Package org.antlr.v4.runtime.misc

Class Utils

java.lang.Object

org.antlr.v4.runtime.misc.Utils

public class Utils
extends Object

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
private static int	charArraySize(IntegerList data)
static boolean	equals(Object x, Object y)
static String	escapeWhitespace(String s, boolean escapeSpaces)
static String	join(Iterable<?> iter, String separator)
static <T> String	join(Iterator<T> iter, String separator)
static <T> String	join(T[] array, String separator)
static int	numNonnull(Object[] data)
static char[]	readFile(String fileName)
static char[]	readFile(String fileName, String encoding)
static <T> void	removeAll(Iterable<T> iterable, Predicate<? super T> predicate)
static <T> void	removeAll(List<T> list, Predicate<? super T> predicate)
static <T> void	removeAllElements(Collection<T> data, T value)
static char[]	toCharArray(IntegerList data)	Convert the list to a UTF-16 encoded char array.
static Map<String,Integer>	toMap(String[] keys)	Convert array of strings to string→index map.
static IntervalSet	toSet(BitSet bits)
static void	writeFile(File file, byte[] content)
static void	writeFile(String fileName, String content)
static void	writeFile(String fileName, String content, String encoding)

Methods inherited from class java.lang.Object

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

Constructor Details

Utils

public Utils()

Method Details

join

public static String join(Iterable<?> iter,
 String separator)

join

public static <T> String join(T[] array,
 String separator)

join

public static <T> String join(Iterator<T> iter,
 String separator)

equals

public static boolean equals(Object x,
 Object y)

numNonnull

public static int numNonnull(Object[] data)

removeAllElements

public static <T> void removeAllElements(Collection<T> data,
 T value)

escapeWhitespace

public static String escapeWhitespace(String s,
 boolean escapeSpaces)

writeFile

public static void writeFile(@NotNull
 File file,
 @NotNull
 byte[] content)
                      throws IOException

Throws:

IOException

writeFile

public static void writeFile(@NotNull
 String fileName,
 @NotNull
 String content)
                      throws IOException

Throws:

IOException

writeFile

public static void writeFile(@NotNull
 String fileName,
 @NotNull
 String content,
 @Nullable
 String encoding)
                      throws IOException

Throws:

IOException

readFile

@NotNull
public static char[] readFile(@NotNull
 String fileName)
                       throws IOException

Throws:

IOException

readFile

@NotNull
public static char[] readFile(@NotNull
 String fileName,
 @Nullable
 String encoding)
                       throws IOException

Throws:

IOException

removeAll

public static <T> void removeAll(@NotNull
 List<T> list,
 @NotNull
 Predicate<? super T> predicate)

removeAll

public static <T> void removeAll(@NotNull
 Iterable<T> iterable,
 @NotNull
 Predicate<? super T> predicate)

toMap

public static Map<String,Integer> toMap(String[] keys)

Convert array of strings to string→index map. Useful for converting rulenames to name→ruleindex map.

toCharArray

public static char[] toCharArray(IntegerList data)

Convert the list to a UTF-16 encoded char array. If all values are less than the 0xFFFF 16-bit code point limit then this is just a char array of 16-bit char as usual. For values in the supplementary range, encode them as two UTF-16 code units.

charArraySize

private static int charArraySize(IntegerList data)

toSet

@NotNull
public static IntervalSet toSet(@NotNull
 BitSet bits)

Since:

4.5