org.antlr.v4.misc

Class Utils

java.lang.Object

org.antlr.v4.misc.Utils

public class Utils
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Utils.Filter<T>
static interface	Utils.Func0<TResult>
static interface	Utils.Func1<T1,TResult>

Field Summary

Fields

Modifier and Type	Field and Description
static int	INTEGER_POOL_MAX_VALUE

Constructor Summary

Constructors

Constructor and Description
Utils()

Method Summary

Methods

Modifier and Type	Method and Description
static String	capitalize(String s)
static String	decapitalize(String s)
static <T> T	find(List<?> ops, Class<T> cl) Find exact object type or sublass of cl in list
static <T> int	indexOf(List<? extends T> elems, Utils.Filter<T> filter)
static String	join(Object[] a, String separator)
static <T> int	lastIndexOf(List<? extends T> elems, Utils.Filter<T> filter)
static <T extends GrammarAST> List<String>	nodesToStrings(List<T> nodes)
static <From,To> List<To>	select(List<From> list, Utils.Func1<From,To> selector) apply methodName to list and return list of results.
static void	setSize(List<?> list, int size)
static String	sortLinesInString(String s)
static String	stripFileExtension(String name) Integer objects are immutable so share all Integers with the same value up to some max size.

Methods inherited from class java.lang.Object

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

Field Detail

INTEGER_POOL_MAX_VALUE

public static final int INTEGER_POOL_MAX_VALUE

See Also:

Constant Field Values

Constructor Detail

Utils

public Utils()

Method Detail

stripFileExtension

public static String stripFileExtension(String name)

Integer objects are immutable so share all Integers with the same value up to some max size. Use an array as a perfect hash. Return shared object for 0..INTEGER_POOL_MAX_VALUE or a new Integer object with x in it. Java's autoboxing only caches up to 127. public static Integer integer(int x) { if ( x<0 || x>INTEGER_POOL_MAX_VALUE ) { return new Integer(x); } if ( ints[x]==null ) { ints[x] = new Integer(x); } return ints[x]; }

join

public static String join(Object[] a,
          String separator)

sortLinesInString

public static String sortLinesInString(String s)

nodesToStrings

public static <T extends GrammarAST> List<String> nodesToStrings(List<T> nodes)

capitalize

public static String capitalize(String s)

decapitalize

public static String decapitalize(String s)

select

public static <From,To> List<To> select(List<From> list,
                        Utils.Func1<From,To> selector)

apply methodName to list and return list of results. method has no args. This pulls data out of a list essentially.

find

public static <T> T find(List<?> ops,
         Class<T> cl)

Find exact object type or sublass of cl in list

indexOf

public static <T> int indexOf(List<? extends T> elems,
              Utils.Filter<T> filter)

lastIndexOf

public static <T> int lastIndexOf(List<? extends T> elems,
                  Utils.Filter<T> filter)

setSize

public static void setSize(List<?> list,
           int size)