Package org.apache.druid.segment.nested

Class NestedDataColumnSupplier

java.lang.Object

org.apache.druid.segment.nested.NestedDataColumnSupplier

All Implemented Interfaces:

com.google.common.base.Supplier<NestedCommonFormatColumn>, Supplier<NestedCommonFormatColumn>, ColumnIndexSupplier

public class NestedDataColumnSupplier
extends Object
implements com.google.common.base.Supplier<NestedCommonFormatColumn>, ColumnIndexSupplier

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NestedDataColumnSupplier.FieldsFixupIndexed	Indexed implementation which contains a map of positions to replace with corrected values by getAndFixFieldsSupplier(ByteBuffer, ByteOrder, SegmentFileMapper).

Method Summary

Modifier and Type	Method	Description
<T> T	as(Class<T> clazz)	Try to get a column 'index' of the specified type.
NestedCommonFormatColumn	get()
ColumnType	getLogicalType()
static NestedDataColumnSupplier	read(ColumnType logicalType, boolean hasNulls, byte pathParserVersion, ByteBuffer bb, ColumnBuilder columnBuilder, ColumnConfig columnConfig, NestedCommonFormatColumnFormatSpec formatSpec, ByteOrder byteOrder, NestedDataColumnSupplier parent)

Methods inherited from class java.lang.Object

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

Method Details

read

public static NestedDataColumnSupplier read(ColumnType logicalType,
 boolean hasNulls,
 byte pathParserVersion,
 ByteBuffer bb,
 ColumnBuilder columnBuilder,
 ColumnConfig columnConfig,
 NestedCommonFormatColumnFormatSpec formatSpec,
 ByteOrder byteOrder,
 NestedDataColumnSupplier parent)

get

public NestedCommonFormatColumn get()

Specified by:

get in interface com.google.common.base.Supplier<NestedCommonFormatColumn>

Specified by:

get in interface Supplier<NestedCommonFormatColumn>

getLogicalType

public ColumnType getLogicalType()

as

@Nullable
public <T> T as(Class<T> clazz)

Description copied from interface: ColumnIndexSupplier

Try to get a column 'index' of the specified type. If the index of the desired type is not available, this method will return null. If the value is non-null, the index may be used for the eventual construction of an Offset to form the basis of a Cursor (or VectorOffset and VectorCursor) which can greatly reduce the total number of rows which need to be scanned and processed. Objects returned by this method are not thread-safe. There are several built-in index classes which can be passed as an argument to this method when used from Filter.getBitmapColumnIndex(ColumnIndexSelector). Implementors of this interface should provide as many of them as possible to participate fully in as many Filter as possible, as different filters require different index types, and may prefer some over others. Indexes for matching a row to a specific value:

Specified by:

as in interface ColumnIndexSupplier

See Also:

• NullValueIndex
• Indexes for matching a row to any of a set of values:
• ValueSetIndexes
• Indexes for matching a row to a range of values:
• LexicographicalRangeIndexes
• Indexes for matching an array element of a row to a specific value:
• Indexes for matching a row using a org.apache.druid.query.filter.DruidPredicateFactory:
• Speciality indexes:
• Low level access to implementation specific index stuff not particularly suitable for use in filtering:
• DictionaryEncodedValueIndex
• DictionaryEncodedStringValueIndex