private static <T> void processConstructor(CtConstructor<T> c, CtClass<T> toMerge) {
CtStatement firstStmt = c.getBody().getStatements().get(0);
if (firstStmt instanceof CtInvocation) {
CtInvocation<?> superConstructorCall = (CtInvocation) firstStmt;
if (!(superConstructorCall.getExecutable().getDeclaration() instanceof CtConstructor)) return;
CtConstructor superConstructor =
(CtConstructor) superConstructorCall.getExecutable().getDeclaration();
if (superConstructor.getDeclaringType() == toMerge) {
CtBlock superConstructorBody = c.getFactory().Core().clone(superConstructor.getBody());
superConstructorBody.accept(
new CtScanner() {
@Override
public <T> void visitCtParameterReference(CtParameterReference<T> ref) {
int parameterOrder = superConstructor.getParameters().indexOf(ref.getDeclaration());
ref.setDeclaringExecutable(c.getReference());
CtExpression<?> arg = superConstructorCall.getArguments().get(parameterOrder);
if (!(arg instanceof CtVariableAccess))
throw sgce("super() should be directly called in " + c);
CtVariable param = ((CtVariableAccess) arg).getVariable().getDeclaration();
if (!(param instanceof CtParameter))
throw sgce("super() should be directly called in " + c);
ref.setSimpleName(param.getSimpleName());
super.visitCtParameterReference(ref);
}
});
c.getBody().removeStatement(firstStmt);
List<CtStatement> superConstructorBodyStatements = superConstructorBody.getStatements();
for (int i = superConstructorBodyStatements.size() - 1; i >= 0; i--) {
c.getBody().insertBegin(superConstructorBodyStatements.get(i));
}
}
}
}
@Test
public void testTransformationOnConstructorWithInsertBegin() throws Exception {
final CtConstructor<?> ctConstructor =
aClass.getElements(new TypeFilter<CtConstructor<?>>(CtConstructor.class)).get(0);
ctConstructor.getBody().insertBegin(factory.Code().createCodeSnippetStatement("int i = 0"));
assertEquals(2, ctConstructor.getBody().getStatements().size());
assertEquals("super()", ctConstructor.getBody().getStatement(0).toString());
TestUtils.canBeBuilt("./target/spooned/spoon/test/constructor/testclasses/", 8);
}
@Test
public void testTransformationOnConstructorWithInsertBefore() throws Exception {
final CtConstructor<?> ctConstructor =
aClass.getElements(new TypeFilter<CtConstructor<?>>(CtConstructor.class)).get(0);
try {
ctConstructor
.getBody()
.getStatement(0)
.insertBefore(factory.Code().createCodeSnippetStatement("int i = 0"));
fail();
} catch (RuntimeException ignore) {
}
assertEquals(1, ctConstructor.getBody().getStatements().size());
assertEquals("super()", ctConstructor.getBody().getStatement(0).toString());
}
@Test
public void callParamConstructor() throws Exception {
CtClass<Object> aClass = factory.Class().get(AClass.class);
CtConstructor<Object> constructor = aClass.getConstructors().iterator().next();
assertEquals(
"{"
+ System.lineSeparator()
+ " enclosingInstance.super();"
+ System.lineSeparator()
+ "}",
constructor.getBody().toString());
}