org.apache.drill.metastore.components.tables

Class TableMetadataUnit.Schema

java.lang.Object

org.apache.drill.metastore.components.tables.TableMetadataUnit.Schema

Enclosing class:

TableMetadataUnit

public static class TableMetadataUnit.Schema
extends Object

Contains schema metadata, including lists of columns which belong to table, segment, file, row group or partition. Also provides unit class getters and its builder setters method handlers to optimize reflection calls.

Method Summary

Modifier and Type	Method and Description
List<MetastoreColumn>	fileColumns()
static TableMetadataUnit.Schema	of(Class<?> unitClass, Class<?> builderClass) Obtains field information for the given unit class and its builder.
List<MetastoreColumn>	partitionColumns()
List<MetastoreColumn>	rowGroupColumns()
List<MetastoreColumn>	segmentColumns()
List<MetastoreColumn>	tableColumns()
Map<String,MethodHandle>	unitBuilderSetters()
Map<String,MethodHandle>	unitGetters()

Methods inherited from class java.lang.Object

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

Method Detail

of

public static TableMetadataUnit.Schema of(Class<?> unitClass,
                                          Class<?> builderClass)

Obtains field information for the given unit class and its builder. Traverses through the list of unit class fields which are annotated with MetastoreFieldDefinition and creates instance of TableMetadataUnit.Schema class that holds unit class schema metadata. Assumes that given unit class and its builder getters and setters method names are the same as annotated fields names.

tableColumns

public List<MetastoreColumn> tableColumns()

segmentColumns

public List<MetastoreColumn> segmentColumns()

fileColumns

public List<MetastoreColumn> fileColumns()

rowGroupColumns

public List<MetastoreColumn> rowGroupColumns()

partitionColumns

public List<MetastoreColumn> partitionColumns()

unitGetters

public Map<String,MethodHandle> unitGetters()

unitBuilderSetters

public Map<String,MethodHandle> unitBuilderSetters()