Package org.apache.iotdb.tsfile.write.writer.tsmiterator

Class DiskTSMIterator

java.lang.Object

org.apache.iotdb.tsfile.write.writer.tsmiterator.TSMIterator

org.apache.iotdb.tsfile.write.writer.tsmiterator.DiskTSMIterator

public class DiskTSMIterator
extends TSMIterator

This class read ChunkMetadata iteratively from disk(.cmt file) and memory(list of ChunkGroupMetadata), and construct them as TimeseriesMetadata. It will read ChunkMetadata in disk first, and after all ChunkMetadata in disk is read, it will read ChunkMetadata in memory.

Field Summary

Fields inherited from class org.apache.iotdb.tsfile.write.writer.tsmiterator.TSMIterator

iterator, sortedChunkMetadataList

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DiskTSMIterator(java.io.File cmtFile, java.util.List<ChunkGroupMetadata> chunkGroupMetadataList, java.util.LinkedList<java.lang.Long> endPosForEachDevice)

Method Summary

Modifier and Type	Method	Description
boolean	hasNext()
Pair<Path,TimeseriesMetadata>	next()

Methods inherited from class org.apache.iotdb.tsfile.write.writer.tsmiterator.TSMIterator

constructOneTimeseriesMetadata, getTSMIteratorInDisk, getTSMIteratorInMemory, sortChunkMetadata

Methods inherited from class java.lang.Object

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

Constructor Detail

DiskTSMIterator

protected DiskTSMIterator(java.io.File cmtFile,
                          java.util.List<ChunkGroupMetadata> chunkGroupMetadataList,
                          java.util.LinkedList<java.lang.Long> endPosForEachDevice)
                   throws java.io.IOException

Throws:

java.io.IOException

Method Detail

hasNext

public boolean hasNext()

Overrides:

hasNext in class TSMIterator

next

public Pair<Path,TimeseriesMetadata> next()

Overrides:

next in class TSMIterator