public static class PCollectionViews.ValueOrMetadataCoder<T,MetaT> extends StructuredCoder<PCollectionViews.ValueOrMetadata<T,MetaT>>
PCollectionViews.ValueOrMetadata.Coder.Context, Coder.NonDeterministicException| Modifier and Type | Method and Description |
|---|---|
static <T,MetaT> PCollectionViews.ValueOrMetadataCoder<T,MetaT> |
create(Coder<T> valueCoder,
Coder<MetaT> metadataCoder) |
PCollectionViews.ValueOrMetadata<T,MetaT> |
decode(java.io.InputStream inStream)
Decodes a value of type
T from the given input stream in the given context. |
void |
encode(PCollectionViews.ValueOrMetadata<T,MetaT> value,
java.io.OutputStream outStream)
Encodes the given value of type
T onto the given output stream. |
java.util.List<? extends Coder<?>> |
getCoderArguments()
|
void |
verifyDeterministic()
Throw
Coder.NonDeterministicException if the coding is not deterministic. |
equals, getComponents, hashCode, toStringconsistentWithEquals, decode, encode, getEncodedElementByteSize, getEncodedTypeDescriptor, isRegisterByteSizeObserverCheap, registerByteSizeObserver, structuralValue, verifyDeterministic, verifyDeterministicpublic static <T,MetaT> PCollectionViews.ValueOrMetadataCoder<T,MetaT> create(Coder<T> valueCoder, Coder<MetaT> metadataCoder)
public void encode(PCollectionViews.ValueOrMetadata<T,MetaT> value, java.io.OutputStream outStream) throws CoderException, java.io.IOException
CoderT onto the given output stream. Multiple elements can
be encoded next to each other on the output stream, each coder should encode information to
know how many bytes to read when decoding. A common approach is to prefix the encoding with the
element's encoded length.encode in class Coder<PCollectionViews.ValueOrMetadata<T,MetaT>>CoderException - if the value could not be encoded for some reasonjava.io.IOException - if writing to the OutputStream fails for some reasonpublic PCollectionViews.ValueOrMetadata<T,MetaT> decode(java.io.InputStream inStream) throws CoderException, java.io.IOException
CoderT from the given input stream in the given context. Returns the
decoded value. Multiple elements can be encoded next to each other on the input stream, each
coder should encode information to know how many bytes to read when decoding. A common approach
is to prefix the encoding with the element's encoded length.decode in class Coder<PCollectionViews.ValueOrMetadata<T,MetaT>>CoderException - if the value could not be decoded for some reasonjava.io.IOException - if reading from the InputStream fails for some reasonpublic java.util.List<? extends Coder<?>> getCoderArguments()
CoderCoder for a parameterized type, returns the list of Coders being
used for each of the parameters in the same order they appear within the parameterized type's
type signature. If this cannot be done, or this Coder does not encode/decode a
parameterized type, returns the empty list.getCoderArguments in class Coder<PCollectionViews.ValueOrMetadata<T,MetaT>>public void verifyDeterministic()
throws Coder.NonDeterministicException
CoderCoder.NonDeterministicException if the coding is not deterministic.
In order for a Coder to be considered deterministic, the following must be true:
Object.equals() or Comparable.compareTo(), if supported) have the same encoding.
Coder always produces a canonical encoding, which is the same for an instance
of an object even if produced on different computers at different times.
verifyDeterministic in class Coder<PCollectionViews.ValueOrMetadata<T,MetaT>>Coder.NonDeterministicException - if this coder is not deterministic.