com.cloudera.oryx.common.text

Class TextUtils

java.lang.Object

com.cloudera.oryx.common.text.TextUtils

public final class TextUtils
extends Object

Text and parsing related utility methods.

Method Summary

Modifier and Type	Method and Description
static <T> T	convertViaJSON(Object value, Class<T> clazz)
static String	joinDelimited(Iterable<?> elements, char delimiter)
static String	joinJSON(Iterable<?> elements)
static String	joinPMMLDelimited(Iterable<?> elements)
static String	joinPMMLDelimitedNumbers(Iterable<? extends Number> elements)
static String[]	parseDelimited(String delimited, char delimiter)
static String[]	parseJSONArray(String json)
static String[]	parsePMMLDelimited(String delimited)
static <T> T	readJSON(String json, Class<T> clazz)

Methods inherited from class java.lang.Object

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

Method Detail

parseDelimited

public static String[] parseDelimited(String delimited,
                                      char delimiter)

Parameters:

delimited - line of delimited text

delimiter - delimiter to split fields on

Returns:

delimited strings, parsed according to RFC 4180 but with the given delimiter

parsePMMLDelimited

public static String[] parsePMMLDelimited(String delimited)

Parameters:

delimited - PMML-style space-delimited value string

Returns:

delimited values, parsed according to PMML rules

joinDelimited

public static String joinDelimited(Iterable<?> elements,
                                   char delimiter)

Parameters:

elements - values to join by the delimiter to make one line of text

delimiter - delimiter to put between fields

Returns:

one line of text, with RFC 4180 escaping (values with comma are quoted; double-quotes are escaped by doubling) and using the given delimiter

joinPMMLDelimited

public static String joinPMMLDelimited(Iterable<?> elements)

Parameters:

elements - values to join by space to make one line of text

Returns:

one line of text, formatted according to PMML quoting rules (\" instead of "" for escaping quotes; ignore space surrounding values

joinPMMLDelimitedNumbers

public static String joinPMMLDelimitedNumbers(Iterable<? extends Number> elements)

Parameters:

elements - numbers to join by space to make one line of text

Returns:

one line of text, formatted according to PMML quoting rules

parseJSONArray

public static String[] parseJSONArray(String json)
                               throws IOException

Parameters:

json - line of JSON text

Returns:

delimited strings, the elements of the JSON array

Throws:

IOException - if JSON parsing fails

joinJSON

public static String joinJSON(Iterable<?> elements)

Parameters:

elements - elements to be joined in a JSON string. May be any objects.

Returns:

JSON representation of the list of objects

readJSON

public static <T> T readJSON(String json,
                             Class<T> clazz)

Type Parameters:

T - type that should be parsed from JSON and returned

Parameters:

json - JSON string

clazz - Java type to interpret as

Returns:

the JSON string, parsed into the given type

convertViaJSON

public static <T> T convertViaJSON(Object value,
                                   Class<T> clazz)

Type Parameters:

T - type that should be parsed from JSON and returned

Parameters:

value - value to convert

clazz - desired type to interpret as

Returns:

the given value, reinterpreted as the given type, as if serialized/deserialized via JSON to perform the conversion