spoon.reflect.declaration.CtExecutable Java Examples

public void loadCloneGranularity() throws Exception {
	ExtensionPoints cloneGranularityEP = ExtensionPoints.CLONE_GRANULARITY;

	String property = ConfigurationProperties.getProperty(cloneGranularityEP.identifier);

	Class cloneGranularity = null;
	if (property == null || property.trim().isEmpty() || property.equals("type")) {
		cloneGranularity = CtType.class;

	} else if (property.equals("executable")) {
		cloneGranularity = CtExecutable.class;
	} else {
		cloneGranularity = PlugInLoader.loadClassFromProperty(cloneGranularityEP);
		if (cloneGranularity == null) {
			cloneGranularity = CtType.class;
		}
	}
	ConfigurationProperties.setProperty("clonegranularity", cloneGranularity.getName());
}
 

@Override
public void process(CtParameter<?> element) {
	// we declare a new snippet of code to be inserted.
	CtCodeSnippetStatement snippet = getFactory().Core().createCodeSnippetStatement();

	// this snippet contains an if check.
	final String value = String.format("if (%s == null) "
			+ "throw new IllegalArgumentException(\"[Spoon inserted check] null passed as parameter\");",
			element.getSimpleName());
	snippet.setValue(value);

	// we insert the snippet at the beginning of the method body.
	if (element.getParent(CtExecutable.class).getBody() != null) {
		element.getParent(CtExecutable.class).getBody().insertBegin(snippet);
	}
}
 

public void process(Bound annotation, CtParameter<?> element) {
	// Is to be process?
	CtExecutable<?> e = element.getParent();
	if (e.getBody() == null) {
		return;
	}

	// Use template.
	CtClass<?> type = e.getParent(CtClass.class);
	Template t = new BoundTemplate(getFactory().Type().createReference(Double.class), element.getSimpleName(), annotation.min(), annotation.max());
	final CtBlock apply = (CtBlock) t.apply(type);

	// Apply transformation.
	for (int i = apply.getStatements().size() - 1; i >= 0; i--) {
		final CtStatement statement = apply.getStatement(i);
		statement.delete();
		e.getBody().insertBegin(statement);
	}
}
 

private void setfilter() {
	if (cls.equals(CtType.class)) {
		typeFilter = new TypeFilter<CtType>(CtType.class) {
			@Override
			public boolean matches(CtType element) {
				// Definition of "top level" CtType.
				return element.getParent(CtType.class) == null
						&& !element.isImplicit();
			}
		};
	} else if (cls.equals(CtExecutable.class)) {
		typeFilter = new TypeFilter<CtExecutable>(CtExecutable.class) {
			@Override
			public boolean matches(CtExecutable element) {
				// Definition of "top level" CtExecutable.
				return element.getParent(CtExecutable.class) == null
						&& !element.isImplicit()
						&& !(element instanceof CtAnonymousExecutable);
			}
		};
	} else {
		log.error("Invalid clonegranularity");
		throw new IllegalArgumentException();
	}
	log.debug("clonegranularity: " + cls.getName());
}
 

/**
 * Updates the implicitly of a block. Workarround for Spoon 5.4.0
 * 
 * @param block
 * @param isInsert
 */
public static void updateBlockImplicitly(CtBlock block, boolean isInsert) {

	if (!block.isImplicit() && block.getStatements().size() == 1 && !(block.getParent() instanceof CtExecutable)) {
		block.setImplicit(true);
	} else {
		if (isInsert) {
			if (block.isImplicit() && block.getStatements().size() > 1) {
				block.setImplicit(false);
			}
		} else {// Delete
			if (block.isImplicit() && block.getStatements().size() == 0) {
				block.setImplicit(false);
			}
		}
	}
}
 

public void process(CtElement element) {
	if (element instanceof CtType || element instanceof CtField || element instanceof CtExecutable) {
		Set<ModifierKind> modifiers = ((CtModifiable) element).getModifiers();
		if (modifiers.contains(PUBLIC) || modifiers.contains(PROTECTED)) {
			String docComment = element.getDocComment();
			if (docComment == null || docComment.equals("")) {
				System.out.println("undocumented element at " + element.getPosition());
				undocumentedElements.add(element);
			}
		}
	}
}
 

private String getkey(T element) {
	String key;
	if (element instanceof CtExecutable) {
		key = element.getParent(CtType.class).getQualifiedName() + "#" + ((CtExecutable<?>) element).getSignature();
	} else if (element instanceof CtType) {
		key = ((CtType<?>) element).getQualifiedName();
	} else {
		log.error("Invalid clonegranularity");
		throw new IllegalArgumentException();
	}
	return key;
}
 

