org.apache.metamodel.pojo

Class PojoDataContext

java.lang.Object

org.apache.metamodel.AbstractDataContext

org.apache.metamodel.QueryPostprocessDataContext

org.apache.metamodel.pojo.PojoDataContext

All Implemented Interfaces:

Serializable, HasReadTypeConverters, DataContext, UpdateableDataContext

public class PojoDataContext
extends QueryPostprocessDataContext
implements UpdateableDataContext, Serializable

A DataContext used to serve MetaModel support for collections of Java objects and key/value maps.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_SCHEMA_NAME

Fields inherited from class org.apache.metamodel.QueryPostprocessDataContext

INFORMATION_SCHEMA_NAME, SYSTEM_PROPERTY_CREATE_DEFAULT_TABLE_ALIAS

Constructor Summary

Constructors

Constructor and Description
PojoDataContext() Creates a new POJO data context that is empty but can be populated at will.
PojoDataContext(List<TableDataProvider<?>> tables) Creates a new POJO data context based on the provided TableDataProviders.
PojoDataContext(String schemaName, List<TableDataProvider<?>> tables) Creates a new POJO data context based on the provided TableDataProviders.
PojoDataContext(String schemaName, TableDataProvider... tableProviders) Creates a new POJO data context based on the provided TableDataProviders.

Method Summary

Modifier and Type	Method and Description
protected void	addTableDataProvider(TableDataProvider<?> tableDataProvider)
UpdateSummary	executeUpdate(UpdateScript update) Submits an UpdateScript for execution on the DataContext.
protected Schema	getMainSchema()
protected String	getMainSchemaName()
void	insert(String tableName, Map<String,Object> recordData)
protected DataSet	materializeMainSchemaTable(Table table, List<Column> columns, int maxRows) Executes a simple one-table query against a table in the main schema of the subclasses of this class.

Methods inherited from class org.apache.metamodel.QueryPostprocessDataContext

addConverter, executeCountQuery, executePrimaryKeyLookupQuery, executeQuery, getDefaultSchemaName, getSchemaByNameInternal, getSchemaNamesInternal, isMainSchemaTable, isScalarFunctionMaterialized, materializeFromItem, materializeMainSchemaTable, materializeMainSchemaTable, materializeMainSchemaTableSelect, materializeTable

Methods inherited from class org.apache.metamodel.AbstractDataContext

compileQuery, executeQuery, executeQuery, getColumnByQualifiedLabel, getDefaultSchema, getSchemaByName, getSchemaNames, getSchemas, getTableByQualifiedLabel, isQualifiedPathDelim, onSchemaCacheRefreshed, parseQuery, query, refreshSchemas

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.metamodel.DataContext

compileQuery, executeQuery, executeQuery, executeQuery, getColumnByQualifiedLabel, getDefaultSchema, getSchemaByName, getSchemaNames, getSchemas, getTableByQualifiedLabel, parseQuery, query, refreshSchemas

Field Detail

DEFAULT_SCHEMA_NAME

public static final String DEFAULT_SCHEMA_NAME

See Also:

Constant Field Values

Constructor Detail

PojoDataContext

public PojoDataContext()

Creates a new POJO data context that is empty but can be populated at will.

PojoDataContext

public PojoDataContext(List<TableDataProvider<?>> tables)

Creates a new POJO data context based on the provided TableDataProviders.

Parameters:

tables -

PojoDataContext

public PojoDataContext(String schemaName,
                       TableDataProvider... tableProviders)

Creates a new POJO data context based on the provided TableDataProviders.

Parameters:

schemaName - the name of the created schema

tableProviders -

PojoDataContext

public PojoDataContext(String schemaName,
                       List<TableDataProvider<?>> tables)

Creates a new POJO data context based on the provided TableDataProviders.

Parameters:

schemaName - the name of the created schema

tables -

Method Detail

materializeMainSchemaTable

protected DataSet materializeMainSchemaTable(Table table,
                                             List<Column> columns,
                                             int maxRows)

Description copied from class: QueryPostprocessDataContext

Executes a simple one-table query against a table in the main schema of the subclasses of this class.

Specified by:

materializeMainSchemaTable in class QueryPostprocessDataContext

Parameters:

table - the table to query

columns - the columns of the table to query

maxRows - the maximum amount of rows needed or -1 if all rows are wanted.

Returns:

a dataset with the raw table/column content.

getMainSchema

protected Schema getMainSchema()
                        throws MetaModelException

Specified by:

getMainSchema in class QueryPostprocessDataContext

Returns:

the main schema that subclasses of this class produce

Throws:

MetaModelException

getMainSchemaName

protected String getMainSchemaName()
                            throws MetaModelException

Specified by:

getMainSchemaName in class QueryPostprocessDataContext

Returns:

the name of the main schema that subclasses of this class produce

Throws:

MetaModelException

executeUpdate

public UpdateSummary executeUpdate(UpdateScript update)

Description copied from interface: UpdateableDataContext

Submits an UpdateScript for execution on the DataContext. Since implementations of the DataContext vary quite a lot, there is no golden rule as to how an update script will be executed. But the implementors should strive towards handling an UpdateScript as a single transactional change to the data store.

Specified by:

executeUpdate in interface UpdateableDataContext

Parameters:

update - the update script to execute

Returns:

a summary of the updates performed

addTableDataProvider

protected void addTableDataProvider(TableDataProvider<?> tableDataProvider)

insert

public void insert(String tableName,
                   Map<String,Object> recordData)