KeyedPCollectionTuple (Google Cloud Dataflow SDK 0.4.150602 API)

java.lang.Object
- com.google.cloud.dataflow.sdk.transforms.join.KeyedPCollectionTuple<K>

Type Parameters:
K - the type of key shared by all constituent PCollections

All Implemented Interfaces:

PInput
```
public class KeyedPCollectionTuple<K>
extends Object
implements PInput
```
An immutable tuple of keyed PCollections with key type K. (PCollections containing values of type KV<K, ?>)

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`KeyedPCollectionTuple.TaggedKeyedPCollection<K,V>` A utility class to help ensure coherence of tag and input PCollection types.

Method Summary

Methods
Modifier and Type	Method and Description
`<V> KeyedPCollectionTuple<K>`	`and(TupleTag<V> tag, PCollection<KV<K,V>> pc)` Returns a new `KeyedPCollectionTuple<K>` that is the same as this, appended with the given PCollection.
`<OutputT extends POutput> OutputT`	`apply(PTransform<KeyedPCollectionTuple<K>,OutputT> transform)` Applies the given `PTransform` to this input.
`static <K> KeyedPCollectionTuple<K>`	`empty(Pipeline pipeline)` Returns an empty `KeyedPCollectionTuple<K>` on the given pipeline.
`Collection<? extends PValue>`	`expand()` Expands the component `PCollections`, stripping off any tag-specific information.
`void`	`finishSpecifying()` After building, finalizes this `PInput` to make it ready for being used as an input to a `PTransform`.
`CoGbkResultSchema`	`getCoGbkResultSchema()` Returns the `CoGbkResultSchema` associated with this `KeyedPCollectionTuple`.
`Coder<K>`	`getKeyCoder()` Returns the key `Coder` for all `PCollections` in this `KeyedPCollectionTuple`.
`List<KeyedPCollectionTuple.TaggedKeyedPCollection<K,?>>`	`getKeyedCollections()` Returns a list of `TaggedKeyedPCollections` for the `PCollections` contained in this `KeyedPCollectionTuple`.
`Pipeline`	`getPipeline()` Returns the owning `Pipeline` of this `PInput`.
`boolean`	`isEmpty()`
`static <K,InputT> KeyedPCollectionTuple<K>`	`of(TupleTag<InputT> tag, PCollection<KV<K,InputT>> pc)` Returns a new `KeyedPCollectionTuple<K>` with the given tag and initial PCollection.

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

- Method Detail
  - empty
```
public static <K> KeyedPCollectionTuple<K> empty(Pipeline pipeline)
```
    Returns an empty KeyedPCollectionTuple<K> on the given pipeline.
  - of
```
public static <K,InputT> KeyedPCollectionTuple<K> of(TupleTag<InputT> tag,
                                     PCollection<KV<K,InputT>> pc)
```
    Returns a new KeyedPCollectionTuple<K> with the given tag and initial PCollection.
  - and
```
public <V> KeyedPCollectionTuple<K> and(TupleTag<V> tag,
                               PCollection<KV<K,V>> pc)
```
    Returns a new KeyedPCollectionTuple<K> that is the same as this, appended with the given PCollection.
  - isEmpty
```
public boolean isEmpty()
```
  - getKeyedCollections
```
public List<KeyedPCollectionTuple.TaggedKeyedPCollection<K,?>> getKeyedCollections()
```
    Returns a list of TaggedKeyedPCollections for the PCollections contained in this KeyedPCollectionTuple.
  - apply
```
public <OutputT extends POutput> OutputT apply(PTransform<KeyedPCollectionTuple<K>,OutputT> transform)
```
    Applies the given PTransform to this input.
  - expand
```
public Collection<? extends PValue> expand()
```
    Expands the component PCollections, stripping off any tag-specific information.
    
    Specified by:
    
    expand in interface PInput
  - getKeyCoder
```
public Coder<K> getKeyCoder()
```
    Returns the key Coder for all PCollections in this KeyedPCollectionTuple.
  - getCoGbkResultSchema
```
public CoGbkResultSchema getCoGbkResultSchema()
```
    Returns the CoGbkResultSchema associated with this KeyedPCollectionTuple.
  - getPipeline
```
public Pipeline getPipeline()
```
    Description copied from interface: PInput
    
    Returns the owning Pipeline of this PInput.
    
    Specified by:
    
    getPipeline in interface PInput
  - finishSpecifying
```
public void finishSpecifying()
```
    Description copied from interface: PInput
    
    After building, finalizes this PInput to make it ready for being used as an input to a PTransform.
    Automatically invoked whenever apply() is invoked on this PInput, so users do not normally call this explicitly.
    
    Specified by:
    
    finishSpecifying in interface PInput

Class KeyedPCollectionTuple<K>

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Detail

empty

of

and

isEmpty

getKeyedCollections

apply

expand

getKeyCoder

getCoGbkResultSchema

getPipeline

finishSpecifying