GAEJPADataSource (SmartClient Enterprise Server API 12.1p (2024-11-05))

java.lang.Object
- com.isomorphic.base.Base
- - com.isomorphic.datasource.DataSource
  - - com.isomorphic.datasource.BasicDataSource
    - - com.isomorphic.jpa.JPADataSource
      - com.isomorphic.jpa.GAEJPADataSource

All Implemented Interfaces:

IToJSON
```
public class GAEJPADataSource
extends JPADataSource
```
Server side implementation of JPA 1.0 data source under Google Application Engine.
There are four main differences:
- GAE supports queries with LIKE clause only with single wildcard at the end thus TextMatchStyle.SUBSTRING works exactly as TextMatchStyle.STARTS_WITH
- GAE does not support upper()/lower(). Search queries are always case sensitive.
- Exact match is used when comparing number fields.
- GAE does not support FetchType.EAGER. Every method should initialize lazily loaded properties of every entity loaded from data source.
This class implements only simple search criteria.
Implementation is not thread-safe. Data source acquiring mechanism ensures that single instance of this class will be used in one thread only.
See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static boolean`	`BIGTABLE_ACTIVE` Holds `true` if running under Google Application Engine BigTable; `false` if running under relational database.
`static java.lang.String`	`GAE_RUNTIME_PROPERTY` Holds name of the system property to identity Google Application Engine runtime environment.
`static java.lang.String`	`GAE_VERSION_PROPERTY` Holds name of the system property to identity Google Application Engine runtime version.

Fields inherited from class com.isomorphic.jpa.JPADataSource
additionalFields, AUTO_DERIVE_PROPERTY, BEAN_CLASS_PROPERTY, beanClass, beanName, configName, connectionHolder, em, ESCAPE_CHARACTER, generateRelatedUpdates, ID_CLASS_PROPERTY, idClass, JPA_CONFIG_PROPERTY, relatedUpdates, SCHEMA_BEAN_PROPERTY, shouldRollBackTransaction, strictSQLFiltering, tx, USE_QUALIFIED_CLASS_NAME_PROPERTY, useQualifiedClassName

Fields inherited from class com.isomorphic.datasource.DataSource
OP_ADD, OP_CLIENT_EXPORT, OP_CUSTOM, OP_DOWNLOAD_FILE, OP_FETCH, OP_GET_FILE, OP_GET_FILE_VERSION, OP_HAS_FILE, OP_HAS_FILE_VERSION, OP_LIST_FILE_VERSIONS, OP_LIST_FILES, OP_LOAD_SCHEMA, OP_REMOVE, OP_REMOVE_FILE, OP_REMOVE_FILE_VERSION, OP_RENAME_FILE, OP_SAVE_FILE, OP_UNIQUE_NAME, OP_UPDATE, OP_VALIDATE, OP_VIEW_FILE

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.util.Map`	`deriveDS(java.lang.String schemaBean, java.lang.String id, boolean extended)` Creates data source configuration from specified fully qualified class name.
`DSResponse`	`executeAdd(DSRequest req)` This method is called by DataSource.execute() for "add" operations.
`DSResponse`	`executeFetch(DSRequest req)` This method is called by DataSource.execute() for "fetch" operations.
`DSResponse`	`executeUpdate(DSRequest req)` This method is called by DataSource.execute() for "update" operations.

Methods inherited from class com.isomorphic.jpa.JPADataSource
escapeValueForFilter, execute, executeRemove, freeResources, getField, getFieldNames, getTransactionObjectKey, increaseOpCount, init, markTransactionForRollBack

Methods inherited from class com.isomorphic.datasource.BasicDataSource
getAuditDataSource, getListProperty, getMapProperty, getObjectProperty, getProperty, shouldAutoJoinTransaction, shouldAutoStartTransaction, transformMultipleFields, transformMultipleFields

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

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

- Field Detail
  - GAE_VERSION_PROPERTY
```
public static final java.lang.String GAE_VERSION_PROPERTY
```
    Holds name of the system property to identity Google Application Engine runtime version.
    
    See Also:
    
    Constant Field Values
  - GAE_RUNTIME_PROPERTY
```
public static final java.lang.String GAE_RUNTIME_PROPERTY
```
    Holds name of the system property to identity Google Application Engine runtime environment. Possible values are:
    - Production when running on App Engine
    - Development when running in the development server
    See Also:
    
    Constant Field Values
  - BIGTABLE_ACTIVE
```
public static final boolean BIGTABLE_ACTIVE
```
    Holds true if running under Google Application Engine BigTable; false if running under relational database.
- Method Detail
  - deriveDS
```
public java.util.Map deriveDS(java.lang.String schemaBean,
                              java.lang.String id,
                              boolean extended)
```
    Description copied from class: JPADataSource
    
    Creates data source configuration from specified fully qualified class name.
    
    Overrides:
    
    deriveDS in class JPADataSource
    
    Parameters:
    
    schemaBean - String Fully qualified class name.
    
    id - String Id for newly created data source.
    
    extended - boolean Extended properties will be captured if set to true.
    
    Returns:
    
    Map<String, Object> created data source configuration or null if it can not be created.
  - executeFetch
```
public DSResponse executeFetch(DSRequest req)
                        throws java.lang.Exception
```
    Description copied from class: DataSource
    
    This method is called by DataSource.execute() for "fetch" operations. It is the appropriate override point if you wish to provide custom handling of a "fetch".
    
    Overrides:
    
    executeFetch in class JPADataSource
    
    Parameters:
    
    req - The DSRequest object representing this operation
    
    Returns:
    
    A valid DSResponse
    
    Throws:
    
    java.lang.Exception
  - executeAdd
```
public DSResponse executeAdd(DSRequest req)
                      throws java.lang.Exception
```
    Description copied from class: DataSource
    
    This method is called by DataSource.execute() for "add" operations. It is the appropriate override point if you wish to provide custom handling of an "add".
    
    Overrides:
    
    executeAdd in class JPADataSource
    
    Parameters:
    
    req - The DSRequest object representing this operation
    
    Returns:
    
    A valid DSResponse
    
    Throws:
    
    java.lang.Exception
  - executeUpdate
```
public DSResponse executeUpdate(DSRequest req)
                         throws java.lang.Exception
```
    Description copied from class: DataSource
    
    This method is called by DataSource.execute() for "update" operations. It is the appropriate override point if you wish to provide custom handling of an "update".
    
    Overrides:
    
    executeUpdate in class JPADataSource
    
    Parameters:
    
    req - The DSRequest object representing this operation
    
    Returns:
    
    A valid DSResponse
    
    Throws:
    
    java.lang.Exception

Class GAEJPADataSource

Field Summary

Fields inherited from class com.isomorphic.jpa.JPADataSource

Fields inherited from class com.isomorphic.datasource.DataSource

Method Summary

Methods inherited from class com.isomorphic.jpa.JPADataSource

Methods inherited from class com.isomorphic.datasource.BasicDataSource

Methods inherited from class com.isomorphic.datasource.DataSource

Methods inherited from interface com.isomorphic.js.IToJSON

Field Detail

GAE_VERSION_PROPERTY

GAE_RUNTIME_PROPERTY

BIGTABLE_ACTIVE

Method Detail

deriveDS

executeFetch

executeAdd

executeUpdate