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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK 11g Release 2 (11.1.2.3.0) E17493-04 |
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java.lang.Object
oracle.javatools.parser.generic.Language
public abstract class Language
The Language
interface provides methods for providing basic details of a language, such as the keywords, the comment delimiters, and the quote delimiters of a language. This is intended to provide clients with the ability to obtain a simple lexer implementation for a language without a lot of language-specific implementation details.
Clients that require more language-specific features or details will need to implement their own custom Lexer
to accommodate the unique features of a given language.
The GenericLexer
implementation is a concrete Lexer
that was written for this Language
API, can be used to instantiate a Lexer
for a given Language
implementation.
Field Summary | |
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protected BraceHelper |
braceHelper |
static java.lang.String[] |
EMPTY_ARRAY Empty String array, useful when a language feature is not available. |
protected KeywordTable |
keywordTable Stores a keyword table, containing all of the keywords of this language. |
Fields inherited from interface oracle.javatools.parser.generic.GenericTokens |
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TK_CLOSE_BRACE, TK_FLOAT, TK_IDENTIFIER, TK_INTEGER, TK_KEYWORD, TK_MULTI_COMMENT, TK_OPEN_BRACE, TK_OPERATOR, TK_QUOTES, TK_SINGLE_COMMENT |
Constructor Summary | |
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protected |
Language() Initializes the base Language abstract implementation. |
Method Summary | |
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BraceHelper |
getBraceHelper() Fetches a brace helper for this language that has useful routines for a brace matching implementation. |
abstract java.lang.String[][] |
getBraces() Fetches an array of String arrays, each of which represent a pair of matched braces. |
abstract java.lang.String[] |
getHexadecimals() Fetches an array of prefix used to start a hexadecimal integer literal if the language supports integer literals. |
abstract java.lang.String[] |
getKeywords() Fetches an array of the keywords in this language. |
protected KeywordTable |
getKeywordTable() Returns a KeywordTable for this language, based on the keywords supported, and whether the language is case-sensitive or not. |
abstract java.lang.String[][] |
getMultiLineComments() Fetches an array of String arrays, each of which represents a multi-line comment. |
abstract java.lang.String[] |
getOctals() Fetches an array of prefixes used to start an octal integer literal if the language supports integer literals. |
java.lang.String[] |
getOperators() Fetches an array of Strings, each of which represent an operator in the given language. |
abstract java.lang.String[][] |
getQuotes() Fetches an array of String arrays, each of which represents a type of quote. |
abstract java.lang.String[] |
getSingleLineComments() Fetches an array of Strings, each of which can be used to start a single-lined comment in this language. |
abstract boolean |
isCaseSensitive() Fetches whether this language (i.e., keywords) is case sensitive or not. |
abstract boolean |
isIdentifierCharacter(char c) Fetches whether the specified character can be part of an identifier (or keyword.) Consecutive sequence of characters, all of which return true for isIdentifierCharacter(), that do not match a keyword will generate a TK_IDENTIFIER token by the GenericLexer (assuming if course that those characters are not contained in a comment or string literal.) |
abstract boolean |
usesFloats() Fetches whether this language has floating point literals. |
abstract boolean |
usesIntegers() Fetches whether the language has integer literals. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected KeywordTable keywordTable
protected BraceHelper braceHelper
public static final java.lang.String[] EMPTY_ARRAY
Constructor Detail |
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protected Language()
Language
abstract implementation.Method Detail |
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public abstract boolean isCaseSensitive()
public abstract boolean isIdentifierCharacter(char c)
TK_IDENTIFIER
token by the GenericLexer
(assuming if course that those characters are not contained in a comment or string literal.)c
- the character to checkpublic abstract java.lang.String[] getKeywords()
protected KeywordTable getKeywordTable()
KeywordTable
for this language, based on the keywords supported, and whether the language is case-sensitive or not.KeywordTable
for this languagepublic abstract java.lang.String[] getSingleLineComments()
public abstract java.lang.String[][] getMultiLineComments()
public abstract java.lang.String[][] getQuotes()
public abstract java.lang.String[][] getBraces()
public java.lang.String[] getOperators()
public abstract boolean usesIntegers()
public abstract boolean usesFloats()
public abstract java.lang.String[] getOctals()
public abstract java.lang.String[] getHexadecimals()
public BraceHelper getBraceHelper()
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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK 11g Release 2 (11.1.2.3.0) E17493-04 |
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