Java Doc for PreTranslationVisitor.java in » Testing » KeY » de » uka » ilkd » key » proof » decproc » translation » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » KeY » de.uka.ilkd.key.proof.decproc.translation

Source Cross Reference Class Diagram Java Document (Java Doc)

de.uka.ilkd.key.proof.decproc.translation .TranslationVisitor

de.uka.ilkd.key.proof.decproc.translation .PreTranslationVisitor

PreTranslationVisitor

public class PreTranslationVisitor extends TranslationVisitor (Code)

This class implements a visitor used to determine the translatability of KeY Terms into SMT-LIB Formulae.

This implementation is intended for KeY Terms of Sort Formula. To determine if a given Term can be translated into SMT-LIB syntax, its execPretOrder method should be called with an instance of this class as argument. The determined result can be fetched subsequently by the getTranslationResult method, which in case of this class delivers a Boolean indicating the translatability

This class also provides a factory method that can be used to get an instance of this class. It implements the singleton pattern and allows reusing the same visitor object for multiple successive translations, in conjunction with the reset method
author:
akuwertz
version:
1.4, 12/10/2006 (Introduced new superclass 'TranslationVisitor')

Constructor Summary
public	PreTranslationVisitor(boolean useQuantifier) Sole constructor.

Method Summary
public static synchronized TranslationVisitor	getInstance() A factory method returning a `PreTranslationVisitor` instance. This method uses the Singleton pattern.
protected Object	getResult() Returns true if the `Term` visited during the last pretranslation process can be translated into SMT-Lib syntax.
protected boolean	isReusable()
public boolean	noFreeVariableOccurrences(Term t)
public void	reset()
public static void	setTranslateQuantifers(boolean useQuantifiers)
public void	visit(Term t) The visit method of this `PreTranslationVisitor`.

Constructor Detail

PreTranslationVisitor
public PreTranslationVisitor(boolean useQuantifier)(Code)
	Sole constructor. Creates a new `PreTranslationVisitor` and initialises it with the rules for all operators that can not be translated Parameters: useQuantifier - boolean that determines whether quantifiers will be translated or not

Method Detail

getInstance

public static synchronized TranslationVisitor getInstance()(Code)

A factory method returning a PreTranslationVisitor instance.

This method uses the Singleton pattern. It is intended to enable the reuse of an already created visitor object after a complete translation. Use this method to get an instance of PreTranslationVisitor if there is no need for concurrency.

To specify whether the returned instance should translate quantifiers or not, the setTranslateQuantifiers method must be called prior to calling this method a PreTranslationVisitor instance.
throws:
  IllegalStateException - if the cached PreTranslationVisitor instance is notconsidered reusable at this point of time
See Also:   TranslationVisitor.getInstance
See Also:   PreTranslationVisitor.setTranslateQuantifers(boolean)

getResult

protected Object getResult()(Code)

Returns true if the Term visited during the last pretranslation process can be translated into SMT-Lib syntax.

A Term is considered translatable if it does not represent a Quantifier, a Metavariable, a Modality or an IUpdateOperator and does not contain any subterm representing one of the above mentioned Operators.

This method should not be called directly but only accessed via the getTranslationResult method a Boolean indicating if the currently visited Term is consideredtranslatable into SMT-Lib syntax; otherwise false

isReusable
protected boolean isReusable()(Code)
	Returns true if this `PreTranslationVisitor` is ready for the next translation process This holds if that translation process has finished and the `getTranslationResult` method was called, or if the `reset` method has been called in an arbitrary state true if this `TranslationVisitor` is ready to be reused; otherwise false

noFreeVariableOccurrences
public boolean noFreeVariableOccurrences(Term t)(Code)
	Checks whether a given `Term` contains any free quantifiable variables Parameters: t - the `Term` to be checked for free variable occurrences true if no free variables occur in `t`

reset
public void reset()(Code)

setTranslateQuantifers
public static void setTranslateQuantifers(boolean useQuantifiers)(Code)
	Determines whether a `PreTranslationVisitor` instance retrieved by the `getInstance` method translated quantifiers or not Parameters: useQuantifiers - specifies if quantifiers should be translated or not See Also: PreTranslationVisitor.getInstance()

visit
public void visit(Term t)(Code)
	The visit method of this `PreTranslationVisitor`. Takes a `Term` and tries to determine its translatability by its `Operator` See Also: de.uka.ilkd.key.logic.Visitor.visit(de.uka.ilkd.key.logic.Term)

Fields inherited from de.uka.ilkd.key.proof.decproc.translation.TranslationVisitor

final protected static String NoReuseStateException(Code)(Java Doc)
final protected static Logger logger(Code)(Java Doc)
protected String loggingSubclass(Code)(Java Doc)
final protected static String translationNotFinishedException(Code)(Java Doc)
protected IOperatorTranslation[] translationRules(Code)(Java Doc)

Methods inherited from de.uka.ilkd.key.proof.decproc.translation.TranslationVisitor

public static synchronized TranslationVisitor getInstance()(Code)(Java Doc)
abstract protected Object getResult()(Code)(Java Doc)
final public Object getTranslationResult()(Code)(Java Doc)
protected boolean isReusable()(Code)(Java Doc)
final protected String logThis(String toLog)(Code)(Java Doc)
public void reset()(Code)(Java Doc)
final protected void setTranslationRules(ListOfIOperatorTranslation rules)(Code)(Java Doc)
final public void subtreeEntered(Term subtreeRoot)(Code)(Java Doc)
final public void subtreeLeft(Term subtreeRoot)(Code)(Java Doc)
abstract public void visit(Term t)(Code)(Java Doc)

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