@Override
public boolean matches(CtExecutable element) {
	// Definition of "top level" CtExecutable.
	boolean t = element.getParent(CtExecutable.class) == null && !element.isImplicit()
			&& !(element instanceof CtAnonymousExecutable);
	return t;
}
 

private String getkey(T element) {
	String key;
	if (element instanceof CtExecutable) {
		key = element.getParent(CtType.class).getQualifiedName() + "#" + ((CtExecutable<?>) element).getSignature();
	} else if (element instanceof CtType) {
		key = ((CtType<?>) element).getQualifiedName();
	} else {
		log.error("Invalid clonegranularity");
		throw new IllegalArgumentException();
	}
	return key;
}
 

@Test
public void testMath85ScopeMethodSpace() throws Exception {

	AstorMain main1 = new AstorMain();
	String dep = new File("./examples/libs/junit-4.4.jar").getAbsolutePath();
	String[] args = new String[] { "-dependencies", dep, "-mode", "jgenprog", "-failing",
			"org.apache.commons.math.distribution.NormalDistributionTest", "-location",
			new File("./examples/math_85").getAbsolutePath(), "-package", "org.apache.commons", "-srcjavafolder",
			"/src/java/", "-srctestfolder", "/src/test/", "-binjavafolder", "/target/classes", "-bintestfolder",
			"/target/test-classes", "-javacompliancelevel", "7", "-flthreshold", "0.5", "-stopfirst", "false",
			// We put 0 as max generation, so we force to not evolve the
			// population
			"-maxgen", "0", "-scope", MethodBasicIngredientScope.class.getCanonicalName(), //
			"-seed", "10", "-ingredientstrategy", ShortestIngredientSearchStrategy.class.getName() };

	main1.execute(args);
	JGenProg astor = (JGenProg) main1.getEngine();
	IngredientSearchStrategy ingStrategy = astor.getIngredientSearchStrategy();

	//
	AstorOperator operator = new ReplaceOp();
	// Let's take a modification point from the first variant. I take the
	// element at 12, it's an assignement.
	ModificationPoint mpoint = astor.getVariants().get(0).getModificationPoints().get(12);
	Ingredient ingLast = ingStrategy.getFixIngredient(mpoint, operator);
	Assert.assertNotNull(ingLast);

	List<String> methods = ingStrategy.getIngredientSpace().getLocations();
	Assert.assertTrue(methods.size() > 0);

	List<Ingredient> ingredients = ingStrategy.getIngredientSpace().getIngredients(mpoint.getCodeElement());
	Assert.assertTrue(ingredients.size() > 0);
	Assert.assertTrue(hasIngredient(ingredients, ingLast));

	CtExecutable exec = (mpoint.getCodeElement().getParent(CtExecutable.class));
	for (Ingredient ctCodeElement : ingredients) {
		assertEquals(exec, ctCodeElement.getCode().getParent(CtExecutable.class));
	}

}
 

@Override
public void process(CtExecutable element) {
	CtCodeSnippetStatement snippet = getFactory().Core().createCodeSnippetStatement();

	// Snippet which contains the log.
	final String value = String.format("System.out.println(\"Enter in the method %s from class %s\");",
			element.getSimpleName(),
			element.getParent(CtClass.class).getSimpleName());
	snippet.setValue(value);

	// Inserts the snippet at the beginning of the method body.
	if (element.getBody() != null) {
		element.getBody().insertBegin(snippet);
	}
}
 

private boolean isMethod(CtElement ctElement) {
    CtExecutable parent = ctElement.getParent(CtExecutable.class);
    if (parent == null) {
        return false;
    }
    return parent.getSimpleName().equals(buggyMethod);
}
 

