com.facebook.presto.common.type

Class MapType

java.lang.Object

com.facebook.presto.common.type.AbstractType

com.facebook.presto.common.type.MapType

All Implemented Interfaces:

Type

public class MapType
extends AbstractType

Constructor Summary

Constructors

Constructor and Description
MapType(Type keyType, Type valueType, MethodHandle keyBlockEquals, MethodHandle keyBlockHashCode)

Method Summary

Modifier and Type	Method and Description
void	appendTo(Block block, int position, BlockBuilder blockBuilder) Append the value at position in block to blockBuilder.
BlockBuilder	createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries) Creates the preferred block builder for this type.
BlockBuilder	createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries, int expectedBytesPerEntry) Creates the preferred block builder for this type.
Block	createBlockFromKeyValue(int positionCount, Optional<boolean[]> mapIsNull, int[] offsets, Block keyBlock, Block valueBlock)
static Block	createMapBlockInternal(int startOffset, int positionCount, Optional<boolean[]> mapIsNull, int[] offsets, Block keyBlock, Block valueBlock, AbstractMapBlock.HashTables hashTables) Create a map block directly without per element validations.
boolean	equalTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition) Are the values in the specified blocks at the specified positions equal?
Block	getBlockUnchecked(Block block, int internalPosition) Gets the value at the block internalPosition - offsetBase as a block without boundary checks.
String	getDisplayName() Returns the name of this type that should be displayed to end-users.
MethodHandle	getKeyBlockEquals()
MethodHandle	getKeyBlockHashCode()
Type	getKeyType()
Block	getObject(Block block, int position) Gets the value at the block position as an Object.
Object	getObjectValue(SqlFunctionProperties properties, Block block, int position) Gets an object representation of the type value in the block position.
List<Type>	getTypeParameters() For parameterized types returns the list of parameters.
TypeSignature	getTypeSignature() Gets the name of this type which must be case insensitive globally unique.
Type	getValueType()
long	hash(Block block, int position) Calculates the hash code of the value at the specified position in the specified block.
boolean	isComparable() True if the type supports equalTo and hash.
void	writeObject(BlockBuilder blockBuilder, Object value) Writes the Object value into the BlockBuilder.

Methods inherited from class com.facebook.presto.common.type.AbstractType

compareTo, equals, getBoolean, getBooleanUnchecked, getDouble, getDoubleUnchecked, getJavaType, getLong, getLongUnchecked, getSlice, getSliceUnchecked, hashCode, isOrderable, toString, writeBoolean, writeDouble, writeLong, writeSlice, writeSlice

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MapType

public MapType(Type keyType,
               Type valueType,
               MethodHandle keyBlockEquals,
               MethodHandle keyBlockHashCode)

Method Detail

getTypeSignature

public TypeSignature getTypeSignature()

Description copied from interface: Type

Gets the name of this type which must be case insensitive globally unique. The name of a user defined type must be a legal identifier in Presto.

createBlockBuilder

public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus,
                                       int expectedEntries,
                                       int expectedBytesPerEntry)

Description copied from interface: Type

Creates the preferred block builder for this type. This is the builder used to store values after an expression projection within the query.

createBlockBuilder

public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus,
                                       int expectedEntries)

Description copied from interface: Type

Creates the preferred block builder for this type. This is the builder used to store values after an expression projection within the query.

getKeyType

public Type getKeyType()

getValueType

public Type getValueType()

isComparable

public boolean isComparable()

Description copied from interface: Type

True if the type supports equalTo and hash.

Specified by:

isComparable in interface Type

Overrides:

isComparable in class AbstractType

getKeyBlockEquals

public MethodHandle getKeyBlockEquals()

getKeyBlockHashCode

public MethodHandle getKeyBlockHashCode()

hash

public long hash(Block block,
                 int position)

Description copied from interface: Type

Calculates the hash code of the value at the specified position in the specified block.

Specified by:

hash in interface Type

Overrides:

hash in class AbstractType

equalTo

public boolean equalTo(Block leftBlock,
                       int leftPosition,
                       Block rightBlock,
                       int rightPosition)

Description copied from interface: Type

Are the values in the specified blocks at the specified positions equal?

This method assumes input is not null.

Specified by:

equalTo in interface Type

Overrides:

equalTo in class AbstractType

getObjectValue

public Object getObjectValue(SqlFunctionProperties properties,
                             Block block,
                             int position)

Description copied from interface: Type

Gets an object representation of the type value in the block position. This is the value returned to the user via the REST endpoint and therefore must be JSON serializable.

appendTo

public void appendTo(Block block,
                     int position,
                     BlockBuilder blockBuilder)

Description copied from interface: Type

Append the value at position in block to blockBuilder.

getObject

public Block getObject(Block block,
                       int position)

Description copied from interface: Type

Gets the value at the block position as an Object.

Specified by:

getObject in interface Type

Overrides:

getObject in class AbstractType

getBlockUnchecked

public Block getBlockUnchecked(Block block,
                               int internalPosition)

Description copied from interface: Type

Gets the value at the block internalPosition - offsetBase as a block without boundary checks.

Specified by:

getBlockUnchecked in interface Type

Overrides:

getBlockUnchecked in class AbstractType

writeObject

public void writeObject(BlockBuilder blockBuilder,
                        Object value)

Description copied from interface: Type

Writes the Object value into the BlockBuilder.

Specified by:

writeObject in interface Type

Overrides:

writeObject in class AbstractType

getTypeParameters

public List<Type> getTypeParameters()

Description copied from interface: Type

For parameterized types returns the list of parameters.

Specified by:

getTypeParameters in interface Type

Overrides:

getTypeParameters in class AbstractType

getDisplayName

public String getDisplayName()

Description copied from interface: Type

Returns the name of this type that should be displayed to end-users.

Specified by:

getDisplayName in interface Type

Overrides:

getDisplayName in class AbstractType

createBlockFromKeyValue

public Block createBlockFromKeyValue(int positionCount,
                                     Optional<boolean[]> mapIsNull,
                                     int[] offsets,
                                     Block keyBlock,
                                     Block valueBlock)

createMapBlockInternal

public static Block createMapBlockInternal(int startOffset,
                                           int positionCount,
                                           Optional<boolean[]> mapIsNull,
                                           int[] offsets,
                                           Block keyBlock,
                                           Block valueBlock,
                                           AbstractMapBlock.HashTables hashTables)

Create a map block directly without per element validations.

Internal use by com.facebook.presto.spi.Block only.