public void process() {
for (TypeDeclaration typeDecl : env.getSpecifiedTypeDeclarations()) {
ExtractInterface annot = typeDecl.getAnnotation(ExtractInterface.class);
if (annot == null) break;
for (MethodDeclaration m : typeDecl.getMethods())
if (m.getModifiers().contains(Modifier.PUBLIC)
&& !(m.getModifiers().contains(Modifier.STATIC))) interfaceMethods.add(m);
if (interfaceMethods.size() > 0) {
try {
PrintWriter writer = env.getFiler().createSourceFile(annot.value());
writer.println("package " + typeDecl.getPackage().getQualifiedName() + ";");
writer.println("public interface " + annot.value() + " {");
for (MethodDeclaration m : interfaceMethods) {
writer.print(" public ");
writer.print(m.getReturnType() + " ");
writer.print(m.getSimpleName() + " (");
int i = 0;
for (ParameterDeclaration parm : m.getParameters()) {
writer.print(parm.getType() + " " + parm.getSimpleName());
if (++i < m.getParameters().size()) writer.print(", ");
}
writer.println(");");
}
writer.println("}");
writer.close();
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
}
}
private boolean checkInheritedMethod(
Thing data,
String methodName,
String returnType,
ClassDeclaration superclass,
boolean finalOk,
InheritCheck inheritCheck) {
if (inheritCheck != null) {
if (inheritCheck.isInherited(data, superclass)) {
return true;
}
}
for (MethodDeclaration methodDeclaration : superclass.getMethods()) {
if (methodName.equals(methodDeclaration.getSimpleName())
&& methodDeclaration.getParameters().isEmpty()
&& returnType.equals(methodDeclaration.getReturnType().toString())) {
data.put(methodName + "Inherited", true);
Collection<Modifier> modifiers = methodDeclaration.getModifiers();
if ((modifiers.contains(Modifier.FINAL) || modifiers.contains(Modifier.PRIVATE))
&& !finalOk) {
// TBD TBD TBD - ERROR!!! cannot extend class with superclass method like this - how to
// report?
} else if (modifiers.contains(Modifier.PROTECTED)) {
data.put(methodName + "Modifiers", "protected");
} else if (modifiers.contains(Modifier.PUBLIC)) {
data.put(methodName + "Modifiers", "public");
} else {
data.put(methodName + "Modifiers", "");
}
return true;
}
}
if (superclass.getSuperclass() != null) {
if (superclass.getSuperclass().getDeclaration() != null) {
if (checkInheritedMethod(
data,
methodName,
returnType,
superclass.getSuperclass().getDeclaration(),
finalOk,
inheritCheck)) {
return true;
}
}
}
return false;
}
private void processDefaultMethods(Thing data, ClassDeclaration classDeclaration) {
// find any methods that have default parameters
boolean error = false;
for (ConstructorDeclaration constructorDeclaration : classDeclaration.getConstructors()) {
Collection<ParameterDeclaration> parameters = constructorDeclaration.getParameters();
for (ParameterDeclaration parameterDeclaration : parameters) {
Default annotation = parameterDeclaration.getAnnotation(Default.class);
if (annotation != null) {
error(parameterDeclaration, "@Default is not legal in constructor parameters");
error = true;
}
}
}
if (error) {
return;
}
boolean atLeastOneDefault = false;
methods:
for (MethodDeclaration methodDeclaration : classDeclaration.getMethods()) {
Collection<ParameterDeclaration> parameters = methodDeclaration.getParameters();
boolean seenDefault = false;
String[] names = new String[parameters.size()];
String[] types = new String[parameters.size()];
String[] defaults = new String[parameters.size()];
int n = 0;
for (ParameterDeclaration parameterDeclaration : parameters) {
Default annotation = parameterDeclaration.getAnnotation(Default.class);
names[n] = parameterDeclaration.getSimpleName();
types[n] = parameterDeclaration.getType().toString();
if (annotation != null) {
seenDefault = true;
if ("java.lang.String".equals(types[n])) {
defaults[n] = '"' + annotation.value() + '"';
} else {
defaults[n] = annotation.value();
}
} else if (seenDefault) {
error(
parameterDeclaration,
"All parameters after a parameter annotated with @Default must be annotated with @Default");
continue methods;
}
n++;
}
if (seenDefault) {
atLeastOneDefault = true;
if (methodDeclaration.getModifiers().contains(Modifier.PRIVATE)) {
error(methodDeclaration, "Private methods cannot use @Default parameters");
}