@Test
public void testProperty_Missing_Feature_Groups() {

	String content = "" + "class X {" +
	//
			"public X() {" + "int b = 0;" + "System.out.println(b);" + "}"
			//
			+ "public Object foo() {" //
			+ "int a = 1;"//
			+ "int b = a;" + "float f = 0;" + "" + "return f;" + "}" //
			+ "public float getFloat(){return 1.0;}"//
			+ "public double getConvertFloat(int i){return 0.0;}"//
			+ "public double getConvert2Float(int i){String s2;Integer.valueOf(s2);return 0.0;}"//
			+ "};";

	CtType type = getCtType(content);

	assertNotNull(type);
	CtExecutable method = (CtExecutable) type.getAllExecutables().stream()
			.filter(e -> ((CtExecutableReference) e).getExecutableDeclaration().getSimpleName().equals("X")
					|| ((CtExecutableReference) e).getExecutableDeclaration().getSimpleName().equals("<init>"))
			.findFirst().get().getExecutableDeclaration();

	assertNotNull(method);

	CtElement stassig = method.getBody().getStatements().stream()
			.filter(e -> e.toString().contains("System.out.println(b)")).findFirst().get();

	CodeFeatureDetector cntxResolver = new CodeFeatureDetector();
	Cntx cntx = cntxResolver.analyzeFeatures(stassig);

	printJSon(cntx.toJSON());

	Boolean hasFeat_vars = cntx.getInformation().containsKey("FEATURES_VARS");
	assertTrue(hasFeat_vars);

	Boolean hasFeat_method = cntx.getInformation().containsKey("FEATURES_METHODS");
	assertTrue(hasFeat_method);

	Cntx feat_vars = (Cntx) cntx.getInformation().get("FEATURES_VARS");
	assertFalse(feat_vars.getInformation().isEmpty());

	Cntx feat_method = (Cntx) cntx.getInformation().get("FEATURES_METHODS");
	assertFalse(feat_method.getInformation().isEmpty());

	Boolean hasS6 = cntx.getInformation().containsKey(CodeFeatures.S6_METHOD_THROWS_EXCEPTION.toString());

	assertTrue(hasS6);

}
 

/**
 *
 * 
 * @param suspiciousElement
 * @param context
 * @return
 */
@Override
public MapList<CtInvocation, Ingredient> retrieveInvocationIngredient(ModificationPoint point) {
	CtElement suspiciousElement = point.getCodeElement();

	CtClass classUnderAnalysis = suspiciousElement.getParent(CtClass.class);

	MapList<CtInvocation, Ingredient> similarInvocationResult = new MapList<>();

	List<CtInvocation> invocations = getInvocations(suspiciousElement);
	for (CtInvocation invocationToReplace : invocations) {

		CtExecutable minvokedInAffected = invocationToReplace.getExecutable().getDeclaration();

		if (minvokedInAffected == null || !(minvokedInAffected instanceof CtMethod))
			continue;

		CtMethod affectedMethod = (CtMethod) minvokedInAffected;

		CtType typeOfTarget = invocationToReplace.getTarget().getType().getTypeDeclaration();

		if (!(typeOfTarget instanceof CtClass))
			continue;

		CtClass targetOfInvocation = (CtClass) typeOfTarget;

		List allMethods = SupportOperators.getAllMethodsFromClass(targetOfInvocation);

		for (Object omethod : allMethods) {

			if (!(omethod instanceof CtMethod))
				continue;

			CtMethod anotherMethod = (CtMethod) omethod;

			if (anotherMethod.getSimpleName().startsWith(VarReplacementByMethodCallOp.META_METHOD_LABEL))
				// It's a meta-method, discard
				continue;

			if (anotherMethod.getSignature().equals(affectedMethod.getSignature()))
				// It's the same, we discard it.
				continue;

			// Only if the target is the class we can call to non public methods
			if (!targetOfInvocation.equals(classUnderAnalysis) && !anotherMethod.isPublic())
				continue;

