Package eu.bandm.tools.util.java

Class Identifiers

java.lang.Object

eu.bandm.tools.util.java.Identifiers

public class Identifiers
extends Object

Auxiliary methods for identifiers.

Since:

1.3

Field Summary

Fields

Modifier and Type	Field	Description
static final Set<String>	contextualKeyWords	All Java contextual keywords according to Java language specification 2.2, section 3.9.
static final Set<String>	reservedKeyWords	All Java reserved keywords according to Java language specification 2.2, section 3.9.

Method Summary

Modifier and Type	Method	Description
static @Opt PreMessage	hasValidIdentifierStructure(String identifier)	Return whether the given string has the structure of a a valid Java identifier.
static @Opt PreMessage	isValidIdentifier(String identifier)	Return whether the given string is a valid Java identifier.
static @Opt PreMessage	isValidIdentifierAndNoKeyword(String identifier)	Return whether the given string is a valid java identifier and additionally not a contextual keyword.

Methods inherited from class java.lang.Object

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

Field Details

reservedKeyWords

public static final Set<String> reservedKeyWords

All Java reserved keywords according to Java language specification 2.2, section 3.9.

contextualKeyWords

public static final Set<String> contextualKeyWords

All Java contextual keywords according to Java language specification 2.2, section 3.9.

Method Details

hasValidIdentifierStructure

@Opt
public static @Opt PreMessage hasValidIdentifierStructure(String identifier)

Return whether the given string has the structure of a a valid Java identifier. This is determined according to the Java language specification 2.2, sections 3.8, not considerung the requirment of not being a reserved word.

This implementation uses Character.isJavaIdentifierStart(char) and Character.isJavaIdentifierPart(char).

Parameters:

identifier - to test

Returns:

an error message or null on success

See Also:

• isValidIdentifier(java.lang.String)

isValidIdentifier

@Opt
public static @Opt PreMessage isValidIdentifier(String identifier)

Return whether the given string is a valid Java identifier. This is determined according to the Java language specification 2.2, sections 3.8 and 3.9: Return whether the identifier is accepted by hasValidIdentifierStructure(java.lang.String) and is not a reserved word.

Parameters:

identifier - to test

Returns:

an error message or null on success

isValidIdentifierAndNoKeyword

@Opt
public static @Opt PreMessage isValidIdentifierAndNoKeyword(String identifier)

Return whether the given string is a valid java identifier and additionally not a contextual keyword. This is determined according to the Java language specification 2.2, sections 3.8 and 3.9. Returns whether isValidIdentifier(String) accepts the identifier, and it is not contained in contextualKeyWords.

Parameters:

identifier - to test

Returns:

an error message or null on success