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Class librarian.LeaTranslator

java.lang.Object
   |
   +----librarian.LeaTranslator

public class LeaTranslator

extends Object

implements constants

currentLineType

The type of the last line can be found here

currentMove

The last successfully read move can be found here

EMPTY

A constant indicating that an empty line has been read

EOF

A constant indicating that the end of the file has been reached

MOVE

A constant indicating that a move has been successfully read

LeaTranslator(String)

Readies the translator for use by reading the keywords from a file found at a URL supplied as a string.

lookupTypecode(char)

Converts one of the letters R, P, L, H, I, C, A into the corresponding internal code for an object subtype returned.

nextItem()

Reads the next token, establishes and returns its type and wraps it into an object which is stored at

nextLine()

Reads the next line and tries to convert it to a

setStream(Reader)

Initialization for reading a LEA program from a given stream of characters

 public EuMove currentMove

The last successfully read move can be found here

 public int currentLineType

The type of the last line can be found here

 public static final int EMPTY

A constant indicating that an empty line has been read

 public static final int MOVE

A constant indicating that a move has been successfully read

 public static final int EOF

A constant indicating that the end of the file has been reached

 public LeaTranslator(String dataUrl) throws LeaInternalException

Readies the translator for use by reading the keywords from a file found at a URL supplied as a string. The file is expected to contain one keyword per line, starting with the beacons and ending with the LEA commands. the two are separated by a line containing the word 'END_BEACON'

Parameters:

dataUrl - the place to find the keywords

 public void setStream(Reader inputs)

Initialization for reading a LEA program from a given stream of characters

Parameters:

inputs - the character stream

 public int nextItem() throws LibrarianException, LeaSyntaxException

Reads the next token, establishes and returns its type and wraps it into an object which is stored at @see currentFind. the type is also stored at @see currentType for internal use

Returns:

one of @see OBJECT, @see COMMAND, @see BEACON, @see ARGUMENT ,@see EOL

Throws: LibrarianException,

LeaSyntaxException

 public int nextLine() throws LeaSyntaxException, LeaInternalException, LibrarianException

Reads the next line and tries to convert it to a @see EuMove. Throws @LeaSyntaxException if not successful, unless the line contains only whitespace and comment. In this case, null is returned.

Returns:

one of @see EMPTY, @see MOVE, @see EOF

Throws: LibrarianException,

LeaSyntaxException, LeaInternalException

 public int lookupTypecode(char c)

Converts one of the letters R, P, L, H, I, C, A into the corresponding internal code for an object subtype returned.

Returns:

one of $see A_RADIUS, @see A_POINT, @see LINE, @see A_HALF, @see AN_INTERVAL @see A_CIRCLE, @see AN_ARC; or zero if the letter is not one of those listed above

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