io.rapidpro.expressions.utils

Class ExpressionUtils

java.lang.Object

io.rapidpro.expressions.utils.ExpressionUtils

public class ExpressionUtils
extends Object

Utility methods

Constructor Summary

Constructors

Constructor and Description
ExpressionUtils()

Method Summary

Modifier and Type	Method and Description
static BigDecimal	decimalPow(BigDecimal number, BigDecimal power) Pow for two decimals
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 <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

Constructor Detail

ExpressionUtils

public ExpressionUtils()

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