org.rifidi.edge.api.service

Class EsperUtil

java.lang.Object

org.rifidi.edge.api.service.EsperUtil

public class EsperUtil
extends java.lang.Object

This class has some static util methods to help forming esper strings.

Author:

Kyle Neumeier - kyle@pramari.com

Constructor Summary

Constructors

Constructor and Description
EsperUtil()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	buildInsertStatement(java.lang.String windowName, java.util.List<ReadZone> readZones, boolean useRegex) A helper method to create the "insert into" statement.
static java.lang.String	buildInsertStatement(java.lang.String windowname, ReadZone readZone) A helper method to create the "insert into" statement.
static java.lang.Float	esperTimetoTime(java.lang.String esperTime) This method takes in an esper expression for time (such as '1.5 min') and returns the number as a float.
static java.util.concurrent.TimeUnit	esperTimetoTimeUnit(java.lang.String esperTime) This method takes in an esper expression for time (such as '1.5 min') and returns the TimeUnit object for the unit of time (such as TimeUnit.Minute)
static java.lang.String	returnReaderMatch(java.util.HashMap<java.lang.String,ReadZone> readzones, boolean useRegex, java.lang.String reader, java.lang.Integer antenna)
static java.lang.String	timeUnitToEsperTime(float time, java.util.concurrent.TimeUnit timeUnit) This method converts between a time and timeunit to an esper time string.
static java.lang.String	whereClause(java.util.List<ReadZone> readzones, boolean useRegex) A private method to create the where clause in the select statement

Methods inherited from class java.lang.Object

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

Constructor Detail

EsperUtil

public EsperUtil()

Method Detail

timeUnitToEsperTime

public static java.lang.String timeUnitToEsperTime(float time,
                                                   java.util.concurrent.TimeUnit timeUnit)

This method converts between a time and timeunit to an esper time string. For example 1.5 TimeUnit.Seconds would be converted to the string '1.5 sec'.

Parameters:

time - The time must be greater than 0

timeUnit - Valid TimeUnits are DAYS, HOURS, MINUTES, SECONDS, and MILLISECONDS.

Returns:

esperTimetoTime

public static java.lang.Float esperTimetoTime(java.lang.String esperTime)

This method takes in an esper expression for time (such as '1.5 min') and returns the number as a float.

Parameters:

esperTime -

Returns:

esperTimetoTimeUnit

public static java.util.concurrent.TimeUnit esperTimetoTimeUnit(java.lang.String esperTime)

This method takes in an esper expression for time (such as '1.5 min') and returns the TimeUnit object for the unit of time (such as TimeUnit.Minute)

Parameters:

esperTime -

Returns:

buildInsertStatement

public static java.lang.String buildInsertStatement(java.lang.String windowName,
                                                    java.util.List<ReadZone> readZones,
                                                    boolean useRegex)

A helper method to create the "insert into" statement. Only tags seen in the listed readzones are inserted into the given window. If the List is empty, tags from all readers and antennas are inserted. The list cannot be null.

Returns:

buildInsertStatement

public static java.lang.String buildInsertStatement(java.lang.String windowname,
                                                    ReadZone readZone)

A helper method to create the "insert into" statement. Only tags seen in the given readzone are inserted into the given window. The readzone cannot be null.

Parameters:

windowname -

readZone -

Returns:

whereClause

public static java.lang.String whereClause(java.util.List<ReadZone> readzones,
                                           boolean useRegex)

A private method to create the where clause in the select statement

Parameters:

useRegex -

Returns:

returnReaderMatch

public static java.lang.String returnReaderMatch(java.util.HashMap<java.lang.String,ReadZone> readzones,
                                                 boolean useRegex,
                                                 java.lang.String reader,
                                                 java.lang.Integer antenna)