tsdb.util

Class Util

java.lang.Object

tsdb.util.Util

public final class Util
extends java.lang.Object

Some utilities

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Util.FloatRange named range of float values

Field Summary

Fields

Modifier and Type	Field and Description
static java.nio.charset.Charset	CHARSET_UTF_8
static Logger	log Default logger

Method Summary

Modifier and Type	Method and Description
static <T> T[]	addEntryToArray(T[] array, T e) Concatenates an array and an element and returns the new array
static java.lang.Float[]	array_float_to_array_Float(float[] a)
static java.lang.String	arrayToString(double[] a)
static java.lang.String	arrayToString(float[] a)
static java.lang.String	arrayToString(int[] array)
static java.lang.String	arrayToString(java.lang.String[] array)
static <T> java.lang.String	arrayToString(T[] a)
static java.lang.String	arrayToStringNullable(java.lang.String[] a) transforms an array of strings to string with removed null elements.
static java.lang.String	bigNumberToString(long n)
static java.lang.String	bytesToHex(byte[] bytes) convert byte values to hex text
static java.lang.String[]	concat(java.lang.String[] array, java.lang.String lastEntry)
static boolean	containsOneString(java.lang.String[] array, java.lang.String[] texts) checks if at least one text is contained in array
static boolean	containsString(java.lang.String[] array, java.lang.String text) check if text is contained in array
static void	createDirectoriesOfFile(java.lang.String filepath)
static <T> java.util.List<T>	createList(java.util.List<T> list, T e)
static java.lang.String	doubleToString(double value)
static java.lang.String	doubleToString0(double value)
static java.lang.String	doubleToString1(double value)
static java.lang.String	doubleToString2(double value)
static java.lang.String	doubleToString3(double value)
static java.lang.String	doubleToString4(double value)
static java.lang.String	doubleToStringFull(double value)
static boolean	empty(java.lang.Object[] array)
static char[]	fastWriteFloat(float v)
static <S,T> int	fillArray(java.util.Collection<S> collection, T[] array, java.util.function.Function<S,T> transform)
static <T> int	fillArray(java.util.Collection<T> collection, T[] array)
static <S,T> int	fillArray(java.util.Iterator<S> input_iterator, T[] array, java.util.function.Function<S,T> transform)
static <T> int	fillArray(java.util.Iterator<T> input_iterator, T[] array)
static java.lang.String	floatToString(float value) convert float to String with two fractional digits
static java.lang.String	floatToString0(float value)
static java.util.TreeSet<java.lang.String>	getDuplicateNames(java.lang.String[] schema, boolean ignorNull)
static int	getIndexInArray(java.lang.String text, java.lang.String[] array)
static java.lang.String[]	getValidEntries(java.lang.String[] names, java.lang.String[] source)
static java.lang.String	ifNaN(double value, java.lang.String text)
static java.lang.String	ifNaN(float value, java.lang.String text)
static <A,B> B	ifnull(A a, java.util.function.Function<A,B> func) return result of func if a is not null else null
static <A,B> B	ifnull(A a, java.util.function.Function<A,B> funcArg, java.util.function.Supplier<B> funcNull) return result of funcArg if a is not null else result of funcNull
static <T> T	ifnull(T a, T isNull)
static <A,B> B	ifnullval(A a, java.util.function.Function<A,B> funcArg, B nullValue)
static boolean	isContained(java.lang.String[] names, java.lang.String[] source)
static <T> java.util.ArrayList<T>	iteratorToList(java.util.Iterator<T> it)
static java.lang.String	msToText(long start, long end)
static boolean	notNull(java.lang.Object e)
static void	printArray(double[] a) print array of values in one line
static void	printArray(float[] a)
static void	printArray(java.lang.String[] a)
static void	printArray(java.lang.String[] a, java.lang.String sep) print array of values in one line
static java.util.List<Util.FloatRange>	readIniSectionFloatRange(java.lang.String fileName, java.lang.String sectionName) Reads a list of range float values from ini-file section
static java.util.Map<java.lang.String,java.lang.String>	readIniSectionMap(Section section) creates a map of all entries in one section of an "ini"-file
static java.lang.String	removeComments(byte[] data) remove block comments from data.
static <T> java.util.ArrayList<T>	streamToList(java.util.stream.Stream<T> stream)
static java.util.Map<java.lang.String,java.lang.Integer>	stringArrayToMap(java.lang.String[] entries)
static java.util.Map<java.lang.String,java.lang.Integer>	stringArrayToMap(java.lang.String[] entries, boolean ignoreNull) create position map of array of Strings: name -> array position
static int[]	stringArrayToPositionIndexArray(java.lang.String[] resultNames, java.util.Map<java.lang.String,java.lang.Integer> sourcePosStringMap, boolean warn, boolean exception) create an array of positions of entries in resultNames with positions of sourcePosStringMap
static int[]	stringArrayToPositionIndexArray(java.lang.String[] resultNames, java.lang.String[] sourcePosStringArray, boolean warn, boolean exception) create an array of positions of entries in resultNames with positions of sourcePosStringArray
static java.lang.String[]	toArray(java.lang.String e)

