Package io.deephaven.parquet.table.metadata

Class TableInfo

java.lang.Object

io.deephaven.parquet.table.metadata.TableInfo

@Immutable
public abstract class TableInfo
extends Object

Representation class for per-table information stored in key-value metadata for Deephaven-written Parquet files.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	TableInfo.Builder

Constructor Summary

Constructors

Constructor	Description
TableInfo()

Method Summary

Modifier and Type	Method	Description
static TableInfo.Builder	builder()
final Map<String,ColumnTypeInfo>	columnTypeMap()
abstract List<ColumnTypeInfo>	columnTypes()
abstract List<DataIndexInfo>	dataIndexes()
static TableInfo	deserializeFromJSON(@NotNull String tableInfoRaw)
final Map<String,GroupingColumnInfo>	groupingColumnMap()
abstract List<GroupingColumnInfo>	groupingColumns()
final String	serializeToJSON()
abstract List<SortColumnInfo>	sortingColumns()
String	version()

Methods inherited from class java.lang.Object

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

Constructor Details

TableInfo

public TableInfo()

Method Details

serializeToJSON

public final String serializeToJSON()
                             throws IOException

Throws:

IOException

deserializeFromJSON

public static TableInfo deserializeFromJSON(@NotNull
 @NotNull String tableInfoRaw)
                                     throws IOException

Throws:

IOException

groupingColumnMap

public final Map<String,GroupingColumnInfo> groupingColumnMap()

columnTypeMap

public final Map<String,ColumnTypeInfo> columnTypeMap()

version

@Default
public String version()

Returns:

The Deephaven release version used to write the parquet file

groupingColumns

public abstract List<GroupingColumnInfo> groupingColumns()

Returns:

List of grouping columns for columns with grouped data

dataIndexes

public abstract List<DataIndexInfo> dataIndexes()

Returns:

List of data indexes for this table

columnTypes

public abstract List<ColumnTypeInfo> columnTypes()

Returns:

List of column types for columns requiring non-default deserialization or type selection

sortingColumns

public abstract List<SortColumnInfo> sortingColumns()

Returns:

List of sort columns representing the sort order of the table. Note that these are ordered by precedence, representing a multi-column sort.

builder

public static TableInfo.Builder builder()