name.angoca.db2sa.core.syntax
Class ImplSyntaxAnalyzer

java.lang.Object
  name.angoca.db2sa.core.syntax.AbstractSyntacticalAnalyzer
      name.angoca.db2sa.core.syntax.ImplSyntaxAnalyzer

public final class ImplSyntaxAnalyzer
extends AbstractSyntacticalAnalyzer

This is the implementation of the syntax analyzer. This is almost the most important part of the application.
Control Version

• 0.0.1 Class creation with first algorithm
• 0.0.2 Change the algorithm.
• 0.1.0 Throw exception when the graph is invalid.
• 0.2.0 Old algorithm deleted.
• 0.3.0 Recommendations from PMD.
• 0.3.1 Organized.
• 0.3.2 Instantiated object.
• 0.3.3 EndingToken not like an option.
• 0.3.4 InputSource for the XML file.
• 0.4.0 Invalid graph exception.
• 0.5.0 Destroy instance.
• 0.5.1 Starting and ending token as constants.
• 0.5.2 Logger messages.
• 0.5.3 Free resources when destroys the instance.
• 0.5.4 variable name and final.
• 1.0.0 Moved to version 1.

Version:

1.0.0 2009-07-19

Author:

Andres Gomez Casanova (AngocA)

Constructor Summary

ImplSyntaxAnalyzer()
Constructor that sets a token that permits to scan the graph.

Method Summary

static void	destroyInstance() Destroys the instance.
static ImplSyntaxAnalyzer	getInstance() Implementation of solitaire pattern, that returns the only instance of an object.
GraphAnswer	getOptions(List<Token> phrase) Returns the possible options that a given phrase can have.

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplSyntaxAnalyzer

public ImplSyntaxAnalyzer()
                   throws InvalidGraphException

Constructor that sets a token that permits to scan the graph.

Throws:

InvalidGraphException - When there is a problem when creating the graph.

Method Detail

getInstance

public static ImplSyntaxAnalyzer getInstance()
                                      throws InvalidGraphException

Implementation of solitaire pattern, that returns the only instance of an object.

Returns:

The only instance of this object.

Throws:

InvalidGraphException - When there is a problem at graph creation.

destroyInstance

public static void destroyInstance()

Destroys the instance. Useful for testing purposes.

getOptions

public GraphAnswer getOptions(List<Token> phrase)
                       throws InvalidGraphException

Description copied from class: AbstractSyntacticalAnalyzer

Returns the possible options that a given phrase can have. When no option is found, the returned array is empty (not null).

Specified by:

getOptions in class AbstractSyntacticalAnalyzer

Parameters:

phrase - Phrase to analyze. This is an ensemble of tokens that are sorted in the same way that words were written by the user.

Returns:

The possible answers: the command completed or the options.

Throws:

InvalidGraphException - When the graph has an invalid structure.