org.apache.iotdb.tsfile.read.filter.operator

Class Like<T extends Comparable<T>>

java.lang.Object

org.apache.iotdb.tsfile.read.filter.operator.Like<T>

Type Parameters:

T - comparable data type

All Implemented Interfaces:

Filter

Direct Known Subclasses:

ValueFilter.ValueLike

public class Like<T extends Comparable<T>>
extends Object
implements Filter

Like.

Field Summary

Fields

Modifier and Type	Field and Description
protected FilterType	filterType
protected Pattern	pattern
protected String	value

Constructor Summary

Constructors

Constructor and Description
Like(String value, FilterType filterType) The main idea of this part comes from https://codereview.stackexchange.com/questions/36861/convert-sql-like-to-regex/36864

Method Summary

Modifier and Type	Method and Description
boolean	containStartEndTime(long startTime, long endTime) To examine whether the partition [startTime, endTime] is subsets of filter.
Filter	copy()
void	deserialize(ByteBuffer buffer)
FilterSerializeId	getSerializeId()
boolean	satisfy(long time, Object value) To examine whether the single point(with time and value) is satisfied with the filter.
boolean	satisfy(Statistics statistics) To examine whether the statistics is satisfied with the filter.
boolean	satisfyStartEndTime(long startTime, long endTime) To examine whether the min time and max time are satisfied with the filter.
void	serialize(DataOutputStream outputStream)
String	toString()
String	unescapeString(String value) This Method is for unescaping strings except '\' before special string '%', '_', '\', because we need to use '\' to judege whether to replace this to regexp string

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.iotdb.tsfile.read.filter.basic.Filter

serialize

Field Detail

value

protected String value

filterType

protected FilterType filterType

pattern

protected Pattern pattern

Constructor Detail

Like

public Like(String value,
            FilterType filterType)

The main idea of this part comes from https://codereview.stackexchange.com/questions/36861/convert-sql-like-to-regex/36864

Method Detail

satisfy

public boolean satisfy(Statistics statistics)

Description copied from interface: Filter

To examine whether the statistics is satisfied with the filter.

Specified by:

satisfy in interface Filter

Parameters:

statistics - statistics with min time, max time, min value, max value.

satisfy

public boolean satisfy(long time,
                       Object value)

Description copied from interface: Filter

To examine whether the single point(with time and value) is satisfied with the filter.

Specified by:

satisfy in interface Filter

Parameters:

time - single point time

value - single point value

satisfyStartEndTime

public boolean satisfyStartEndTime(long startTime,
                                   long endTime)

Description copied from interface: Filter

To examine whether the min time and max time are satisfied with the filter.

Specified by:

satisfyStartEndTime in interface Filter

Parameters:

startTime - start time of a page, series or device

endTime - end time of a page, series or device

containStartEndTime

public boolean containStartEndTime(long startTime,
                                   long endTime)

Description copied from interface: Filter

To examine whether the partition [startTime, endTime] is subsets of filter.

Specified by:

containStartEndTime in interface Filter

Parameters:

startTime - start time of a partition

endTime - end time of a partition

copy

public Filter copy()

Specified by:

copy in interface Filter

serialize

public void serialize(DataOutputStream outputStream)

Specified by:

serialize in interface Filter

deserialize

public void deserialize(ByteBuffer buffer)

Specified by:

deserialize in interface Filter

toString

public String toString()

Overrides:

toString in class Object

getSerializeId

public FilterSerializeId getSerializeId()

Specified by:

getSerializeId in interface Filter

unescapeString

public String unescapeString(String value)

This Method is for unescaping strings except '\' before special string '%', '_', '\', because we need to use '\' to judege whether to replace this to regexp string