com.yahoo.bard.webservice.table

Interface Schema

All Known Implementing Classes:

BaseSchema, LogicalTableSchema, PhysicalTableSchema, ResultSetSchema, ZonedSchema

public interface Schema

An interface describing a table or table-like entity composed of sets of columns.

Method Summary

Modifier and Type	Method and Description
default <T extends Column> Optional<T>	getColumn(String name, Class<T> columnClass) Given a column type and name, return the column of the expected type.
Set<Column>	getColumns() Get all the columns underlying this Schema.
default <T extends Column> LinkedHashSet<T>	getColumns(Class<T> columnClass) Getter for set of columns by sub-type.
Granularity	getGranularity() Get the time granularity for this Schema.

Method Detail

getColumns

Set<Column> getColumns()

Get all the columns underlying this Schema.

Returns:

The columns of this schema

getGranularity

Granularity getGranularity()

Get the time granularity for this Schema.

Returns:

The time granularity of this schema

getColumns

default <T extends Column> LinkedHashSet<T> getColumns(Class<T> columnClass)

Getter for set of columns by sub-type.

Type Parameters:

T - sub-type of Column to return

Parameters:

columnClass - The class of columns to to search

Returns:

Set of Columns

getColumn

default <T extends Column> Optional<T> getColumn(String name,
                                                 Class<T> columnClass)

Given a column type and name, return the column of the expected type.

Type Parameters:

T - The type of the subclass of the column being retrieved

Parameters:

name - The name on the column

columnClass - The class of the column being retrieved

Returns:

The an optional containing the column of the name and type specified, if any