BasicDataSource (Smart GWT EE Server API 5.0p (2021-05-26))

com.isomorphic.datasource.DataSource
- com.isomorphic.datasource.BasicDataSource

All Implemented Interfaces:

IToJSON

Direct Known Subclasses:

HibernateDataSource, JPADataSource, SQLDataSource
```
public class BasicDataSource
extends DataSource
```
A BasicDataSource is a DataSource that can create itself from configuration information expressed in XML.
BasicDataSource is the right class to extend when creating a custom DataSource connector.

See Also:
Serialized Form

Field Summary
- Fields inherited from class com.isomorphic.datasource.DataSource
  inInitState, OP_ADD, OP_CLIENT_EXPORT, OP_CUSTOM, OP_FETCH, OP_FILE_SOURCE, OP_GET_FILE, OP_HAS_FILE, OP_LIST_FILES, OP_REMOVE, OP_REMOVE_FILE, OP_RENAME_FILE, OP_SAVE_FILE, OP_UPDATE, OP_VALIDATE

Method Summary

Methods
Modifier and Type	Method and Description
`DataSource`	`getAuditDataSource()` This method returns the audit `DataSource` associated with this `DataSource` if it has the audit=true property set.
`java.lang.String`	`getProperty(java.lang.Object key)` Returns a property from the DataSource config.
`boolean`	`shouldAutoJoinTransaction(DSRequest req)` Returns true if the parameter DSRequest should automatically join an existing transaction, taking into account the DSRequest-specific override provided by `DSRequest.setJoinTransaction(java.lang.Boolean)`, the `transaction policy` of the controlling RPCManager (if there is one), and autoJoinTransactions settings at the operationBinding, DataSource, dbName and global system levels.
`boolean`	`shouldAutoStartTransaction(DSRequest req, boolean ignoreExistingTransaction)` Returns true if the parameter DSRequest should automatically start a new transaction, taking into account the DSRequest-specific override provided by `DSRequest.setJoinTransaction(java.lang.Boolean)`, the `transaction policy` of the controlling RPCManager (if there is one), and autoJoinTransactions settings at the operationBinding, DataSource, dbName and global system levels
`void`	`transformMultipleFields(DSRequest req)` Transforms the values for fields declared multiple:true in the incoming DSRequest.
`void`	`transformMultipleFields(DSResponse res)` Transform the values for fields declared multiple:true in a DSResponse.

Methods inherited from class com.isomorphic.datasource.DataSource
add, addDynamicDSGenerator, addDynamicDSGenerator, addDynamicDSGenerator, clearDynamicDSGenerators, execute, executeAdd, executeClientExport, executeCustom, executeFetch, executeFileSource, executeRemove, executeUpdate, fetch, fetch, fetchById, fetchSingle, fetchSingle, filter, filter, fromXML, fromXML, fromXML, fromXML, fromXML, fromXML, fromXML, fromXML, getAuditRevisionFieldName, getAuditTimestampFieldName, getAuditTypeFieldName, getAuditUserFieldName, getDefaultDynamicDSGenerator, getDynamicDSGenerators, getEnumConstantProperty, getEnumOrdinalProperty, getEnumTranslateStrategy, getField, getFieldNames, getFile, getFileAsInputStream, getFileAsString, getFileContentsField, getFileFormatField, getFileNameField, getFileTypeField, getListProperties, getListProperties, getPrimaryKey, getProperties, getProperties, getProperties, getPropertyJavaClass, getRecordXPath, getTransactionObject, getTransactionObject, hasFile, hasRecord, hasRecord, initialized, isModificationOperation, isServerOnly, listFiles, listFiles, remove, removeDynamicDSGenerator, removeDynamicDSGenerator, removeDynamicDSGenerator, removeFile, renameFile, saveFile, setEnumConstantProperty, setEnumOrdinalProperty, setEnumTranslateStrategy, setProperties, update, validate