			// The name must be the same
			if (anotherMethod.getSimpleName().equals(affectedMethod.getSimpleName())) {

				if (anotherMethod.getType() != null && minvokedInAffected.getType() != null) {

					boolean compatibleReturnTypes = SupportOperators.checkIsSubtype(anotherMethod.getType(),
							minvokedInAffected.getType());
					// must return the same object
					if (compatibleReturnTypes) {

						// Case 3: Different number argument
						if (anotherMethod.getParameters().size() != affectedMethod.getParameters().size()
								// check the types
								|| (!anotherMethod.getParameters().isEmpty()
										&& !affectedMethod.getParameters().isEmpty()
										&& !anotherMethod.getParameters().equals(affectedMethod.getParameters()))) {

							List<CtInvocation> newInvToMethods = SupportOperators
									.createRealInvocationsReusingVars(point, anotherMethod, invocationToReplace);

							for (CtInvocation ctInvocation : newInvToMethods) {
								CtInvocation newInvocation = ctInvocation.clone();
								newInvocation.setExecutable(anotherMethod.getReference());
								Ingredient newIngredient = new Ingredient(newInvocation);
								newIngredient.setDerivedFrom(invocationToReplace);
								similarInvocationResult.add(invocationToReplace, newIngredient);
								newIngredient.getMetadata().put("original", invocationToReplace);
								newIngredient.getMetadata().put("replacement", ctInvocation);

							}

						}
					}

				}
			}
		}

	}
	return similarInvocationResult;

}
 

/**
 * Case 1: Argument removement
 * 
 * @param suspiciousElement
 * @param context
 * @return
 */
@Override
public MapList<CtInvocation, Ingredient> retrieveInvocationIngredient(ModificationPoint point) {

	CtElement suspiciousElement = point.getCodeElement();
	CtClass classUnderAnalysis = suspiciousElement.getParent(CtClass.class);

	MapList<CtInvocation, Ingredient> similarInvocationResult = new MapList<>();

	List<CtInvocation> invocations = getInvocations(suspiciousElement);

	for (CtInvocation invocationToReplace : invocations) {

		CtExecutable minvokedInAffected = invocationToReplace.getExecutable().getDeclaration();

		if (minvokedInAffected == null || !(minvokedInAffected instanceof CtMethod))
			continue;

		CtMethod affectedMethod = (CtMethod) minvokedInAffected;

		CtType typeOfTarget = invocationToReplace.getTarget().getType().getTypeDeclaration();

		if (!(typeOfTarget instanceof CtClass))
			continue;

		CtClass targetOfInvocation = (CtClass) typeOfTarget;

		List allMethods = SupportOperators.getAllMethodsFromClass(targetOfInvocation);

		for (Object omethod : allMethods) {

			if (!(omethod instanceof CtMethod))
				continue;

			CtMethod anotherMethod = (CtMethod) omethod;

			if (anotherMethod.getSimpleName().startsWith(VarReplacementByMethodCallOp.META_METHOD_LABEL))
				// It's a meta-method, discard
				continue;

			if (anotherMethod.getSignature().equals(affectedMethod.getSignature()))
				// It's the same, we discard it.
				continue;

			// Only if the target is the class we can call to non public methods
			if (!targetOfInvocation.equals(classUnderAnalysis) && !anotherMethod.isPublic())
				continue;

			// The name must be the same
			if (anotherMethod.getSimpleName().equals(affectedMethod.getSimpleName())) {

				if (anotherMethod.getType() != null && minvokedInAffected.getType() != null) {

					boolean compatibleReturnTypes = SupportOperators.checkIsSubtype(anotherMethod.getType(),
							minvokedInAffected.getType());
					// must return the same object
					if (compatibleReturnTypes) {

						// CASE 1: Different method name
						if (anotherMethod.getParameters().size() < affectedMethod.getParameters().size()) {

							List newArguments = SupportOperators.checkOcurrenceOfOtherParameters(anotherMethod,
									affectedMethod, invocationToReplace.getArguments());
							if (newArguments != null) {

