AbstractVariableWidthBlock (presto-spi 0.94 API)

java.lang.Object
- com.facebook.presto.spi.block.AbstractVariableWidthBlock

All Implemented Interfaces:

Block

Direct Known Subclasses:

LazySliceArrayBlock, SliceArrayBlock, VariableWidthBlock, VariableWidthBlockBuilder
```
public abstract class AbstractVariableWidthBlock
extends Object
implements Block
```

Constructor Summary

Constructors
Constructor and Description

AbstractVariableWidthBlock()

Constructors
Constructor and Description
`AbstractVariableWidthBlock()`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`assureLoaded()` Assures that all data for the block is in memory.
`int`	`bytesCompare(int position, int offset, int length, io.airlift.slice.Slice otherSlice, int otherOffset, int otherLength)` Compares the byte sequences at `offset` in the value at `position` to the byte sequence at `otherOffset` in `otherSlice`.
`boolean`	`bytesEqual(int position, int offset, io.airlift.slice.Slice otherSlice, int otherOffset, int length)` Is the byte sequences at `offset` in the value at `position` equal to the byte sequence at `otherOffset` in `otherSlice`.
`int`	`compareTo(int position, int offset, int length, Block otherBlock, int otherPosition, int otherOffset, int otherLength)` Compares the byte sequences at `offset` in the value at `position` to the byte sequence at `otherOffset` in the value at `otherPosition` in `otherBlock`.
`boolean`	`equals(int position, int offset, Block otherBlock, int otherPosition, int otherOffset, int length)` Is the byte sequences at `offset` in the value at `position` equal to the byte sequence at `otherOffset` in the value at `otherPosition` in `otherBlock`.
`byte`	`getByte(int position, int offset)` Gets a byte at `offset` in the value at `position`.
`double`	`getDouble(int position, int offset)` Gets a little endian double at `offset` in the value at `position`.
`BlockEncoding`	`getEncoding()` Get the encoding for this block.
`float`	`getFloat(int position, int offset)` Gets a little endian float at `offset` in the value at `position`.
`int`	`getInt(int position, int offset)` Gets a little endian int at `offset` in the value at `position`.
`long`	`getLong(int position, int offset)` Gets a little endian long at `offset` in the value at `position`.
`protected abstract int`	`getPositionOffset(int position)`
`protected abstract io.airlift.slice.Slice`	`getRawSlice(int position)`
`short`	`getShort(int position, int offset)` Gets a little endian short at `offset` in the value at `position`.
`Block`	`getSingleValueBlock(int position)` Gets the value at the specified position as a single element block.
`io.airlift.slice.Slice`	`getSlice(int position, int offset, int length)` Gets a slice at `offset` in the value at `position`.
`int`	`hash(int position, int offset, int length)` Calculates the hash code the byte sequences at `offset` in the value at `position`.
`protected abstract boolean`	`isEntryNull(int position)`
`boolean`	`isNull(int position)` Is the specified position null?
`void`	`writeBytesTo(int position, int offset, int length, BlockBuilder blockBuilder)` Appends the byte sequences at `offset` in the value at `position` to `blockBuilder`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.facebook.presto.spi.block.Block
getLength, getPositionCount, getRegion, getSizeInBytes

- Constructor Detail
  - AbstractVariableWidthBlock
```
public AbstractVariableWidthBlock()
```
- Method Detail
  - getRawSlice
```
protected abstract io.airlift.slice.Slice getRawSlice(int position)
```
  - getPositionOffset
```
protected abstract int getPositionOffset(int position)
```
  - isEntryNull
```
protected abstract boolean isEntryNull(int position)
```
  - getEncoding
```
public BlockEncoding getEncoding()
```
    Description copied from interface: Block
    
    Get the encoding for this block.
    
    Specified by:
    
    getEncoding in interface Block
  - getByte
```
public byte getByte(int position,
                    int offset)
```
    Description copied from interface: Block
    
    Gets a byte at offset in the value at position.
    
    Specified by:
    
    getByte in interface Block
  - getShort
```
public short getShort(int position,
                      int offset)
```
    Description copied from interface: Block
    
    Gets a little endian short at offset in the value at position.
    
    Specified by:
    
    getShort in interface Block
  - getInt
```
public int getInt(int position,
                  int offset)
```
    Description copied from interface: Block
    
    Gets a little endian int at offset in the value at position.
    
