Pattern Class Reference

Protocol class which defines the interface for pattern recognition classes. More...

#include <keyvalue/pattern/Pattern.h>

Inheritance diagram for Pattern:

List of all members.

Classes
class	QueueRaii
	This class implements RAII for a frontend::Queue. More...
Public Member Functions
virtual bool	parse (frontend::Queue &queue)=0
	Parses the beginning of a frontend::Queue.
virtual std::pair< string, value::Value >	pop ()=0
	Gets and removes the next stored key-value pair.
virtual bool	isEmpty () const =0
	Checks if the list of recognized key-value pairs is empty.

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Detailed Description

Protocol class which defines the interface for pattern recognition classes.

Each derived class is able to parse the beginning of a queue in an attempt to recognize a specific pattern of key-value pairs.

When a pattern is recognized (by parse()), the corresponding key-value pairs are stored in a list to be extracted later (by pop()).

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Member Function Documentation

virtual bool parse

(

frontend::Queue &

queue

)

[pure virtual]

Parses the beginning of a frontend::Queue.

When a pattern is recognized, the value::Value objects which make it are removed from frontend::Queue and all corresponding key-value pairs are stored inside the this class for later queries.

Parameters:

queue

: frontend::Queue to be parsed.

Returns:

If the pattern is recognized, then this method returns true. Otherwise, it returns false.

Implemented in KeyInSingle, KeysInMatrix, KeysInVector, and Table.

virtual std::pair<string, value::Value> pop

(

)

[pure virtual]

Gets and removes the next stored key-value pair.

The debug version checks if there is any key-value pair be popped (by calling isEmpty()) and throw an exception when the check fails. Release version has undefined behavior when the list is empty.

Returns:

The key-value pair.

Exceptions:

LogicError

: (Debug build only) When the list is empty.

Implemented in KeyInSingle, KeysInMatrix, KeysInVector, and Table.

virtual bool isEmpty

(

)

const [pure virtual]

Checks if the list of recognized key-value pairs is empty.

Returns:

If the list is empty, this method returns true. Otherwise, it returns false.

Implemented in KeyInSingle, KeysInMatrix, KeysInVector, and Table.