								CtInvocation newInvocation = MutationSupporter.getFactory().createInvocation(
										invocationToReplace.getTarget(), anotherMethod.getReference(),
										newArguments);
								newInvocation.setExecutable(anotherMethod.getReference());
								newInvocation.setArguments(newArguments);
								newInvocation.setTarget(invocationToReplace.getTarget());

								Ingredient newIngredient = new Ingredient(newInvocation);
								newIngredient.setDerivedFrom(invocationToReplace);

								similarInvocationResult.add(invocationToReplace, newIngredient);

								newIngredient.getMetadata().put("original", invocationToReplace);
								newIngredient.getMetadata().put("replacement", newInvocation);
							}
						}
					}

				}
			}
		}

	}
	return similarInvocationResult;

}
 

@Override
public String calculateLocation(CtElement original) {
	CtExecutable method =  original.getParent(CtExecutable.class);
	return method.getReference().toString();
}
 

@Test
public void testProperty_Missing_S6_METHOD_THROWS_EXCEPTION() {

	String content = "" + "class X {"
	//
			+ "public X() {" + "int b = 0;" + "}"
			//
			+ "public Object foo() {" //
			+ "int a = 1;"//
			+ "int b = a;" + "float f = 0;" + "" + "return f;" + "}" //
			+ "public float getFloat(){return 1.0;}"//
			+ "public double getConvertFloat(int i){return 0.0;}"//
			+ "public double getConvert2Float(int i){String s2;Integer.valueOf(s2);return 0.0;}"//
			+ "};";

	CtType type = getCtType(content);

	assertNotNull(type);
	CtExecutable method = (CtExecutable) type.getAllExecutables().stream()
			.filter(e -> ((CtExecutableReference) e).getExecutableDeclaration().getSimpleName().equals("X")
					|| ((CtExecutableReference) e).getExecutableDeclaration().getSimpleName().equals("<init>"))
			.findFirst().get().getExecutableDeclaration();

	assertNotNull(method);
	System.out.println(method);
	CtElement stassig = method.getBody().getStatements().stream().filter(e -> e.toString().startsWith("int b = 0"))
			.findFirst().get();
	System.out.println(stassig);
	CodeFeatureDetector cntxResolver = new CodeFeatureDetector();
	Cntx cntx = cntxResolver.analyzeFeatures(stassig);

	printJSon(cntx.toJSON());

	Cntx feat_vars = (Cntx) cntx.getInformation().get("FEATURES_VARS");
	assertTrue(feat_vars.getInformation().isEmpty());

	Boolean hasFeat_method = cntx.getInformation().containsKey("FEATURES_METHOD_INVOCATION");
	assertTrue(hasFeat_method);

	Cntx feat_method = (Cntx) cntx.getInformation().get("FEATURES_METHOD_INVOCATION");
	assertTrue(feat_method.getInformation().isEmpty());

	Boolean hasS6 = cntx.getInformation().containsKey(CodeFeatures.S6_METHOD_THROWS_EXCEPTION.toString());

	assertTrue(hasS6);

}
 

public CommandSummary commandLang8(String dep, File out, boolean step) {

		ClassLoader classLoader = getClass().getClassLoader();
		File learningDir = new File(classLoader.getResource("learninglang8").getFile());
		Class cloneGranularityClass = CtExecutable.class;
		String scope = CtClassIngredientSpace.class.getCanonicalName();

		String[] args = new String[] { "-dependencies", dep, "-mode", "jgenprog", "-failing",
				"org.apache.commons.lang3.time.FastDateFormat_PrinterTest" + File.pathSeparator
						+ "org.apache.commons.lang3.time.FastDatePrinterTest",
				//
				"-location", new File("./examples/lang_8/").getAbsolutePath(),
				//
				//
				// "-package", "org.apache.commons",
				"-srcjavafolder", "/src/main/java/", "-srctestfolder", "/src/test/java/", "-binjavafolder",
				"/target/classes/", //
				"-bintestfolder", "/target/tests/", "-javacompliancelevel", "6", "-flthreshold", "0.1",
				//
				"-out", out.getAbsolutePath(), "-scope", "package", "-seed", "60", "-maxgen", "200",
				//
				"-stopfirst", "true", "-maxtime", "10", (step) ? "-testbystep" : "",
				// "-validation", RegressionValidation.class.getName(),
				//
				// "-ignoredtestcases",
				// "org.apache.commons.lang.LocaleUtilsTest",
				"-timezone", "America/New_York",
				//
				"-scope", scope,
				//
				"-learningdir", learningDir.getAbsolutePath(),
				//
				"-clonegranularity", cloneGranularityClass.getCanonicalName(),
				//
				"-ingredientstrategy", CloneIngredientSearchStrategy.class.getName(),
				//
				"-transformingredient",

