/**
* Finds the map type for the specified type mirror, if it exists.
*
* @param typeMirror The type mirror.
* @param context The context
* @return The map type or null.
*/
public static MapType findMapType(TypeMirror typeMirror, EnunciateJacksonContext context) {
if (!(typeMirror instanceof DeclaredType)) {
return null;
}
DeclaredType declaredType = (DeclaredType) typeMirror;
TypeElement element = (TypeElement) declaredType.asElement();
if (element == null) {
return null;
} else {
String fqn = element.getQualifiedName().toString();
@SuppressWarnings("unchecked")
Map<String, MapType> mapTypes =
(Map<String, MapType>) context.getContext().getProperty(PROPERTY_MAP_TYPES);
if (mapTypes == null) {
mapTypes = new HashMap<String, MapType>();
context.getContext().setProperty(PROPERTY_MAP_TYPES, mapTypes);
}
MapType mapType = mapTypes.get(fqn);
if (mapType != null) {
return mapType;
} else {
DeclaredType declaredMapType = findMapTypeDeclaration(declaredType, context);
if (declaredMapType == null) {
return null;
}
MapType newMapType =
new MapType(declaredType, context.getContext().getProcessingEnvironment());
mapTypes.put(fqn, newMapType);
TypeMirror keyType = null;
TypeMirror valueType = null;
List<? extends TypeMirror> typeArgs = declaredMapType.getTypeArguments();
if ((typeArgs != null) && (typeArgs.size() == 2)) {
Iterator<? extends TypeMirror> argIt = typeArgs.iterator();
keyType = argIt.next();
valueType = argIt.next();
}
if ((keyType == null) || (valueType == null)) {
TypeMirror objectType =
TypeMirrorUtils.objectType(context.getContext().getProcessingEnvironment());
keyType = objectType;
valueType = objectType;
}
TypeMirror mapKeyType = findMapType(keyType, context);
newMapType.keyType = mapKeyType == null ? keyType : mapKeyType;
TypeMirror mapValueType = findMapType(valueType, context);
newMapType.valueType = mapValueType == null ? valueType : mapValueType;
return newMapType;
}
}
}
private static DeclaredType findMapTypeDeclaration(
TypeMirror typeMirror, EnunciateJacksonContext context) {
if (!(typeMirror instanceof DeclaredType)) {
return null;
}
DeclaredType declaredType = (DeclaredType) typeMirror;
TypeElement element = (TypeElement) declaredType.asElement();
String fqn = element.getQualifiedName().toString();
if (Map.class.getName().equals(fqn)) {
return declaredType;
}
AdapterType adapterType = JacksonUtil.findAdapterType(element, context);
if (adapterType != null) {
return findMapTypeDeclaration(adapterType.getAdaptingType(), context);
}
DeclaredType mapType = null;
Types typeUtils = context.getContext().getProcessingEnvironment().getTypeUtils();
List<? extends TypeMirror> supers = typeUtils.directSupertypes(declaredType);
for (TypeMirror superInterface : supers) {
mapType = findMapTypeDeclaration(superInterface, context);
if (mapType != null) {
break;
}
}
return mapType;
}