MetricUtility

public class MetricUtility
extends Object

java.lang.Object
↳	com.android.tradefed.util.MetricUtility

Contains common utility methods for storing the test metrics, aggregating the metrics in similar tests and writing the metrics to a file.

Summary

Public constructors
`MetricUtility()`

Public methods
	`aggregateMetrics( rawMetrics)` Aggregate comma separated metrics.
`File`	`aggregateStoredTestMetricsAndWriteToFile(String fileName)` Aggregate the metrics collected from multiple iterations of the test and write the aggregated metrics to a test result file.
`static`	`getStats( values, percentiles)` Compute the stats from the give list of values.
	`getStoredTestMetric()`
`static boolean`	`isAllDoubleValues( rawValues)` Return true is all the values can be parsed to double value.
`void`	`setIterationSeparator(String separator)`
`void`	`setPercentiles( percentiles)`
`void`	`storeTestMetrics(TestDescription testDescription, testMetrics)` Used for storing the individual test metrics and use it for aggregation.
`File`	`writeResultsToFile(String testFileSuffix, String testHeaderName, metrics, File resultsFile)` Write metrics to a file.

Public constructors

MetricUtility

public MetricUtility ()

Public methods

aggregateMetrics

public  aggregateMetrics ( rawMetrics)

Aggregate comma separated metrics.

Parameters
`rawMetrics`	: metrics collected during the test run.

Returns
	aggregated metrics.

aggregateStoredTestMetricsAndWriteToFile

public File aggregateStoredTestMetricsAndWriteToFile (String fileName)

Aggregate the metrics collected from multiple iterations of the test and write the aggregated metrics to a test result file.

Parameters
`fileName`	`String`: file name to use while writing the metrics.

Returns
`File`

getStats

public static  getStats ( values, 
                 percentiles)

Compute the stats from the give list of values.

Parameters
`values`	: raw values to compute the aggregation.
`percentiles`	: stats to include in the final metrics.

Returns
	aggregated values.

getStoredTestMetric

public  getStoredTestMetric ()

Returns

isAllDoubleValues

public static boolean isAllDoubleValues ( rawValues)

Return true is all the values can be parsed to double value. Otherwise return false.

Parameters
`rawValues`	: list whose values are validated.

Returns
`boolean`

setIterationSeparator

public void setIterationSeparator (String separator)

Parameters
`separator`	`String`

setPercentiles

public void setPercentiles ( percentiles)

Parameters
`percentiles`

storeTestMetrics

public void storeTestMetrics (TestDescription testDescription, 
                 testMetrics)

Used for storing the individual test metrics and use it for aggregation.

Parameters
`testDescription`	`TestDescription`: contains the test details like class name and test name.
`testMetrics`	: metrics collected for the test.

writeResultsToFile

public File writeResultsToFile (String testFileSuffix, 
                String testHeaderName, 
                 metrics, 
                File resultsFile)

Write metrics to a file.

Parameters
`testFileSuffix`	`String`: is used as suffix in the test metric file name.
`testHeaderName`	`String`: metrics will be written under the test header name.
`metrics`	: to write in the file.
`resultsFile`	`File`: if null create a new file and write the metrics otherwise append the test header name and metric to the file.

Returns
`File`	file with the metric.