    Specified by:
    
    getInt in interface Block
  - getLong
```
public long getLong(int position,
                    int offset)
```
    Description copied from interface: Block
    
    Gets a little endian long at offset in the value at position.
    
    Specified by:
    
    getLong in interface Block
  - getFloat
```
public float getFloat(int position,
                      int offset)
```
    Description copied from interface: Block
    
    Gets a little endian float at offset in the value at position.
    
    Specified by:
    
    getFloat in interface Block
  - getDouble
```
public double getDouble(int position,
                        int offset)
```
    Description copied from interface: Block
    
    Gets a little endian double at offset in the value at position.
    
    Specified by:
    
    getDouble in interface Block
  - getSlice
```
public io.airlift.slice.Slice getSlice(int position,
                                       int offset,
                                       int length)
```
    Description copied from interface: Block
    
    Gets a slice at offset in the value at position.
    
    Specified by:
    
    getSlice in interface Block
  - equals
```
public boolean equals(int position,
                      int offset,
                      Block otherBlock,
                      int otherPosition,
                      int otherOffset,
                      int length)
```
    Description copied from interface: Block
    
    Is the byte sequences at offset in the value at position equal to the byte sequence at otherOffset in the value at otherPosition in otherBlock.
    
    Specified by:
    
    equals in interface Block
  - bytesEqual
```
public boolean bytesEqual(int position,
                          int offset,
                          io.airlift.slice.Slice otherSlice,
                          int otherOffset,
                          int length)
```
    Description copied from interface: Block
    
    Is the byte sequences at offset in the value at position equal to the byte sequence at otherOffset in otherSlice.
    
    Specified by:
    
    bytesEqual in interface Block
  - hash
```
public int hash(int position,
                int offset,
                int length)
```
    Description copied from interface: Block
    
    Calculates the hash code the byte sequences at offset in the value at position.
    
    Specified by:
    
    hash in interface Block
  - compareTo
```
public int compareTo(int position,
                     int offset,
                     int length,
                     Block otherBlock,
                     int otherPosition,
                     int otherOffset,
                     int otherLength)
```
    Description copied from interface: Block
    
    Compares the byte sequences at offset in the value at position to the byte sequence at otherOffset in the value at otherPosition in otherBlock.
    
    Specified by:
    
    compareTo in interface Block
  - bytesCompare
```
public int bytesCompare(int position,
                        int offset,
                        int length,
                        io.airlift.slice.Slice otherSlice,
                        int otherOffset,
                        int otherLength)
```
    Description copied from interface: Block
    
    Compares the byte sequences at offset in the value at position to the byte sequence at otherOffset in otherSlice.
    
    Specified by:
    
    bytesCompare in interface Block
  - writeBytesTo
```
public void writeBytesTo(int position,
                         int offset,
                         int length,
                         BlockBuilder blockBuilder)
```
    Description copied from interface: Block
    
    Appends the byte sequences at offset in the value at position to blockBuilder.
    
    Specified by:
    
    writeBytesTo in interface Block
  - getSingleValueBlock
```
public Block getSingleValueBlock(int position)
```
    Description copied from interface: Block
    
    Gets the value at the specified position as a single element block. The method must copy the data into a new block. This method is useful for operators that hold on to a single value without holding on to the entire block.
    
    Specified by:
    
    getSingleValueBlock in interface Block
  - isNull
```
public boolean isNull(int position)
```
    Description copied from interface: Block
    
    Is the specified position null?
    
    Specified by:
    
    isNull in interface Block
  - assureLoaded
```
public void assureLoaded()
```
    Description copied from interface: Block
    
    Assures that all data for the block is in memory. This allows streaming data sources to skip sections that are not accessed in a query.
    
    Specified by:
    
    assureLoaded in interface Block

Class AbstractVariableWidthBlock

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface com.facebook.presto.spi.block.Block

Constructor Detail

AbstractVariableWidthBlock

Method Detail

getRawSlice

getPositionOffset

isEntryNull

getEncoding

getByte

getShort

getInt

getLong

getFloat

getDouble

getSlice

equals

bytesEqual

hash

compareTo

bytesCompare

writeBytesTo

getSingleValueBlock

isNull

assureLoaded