		};
		return new CommandSummary(args);
	}
 

@Override
public boolean matches(CtExecutable element) {
	// Definition of "top level" CtExecutable.
	return element.getParent(CtExecutable.class) == null && !element.isImplicit()
			&& !(element instanceof CtAnonymousExecutable);
}
 

public boolean[] analyze_SametypewithGuard(List<CtVariableAccess> varsAffected, CtElement element,
			CtClass parentClass, List<CtStatement> statements) {

		boolean hasPrimitiveSimilarTypeWithNormalGuard = false;
		boolean hasObjectSimilarTypeWithNormalGuard = false;
		boolean hasPrimitiveSimilarTypeWithNullGuard = false;
		boolean hasObjectSimilarTypeWithNullGuard = false;

		try {
			CtExecutable faultyMethodParent = element.getParent(CtExecutable.class);

			if (faultyMethodParent == null)
				// the element is not in a method.
				return null;

			// For each variable affected
			for (CtVariableAccess variableAffected : varsAffected) {
				// for (CtStatement aStatement : statements) {
				CtStatement parent = variableAffected.getParent(new LineFilter());

				if (isNormalGuard(variableAffected, (parent)) || isNullCheckGuard(variableAffected, (parent)))
					continue;

				// For each statement in the method (it includes the statements inside the
				// blocks (then, while)!)
				for (CtStatement aStatement : statements) {
					// for (CtVariableAccess variableAffected : varsAffected) {

					if (parent == aStatement)
						continue;

					List<CtVariableAccess> varsFromStatement;

					if (aStatement instanceof CtIf || aStatement instanceof CtLoop) {
						varsFromStatement = VariableResolver.collectVariableRead(retrieveElementToStudy(aStatement));
					} else
						varsFromStatement = VariableResolver.collectVariableRead(aStatement);
//
//					// let's collect the var access in the statement
//					List<CtVariableAccess> varsFromStatement = VariableResolver
//							.collectVariableReadIgnoringBlocks(aStatement);
					// if the var access is the same that the affected
					for (CtVariableAccess varInStatement : varsFromStatement) {
						// Has similar type but different name
						if (compareTypes(variableAffected.getVariable().getType(),
								varInStatement.getVariable().getType())) {
							// && !hasSameName(variableAffected, varInStatement)) {
							// Now, let's check if the parent is a guard
							// if (isGuard(getParentNotBlock(aStatement))) {
							if (isNormalGuard(varInStatement, (aStatement))) {

								// it's ok, now let's check the type
								if (variableAffected.getType() != null) {
									// for primitive type variables, we require it to be the same global variable
									if (variableAffected.getType().isPrimitive() && varInStatement.getVariable()
											.getSimpleName().equals(variableAffected.getVariable().getSimpleName()))
										hasPrimitiveSimilarTypeWithNormalGuard = true;
									else
										hasObjectSimilarTypeWithNormalGuard = true;
								}
							}

							if (isNullCheckGuard(varInStatement, (aStatement))) {

								// it's ok, now let's check the type
								if (variableAffected.getType() != null) {

									if (variableAffected.getType().isPrimitive() && varInStatement.getVariable()
											.getSimpleName().equals(variableAffected.getVariable().getSimpleName()))
										hasPrimitiveSimilarTypeWithNullGuard = true;
									else
										hasObjectSimilarTypeWithNullGuard = true;
								}
							}

