pobs.parser
Class PPointer

java.lang.Object
  pobs.parser.PPointer

All Implemented Interfaces:

PObject

public class PPointer

extends java.lang.Object

implements PObject

Pointer to a single parser object. It is used to implement recursive parsers more easily by creating the pointers prior to assigning them their parser. Does nothing but pass through the parse call to the specified parser object.

Author:

Martijn W. van der Lee

Constructor Summary

PPointer()

Method Summary

PMatch	process(PScanner input, long begin, PContext context) Delegates call to the wrapped parser object.
void	set(PObject pObject) Sets the parser to which this pointer references.

Methods inherited from class java.lang.Object

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

Constructor Detail

PPointer

public PPointer()

Method Detail

set

public void set(PObject pObject)

Sets the parser to which this pointer references.

Parameters:

pObject - the references parser

process

public PMatch process(PScanner input,
                      long begin,
                      PContext context)

Delegates call to the wrapped parser object.

Specified by:

process in interface PObject

Parameters:

input - a PScanner which contains the entire input sequence

begin - the index location into the input from where to start processing

context - the current processing context

Returns:

the processing result

Throws:

java.lang.IllegalStateException - if no parser object has been set by set(PObject).

See Also:

PMatch