@NotNull
private static List<Parameter> createParametersFromFields(@NotNull List<? extends Field> fields) {
List<Parameter> result = new LinkedList<Parameter>();
for (Field f : fields)
result.add(new Parameter(new IdentifierImpl("_" + f.getIdentifier().getName()), f.getType()));
return result;
}
@NotNull
private static List<Field> getFinalOrWithEmptyInitializer(@NotNull List<? extends Field> fields) {
List<Field> result = new LinkedList<Field>();
for (Field f : fields)
if (f.isVal() || f.getInitializer().toKotlin().isEmpty()) {
result.add(f);
}
return result;
}
@NotNull
private static List<Statement> createInitStatementsFromFields(
@NotNull List<? extends Field> fields) {
List<Statement> result = new LinkedList<Statement>();
for (Field f : fields) {
String identifierToKotlin = f.getIdentifier().toKotlin();
result.add(new DummyStringExpression(identifierToKotlin + " = " + "_" + identifierToKotlin));
}
return result;
}
@NotNull
private static String createPrimaryConstructorInvocation(
@NotNull String s,
@NotNull List<? extends Field> fields,
@NotNull Map<String, String> initializers) {
List<String> result = new LinkedList<String>();
for (Field f : fields) {
String id = f.getIdentifier().toKotlin();
result.add(initializers.get(id));
}
return s + "(" + AstUtil.join(result, ", ") + ")";
}
@NotNull
public static String getDefaultInitializer(@NotNull Field f) {
if (f.getType().isNullable()) {
return "null";
} else {
String typeToKotlin = f.getType().toKotlin();
if (typeToKotlin.equals("Boolean")) return "false";
if (typeToKotlin.equals("Char")) return "' '";
if (typeToKotlin.equals("Double")) return "0." + OperatorConventions.DOUBLE + "()";
if (typeToKotlin.equals("Float")) return "0." + OperatorConventions.FLOAT + "()";
return "0";
}
}
@NotNull
public Class classToClass(@NotNull PsiClass psiClass) {
Set<String> modifiers = modifiersListToModifiersSet(psiClass.getModifierList());
List<Field> fields = fieldsToFieldList(psiClass.getFields(), psiClass);
List<Element> typeParameters = elementsToElementList(psiClass.getTypeParameters());
List<Type> implementsTypes = typesToNotNullableTypeList(psiClass.getImplementsListTypes());
List<Type> extendsTypes = typesToNotNullableTypeList(psiClass.getExtendsListTypes());
IdentifierImpl name = new IdentifierImpl(psiClass.getName());
List<Expression> baseClassParams = new LinkedList<Expression>();
List<Member> members = getMembers(psiClass);
// we try to find super() call and generate class declaration like that: class A(name: String, i
// : Int) : Base(name)
SuperVisitor visitor = new SuperVisitor();
psiClass.accept(visitor);
Collection<PsiExpressionList> resolvedSuperCallParameters =
visitor.getResolvedSuperCallParameters();
if (resolvedSuperCallParameters.size() == 1) {
baseClassParams.addAll(
expressionsToExpressionList(
resolvedSuperCallParameters.toArray(new PsiExpressionList[1])[0].getExpressions()));
}
// we create primary constructor from all non final fields and fields without initializers
if (!psiClass.isEnum()
&& !psiClass.isInterface()
&& psiClass.getConstructors().length > 1
&& getPrimaryConstructorForThisCase(psiClass) == null) {
List<Field> finalOrWithEmptyInitializer = getFinalOrWithEmptyInitializer(fields);
Map<String, String> initializers = new HashMap<String, String>();
for (Member m : members) {
// and modify secondaries
if (m.getKind() == INode.Kind.CONSTRUCTOR) {
Function f = (Function) m;
if (!((Constructor) f).isPrimary()) {
for (Field fo : finalOrWithEmptyInitializer) {
String init = getDefaultInitializer(fo);
initializers.put(fo.getIdentifier().toKotlin(), init);
}
List<Statement> newStatements = new LinkedList<Statement>();
for (Statement s : f.getBlock().getStatements()) {
boolean isRemoved = false;
if (s.getKind() == INode.Kind.ASSIGNMENT_EXPRESSION) {
AssignmentExpression assignmentExpression = (AssignmentExpression) s;
if (assignmentExpression.getLeft().getKind() == INode.Kind.CALL_CHAIN) {
for (Field fo : finalOrWithEmptyInitializer) {
String id = fo.getIdentifier().toKotlin();
if (((CallChainExpression) assignmentExpression.getLeft())
.getIdentifier()
.toKotlin()
.endsWith("." + id)) {
initializers.put(id, assignmentExpression.getRight().toKotlin());
isRemoved = true;
}
}
}
}
if (!isRemoved) {
newStatements.add(s);
}
}
newStatements.add(
0,
new DummyStringExpression(
"val __ = "
+ createPrimaryConstructorInvocation(
name.toKotlin(), finalOrWithEmptyInitializer, initializers)));
f.setBlock(new Block(newStatements));
}
}
}
members.add(
new Constructor(
Identifier.EMPTY_IDENTIFIER,
Collections.<String>emptySet(),
new ClassType(name),
Collections.<Element>emptyList(),
new ParameterList(createParametersFromFields(finalOrWithEmptyInitializer)),
new Block(createInitStatementsFromFields(finalOrWithEmptyInitializer)),
true));
}
if (psiClass.isInterface()) {
return new Trait(
this,
name,
modifiers,
typeParameters,
extendsTypes,
Collections.<Expression>emptyList(),
implementsTypes,
members);
}
if (psiClass.isEnum()) {
return new Enum(
this,
name,
modifiers,
typeParameters,
Collections.<Type>emptyList(),
Collections.<Expression>emptyList(),
implementsTypes,
members);
}
return new Class(
this,
name,
modifiers,
typeParameters,
extendsTypes,
baseClassParams,
implementsTypes,
members);
}