org.apache.beam.sdk.values (Apache Beam SDK 0.2.0-incubating API)

Interface Summary
Interface	Description
PCollectionView<T>	A `PCollectionView<T>` is an immutable view of a `PCollection` as a value of type `T` that can be accessed as a side input to a `ParDo` transform.
PInput	The interface for things that might be input to a `PTransform`.
POutput	The interface for things that might be output from a `PTransform`.
PValue	The interface for values that can be input to and output from `PTransforms`.

Class Summary
Class	Description
KV<K,V>	An immutable key/value pair.
KV.OrderByKey<K extends Comparable<? super K>,V>	A `Comparator` that orders `KVs` by the natural ordering of their keys.
KV.OrderByValue<K,V extends Comparable<? super V>>	A `Comparator` that orders `KVs` by the natural ordering of their values.
PBegin	`PBegin` is the "input" to a root `PTransform`, such as `Read` or `Create`.
PCollection<T>	A `PCollection<T>` is an immutable collection of values of type `T`.
PCollectionList<T>	A `PCollectionList<T>` is an immutable list of homogeneously typed `PCollection<T>s`.
PCollectionTuple	A `PCollectionTuple` is an immutable tuple of heterogeneously-typed `PCollections`, "keyed" by `TupleTags`.
PDone	`PDone` is the output of a `PTransform` that has a trivial result, such as a `Write`.
POutputValueBase	A `POutputValueBase` is the abstract base class of `PTransform` outputs.
PValueBase	A `PValueBase` is an abstract base class that provides sensible default implementations for methods of `PValue`.
TimestampedValue<V>	An immutable pair of a value and a timestamp.
TimestampedValue.TimestampedValueCoder<T>	A `Coder` for `TimestampedValue`.
TupleTag<V>	A `TupleTag` is a typed tag to use as the key of a heterogeneously typed tuple, like `PCollectionTuple`.
TupleTagList	A `TupleTagList` is an immutable list of heterogeneously typed `TupleTags`.
TypeDescriptor<T>	A description of a Java type, including actual generic parameters where possible.
TypeDescriptors	A utility class containing the Java primitives for `TypeDescriptor` equivalents.
TypedPValue<T>	A `TypedPValue<T>` is the abstract base class of things that store some number of values of type `T`.

Enum Summary
Enum Description

PCollection.IsBounded
The enumeration of cases for whether a PCollection is bounded.

Enum Summary
Enum	Description
PCollection.IsBounded	The enumeration of cases for whether a `PCollection` is bounded.

Package org.apache.beam.sdk.values Description

Defines PCollection and other classes for representing data in a Pipeline.

In particular, see these collection abstractions:

PCollection - an immutable collection of values of type T and the main representation for data in Dataflow.
PCollectionView - an immutable view of a PCollection that can be accessed as a side input of a ParDo PTransform.
PCollectionTuple - a heterogeneous tuple of PCollections used in cases where a PTransform takes or returns multiple PCollections.
PCollectionList - a homogeneous list of PCollections used, for example, as input to Flatten.

And these classes for individual values play particular roles in Dataflow:

KV - a key/value pair that is used by keyed transforms, most notably GroupByKey.
TimestampedValue - a timestamp/value pair that is used for windowing and handling out-of-order data in streaming execution.

For further details, see the documentation for each class in this package.