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java.lang.Objectorg.apache.hadoop.hbase.types.Union2<A,B>
org.apache.hadoop.hbase.types.Union3<A,B,C>
@InterfaceAudience.Public @InterfaceStability.Evolving public abstract class Union3<A,B,C>
The Union
family of DataType
s encode one of a fixed
collection of Objects. They provide convenience methods which handle type
casting on your behalf.
Union2
Field Summary | |
---|---|
protected DataType<C> |
typeC
|
Fields inherited from class org.apache.hadoop.hbase.types.Union2 |
---|
typeA, typeB |
Constructor Summary | |
---|---|
Union3(DataType<A> typeA,
DataType<B> typeB,
DataType<C> typeC)
Create an instance of Union3 over the set of specified
types. |
Method Summary | |
---|---|
C |
decodeC(PositionedByteRange src)
Read an instance of the third type parameter from buffer src . |
Order |
getOrder()
Retrieve the sort Order imposed by this data type, or null when
natural ordering is not preserved. |
boolean |
isNullable()
Indicates whether this instance supports encoding null values. |
boolean |
isOrderPreserving()
Indicates whether this instance writes encoded byte[] 's
which preserve the natural sort order of the unencoded value. |
boolean |
isSkippable()
Indicates whether this instance is able to skip over it's encoded value. |
Methods inherited from class org.apache.hadoop.hbase.types.Union2 |
---|
decodeA, decodeB, encodedClass |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.hadoop.hbase.types.DataType |
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decode, encode, encodedLength, skip |
Field Detail |
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protected final DataType<C> typeC
Constructor Detail |
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public Union3(DataType<A> typeA, DataType<B> typeB, DataType<C> typeC)
Union3
over the set of specified
types.
Method Detail |
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public boolean isOrderPreserving()
DataType
byte[]
's
which preserve the natural sort order of the unencoded value.
isOrderPreserving
in interface DataType<Object>
isOrderPreserving
in class Union2<A,B>
true
when natural order is preserved,
false
otherwise.public Order getOrder()
DataType
Order
imposed by this data type, or null when
natural ordering is not preserved. Value is either ascending or
descending. Default is assumed to be Order.ASCENDING
.
getOrder
in interface DataType<Object>
getOrder
in class Union2<A,B>
public boolean isNullable()
DataType
DataType
s that support null should treat null as comparing
less than any non-null value for default sort ordering purposes.
isNullable
in interface DataType<Object>
isNullable
in class Union2<A,B>
true
when null is supported, false
otherwise.public boolean isSkippable()
DataType
DataType
s that are not skippable can only be used as the
right-most field of a Struct
.
isSkippable
in interface DataType<Object>
isSkippable
in class Union2<A,B>
public C decodeC(PositionedByteRange src)
src
.
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