if (methodDeclaration.getModifiers().contains(Modifier.STATIC)) {
error(methodDeclaration, "Static methods cannot use @Default parameters");
}
String modifiers3 = "";
if (methodDeclaration.getModifiers().contains(Modifier.PUBLIC)) {
modifiers3 = "public ";
} else if (methodDeclaration.getModifiers().contains(Modifier.PROTECTED)) {
modifiers3 = "protected ";
}
String throwsClause = getThrowsClause(methodDeclaration);
String returnType = methodDeclaration.getReturnType().toString();
String methodName = methodDeclaration.getSimpleName();
String argDecl = "";
String callArgs = "";
for (int i = 0; i < n; i++) {
if (defaults[i] != null) {
String callArgsWithDefaults = callArgs;
for (int j = i; j < n; j++) {
if (j > 0) {
callArgsWithDefaults += ", ";
}
callArgsWithDefaults += defaults[j];
}
Thing method = new Thing("method");
method.put("name", methodName);
method.put("returnType", returnType);
method.put("throwsClause", throwsClause);
method.put("argDecls", argDecl);
method.put("modifiers", modifiers3);
method.put("args", callArgsWithDefaults);
data.add("defaultMethods", method);
}
if (i > 0) {
argDecl += ", ";
callArgs += ", ";
}
argDecl += types[i] + ' ' + names[i];
callArgs += names[i];
}
Thing method = new Thing("method");
method.put("name", methodName);
method.put("returnType", returnType);
method.put("throwsClause", throwsClause);
method.put("modifiers", modifiers3);
method.put("abstract", true);
method.put("argDecls", argDecl);
data.add("defaultMethods", method);
}
}
data.put("atLeastOneDefault", atLeastOneDefault);
if (!atLeastOneDefault) {
data.setEmpty("defaultMethods");
}
}
private Thing setupMethod(ExecutableDeclaration declaration, boolean forceNonAbstract) {
String name = null;
String returnType = null;
boolean isAbstract = false;
String nullBody = null;
String throwsClause = "";
if (declaration instanceof ConstructorDeclaration) {
name = "<init>";
} else {
MethodDeclaration methodDeclaration = (MethodDeclaration) declaration;
name = methodDeclaration.getSimpleName();
returnType = methodDeclaration.getReturnType().toString();
if (!forceNonAbstract) {
isAbstract = methodDeclaration.getModifiers().contains(Modifier.ABSTRACT);
}
if ("void".equals(returnType)) {
nullBody = "// null object implementation; do nothing";
} else if ("boolean".equals(returnType)) {
nullBody = "false; // null object implementation";
} else if ("char".equals(returnType)) {
nullBody = "' '; // null object implementation";
} else if (BeanAnnotationProcessor.PRIMITIVE_TYPES.contains(returnType)) {
nullBody = "0; // null object implementation";
} else {
nullBody = "null; // null object implementation";
}
}
Collection<ReferenceType> thrownTypes = declaration.getThrownTypes();
if (!thrownTypes.isEmpty()) {
throwsClause = "throws " + commaSeparate(thrownTypes);
}
String genericDecls = null;
String argDecls = null;
String args = null;
String modifiers = "";
Collection<ParameterDeclaration> parameters = declaration.getParameters();
for (ParameterDeclaration parameterDeclaration : parameters) {
argDecls =
addWithCommasBetween(
argDecls,
parameterDeclaration.getType() + " " + parameterDeclaration.getSimpleName());
args = addWithCommasBetween(args, parameterDeclaration.getSimpleName());
}
Collection<TypeParameterDeclaration> formalTypeParameters =
declaration.getFormalTypeParameters();
for (TypeParameterDeclaration typeParameterDeclaration : formalTypeParameters) {
genericDecls = addWithCommasBetween(genericDecls, typeParameterDeclaration);
}
Collection<Modifier> modifiers2 = declaration.getModifiers();
for (Modifier modifier : modifiers2) {
if (!"abstract".equals(modifier.toString())) {
modifiers += modifier.toString() + ' ';
}
}
if (genericDecls == null) {
genericDecls = "";
} else {
genericDecls = '<' + genericDecls + "> ";
}
Thing method = new Thing("method");
method.put("name", name);
method.put("returnType", returnType);
method.put("abstract", isAbstract);
method.put("nullBody", nullBody);
method.put("modifiers", modifiers); // do not normalize; already "" or has ' ' at end
method.put("argDecls", normalizeList(argDecls));
method.put("args", normalizeList(args));
method.put("genericDecls", genericDecls);
method.put("throwsClause", throwsClause);
return method;
}