org.opennms.netmgt.measurements.utils

Class Utils

java.lang.Object

org.opennms.netmgt.measurements.utils.Utils

public class Utils
extends Object

Utility functions.

Author:

jwhite

Constructor Summary

Constructors

Constructor and Description
Utils()

Method Summary

Modifier and Type	Method and Description
static void	convertStringAttributesToConstants(String sourceLabel, Map<String,String> stringAttributes, Map<String,Object> fetchResultConstants) Converts constants stored in strings.properties to FetchResults constants.
static FetchResults	createEmtpyFetchResults(long step, Map<String,Object> constants)
static void	fillMissingValues(FetchResults fetchResults, List<Source> sources) Enrich the fetchResults with NaN values for all sources which do not have values in the fetchResults.
static Double	toDouble(Object o) Attempts to cast an arbitrary object to a Double.

Methods inherited from class java.lang.Object

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

Constructor Detail

Utils

public Utils()

Method Detail

toDouble

public static Double toDouble(Object o)

Attempts to cast an arbitrary object to a Double.

Throws:

NullPointerException - when o is null

NumberFormatException - when the cast fails

convertStringAttributesToConstants

public static void convertStringAttributesToConstants(String sourceLabel,
                                                      Map<String,String> stringAttributes,
                                                      Map<String,Object> fetchResultConstants)

Converts constants stored in strings.properties to FetchResults constants. Keys are prefix with the source label in order to avoid collisions. Values are converted to doubles when possible to allows the to be used by the ExpressionEngine.

fillMissingValues

public static void fillMissingValues(FetchResults fetchResults,
                                     List<Source> sources)

Enrich the fetchResults with NaN values for all sources which do not have values in the fetchResults.

Parameters:

fetchResults -

sources -

createEmtpyFetchResults

public static FetchResults createEmtpyFetchResults(long step,
                                                   Map<String,Object> constants)