IsmFormat.KeyPrefix (google-cloud-dataflow-java 2.68.0 API)

java.lang.Object
- org.apache.beam.runners.dataflow.internal.IsmFormat.KeyPrefix

Enclosing class:

IsmFormat
```
public abstract static class IsmFormat.KeyPrefix
extends java.lang.Object
```
The prefix used before each key which contains the number of shared and unshared bytes from the previous key that was read. The key prefix along with the previous key and the unshared key bytes allows one to construct the current key by doing the following currentKey = previousKey[0 : sharedBytes] + read(unsharedBytes).
The key prefix is encoded as:
- number of shared key bytes (variable length integer coding)
- number of unshared key bytes (variable length integer coding)

Constructor Summary

Constructors
Constructor Description

KeyPrefix()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract int`	`getSharedKeySize()`
`abstract int`	`getUnsharedKeySize()`
`static IsmFormat.KeyPrefix`	`of(int sharedKeySize, int unsharedKeySize)`

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

Constructor Detail
- KeyPrefix
```
public KeyPrefix()
```

Method Detail

getSharedKeySize

public abstract int getSharedKeySize()

getUnsharedKeySize

public abstract int getUnsharedKeySize()

of

public static IsmFormat.KeyPrefix of(int sharedKeySize,
                                     int unsharedKeySize)