						}
					}
					// If we find both cases, we can stop
					if (hasPrimitiveSimilarTypeWithNormalGuard && hasObjectSimilarTypeWithNormalGuard
							&& hasPrimitiveSimilarTypeWithNullGuard && hasObjectSimilarTypeWithNullGuard)
						break;
				}
			}

		} catch (Throwable e) {
			e.printStackTrace();
		}

		boolean[] expressionvalue = new boolean[4];
		expressionvalue[0] = hasObjectSimilarTypeWithNormalGuard;
		expressionvalue[1] = hasPrimitiveSimilarTypeWithNormalGuard;
		expressionvalue[2] = hasObjectSimilarTypeWithNullGuard;
		expressionvalue[3] = hasPrimitiveSimilarTypeWithNullGuard;

		return expressionvalue;

	}
 

/**
 * whether the associated method or class for the faulty line throws exception
 * 
 * @param element
 * @param context
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
private void analyzeS6S11_Method_Method_Features(CtElement element, Cntx<Object> context) {
	try {

		CtExecutable parentMethod = element.getParent(CtExecutable.class);

		CtClass parentClass = element.getParent(CtClass.class);

		CtStatement parent = element.getParent(new LineFilter());
		CtTry potentionalTryCatch = element.getParent(CtTry.class);

		if (potentionalTryCatch != null && whethereffectivetrycatch(potentionalTryCatch, parent)) {

			context.put(CodeFeatures.S6_METHOD_THROWS_EXCEPTION, false);
			context.put(CodeFeatures.S11_FAULTY_CLASS_EXCEPTION_TYPE, false);

		} else {

			if (parentMethod != null) {
				// Exception
				context.put(CodeFeatures.S6_METHOD_THROWS_EXCEPTION, parentMethod.getThrownTypes().size() > 0);
			}

			boolean s11ExceptionType = false;

			if (parentClass != null) {

				Set<CtTypeReference<?>> superInterfaces = parentClass.getSuperInterfaces();
				CtTypeReference<?> superType = parentClass.getSuperclass();

				if (superType != null && superType.getQualifiedName().toLowerCase().indexOf("exception") != -1)
					s11ExceptionType = true;

				if (superInterfaces.size() > 0) {
					for (CtTypeReference specificreference : superInterfaces) {
						if (specificreference != null
								&& specificreference.getQualifiedName().toLowerCase().indexOf("exception") != -1) {
							s11ExceptionType = true;
							break;
						}
					}
				}
				context.put(CodeFeatures.S11_FAULTY_CLASS_EXCEPTION_TYPE, s11ExceptionType);
			}
		}
	} catch (Throwable e) {
		e.printStackTrace();
	}
}
 

private void analyzeV15_LastthreeVariableIntroduction (List<CtVariableAccess> varsAffected, CtElement element,
		Cntx<Object> context) {
	try {
		
		CtExecutable methodParent = element.getParent(CtExecutable.class);

		if (methodParent == null)
			// the element is not in a method.
			return;
		
		List<CtStatement> statements=methodParent.getElements(new LineFilter());

		// For each variable affected
		for (CtVariableAccess variableAffected : varsAffected) {

			List<CtStatement> statementbefore = new ArrayList<>();
			
			boolean lastthreesametypeloc=false;

			for (CtStatement aStatement : statements) {

				CtStatement parent = variableAffected.getParent(new LineFilter());
									
				if (!isElementBeforeVariable(variableAffected, aStatement))
					continue;
				
				if (isStatementInControl(parent, aStatement) || parent==aStatement)
					continue;
				
				if(aStatement instanceof CtIf || aStatement instanceof CtLoop) 
					continue;
				
				statementbefore.add(aStatement);
			}
			
			List<CtStatement> statinterest = new ArrayList<>();
			
			if(statementbefore.size()<=4)
				statinterest=statementbefore;
			else {
				statinterest.add(statementbefore.get(statementbefore.size()-1));
				statinterest.add(statementbefore.get(statementbefore.size()-2));
				statinterest.add(statementbefore.get(statementbefore.size()-3));
				statinterest.add(statementbefore.get(statementbefore.size()-4));
			}

