CompressionStrategy (io.druid:druid 0.12.0 API)

java.lang.Object
- java.lang.Enum<CompressionStrategy>
- - io.druid.segment.data.CompressionStrategy

All Implemented Interfaces:

Serializable, Comparable<CompressionStrategy>
```
public enum CompressionStrategy
extends Enum<CompressionStrategy>
```
Compression strategy is used to compress block of bytes without knowledge of what data the bytes represents. When adding compression strategy, do not use id in the range [0x7C, 0xFD] (greater than 123 or less than -2), since a flag mechanism is used in CompressionFactory that involves subtracting the value 126 from the compression id (see CompressionFactory.FLAG_BOUND)

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`CompressionStrategy.Compressor`
`static interface`	`CompressionStrategy.Decompressor`
`static class`	`CompressionStrategy.LZ4Compressor`
`static class`	`CompressionStrategy.LZ4Decompressor`
`static class`	`CompressionStrategy.LZFCompressor`
`static class`	`CompressionStrategy.LZFDecompressor`
`static class`	`CompressionStrategy.UncompressedCompressor`
`static class`	`CompressionStrategy.UncompressedDecompressor`

Enum Constant Summary

Enum Constants
Enum Constant and Description

LZ4

LZF

NONE
This value indicate no compression strategy should be used, and compression should not be block based.

UNCOMPRESSED

Enum Constants
Enum Constant and Description
`LZ4`
`LZF`
`NONE` This value indicate no compression strategy should be used, and compression should not be block based.
`UNCOMPRESSED`

Field Summary

Fields
Modifier and Type Field and Description

static CompressionStrategy DEFAULT_COMPRESSION_STRATEGY

Fields
Modifier and Type	Field and Description
`static CompressionStrategy`	`DEFAULT_COMPRESSION_STRATEGY`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`static CompressionStrategy`	`forId(byte id)`
`static CompressionStrategy`	`fromString(String name)`
`abstract CompressionStrategy.Compressor`	`getCompressor()`
`abstract CompressionStrategy.Decompressor`	`getDecompressor()`
`byte`	`getId()`
`static CompressionStrategy[]`	`noNoneValues()`
`String`	`toString()`
`static CompressionStrategy`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static CompressionStrategy[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - LZF
```
public static final CompressionStrategy LZF
```
  - LZ4
```
public static final CompressionStrategy LZ4
```
  - UNCOMPRESSED
```
public static final CompressionStrategy UNCOMPRESSED
```
  - NONE
```
public static final CompressionStrategy NONE
```
    This value indicate no compression strategy should be used, and compression should not be block based. ColumnarLongs, ColumnarFloats and ColumnarDoubles support non block based compression, and other types treat this as UNCOMPRESSED.
- Field Detail
  - DEFAULT_COMPRESSION_STRATEGY
```
public static final CompressionStrategy DEFAULT_COMPRESSION_STRATEGY
```
- Method Detail
  - values
```
public static CompressionStrategy[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (CompressionStrategy c : CompressionStrategy.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static CompressionStrategy valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - getId
```
public byte getId()
```
  - getCompressor
```
public abstract CompressionStrategy.Compressor getCompressor()
```
  - getDecompressor
```
public abstract CompressionStrategy.Decompressor getDecompressor()
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Enum<CompressionStrategy>
  - fromString
```
public static CompressionStrategy fromString(String name)
```
  - forId
```
public static CompressionStrategy forId(byte id)
```
  - noNoneValues
```
public static CompressionStrategy[] noNoneValues()
```

Enum CompressionStrategy

Nested Class Summary

Enum Constant Summary

Field Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

LZF

LZ4

UNCOMPRESSED

NONE

Field Detail

DEFAULT_COMPRESSION_STRATEGY

Method Detail

values

valueOf

getId

getCompressor

getDecompressor

toString

fromString

forId

noNoneValues