Package org.apache.iotdb.db.metadata.mtree.traverser.collector

Class MNodeCollector<T>

java.lang.Object

org.apache.iotdb.db.metadata.mtree.traverser.Traverser

org.apache.iotdb.db.metadata.mtree.traverser.collector.CollectorTraverser<T>

org.apache.iotdb.db.metadata.mtree.traverser.collector.MNodeCollector<T>

Direct Known Subclasses:

MNodeAboveSGCollector

public abstract class MNodeCollector<T>
extends CollectorTraverser<T>

This class defines any node in MTree as potential target node. On finding a path matching the given pattern, if a level is specified and the path is longer than the specified level, MNodeLevelCounter finds the node of the specified level on the path and process it. The same node will not be processed more than once. If a level is not given, the current node is processed.

Field Summary

Fields

Modifier and Type	Field	Description
protected LocalSchemaProcessor.StorageGroupFilter	storageGroupFilter
protected int	targetLevel

Fields inherited from class org.apache.iotdb.db.metadata.mtree.traverser.collector.CollectorTraverser

count, curOffset, hasLimit, limit, offset, resultSet

Fields inherited from class org.apache.iotdb.db.metadata.mtree.traverser.Traverser

isInTemplate, isPrefixMatch, isPrefixStart, nodes, shouldTraverseTemplate, startIndex, startLevel, startNode, store, templateMap, traverseContext

Constructor Summary

Constructors

Constructor	Description
MNodeCollector(IMNode startNode, org.apache.iotdb.commons.path.PartialPath path, IMTreeStore store)

Method Summary

Modifier and Type	Method	Description
protected boolean	processFullMatchedMNode(IMNode node, int idx, int level)	full match: root.sg.d full match root.sg.**(pattern)
protected boolean	processInternalMatchedMNode(IMNode node, int idx, int level)	internal match: root.sg internal match root.sg.**(pattern)
void	setStorageGroupFilter(LocalSchemaProcessor.StorageGroupFilter storageGroupFilter)
void	setTargetLevel(int targetLevel)
protected abstract void	transferToResult(IMNode node)
protected void	traverse(IMNode node, int idx, int level)	extends traversal with limit restriction

Methods inherited from class org.apache.iotdb.db.metadata.mtree.traverser.collector.CollectorTraverser

getCurOffset, getResult, setLimit, setOffset, setResultSet

Methods inherited from class org.apache.iotdb.db.metadata.mtree.traverser.Traverser

getCurrentPartialPath, getCurrentPathNodes, getStorageGroupNodeInTraversePath, getUpperTemplate, processMultiLevelWildcard, processNameMatch, processOneLevelWildcard, setPrefixMatch, setTemplateMap, traverse

Methods inherited from class java.lang.Object

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

Field Detail

storageGroupFilter

protected LocalSchemaProcessor.StorageGroupFilter storageGroupFilter

targetLevel

protected int targetLevel

Constructor Detail

MNodeCollector

public MNodeCollector(IMNode startNode,
                      org.apache.iotdb.commons.path.PartialPath path,
                      IMTreeStore store)
               throws org.apache.iotdb.commons.exception.MetadataException

Throws:

org.apache.iotdb.commons.exception.MetadataException

Method Detail

traverse

protected void traverse(IMNode node,
                        int idx,
                        int level)
                 throws org.apache.iotdb.commons.exception.MetadataException

Description copied from class: CollectorTraverser

extends traversal with limit restriction

Overrides:

traverse in class CollectorTraverser<T>

Parameters:

node - current node that match the targetName in given path

idx - the index of targetName in given path

level - the level of current node in MTree

Throws:

org.apache.iotdb.commons.exception.MetadataException - some result process may throw MetadataException

processInternalMatchedMNode

protected boolean processInternalMatchedMNode(IMNode node,
                                              int idx,
                                              int level)

Description copied from class: Traverser

internal match: root.sg internal match root.sg.**(pattern)

Specified by:

processInternalMatchedMNode in class Traverser

Returns:

whether this branch of recursive traversal should stop; if true, stop

processFullMatchedMNode

protected boolean processFullMatchedMNode(IMNode node,
                                          int idx,
                                          int level)

Description copied from class: Traverser

full match: root.sg.d full match root.sg.**(pattern)

Specified by:

processFullMatchedMNode in class Traverser

Returns:

whether this branch of recursive traversal should stop; if true, stop

transferToResult

protected abstract void transferToResult(IMNode node)

setStorageGroupFilter

public void setStorageGroupFilter(LocalSchemaProcessor.StorageGroupFilter storageGroupFilter)

setTargetLevel

public void setTargetLevel(int targetLevel)