Methods inherited from interface com.isomorphic.js.IToJSON
toJSON

- Method Detail
  - getProperty
```
public java.lang.String getProperty(java.lang.Object key)
```
    Returns a property from the DataSource config. This method allows a custom DataSource implementation to be configuration-driven like the built-in DataSource implementations are. So, if you add
```
    myNewProperty="some useful value"
 
```
    to the <DataSource> tag in your .ds.xml definition file, calling this method with a parameter of "myNewProperty" will return "some useful value" - the value you assigned in the DataSource definition.
    Parameters:
    key - The key to look up
    
    Returns:
    The property value as a String (non-String objects are converted using toString())
  - shouldAutoStartTransaction
```
public boolean shouldAutoStartTransaction(DSRequest req,
                                 boolean ignoreExistingTransaction)
                                   throws java.lang.Exception
```
    Returns true if the parameter DSRequest should automatically start a new transaction, taking into account the DSRequest-specific override provided by DSRequest.setJoinTransaction(java.lang.Boolean), the transaction policy of the controlling RPCManager (if there is one), and autoJoinTransactions settings at the operationBinding, DataSource, dbName and global system levels
    This method is part of the Automatic Transactions feature, which is effective only in Power edition and above.
    
    Parameters:
    req - The DSRequest to check
    ignoreExistingTransaction - If true, indicates that we should not take into account any existing transaction for this RPCManager when deciding if a transaction should be autoStarted. This is useful if you want to know if a request would have started a new transaction if one hadn't already been started.
    
    Throws:
    
    java.lang.Exception
  - shouldAutoJoinTransaction
```
public boolean shouldAutoJoinTransaction(DSRequest req)
                                  throws java.lang.Exception
```
    Returns true if the parameter DSRequest should automatically join an existing transaction, taking into account the DSRequest-specific override provided by DSRequest.setJoinTransaction(java.lang.Boolean), the transaction policy of the controlling RPCManager (if there is one), and autoJoinTransactions settings at the operationBinding, DataSource, dbName and global system levels.
    This method is part of the Automatic Transactions feature, which is effective only in Power edition and above.
    
    Parameters:
    req - The DSRequest to check
    
    Throws:
    
    java.lang.Exception
  - getAuditDataSource
```
public DataSource getAuditDataSource()
```
    This method returns the audit DataSource associated with this DataSource if it has the audit=true property set.
    The audit DataSource can only be accessed by ID if the original DataSource has been accessed first.
    
    Returns:
    The audit DataSource if audit was enabled, or null.
  - transformMultipleFields
```
public void transformMultipleFields(DSRequest req)
```
    Transforms the values for fields declared multiple:true in the incoming DSRequest. This allows advanced queries to take place on fields declared as multiple:true.
    See client-side docs for DataSourceField.multipleStorage for possible behaviors. This transformation is performed in DataSource.execute(), before operationType-specific methods like executeFetch or executeUpdate() are called.
    
    Overrides:
    
    transformMultipleFields in class DataSource
    
    Parameters:
    req - the request to be transformed.
  - transformMultipleFields
```
public void transformMultipleFields(DSResponse res)
```
    Transform the values for fields declared multiple:true in a DSResponse.
    See client-side docs for DataSourceField.multipleStorage for possible behaviors. This transformation is performed in DataSource.execute(), after operationType-specific methods like executeFetch or executeUpdate() are called.
    
    Overrides:
    
    transformMultipleFields in class DataSource
    
    Parameters:
    res - the DSResponse to be transformed.

Class BasicDataSource

Field Summary

Fields inherited from class com.isomorphic.datasource.DataSource

Method Summary

Methods inherited from class com.isomorphic.datasource.DataSource

Methods inherited from interface com.isomorphic.js.IToJSON

Method Detail

getProperty

shouldAutoStartTransaction

shouldAutoJoinTransaction

getAuditDataSource

transformMultipleFields

transformMultipleFields