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
static int	count(String s, char x)
static String	escapeWhitespace(String s, boolean escapeSpaces)
static String	expandTabs(String s, int tabSize)
static <T> String	join(Iterator<T> iter, String separator)
static <T> String	join(T[] array, String separator)
static String	newlines(int n)
static int	numNonnull(Object[] data)
static char[]	readFile(String fileName)
static char[]	readFile(String fileName, String encoding)
static <T> void	removeAllElements(Collection<T> data, T value)
static String	sequence(int n, String s)
static String	spaces(int n)
static char[]	toCharArray(IntegerList data)
static Map<String,Integer>	toMap(String[] keys)	Convert array of strings to string→index map.
static IntervalSet	toSet(BitSet bits)
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 Detail

Utils

public Utils()

Method Detail

join

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

join

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

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(String fileName,
                             String content)
                      throws IOException

Throws:

IOException

writeFile

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

Throws:

IOException

readFile

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

Throws:

IOException

readFile

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

Throws:

IOException

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)

toSet

public static IntervalSet toSet(BitSet bits)

expandTabs

public static String expandTabs(String s,
                                int tabSize)

Since:

4.6

spaces

public static String spaces(int n)

Since:

4.6

newlines

public static String newlines(int n)

Since:

4.6

sequence

public static String sequence(int n,
                              String s)

Since:

4.6

count

public static int count(String s,
                        char x)

Since:

4.6