io.rapidpro.expressions.utils

Class ExpressionUtils

java.lang.Object

io.rapidpro.expressions.utils.ExpressionUtils

public final class ExpressionUtils
extends Object

Utility methods

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.threeten.bp.format.DateTimeFormatter	JSON_DATETIME_FORMAT

Method Summary

Modifier and Type	Method and Description
static BigDecimal	decimalPow(BigDecimal number, BigDecimal power) Pow for two decimals
static String	formatJsonDate(org.threeten.bp.Instant value) Formats a time instant as ISO8601 in UTC with millisecond precision, e.g.
static org.threeten.bp.format.DateTimeFormatter	getDateFormatter(DateStyle dateStyle, boolean incTime) Gets a formatter for dates or datetimes
static <K,V> V	getOrDefault(Map<K,V> map, K key, V defaultValue) Replacement for Java 8's Map#getOrDefault(String, Object)
static org.threeten.bp.Instant	parseJsonDate(String value) Parses an ISO8601 formatted time instant from a string value
static <T> List<T>	slice(List<T> list, Integer start, Integer stop) Slices a list, Python style
static String[]	tokenize(String text) Tokenizes a string by splitting on non-word characters.
static String	urlquote(String text) Encodes text for inclusion in a URL query string.

Methods inherited from class java.lang.Object

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

Field Detail

JSON_DATETIME_FORMAT

protected static org.threeten.bp.format.DateTimeFormatter JSON_DATETIME_FORMAT

Method Detail

slice

public static <T> List<T> slice(List<T> list,
                                Integer start,
                                Integer stop)

Slices a list, Python style

Parameters:

list - the list

start - the start index (null means the beginning of the list)

stop - the stop index (null means the end of the list)

Returns:

the slice

decimalPow

public static BigDecimal decimalPow(BigDecimal number,
                                    BigDecimal power)

Pow for two decimals

urlquote

public static String urlquote(String text)

Encodes text for inclusion in a URL query string. Should be equivalent to Django's urlquote function.

Parameters:

text - the text to encode

Returns:

the encoded text

getDateFormatter

public static org.threeten.bp.format.DateTimeFormatter getDateFormatter(DateStyle dateStyle,
                                                                        boolean incTime)

Gets a formatter for dates or datetimes

Parameters:

dateStyle - whether parsing should be day-first or month-first

incTime - whether to include time

Returns:

the formatter

getOrDefault

public static <K,V> V getOrDefault(Map<K,V> map,
                                   K key,
                                   V defaultValue)

Replacement for Java 8's Map#getOrDefault(String, Object)

tokenize

public static String[] tokenize(String text)

Tokenizes a string by splitting on non-word characters. This should be equivalent to splitting on \W+ in Python. The meaning of \W is different in Android, Java 7, Java 8 hence the non-use of regular expressions.

Parameters:

text - the input text

Returns:

the string tokens

formatJsonDate

public static String formatJsonDate(org.threeten.bp.Instant value)

Formats a time instant as ISO8601 in UTC with millisecond precision, e.g. "2014-10-03T09:41:12.790Z"

parseJsonDate

public static org.threeten.bp.Instant parseJsonDate(String value)

Parses an ISO8601 formatted time instant from a string value