Package com.illumon.iris.db.v2.sources

Class PrevColumnSource<T>

java.lang.Object
com.illumon.iris.db.v2.sources.AbstractColumnSource<T>
com.illumon.iris.db.v2.sources.PrevColumnSource<T>
All Implemented Interfaces:
ChunkSource<Attributes.Values>, ChunkSource.WithPrev<Attributes.Values>, DefaultChunkSource<Attributes.Values>, DefaultChunkSource.WithPrev<Attributes.Values>, FillContextMaker, GetContextMaker, ColumnSource<T>, ElementSource<T>, Releasable, TupleExporter<T>, TupleSource<T>, Serializable
public final class PrevColumnSource<T> extends AbstractColumnSource<T>
Wrapper ColumnSource that maps current data accessors to previous data accessors (and disables previous data accessors).
See Also:

  • Constructor Details

    • PrevColumnSource

      public PrevColumnSource(ColumnSource<T> originalSource)

  • Method Details

    • get

      public final T get(long index)
      Description copied from interface: ElementSource
      Get the value from the source. This may return boxed values for basic types.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the value at the index, potentially null.

    • getBoolean

      public final Boolean getBoolean(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a Boolean.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the boolean at the index, potentially null.

    • getByte

      public final byte getByte(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a byte.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the boolean at the index, null values are represented by QueryConstants.NULL_BYTE

    • getChar

      public final char getChar(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a char.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the char at the index, null values are represented by QueryConstants.NULL_CHAR

    • getDouble

      public final double getDouble(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a double.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the double at the index, null values are represented by QueryConstants.NULL_DOUBLE

    • getFloat

      public final float getFloat(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a float.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the float at the index, null values are represented by QueryConstants.NULL_FLOAT

    • getInt

      public final int getInt(long index)
      Description copied from interface: ElementSource
      Get the value at the index as an int.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the int at the index, null values are represented by QueryConstants.NULL_INT

    • getLong

      public final long getLong(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a long.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the long at the index, null values are represented by QueryConstants.NULL_LONG

    • getShort

      public final short getShort(long index)
      Description copied from interface: ElementSource
      Get the value at the index as a short.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the short at the index, null values are represented by QueryConstants.NULL_SHORT

    • getPrev

      public final T getPrev(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index. Previous values are used during an LTM update cycle to process changes in data. During normal operation previous values will be identical to current values.
      Parameters:
      index - the location in index space to get the value from.
      Returns:
      the previous value at the index, or null.

    • getPrevBoolean

      public final Boolean getPrevBoolean(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a Boolean. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous boolean at the index, or null.

    • getPrevByte

      public final byte getPrevByte(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a byte. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous boolean at the index, null values are represented by QueryConstants.NULL_BYTE

    • getPrevChar

      public final char getPrevChar(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a char. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous char at the index, null values are represented by QueryConstants.NULL_CHAR

    • getPrevDouble

      public final double getPrevDouble(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a double. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous double at the index, null values are represented by QueryConstants.NULL_DOUBLE

    • getPrevFloat

      public final float getPrevFloat(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a float. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous float at the index, null values are represented by QueryConstants.NULL_FLOAT

    • getPrevInt

      public final int getPrevInt(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as an int. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous int at the index, null values are represented by QueryConstants.NULL_INT

    • getPrevLong

      public final long getPrevLong(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a long. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous long at the index, null values are represented by QueryConstants.NULL_LONG

    • getPrevShort

      public final short getPrevShort(long index)
      Description copied from interface: ElementSource
      Get the previous value at the index as a short. See ElementSource.getPrev(long) for more details.
      Parameters:
      index - the location in index space to get the previous value from.
      Returns:
      the previous short at the index, null values are represented by QueryConstants.NULL_SHORT

    • getType

      public final Class<T> getType()
      Specified by:
      getType in interface ColumnSource<T>
      Overrides:
      getType in class AbstractColumnSource<T>

    • getComponentType

      public final Class<?> getComponentType()
      Specified by:
      getComponentType in interface ColumnSource<T>
      Overrides:
      getComponentType in class AbstractColumnSource<T>

    • isImmutable

      public final boolean isImmutable()
      Description copied from interface: ColumnSource
      Determine if this column source is immutable, meaning that the values at a given index key never change.
      Returns:
      true if the values at a given index of the column source never change, false otherwise

