Package com.github.javaparser.utils

Class Utils

java.lang.Object

com.github.javaparser.utils.Utils

public class Utils
extends Object

Any kind of utility.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EOL	Deprecated. New code should use LineSeparator.SYSTEM if referring to the current host system's line separator, else LineSeparator.CR or LineSeparator.LF or LineSeparator.CRLF if referring to a specific style of line separator.
static final String	SYSTEM_EOL	Deprecated. Renamed from EOL to make it explicit that we're using the system's line separator.

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static String	assertNonEmpty(String string)
static <T extends Number> T	assertNonNegative(T number)
static <T> T	assertNotNull(T o)
static <T extends Number> T	assertPositive(T number)
static String	camelCaseToScreaming(String input)
static String	capitalize(String s)	Capitalizes the first character in the string.
static String	decapitalize(String s)	Lower-cases the first character in the string.
static String	escapeEndOfLines(String string)
static boolean	hasUnaryMinusAsParent(Node n)	Checks, if the parent is a unary expression with a minus operator.
static StringBuilder	indent(StringBuilder builder, int indentLevel)	Make an indent by appending indentLevel tab characters to the builder.
static <E> int	indexOfElementByObjectIdentity(List<E> list, E o)	Like List.indexOf(Object), but using ==, not equals.
static <E> boolean	isNullOrEmpty(Collection<E> collection)
static String	nextWord(String string)	Return the next word of the string, in other words it stops when a space is encountered.
static String	normalizeEolInTextBlock(String content, LineSeparator desiredEndOfLineCharacter)
static String	normalizeEolInTextBlock(String content, String desiredEndOfLineCharacter)
static String	readerToString(Reader reader)
static <E> void	removeElementByObjectIdentity(List<E> list, E o)	Like List.remove(Object), but using ==, not equals.
static String	removeFileExtension(String filename)
static <E> void	replaceElementByObjectIdentity(List<E> list, E oldObject, E newObject)	Like List.set(int, Object) at List.indexOf(Object), but using ==, not equals.
static String	screamingToCamelCase(String original)	Transform a string to the camel case conversion.
static <T> Set<T>	set(T... items)
private static String	stringTransformer(String s, String operationDescription, Function<String,String> transformation)
static String	toCamelCase(String original)	Deprecated. use screamingToCamelCase
static String	trimTrailingSpaces(String line)	Like String.trim(), but only the trailing spaces.
static boolean	valueIsNullOrEmpty(Object value)
static boolean	valueIsNullOrEmptyStringOrOptional(Object value)

Methods inherited from class java.lang.Object

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

Field Details

EOL

@Deprecated
public static final String EOL

Deprecated.

New code should use LineSeparator.SYSTEM if referring to the current host system's line separator, else LineSeparator.CR or LineSeparator.LF or LineSeparator.CRLF if referring to a specific style of line separator.

// TODO: Replace this within the internal codebase.

SYSTEM_EOL

@Deprecated
public static final String SYSTEM_EOL

Deprecated.

Renamed from EOL to make it explicit that we're using the system's line separator. New code should use LineSeparator.SYSTEM if referring to the current host system's line separator, else LineSeparator.CR or LineSeparator.LF or LineSeparator.CRLF if referring to a specific style of line separator.

Constructor Details

Utils

public Utils()

Method Details

isNullOrEmpty

public static <E> boolean isNullOrEmpty(Collection<E> collection)

assertNotNull

public static <T> T assertNotNull(T o)

assertNonEmpty

public static String assertNonEmpty(String string)

assertNonNegative

public static <T extends Number> T assertNonNegative(T number)

assertPositive

public static <T extends Number> T assertPositive(T number)

escapeEndOfLines

public static String escapeEndOfLines(String string)

Returns:

string with ASCII characters 10 and 13 replaced by the text "\n" and "\r".

readerToString

public static String readerToString(Reader reader)
                             throws IOException

Throws:

IOException

toCamelCase

@Deprecated
public static String toCamelCase(String original)

Deprecated.

use screamingToCamelCase

screamingToCamelCase

public static String screamingToCamelCase(String original)

Transform a string to the camel case conversion.

For example "ABC_DEF" becomes "abcDef"

camelCaseToScreaming

public static String camelCaseToScreaming(String input)

Parameters:

input - "aCamelCaseString"

Returns:

"A_CAMEL_CASE_STRING"

nextWord

public static String nextWord(String string)

Return the next word of the string, in other words it stops when a space is encountered.

indent

public static StringBuilder indent(StringBuilder builder,
 int indentLevel)

Make an indent by appending indentLevel tab characters to the builder.

capitalize

public static String capitalize(String s)

Capitalizes the first character in the string.

decapitalize

public static String decapitalize(String s)

Lower-cases the first character in the string.

stringTransformer

private static String stringTransformer(String s,
 String operationDescription,
 Function<String,String> transformation)

valueIsNullOrEmpty

public static boolean valueIsNullOrEmpty(Object value)

Returns:

true if the value is null, an empty Optional, or an empty String.

valueIsNullOrEmptyStringOrOptional

public static boolean valueIsNullOrEmptyStringOrOptional(Object value)

replaceElementByObjectIdentity

public static <E> void replaceElementByObjectIdentity(List<E> list,
 E oldObject,
 E newObject)

Like List.set(int, Object) at List.indexOf(Object), but using ==, not equals.

removeElementByObjectIdentity

public static <E> void removeElementByObjectIdentity(List<E> list,
 E o)

Like List.remove(Object), but using ==, not equals.

indexOfElementByObjectIdentity

public static <E> int indexOfElementByObjectIdentity(List<E> list,
 E o)

Like List.indexOf(Object), but using ==, not equals.

set

@SafeVarargs
public static <T> Set<T> set(T... items)

Returns:

a set of the items.

normalizeEolInTextBlock

public static String normalizeEolInTextBlock(String content,
 String desiredEndOfLineCharacter)

Returns:

content, with all kinds of EOL characters replaced by desiredEndOfLineCharacter

normalizeEolInTextBlock

public static String normalizeEolInTextBlock(String content,
 LineSeparator desiredEndOfLineCharacter)

Returns:

content, with all kinds of EOL characters replaced by desiredEndOfLineCharacter

removeFileExtension

public static String removeFileExtension(String filename)

Returns:

the filename with the last "." and everything following it removed.

trimTrailingSpaces

public static String trimTrailingSpaces(String line)

Like String.trim(), but only the trailing spaces.

hasUnaryMinusAsParent

public static boolean hasUnaryMinusAsParent(Node n)

Checks, if the parent is a unary expression with a minus operator. Used to check for negative literals.