org.quasiliteral.syntax
Class FileFeeder

java.lang.Object
  |
  +--org.quasiliteral.syntax.FileFeeder

All Implemented Interfaces:

LineFeeder

public class FileFeeder

extends Object

implements LineFeeder

Untamed: A FileFeeder reads its input from a Reader which it assumes starts at the beginning of line 1 in the text unit (file?) described by the Url.

Author:

Mark S. Miller

Field Summary

private int	myLineNum
private TextWriter	myOptOuts
private BufferedReader	myOptReader
private String	myUrl

Constructor Summary

FileFeeder(String url, BufferedReader optReader, TextWriter optOuts)
Enabled:

Method Summary

Twine	optNextLine(boolean atTop, boolean quoted, int indent, char closer, int closeIndent) Enabled:
private String	prompt(boolean atTop, boolean quoted, int indent, char closer, int closeIndent)
String	toString() Suppressed:

Methods inherited from class java.lang.Object

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

Field Detail

myUrl

private final String myUrl

myLineNum

private int myLineNum

myOptReader

private BufferedReader myOptReader

myOptOuts

private final TextWriter myOptOuts

Constructor Detail

FileFeeder

public FileFeeder(String url,
                  BufferedReader optReader,
                  TextWriter optOuts)

Enabled:

Method Detail

toString

public String toString()

Suppressed:

Overrides:

toString in class Object

Returns:

a string representation of the object.

optNextLine

public Twine optNextLine(boolean atTop,
                         boolean quoted,
                         int indent,
                         char closer,
                         int closeIndent)
                  throws IOException

Enabled:

Specified by:

optNextLine in interface LineFeeder

Parameters:

atTop - Is this the beginning of a top-level unit (typically, a top-level expression)?

quoted - Will this next line be taken as literal text? If so, then it should not be trimmed or indented. 'quoted' is true between double quotes, or between quasi-quotes when not inside a $ or @ hole.

indent - The suggested indentation level for the next line, unless the next line begins with closer.

closer - The character that would close the most recent unclosed openner.

closeIndent - The suggested indentation level for the next line if it does begin (after trimming) with closer.

IOException

prompt

private String prompt(boolean atTop,
                      boolean quoted,
                      int indent,
                      char closer,
                      int closeIndent)