| java.io.PushbackInputStream
 org.w3c.tools.sexpr.SimpleSExprStream
| Method Summary | |
| public SExprParser | addParser(char key, SExprParser parser)
Associates a dispatch character with a parser in the read table. | | public boolean | getListsAsVectors()
Checks whether lists should be parsed as Vectors or Cons cells. | | public Readtable | getReadtable()
Accesses the read table of the parser. | | public StringBuffer | getScratchBuffer()
Accesses an empty string buffer available temporary storage.
This buffer can be used by sub-parsers as a scratch area. | | public Dictionary | getSymbols()
Accesses the symbol table of the parser. | | protected boolean | isAtomChar(char c, boolean first)
Predicate function for checking if a chahracter can belong to an atom. | | public static void | main(String args)
| | protected Number | makeNumber(String s)
Attempts to parse a number from the string. | | public Object | parse()
Parses a single object from the underlying input stream. | | public Object | parse(char c, SExprStream stream)
Parses a single object started by the character c. | | protected Object | parseAtom(char c)
Parses an atom (a number or a symbol).
Since anything that is not a number is a symbol, syntax errors are not
possible.
exception:
SExprParserException - not signalled but useful for the protocol
exception:
IOException - if an I/O problem occurred (e.g. | | protected Cons | parseList()
Parses a list (as Cons cells) sans first character. | | public String | parseString()
Parses a double-quote -delimited string (sans the first character).
Please note: no escape-character interpretation is performed. | | protected Vector | parseVector(Vector vector, char delimiter)
Parses a list (as a Vector) sans first character. | | public static void | printExpr(Object expr, PrintStream out)
Produces a printed representation of an s-expression. | | public char | readSkipWhite()
Reads from the stream, skipping whitespace and comments. | | public boolean | setListsAsVectors(boolean listsAsVectors)
Controls whether lists are represented as Vectors or Cons cells. | | public Readtable | setReadtable(Readtable readtable)
Assigns a new read table to the parser. | | public Dictionary | setSymbols(Dictionary symbols)
Assigns a symbol table to the parser. |
| SimpleSExprStream | | public SimpleSExprStream(InputStream input)(Code) | | Initializes the parser with no read table and no symbol table assigned.
Parsed lists will be represented as Cons cells.
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| getListsAsVectors | | public boolean getListsAsVectors()(Code) | | Checks whether lists should be parsed as Vectors or Cons cells.
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| getReadtable | | public Readtable getReadtable()(Code) | | Accesses the read table of the parser.
If no read table has been assigned, creates an empty table.
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| getScratchBuffer | | public StringBuffer getScratchBuffer()(Code) | | Accesses an empty string buffer available temporary storage.
This buffer can be used by sub-parsers as a scratch area. Please note
that the buffer is not guarded in any way, so multithreaded and reentrant
programs must worry about this themselves.
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| getSymbols | | public Dictionary getSymbols()(Code) | | Accesses the symbol table of the parser.
If no symbol table has been assigned, creates an empty table.
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| isAtomChar | | protected boolean isAtomChar(char c, boolean first)(Code) | | Predicate function for checking if a chahracter can belong to an atom.
Parameters:
first - if true means that c is the first character of the atom |
| parseString | | public String parseString() throws SExprParserException, IOException(Code) | | Parses a double-quote -delimited string (sans the first character).
Please note: no escape-character interpretation is performed. Override
this method for any escape character handling.
exception:
SExprParserException - not signalled but useful for the protocol
exception:
IOException - any I/O problem (including end of file) |
| parseVector | | protected Vector parseVector(Vector vector, char delimiter) throws SExprParserException, IOException(Code) | | Parses a list (as a Vector) sans first character.
In order to parse list-like structures delimited by other characters
than parentheses, the delimiting (ending) character has to be provided.
exception:
SExprParserException - if syntax error was detected
exception:
IOException - if any other I/O-related problem occurred |
| printExpr | | public static void printExpr(Object expr, PrintStream out)(Code) | | Produces a printed representation of an s-expression.
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| readSkipWhite | | public char readSkipWhite() throws IOException(Code) | | Reads from the stream, skipping whitespace and comments.
exception:
IOException - if an I/O problem occurred (including end of file) |
| setListsAsVectors | | public boolean setListsAsVectors(boolean listsAsVectors)(Code) | | Controls whether lists are represented as Vectors or Cons cells.
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| setSymbols | | public Dictionary setSymbols(Dictionary symbols)(Code) | | Assigns a symbol table to the parser.
Assigning null will prevent an empty symbol table to be created
in the future.
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