Package org.apache.iotdb.tsfile.file.metadata

Class MetadataIndexConstructor

java.lang.Object

org.apache.iotdb.tsfile.file.metadata.MetadataIndexConstructor

public class MetadataIndexConstructor
extends Object

Method Summary

Modifier and Type	Method	Description
static void	addCurrentIndexNodeToQueue(MetadataIndexNode currentIndexNode, Queue<MetadataIndexNode> metadataIndexNodeQueue, TsFileOutput out)
static MetadataIndexNode	checkAndBuildLevelIndex(Map<String,MetadataIndexNode> deviceMetadataIndexMap, TsFileOutput out)
static MetadataIndexNode	constructMetadataIndex(Map<String,List<TimeseriesMetadata>> deviceTimeseriesMetadataMap, TsFileOutput out)	Construct metadata index tree.
static MetadataIndexNode	generateRootNode(Queue<MetadataIndexNode> metadataIndexNodeQueue, TsFileOutput out, MetadataIndexNodeType type)	Generate root node, using the nodes in the queue as leaf nodes.

Methods inherited from class java.lang.Object

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

Method Detail

constructMetadataIndex

public static MetadataIndexNode constructMetadataIndex(Map<String,List<TimeseriesMetadata>> deviceTimeseriesMetadataMap,
                                                       TsFileOutput out)
                                                throws IOException

Construct metadata index tree.

Parameters:

deviceTimeseriesMetadataMap - device => TimeseriesMetadata list

out - tsfile output

Throws:

IOException - exception when operating stream

checkAndBuildLevelIndex

public static MetadataIndexNode checkAndBuildLevelIndex(Map<String,MetadataIndexNode> deviceMetadataIndexMap,
                                                        TsFileOutput out)
                                                 throws IOException

Throws:

IOException

generateRootNode

public static MetadataIndexNode generateRootNode(Queue<MetadataIndexNode> metadataIndexNodeQueue,
                                                 TsFileOutput out,
                                                 MetadataIndexNodeType type)
                                          throws IOException

Generate root node, using the nodes in the queue as leaf nodes. The final metadata tree has two levels: measurement leaf nodes will generate to measurement root node; device leaf nodes will generate to device root node

Parameters:

metadataIndexNodeQueue - queue of metadataIndexNode

out - tsfile output

type - MetadataIndexNode type

Throws:

IOException - exception when operating stream

addCurrentIndexNodeToQueue

public static void addCurrentIndexNodeToQueue(MetadataIndexNode currentIndexNode,
                                              Queue<MetadataIndexNode> metadataIndexNodeQueue,
                                              TsFileOutput out)
                                       throws IOException

Throws:

IOException