Class OffsetTwo
- java.lang.Object
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- org.apache.sysds.runtime.compress.colgroup.offset.AOffset
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- org.apache.sysds.runtime.compress.colgroup.offset.OffsetTwo
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- All Implemented Interfaces:
Serializable
public class OffsetTwo extends AOffset
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description OffsetTwo(int first, int last)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static longestimateInMemorySize()longgetExactSizeOnDisk()Remember to include the ordinal of the type of offset list.longgetInMemorySize()Get the in memory size of the Offset objectAIteratorgetIterator()Get an iterator of the offsets while also maintaining the data index pointer.AOffsetIteratorgetOffsetIterator()Get an OffsetIterator of current offsets not maintaining the data index.intgetOffsetsLength()Get the length of the underlying offsets lists.intgetOffsetToFirst()Get the offset to the first indexintgetOffsetToLast()Get the offset to the last valueintgetSize()Get the number of contained elements, This method iterate the entire offset list, so it is not constant lookup.static OffsetTworeadFields(DataInput in)voidwrite(DataOutput out)Write the offsets to disk.-
Methods inherited from class org.apache.sysds.runtime.compress.colgroup.offset.AOffset
cacheIterator, equals, getIterator, preAggregateDenseMap, preAggregateSparseMap, toString
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Method Detail
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getIterator
public AIterator getIterator()
Description copied from class:AOffsetGet an iterator of the offsets while also maintaining the data index pointer.- Specified by:
getIteratorin classAOffset- Returns:
- AIterator that iterate through index and dictionary offset values.
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getOffsetIterator
public AOffsetIterator getOffsetIterator()
Description copied from class:AOffsetGet an OffsetIterator of current offsets not maintaining the data index.- Specified by:
getOffsetIteratorin classAOffset- Returns:
- AIterator that iterator through the delta offsets.
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getExactSizeOnDisk
public long getExactSizeOnDisk()
Description copied from class:AOffsetRemember to include the ordinal of the type of offset list.- Specified by:
getExactSizeOnDiskin classAOffset- Returns:
- the size on disk as a long.
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getSize
public int getSize()
Description copied from class:AOffsetGet the number of contained elements, This method iterate the entire offset list, so it is not constant lookup.
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getOffsetToFirst
public int getOffsetToFirst()
Description copied from class:AOffsetGet the offset to the first index- Specified by:
getOffsetToFirstin classAOffset- Returns:
- The first index offset
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getOffsetToLast
public int getOffsetToLast()
Description copied from class:AOffsetGet the offset to the last value- Specified by:
getOffsetToLastin classAOffset- Returns:
- The last values offset
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getOffsetsLength
public int getOffsetsLength()
Description copied from class:AOffsetGet the length of the underlying offsets lists.- Specified by:
getOffsetsLengthin classAOffset- Returns:
- The number of offsets.
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getInMemorySize
public long getInMemorySize()
Description copied from class:AOffsetGet the in memory size of the Offset object- Specified by:
getInMemorySizein classAOffset- Returns:
- In memory size as a long.
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estimateInMemorySize
public static long estimateInMemorySize()
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write
public void write(DataOutput out) throws IOException
Description copied from class:AOffsetWrite the offsets to disk. If you implement another remember to write the ordinal of the new type to disk as well and add it to the OffsetFactory.- Specified by:
writein classAOffset- Parameters:
out- The output to write to- Throws:
IOException- Exception that happens if the IO fails to write.
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readFields
public static OffsetTwo readFields(DataInput in) throws IOException
- Throws:
IOException
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