org.apache.metamodel.hbase

Class HBaseDataContext

java.lang.Object

org.apache.metamodel.AbstractDataContext

org.apache.metamodel.QueryPostprocessDataContext

org.apache.metamodel.hbase.HBaseDataContext

All Implemented Interfaces:

org.apache.metamodel.convert.HasReadTypeConverters, org.apache.metamodel.DataContext

public class HBaseDataContext
extends org.apache.metamodel.QueryPostprocessDataContext

MetaModel adaptor for Apache HBase.

Field Summary

Fields

Modifier and Type	Field and Description
static String	FIELD_ID

Fields inherited from class org.apache.metamodel.QueryPostprocessDataContext

INFORMATION_SCHEMA_NAME, SYSTEM_PROPERTY_CREATE_DEFAULT_TABLE_ALIAS

Constructor Summary

Constructors

Constructor and Description
HBaseDataContext(HBaseConfiguration configuration) Creates a HBaseDataContext.
HBaseDataContext(HBaseConfiguration configuration, org.apache.hadoop.hbase.client.Connection connection) Creates a HBaseDataContext.

Method Summary

Modifier and Type	Method and Description
protected Number	executeCountQuery(org.apache.metamodel.schema.Table table, List<org.apache.metamodel.query.FilterItem> whereItems, boolean functionApproximationAllowed)
protected org.apache.metamodel.data.Row	executePrimaryKeyLookupQuery(org.apache.metamodel.schema.Table table, List<org.apache.metamodel.query.SelectItem> selectItems, org.apache.metamodel.schema.Column primaryKeyColumn, Object keyValue)
org.apache.hadoop.hbase.client.Admin	getAdmin() Gets the Admin used by this DataContext
HBaseConfiguration	getConfiguration() Gets the HBaseConfiguration that is used in this datacontext.
org.apache.hadoop.hbase.client.Connection	getConnection()
protected org.apache.hadoop.hbase.client.Table	getHTable(String name)
protected org.apache.metamodel.schema.Schema	getMainSchema()
protected String	getMainSchemaName()
protected org.apache.metamodel.data.DataSet	materializeMainSchemaTable(org.apache.metamodel.schema.Table table, List<org.apache.metamodel.schema.Column> columns, int maxRows)

Methods inherited from class org.apache.metamodel.QueryPostprocessDataContext

addConverter, 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

Field Detail

FIELD_ID

public static final String FIELD_ID

See Also:

Constant Field Values

Constructor Detail

HBaseDataContext

public HBaseDataContext(HBaseConfiguration configuration)

Creates a HBaseDataContext.

Parameters:

configuration -

HBaseDataContext

public HBaseDataContext(HBaseConfiguration configuration,
                        org.apache.hadoop.hbase.client.Connection connection)

Creates a HBaseDataContext.

Parameters:

configuration -

connection -

Method Detail

getAdmin

public org.apache.hadoop.hbase.client.Admin getAdmin()

Gets the Admin used by this DataContext

Returns:

getConnection

public org.apache.hadoop.hbase.client.Connection getConnection()

getMainSchema

protected org.apache.metamodel.schema.Schema getMainSchema()
                                                    throws org.apache.metamodel.MetaModelException

Specified by:

getMainSchema in class org.apache.metamodel.QueryPostprocessDataContext

Throws:

org.apache.metamodel.MetaModelException

getConfiguration

public HBaseConfiguration getConfiguration()

Gets the HBaseConfiguration that is used in this datacontext.

Returns:

getMainSchemaName

protected String getMainSchemaName()
                            throws org.apache.metamodel.MetaModelException

Specified by:

getMainSchemaName in class org.apache.metamodel.QueryPostprocessDataContext

Throws:

org.apache.metamodel.MetaModelException

executeCountQuery

protected Number executeCountQuery(org.apache.metamodel.schema.Table table,
                                   List<org.apache.metamodel.query.FilterItem> whereItems,
                                   boolean functionApproximationAllowed)

Overrides:

executeCountQuery in class org.apache.metamodel.QueryPostprocessDataContext

getHTable

protected org.apache.hadoop.hbase.client.Table getHTable(String name)

executePrimaryKeyLookupQuery

protected org.apache.metamodel.data.Row executePrimaryKeyLookupQuery(org.apache.metamodel.schema.Table table,
                                                                     List<org.apache.metamodel.query.SelectItem> selectItems,
                                                                     org.apache.metamodel.schema.Column primaryKeyColumn,
                                                                     Object keyValue)

Overrides:

executePrimaryKeyLookupQuery in class org.apache.metamodel.QueryPostprocessDataContext

materializeMainSchemaTable

protected org.apache.metamodel.data.DataSet materializeMainSchemaTable(org.apache.metamodel.schema.Table table,
                                                                       List<org.apache.metamodel.schema.Column> columns,
                                                                       int maxRows)

Specified by:

materializeMainSchemaTable in class org.apache.metamodel.QueryPostprocessDataContext