			for (int index=0; index< statinterest.size(); index++) {
				if(statinterest.get(index) instanceof CtLocalVariable) {
					CtLocalVariable ctLocalVariable=(CtLocalVariable)statinterest.get(index);

					if (!ctLocalVariable.getReference().getSimpleName()
							.equals(variableAffected.getVariable().getSimpleName()) 
							&& compareTypes(ctLocalVariable.getType(), variableAffected.getType())) {
						lastthreesametypeloc = true;
						break;
					}
				}
			}
			
			writeGroupedInfo(context, adjustIdentifyInJson(variableAffected), 
					CodeFeatures.V15_VAR_LAST_THREE_SAME_TYPE_LOC,
					(lastthreesametypeloc), "FEATURES_VARS");
		}
	} catch (Throwable e) {
		e.printStackTrace();
	}
}
 

/**
 * For case 2
 * 
 * @param suspiciousElement
 * @param context
 * @return
 */
@Override
public MapList<CtInvocation, Ingredient> retrieveInvocationIngredient(ModificationPoint point) {
	CtElement suspiciousElement = point.getCodeElement();

	CtClass classUnderAnalysis = suspiciousElement.getParent(CtClass.class);

	MapList<CtInvocation, Ingredient> similarInvocationResult = new MapList<>();

	List<CtInvocation> invocations = getInvocations(suspiciousElement);

	for (CtInvocation invocationToReplace : invocations) {

		CtExecutable minvokedInAffected = invocationToReplace.getExecutable().getDeclaration();

		if (minvokedInAffected == null || !(minvokedInAffected instanceof CtMethod))
			continue;

		CtMethod affectedMethod = (CtMethod) minvokedInAffected;

		CtType typeOfTarget = invocationToReplace.getTarget().getType().getTypeDeclaration();

		if (!(typeOfTarget instanceof CtClass))
			continue;

		CtClass targeClasstOfInvocation = (CtClass) typeOfTarget;

		List allMethods = SupportOperators.getAllMethodsFromClass(targeClasstOfInvocation);

		for (Object omethod : allMethods) {

			if (!(omethod instanceof CtMethod))
				continue;

			CtMethod anotherMethod = (CtMethod) omethod;

			if (anotherMethod.getSignature().equals(affectedMethod.getSignature()))
				// It's the same, we discard it.
				continue;

			if (anotherMethod.getSimpleName().startsWith(VarReplacementByMethodCallOp.META_METHOD_LABEL))
				// It's a meta-method, discard
				continue;

			// Only if the target is the class we can call to non public methods
			if (!targeClasstOfInvocation.equals(classUnderAnalysis) && !anotherMethod.isPublic())
				continue;

			if (anotherMethod.getSimpleName().equals(affectedMethod.getSimpleName())) {
				// It's override
				// TODO:
				// similarInvocationResult.add(affectedMethod, anotherMethod);

			}

			if (anotherMethod.getType() != null && minvokedInAffected.getType() != null) {

				boolean compatibleReturnTypes = SupportOperators.checkIsSubtype(anotherMethod.getType(),
						minvokedInAffected.getType());
				if (compatibleReturnTypes) {

					// CASE 2: Different method name
					if (anotherMethod.getParameters().size() == affectedMethod.getParameters().size()
							&& anotherMethod.getParameters().equals(affectedMethod.getParameters())) {

						List<CtInvocation> newInvToMethods = SupportOperators
								.createRealInvocationsReusingVars(point, anotherMethod, invocationToReplace);

						for (CtInvocation aNewInvocation : newInvToMethods) {
							CtInvocation newInvocationCloned = aNewInvocation.clone();
							newInvocationCloned.setExecutable(anotherMethod.getReference());
							Ingredient newIngredient = new Ingredient(newInvocationCloned);
							newIngredient.setDerivedFrom(invocationToReplace);
							newIngredient.getMetadata().put("original", invocationToReplace);
							newIngredient.getMetadata().put("replacement", aNewInvocation);

							similarInvocationResult.add(invocationToReplace, newIngredient);

						}
					}
				}

			}

		}

	}
	return similarInvocationResult;

}