returns a reference to tablemetadata for a given table (given as a string)

Throws:

java.lang.Exception

putTableMetaData

public TableMetaData putTableMetaData(java.lang.String db,
                                      java.lang.String tableName)
                               throws java.lang.Exception

adds a tablemetadata for a given table (given as a string)

Throws:

java.lang.Exception

removeTableMetaData

public void removeTableMetaData(java.lang.String db,
                                java.lang.String tableName)
                         throws java.lang.Exception

removes a tablemetadata for a given table (given as a string)

Throws:

java.lang.Exception

getTableMetaData

public TableMetaData getTableMetaData(java.lang.String db,
                                      java.lang.Integer tableNumber)
                               throws java.lang.Exception

returns a reference to tablemetadata for a given table (given as an Integer)

Throws:

java.lang.Exception

putTableMetaData

public TableMetaData putTableMetaData(java.lang.String db,
                                      java.lang.Integer tableNumber)
                               throws java.lang.Exception

adds a tablemetadata for a given table (given as a Integer)

Throws:

java.lang.Exception

removeTableMetaData

public void removeTableMetaData(java.lang.String db,
                                java.lang.Integer tableNumber)
                         throws java.lang.Exception

removes a tablemetadata for a given table (given as a string)

Throws:

java.lang.Exception

getFieldMetaData

public FieldMetaData getFieldMetaData(java.lang.String db,
                                      java.lang.Integer fieldNumber)
                               throws java.lang.Exception

returns a reference to fieldmetadata for a given field (given as an integer)

Throws:

java.lang.Exception

putFieldMetaData

public FieldMetaData putFieldMetaData(java.lang.String db,
                                      java.lang.Integer fieldNumber)
                               throws java.lang.Exception

adds a fieldmetadata for a given field (given as a integer)

Throws:

java.lang.Exception

removeFieldMetaData

public void removeFieldMetaData(java.lang.String db,
                                java.lang.Integer fieldNumber)
                         throws java.lang.Exception

removes a tablemetadata for a given table (given as a string)

Throws:

java.lang.Exception

getDDRecord

public DDRecord getDDRecord(java.lang.String db,
                            java.lang.String tn,
                            java.lang.Integer fn)
                     throws java.lang.Exception

returns a reference to a cached DDRecord (assuming it is cached). if it isn't, then it just does the sql lookup itself. This is used for caching of automatic lookup fields

Throws:

java.lang.Exception

putDDRecords

public DDRecord putDDRecords(java.lang.String db,
                             java.lang.String tn,
                             java.lang.Integer fn)
                      throws java.lang.Exception

Throws:

java.lang.Exception

removeDDRecords

public void removeDDRecords(java.lang.String db,
                            java.lang.String tn,
                            java.lang.Integer fn)
                     throws java.lang.Exception

removes a tablemetadata for a given table (given as a string)

Throws:

java.lang.Exception