org.apache.solr.client.solrj.io.stream

类 JoinStream

java.lang.Object

org.apache.solr.client.solrj.io.stream.TupleStream

org.apache.solr.client.solrj.io.stream.JoinStream

所有已实现的接口:

Closeable, Serializable, AutoCloseable, Expressible, MapSerializable, MapWriter, NavigableObject

直接已知子类:

BiJoinStream

public abstract class JoinStream
extends TupleStream
implements Expressible

Defines a JoinStream which can hold N streams, all joined with the same equalitor

从以下版本开始:

6.0.0

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.apache.solr.client.solrj.io.stream.TupleStream

TupleStream.IgnoreException

从接口继承的嵌套类/接口 org.apache.solr.common.MapWriter

MapWriter.EntryWriter

字段概要

字段

限定符和类型	字段和说明
protected StreamEqualitor	eq

构造器概要

构造器

构造器和说明
JoinStream(StreamEqualitor eq, TupleStream first, TupleStream second, TupleStream... others)
JoinStream(StreamExpression expression, StreamFactory factory)

方法概要

限定符和类型	方法和说明
List<TupleStream>	children()
void	close()
int	getCost()
PushBackStream	getStream(int idx)
protected boolean	isValidTupleOrder()
protected Tuple	loadEqualTupleGroup(PushBackStream stream, LinkedList<Tuple> group, StreamComparator groupComparator) Given the stream, start from beginning and load group with all tuples that are equal to the first in stream (including the first one in the stream).
void	open()
void	setStreamContext(StreamContext context)
Explanation	toExplanation(StreamFactory factory) Returns an explanation about the stream object
StreamExpression	toExpression(StreamFactory factory)
protected abstract void	validateTupleOrder()

从类继承的方法 org.apache.solr.client.solrj.io.stream.TupleStream

getShards, getShards, getStreamNodeId, getStreamSort, read, writeMap

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.solr.common.MapWriter

jsonStr, toMap

从接口继承的方法 org.apache.solr.common.NavigableObject

_forEachEntry, _forEachEntry, _forEachEntry, _get, _get, _getStr, _getStr, _size

字段详细资料

eq

protected StreamEqualitor eq

构造器详细资料

JoinStream

public JoinStream(StreamEqualitor eq,
                  TupleStream first,
                  TupleStream second,
                  TupleStream... others)

JoinStream

public JoinStream(StreamExpression expression,
                  StreamFactory factory)
           throws IOException

抛出:

IOException

方法详细资料

validateTupleOrder

protected abstract void validateTupleOrder()
                                    throws IOException

抛出:

IOException

toExpression

public StreamExpression toExpression(StreamFactory factory)
                              throws IOException

指定者:

toExpression 在接口中 Expressible

抛出:

IOException

toExplanation

public Explanation toExplanation(StreamFactory factory)
                          throws IOException

从接口复制的说明: Expressible

Returns an explanation about the stream object

指定者:

toExplanation 在接口中 Expressible

指定者:

toExplanation 在类中 TupleStream

参数:

factory - Stream factory for this, contains information about the function name

返回:

Explanation about this stream object containing explanations of any child stream objects

抛出:

IOException - throw on any error

setStreamContext

public void setStreamContext(StreamContext context)

指定者:

setStreamContext 在类中 TupleStream

open

public void open()
          throws IOException

指定者:

open 在类中 TupleStream

抛出:

IOException

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

指定者:

close 在类中 TupleStream

抛出:

IOException

children

public List<TupleStream> children()

指定者:

children 在类中 TupleStream

getStream

public PushBackStream getStream(int idx)

isValidTupleOrder

protected boolean isValidTupleOrder()

loadEqualTupleGroup

protected Tuple loadEqualTupleGroup(PushBackStream stream,
                                    LinkedList<Tuple> group,
                                    StreamComparator groupComparator)
                             throws IOException

Given the stream, start from beginning and load group with all tuples that are equal to the first in stream (including the first one in the stream). All matched tuples are removed from the stream. Result is at least one tuple will be read from the stream and 0 or more tuples will exist in the group. If the first tuple is EOF then the group will have 0 items. Else it will have at least one item. The first group member is returned.

参数:

group - - should be empty

抛出:

IOException

getCost

public int getCost()

覆盖:

getCost 在类中 TupleStream