Class Reader

java.lang.Object
  structure.AbstractIterator
      Reader

All Implemented Interfaces:

java.util.Enumeration, java.util.Iterator

public class Reader

extends structure.AbstractIterator

A simple input stream that parses postscript files and generates a stream of Tokens. By default, the stream is constructed from a structure.ReadStream, but the Reader may also be constructed to read from a List. This allows the recursive implementation of procedures.

Constructor Summary

Reader()
Constructs a Reader that reads from the default input stream.

Reader(structure.List l)
Constructs a Reader that reads tokens from a List.

Reader(Token t)
Constructs a Reader that reads from a single Token.

Method Summary

java.lang.Object	get() Not yet implemented.
boolean	hasNext() Check for more tokens on input stream.
static void	main(java.lang.String[] args) A sample method that reads tokens from a Reader and prints their value to the console.
java.lang.Object	next() If hasNext() returns the next token from the input stream.
void	reset() If this is a list, resets the reader back to the beginning.

Methods inherited from class structure.AbstractIterator

hasMoreElements, nextElement, remove, value

Methods inherited from class java.lang.Object

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

Constructor Detail

Reader

public Reader()

Constructs a Reader that reads from the default input stream.

Reader

public Reader(structure.List l)

Constructs a Reader that reads tokens from a List.

Parameters:

l - a List containing the tokens to be read.

Reader

public Reader(Token t)

Constructs a Reader that reads from a single Token. If the token is a procedure, the tokens are read from the associated list, otherwise a trivial stream is constructed that contains the single token.

Parameters:

t - the source of the token stream

Method Detail

hasNext

public boolean hasNext()

Check for more tokens on input stream.

Returns:

true iff there are more unprocessed tokens on stream.

get

public java.lang.Object get()

Not yet implemented.

reset

public void reset()

If this is a list, resets the reader back to the beginning. Tokens will be re-read.

next

public java.lang.Object next()

If hasNext() returns the next token from the input stream.

Returns:

the next token read from the stream.

main

public static void main(java.lang.String[] args)

A sample method that reads tokens from a Reader and prints their value to the console.