Methods inherited from class java.lang.Object

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

Field Detail

CHARSET_UTF_8

public static final java.nio.charset.Charset CHARSET_UTF_8

log

public static final Logger log

Default logger

Method Detail

floatToString

public static java.lang.String floatToString(float value)

convert float to String with two fractional digits

Parameters:

value -

Returns:

floatToString0

public static java.lang.String floatToString0(float value)

doubleToString

public static java.lang.String doubleToString(double value)

doubleToString0

public static java.lang.String doubleToString0(double value)

doubleToString1

public static java.lang.String doubleToString1(double value)

doubleToString2

public static java.lang.String doubleToString2(double value)

doubleToString3

public static java.lang.String doubleToString3(double value)

doubleToString4

public static java.lang.String doubleToString4(double value)

doubleToStringFull

public static java.lang.String doubleToStringFull(double value)

stringArrayToMap

public static java.util.Map<java.lang.String,java.lang.Integer> stringArrayToMap(java.lang.String[] entries)

stringArrayToMap

public static java.util.Map<java.lang.String,java.lang.Integer> stringArrayToMap(java.lang.String[] entries,
                                                                                 boolean ignoreNull)

create position map of array of Strings: name -> array position

Parameters:

entries -

Returns:

stringArrayToPositionIndexArray

public static int[] stringArrayToPositionIndexArray(java.lang.String[] resultNames,
                                                    java.lang.String[] sourcePosStringArray,
                                                    boolean warn,
                                                    boolean exception)

create an array of positions of entries in resultNames with positions of sourcePosStringArray

Parameters:

resultNames -

sourcePosStringArray -

warn - warn if entry was not found in sourcePosStringArray

Returns:

stringArrayToPositionIndexArray

public static int[] stringArrayToPositionIndexArray(java.lang.String[] resultNames,
                                                    java.util.Map<java.lang.String,java.lang.Integer> sourcePosStringMap,
                                                    boolean warn,
                                                    boolean exception)

create an array of positions of entries in resultNames with positions of sourcePosStringMap

Parameters:

resultNames -

sourcePosStringMap -

warn - warn if entry was not found in sourcePosStringMap

Returns:

printArray

public static void printArray(double[] a)

print array of values in one line

Parameters:

a -

printArray

public static void printArray(float[] a)

arrayToString

public static java.lang.String arrayToString(float[] a)

arrayToString

public static java.lang.String arrayToString(double[] a)

arrayToString

public static <T> java.lang.String arrayToString(T[] a)

printArray

public static void printArray(java.lang.String[] a)

printArray

public static void printArray(java.lang.String[] a,
                              java.lang.String sep)

print array of values in one line

Parameters:

a -

readIniSectionFloatRange

public static java.util.List<Util.FloatRange> readIniSectionFloatRange(java.lang.String fileName,
                                                                       java.lang.String sectionName)

