Package org.apache.druid.query.aggregation.constant

Class LongConstantBufferAggregator

java.lang.Object
org.apache.druid.query.aggregation.constant.LongConstantBufferAggregator
All Implemented Interfaces:
BufferAggregator, HotLoopCallee
public class LongConstantBufferAggregator extends Object implements BufferAggregator
BufferAggregator variant of LongConstantAggregator

  • Constructor Summary

    Constructors
    Constructor
    Description
    LongConstantBufferAggregator(long value)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    aggregate(ByteBuffer buf, int position)
    Aggregates metric values into the given aggregate byte representation Implementations of this method must read in the aggregate value from the buffer at the given position, aggregate the next element of data and write the updated aggregate value back into the buffer.
    void
    close()
    Release any resources used by the aggregator.
    Object
    get(ByteBuffer buf, int position)
    Returns the intermediate object representation of the given aggregate.
    float
    getFloat(ByteBuffer buf, int position)
    Returns the float representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value.
    long
    getLong(ByteBuffer buf, int position)
    Returns the long representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value.
    void
    init(ByteBuffer buf, int position)
    Initializes the buffer location Implementations of this method must initialize the byte buffer at the given position Implementations must not change the position, limit or mark of the given buffer This method must not exceed the number of bytes returned by AggregatorFactory.getMaxIntermediateSizeWithNulls() in the corresponding AggregatorFactory

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface org.apache.druid.query.aggregation.BufferAggregator

    getDouble, inspectRuntimeShape, isNull, relocate

  • Constructor Details

    • LongConstantBufferAggregator

      public LongConstantBufferAggregator(long value)

  • Method Details

    • init

      public void init(ByteBuffer buf, int position)
      Description copied from interface: BufferAggregator
      Initializes the buffer location Implementations of this method must initialize the byte buffer at the given position Implementations must not change the position, limit or mark of the given buffer This method must not exceed the number of bytes returned by AggregatorFactory.getMaxIntermediateSizeWithNulls() in the corresponding AggregatorFactory
      Specified by:
      init in interface BufferAggregator
      Parameters:
      buf - byte buffer to initialize
      position - offset within the byte buffer for initialization

    • aggregate

      public void aggregate(ByteBuffer buf, int position)
      Description copied from interface: BufferAggregator
      Aggregates metric values into the given aggregate byte representation Implementations of this method must read in the aggregate value from the buffer at the given position, aggregate the next element of data and write the updated aggregate value back into the buffer. Implementations must not change the position, limit or mark of the given buffer
      Specified by:
      aggregate in interface BufferAggregator
      Parameters:
      buf - byte buffer storing the byte array representation of the aggregate
      position - offset within the byte buffer at which the current aggregate value is stored

    • get

      public Object get(ByteBuffer buf, int position)
      Description copied from interface: BufferAggregator
      Returns the intermediate object representation of the given aggregate. Converts the given byte buffer representation into an intermediate aggregate Object Implementations must not change the position, limit or mark of the given buffer. The object returned must not have any references to the given buffer (i.e., make a copy), since the underlying buffer is a shared resource and may be given to another processing thread while the objects returned by this aggregator are still in use. If the corresponding AggregatorFactory.combine(Object, Object) method for this aggregator expects its inputs to be mutable, then the object returned by this method must be mutable.
      Specified by:
      get in interface BufferAggregator
      Parameters:
      buf - byte buffer storing the byte array representation of the aggregate
      position - offset within the byte buffer at which the aggregate value is stored
      Returns:
      the Object representation of the aggregate

    • getFloat

      public float getFloat(ByteBuffer buf, int position)
      Description copied from interface: BufferAggregator
      Returns the float representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value. Implementations must not change the position, limit or mark of the given buffer Implementations are only required to support this method if they are aggregations which have an AggregatorFactory.getIntermediateType() ()} of ValueType.FLOAT. If unimplemented, throwing an UnsupportedOperationException is common and recommended.
      Specified by:
      getFloat in interface BufferAggregator
      Parameters:
      buf - byte buffer storing the byte array representation of the aggregate
      position - offset within the byte buffer at which the aggregate value is stored
      Returns:
      the float representation of the aggregate

    • getLong

      public long getLong(ByteBuffer buf, int position)
      Description copied from interface: BufferAggregator
      Returns the long representation of the given aggregate byte array Converts the given byte buffer representation into the intermediate aggregate value. Implementations must not change the position, limit or mark of the given buffer Implementations are only required to support this method if they are aggregations which have an AggregatorFactory.getIntermediateType() of of ValueType.LONG. If unimplemented, throwing an UnsupportedOperationException is common and recommended.
      Specified by:
      getLong in interface BufferAggregator
      Parameters:
      buf - byte buffer storing the byte array representation of the aggregate
      position - offset within the byte buffer at which the aggregate value is stored
      Returns:
      the long representation of the aggregate

    • close

      public void close()
      Description copied from interface: BufferAggregator
      Release any resources used by the aggregator. The aggregator may be reused after this call, by calling BufferAggregator.init(ByteBuffer, int) followed by other methods as normal. This call would be more properly named "reset", but we use the name "close" to improve compatibility with existing aggregator implementations in extensions.
      Specified by:
      close in interface BufferAggregator