    • getNativeType

      public final Class<T> getNativeType()
      Specified by:
      getNativeType in interface ChunkSource<T>
      Specified by:
      getNativeType in interface ColumnSource<T>
      Overrides:
      getNativeType in class AbstractColumnSource<T>

    • getChunkType

      public final ChunkType getChunkType()
      Description copied from interface: ChunkSource
      Get the most suitable ChunkType for use with this ColumnSource.
      Returns:
      The ChunkType

    • makeGetContext

      public final ChunkSource.GetContext makeGetContext(int chunkCapacity, SharedContext sharedContext)
      Description copied from interface: GetContextMaker
      Allocate a new ChunkSource.GetContext for retrieving chunks from this GetContextMaker, typically a ChunkSource.
      Parameters:
      chunkCapacity - The maximum size required for any WritableChunk allocated as part of the result.
      sharedContext - Shared store of intermediate results.
      Returns:
      A context for use with get operations

    • getChunk

      public final Chunk<? extends Attributes.Values> getChunk(@NotNull ChunkSource.GetContext context, @NotNull OrderedKeys orderedKeys)
      Description copied from interface: ChunkSource
      Returns a chunk of data corresponding to the keys from the given OrderedKeys.
      Parameters:
      context - A context containing all mutable/state related data used in retrieving the Chunk. In particular, the Context may be used to provide a Chunk data pool
      orderedKeys - An OrderedKeys representing the keys to be fetched
      Returns:
      A chunk of data corresponding to the keys from the given OrderedKeys

    • getPrevChunk

      public final Chunk<? extends Attributes.Values> getPrevChunk(@NotNull ChunkSource.GetContext context, @NotNull OrderedKeys orderedKeys)
      Description copied from interface: ChunkSource.WithPrev
      Returns a chunk of previous data corresponding to the keys from the given OrderedKeys.
      Parameters:
      context - A context containing all mutable/state related data used in retrieving the Chunk. In particular, the Context may be used to provide a Chunk data pool
      orderedKeys - An OrderedKeys representing the keys to be fetched
      Returns:
      A chunk of data corresponding to the keys from the given OrderedKeys.

    • makeFillContext

      public final ChunkSource.FillContext makeFillContext(int chunkCapacity, SharedContext sharedContext)
      Description copied from interface: FillContextMaker
      Allocate a new ChunkSource.FillContext for filling chunks from this FillContextMaker, typically a ChunkSource.
      Parameters:
      chunkCapacity - The maximum size of any WritableChunk that will be filled with this context
      sharedContext - Shared store of intermediate results.
      Returns:
      A context for use with fill operations

    • fillChunk

      public final void fillChunk(@NotNull ChunkSource.FillContext context, @NotNull WritableChunk<? super Attributes.Values> destination, @NotNull OrderedKeys orderedKeys)
      Description copied from interface: ChunkSource
      Populates the given destination chunk with data corresponding to the keys from the given OrderedKeys.
      Specified by:
      fillChunk in interface ChunkSource<T>
      Overrides:
      fillChunk in class AbstractColumnSource<T>
      Parameters:
      context - A context containing all mutable/state related data used in retrieving the Chunk.
      destination - The chunk to be populated according to orderedKeys. No assumptions shall be made about the size of the chunk shall be made. The chunk will be populated from position [0,orderedKeys.size()).
      orderedKeys - An OrderedKeys representing the keys to be fetched

    • fillPrevChunk

      public final void fillPrevChunk(@NotNull ChunkSource.FillContext context, @NotNull WritableChunk<? super Attributes.Values> destination, @NotNull OrderedKeys orderedKeys)
      Description copied from interface: ChunkSource.WithPrev
      Populates the given destination chunk with data corresponding to the keys from the given OrderedKeys.
      Specified by:
      fillPrevChunk in interface ChunkSource.WithPrev<T>
      Overrides:
      fillPrevChunk in class AbstractColumnSource<T>
      Parameters:
      context - A context containing all mutable/state related data used in retrieving the Chunk.
      destination - The chunk to be populated according to orderedKeys. No assumptions shall be made about the size of the chunk shall be made. The chunk will be populated from position [0,orderedKeys.size()).
      orderedKeys - An OrderedKeys representing the keys to be fetched