Package org.apache.cassandra.serializers

Class SetSerializer<T>

java.lang.Object

org.apache.cassandra.serializers.TypeSerializer<T>

org.apache.cassandra.serializers.CollectionSerializer<T>

org.apache.cassandra.serializers.SetSerializer<T>

public class SetSerializer<T>
extends CollectionSerializer<T>

Field Summary

Fields

Modifier and Type	Field	Description
TypeSerializer<T>	elements

Constructor Summary

Constructors

Constructor	Description
SetSerializer(TypeSerializer<T> elements, ValueComparators comparators)

Method Summary

Modifier and Type	Method	Description
<V> java.util.Set<T>	deserialize(V input, ValueAccessor<V> accessor)
int	getElementCount(java.util.Set<T> value)
com.google.common.collect.Range<java.lang.Integer>	getIndexesRangeFromSerialized(java.nio.ByteBuffer collection, java.nio.ByteBuffer from, java.nio.ByteBuffer to, AbstractType<?> comparator)	Returns the range of indexes corresponding to the specified range of elements in the serialized collection.
int	getIndexFromSerialized(java.nio.ByteBuffer collection, java.nio.ByteBuffer key, AbstractType<?> comparator)	Returns the index of an element in a serialized collection.
static <T> SetSerializer<T>	getInstance(TypeSerializer<T> elements, ValueComparators comparators)
java.nio.ByteBuffer	getSerializedValue(java.nio.ByteBuffer input, java.nio.ByteBuffer key, AbstractType<?> comparator)	Extract an element from a serialized collection.
java.nio.ByteBuffer	getSliceFromSerialized(java.nio.ByteBuffer collection, java.nio.ByteBuffer from, java.nio.ByteBuffer to, AbstractType<?> comparator, boolean frozen)	Returns the slice of a collection directly from its serialized value.
java.lang.Class<java.util.Set<T>>	getType()
java.util.List<java.nio.ByteBuffer>	serializeValues(java.util.Set<T> values)
java.lang.String	toString(java.util.Set<T> value)
<V> void	validate(V input, ValueAccessor<V> accessor)

Methods inherited from class org.apache.cassandra.serializers.CollectionSerializer

copyAsNewCollection, forEach, pack, pack, readCollectionSize, readNonNullValue, readValue, serialize, sizeOfCollectionSize, sizeOfValue, skipValue, skipValue, writeCollectionSize, writeValue

Methods inherited from class org.apache.cassandra.serializers.TypeSerializer

deserialize, isNull, isNull, shouldQuoteCQLLiterals, toCQLLiteral, toCQLLiteralNonNull, toCQLLiteralNoQuote, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

elements

public final TypeSerializer<T> elements

Constructor Detail

SetSerializer

public SetSerializer(TypeSerializer<T> elements,
                     ValueComparators comparators)

Method Detail

getInstance

public static <T> SetSerializer<T> getInstance(TypeSerializer<T> elements,
                                               ValueComparators comparators)

serializeValues

public java.util.List<java.nio.ByteBuffer> serializeValues(java.util.Set<T> values)

Specified by:

serializeValues in class CollectionSerializer<java.util.Set<T>>

getElementCount

public int getElementCount(java.util.Set<T> value)

Specified by:

getElementCount in class CollectionSerializer<java.util.Set<T>>

validate

public <V> void validate(V input,
                         ValueAccessor<V> accessor)

Specified by:

validate in class TypeSerializer<java.util.Set<T>>

deserialize

public <V> java.util.Set<T> deserialize(V input,
                                        ValueAccessor<V> accessor)

Specified by:

deserialize in class TypeSerializer<java.util.Set<T>>

toString

public java.lang.String toString(java.util.Set<T> value)

Specified by:

toString in class TypeSerializer<java.util.Set<T>>

getType

public java.lang.Class<java.util.Set<T>> getType()

Specified by:

getType in class TypeSerializer<java.util.Set<T>>

getSerializedValue

public java.nio.ByteBuffer getSerializedValue(java.nio.ByteBuffer input,
                                              java.nio.ByteBuffer key,
                                              AbstractType<?> comparator)

Description copied from class: CollectionSerializer

Extract an element from a serialized collection.

Note that this is only supported to sets and maps. For sets, this mostly ends up being a check for the presence of the provide key: it will return the key if it's present and null otherwise.

Specified by:

getSerializedValue in class CollectionSerializer<java.util.Set<T>>

Parameters:

input - the serialized collection. This cannot be null.

key - the key to extract (This cannot be null nor ByteBufferUtil.UNSET_BYTE_BUFFER).

comparator - the type to use to compare the key value to those in the collection.

Returns:

the value associated with key if one exists, null otherwise

getSliceFromSerialized

public java.nio.ByteBuffer getSliceFromSerialized(java.nio.ByteBuffer collection,
                                                  java.nio.ByteBuffer from,
                                                  java.nio.ByteBuffer to,
                                                  AbstractType<?> comparator,
                                                  boolean frozen)

Description copied from class: CollectionSerializer

Returns the slice of a collection directly from its serialized value.

If the slice contains no elements an empty collection will be returned for frozen collections, and a null one for non-frozen collections.

Specified by:

getSliceFromSerialized in class CollectionSerializer<T>

Parameters:

collection - the serialized collection. This cannot be null.

from - the left bound of the slice to extract. This cannot be null but if this is ByteBufferUtil.UNSET_BYTE_BUFFER, then the returned slice starts at the beginning of collection.

comparator - the type to use to compare the from and to values to those in the collection.

frozen - true if the collection is a frozen one, false otherwise

Returns:

a serialized collection corresponding to slice [from, to] of collection.

getIndexFromSerialized

public int getIndexFromSerialized(java.nio.ByteBuffer collection,
                                  java.nio.ByteBuffer key,
                                  AbstractType<?> comparator)

Description copied from class: CollectionSerializer

Returns the index of an element in a serialized collection.

Note that this is only supported by sets and maps, but not by lists.

Specified by:

getIndexFromSerialized in class CollectionSerializer<T>

Parameters:

collection - The serialized collection. This cannot be null.

key - The key for which the index must be found. This cannot be null nor ByteBufferUtil.UNSET_BYTE_BUFFER).

comparator - The type to use to compare the key value to those in the collection.

Returns:

The index of the element associated with key if one exists, -1 otherwise.

getIndexesRangeFromSerialized

public com.google.common.collect.Range<java.lang.Integer> getIndexesRangeFromSerialized(java.nio.ByteBuffer collection,
                                                                                        java.nio.ByteBuffer from,
                                                                                        java.nio.ByteBuffer to,
                                                                                        AbstractType<?> comparator)

Description copied from class: CollectionSerializer

Returns the range of indexes corresponding to the specified range of elements in the serialized collection.

Note that this is only supported by sets and maps, but not by lists.

Specified by:

getIndexesRangeFromSerialized in class CollectionSerializer<T>

Parameters:

collection - The serialized collection. This cannot be null.

from - The left bound of the slice to extract. This cannot be null but if this is ByteBufferUtil.UNSET_BYTE_BUFFER, then the returned slice starts at the beginning of the collection.

to - The left bound of the slice to extract. This cannot be null but if this is ByteBufferUtil.UNSET_BYTE_BUFFER, then the returned slice ends at the end of the collection.

comparator - The type to use to compare the from and to values to those in the collection.

Returns:

The range of indexes corresponding to specified range of elements.