Reads a list of range float values from ini-file section

Parameters:

fileName -

sectionName -

Returns:

iteratorToList

public static <T> java.util.ArrayList<T> iteratorToList(java.util.Iterator<T> it)

createList

public static <T> java.util.List<T> createList(java.util.List<T> list,
                                               T e)

ifnull

public static <T> T ifnull(T a,
                           T isNull)

ifnull

public static <A,B> B ifnull(A a,
                             java.util.function.Function<A,B> func)

return result of func if a is not null else null

Parameters:

a -

func -

Returns:

ifnull

public static <A,B> B ifnull(A a,
                             java.util.function.Function<A,B> funcArg,
                             java.util.function.Supplier<B> funcNull)

return result of funcArg if a is not null else result of funcNull

Parameters:

a -

funcArg -

funcNull -

Returns:

ifnullval

public static <A,B> B ifnullval(A a,
                                java.util.function.Function<A,B> funcArg,
                                B nullValue)

bigNumberToString

public static java.lang.String bigNumberToString(long n)

getIndexInArray

public static int getIndexInArray(java.lang.String text,
                                  java.lang.String[] array)

fillArray

public static <S,T> int fillArray(java.util.Collection<S> collection,
                                  T[] array,
                                  java.util.function.Function<S,T> transform)

fillArray

public static <S,T> int fillArray(java.util.Iterator<S> input_iterator,
                                  T[] array,
                                  java.util.function.Function<S,T> transform)

fillArray

public static <T> int fillArray(java.util.Collection<T> collection,
                                T[] array)

fillArray

public static <T> int fillArray(java.util.Iterator<T> input_iterator,
                                T[] array)

array_float_to_array_Float

public static java.lang.Float[] array_float_to_array_Float(float[] a)

readIniSectionMap

public static java.util.Map<java.lang.String,java.lang.String> readIniSectionMap(Section section)

creates a map of all entries in one section of an "ini"-file

Parameters:

section -

Returns:

arrayToString

public static java.lang.String arrayToString(java.lang.String[] array)

Parameters:

array - nullable

Returns:

arrayToStringNullable

public static java.lang.String arrayToStringNullable(java.lang.String[] a)

transforms an array of strings to string with removed null elements.

Parameters:

a -

Returns:

arrayToString

public static java.lang.String arrayToString(int[] array)

getDuplicateNames

public static java.util.TreeSet<java.lang.String> getDuplicateNames(java.lang.String[] schema,
                                                                    boolean ignorNull)

ifNaN

public static java.lang.String ifNaN(float value,
                                     java.lang.String text)

ifNaN

public static java.lang.String ifNaN(double value,
                                     java.lang.String text)

containsString

public static boolean containsString(java.lang.String[] array,
                                     java.lang.String text)

check if text is contained in array

Parameters:

array -

text -

Returns:

containsOneString

public static boolean containsOneString(java.lang.String[] array,
                                        java.lang.String[] texts)

checks if at least one text is contained in array

Parameters:

array -

texts -

Returns:

concat

public static java.lang.String[] concat(java.lang.String[] array,
                                        java.lang.String lastEntry)

getValidEntries

public static java.lang.String[] getValidEntries(java.lang.String[] names,
                                                 java.lang.String[] source)

isContained

public static boolean isContained(java.lang.String[] names,
                                  java.lang.String[] source)

streamToList

public static <T> java.util.ArrayList<T> streamToList(java.util.stream.Stream<T> stream)

empty

public static boolean empty(java.lang.Object[] array)

toArray

public static java.lang.String[] toArray(java.lang.String e)

createDirectoriesOfFile

public static void createDirectoriesOfFile(java.lang.String filepath)

notNull

public static boolean notNull(java.lang.Object e)

msToText

public static java.lang.String msToText(long start,
                                        long end)

removeComments

public static java.lang.String removeComments(byte[] data)

remove block comments from data.

Parameters:

data - in UTF-8 with block comments

Returns:

converted String

addEntryToArray

public static <T> T[] addEntryToArray(T[] array,
                                      T e)

Concatenates an array and an element and returns the new array

Parameters:

array - may be null

e - may not be null if array is null to get type of new array

Returns:

new array

fastWriteFloat

public static char[] fastWriteFloat(float v)

bytesToHex

public static java.lang.String bytesToHex(byte[] bytes)

convert byte values to hex text

Parameters:

bytes -

Returns: