private Class determineType(
HierarchicalStreamReader reader,
boolean validField,
Object result,
String fieldName,
Class definedInCls) {
String classAttribute = reader.getAttribute(mapper.aliasForAttribute("class"));
Class fieldType = reflectionProvider.getFieldType(result, fieldName, definedInCls);
if (classAttribute != null) {
Class specifiedType = mapper.realClass(classAttribute);
if (fieldType.isAssignableFrom(specifiedType))
// make sure that the specified type in XML is compatible with the field type.
// this allows the code to evolve in more flexible way.
return specifiedType;
}
if (!validField) {
Class itemType = mapper.getItemTypeForItemFieldName(result.getClass(), fieldName);
if (itemType != null) {
return itemType;
} else {
return mapper.realClass(reader.getNodeName());
}
} else {
return mapper.defaultImplementationOf(fieldType);
}
}
private Map writeValueToImplicitCollection(
UnmarshallingContext context,
Object value,
Map implicitCollections,
Object result,
String itemFieldName) {
String fieldName =
mapper.getFieldNameForItemTypeAndName(
context.getRequiredType(), value.getClass(), itemFieldName);
if (fieldName != null) {
if (implicitCollections == null) {
implicitCollections = new HashMap(); // lazy instantiation
}
Collection collection = (Collection) implicitCollections.get(fieldName);
if (collection == null) {
Class fieldType =
mapper.defaultImplementationOf(
reflectionProvider.getFieldType(result, fieldName, null));
if (!Collection.class.isAssignableFrom(fieldType)) {
throw new ObjectAccessException(
"Field "
+ fieldName
+ " of "
+ result.getClass().getName()
+ " is configured for an implicit Collection, but field is of type "
+ fieldType.getName());
}
if (pureJavaReflectionProvider == null) {
pureJavaReflectionProvider = new PureJavaReflectionProvider();
}
collection = (Collection) pureJavaReflectionProvider.newInstance(fieldType);
reflectionProvider.writeField(result, fieldName, collection, null);
implicitCollections.put(fieldName, collection);
}
collection.add(value);
}
return implicitCollections;
}
public Object doUnmarshal(
final Object result,
final HierarchicalStreamReader reader,
final UnmarshallingContext context) {
final SeenFields seenFields = new SeenFields();
Iterator it = reader.getAttributeNames();
// Remember outermost Saveable encountered, for reporting below
if (result instanceof Saveable && context.get("Saveable") == null)
context.put("Saveable", result);
// Process attributes before recursing into child elements.
while (it.hasNext()) {
String attrAlias = (String) it.next();
String attrName = mapper.attributeForAlias(attrAlias);
Class classDefiningField = determineWhichClassDefinesField(reader);
boolean fieldExistsInClass = fieldDefinedInClass(result, attrName);
if (fieldExistsInClass) {
Field field = reflectionProvider.getField(result.getClass(), attrName);
SingleValueConverter converter =
mapper.getConverterFromAttribute(field.getDeclaringClass(), attrName, field.getType());
Class type = field.getType();
if (converter == null) {
converter = mapper.getConverterFromItemType(type);
}
if (converter != null) {
Object value = converter.fromString(reader.getAttribute(attrAlias));
if (type.isPrimitive()) {
type = Primitives.box(type);
}
if (value != null && !type.isAssignableFrom(value.getClass())) {
throw new ConversionException(
"Cannot convert type " + value.getClass().getName() + " to type " + type.getName());
}
reflectionProvider.writeField(result, attrName, value, classDefiningField);
seenFields.add(classDefiningField, attrName);
}
}
}
Map implicitCollectionsForCurrentObject = null;
while (reader.hasMoreChildren()) {
reader.moveDown();
try {
String fieldName = mapper.realMember(result.getClass(), reader.getNodeName());
boolean implicitCollectionHasSameName =
mapper.getImplicitCollectionDefForFieldName(result.getClass(), reader.getNodeName())
!= null;
Class classDefiningField = determineWhichClassDefinesField(reader);
boolean fieldExistsInClass =
!implicitCollectionHasSameName && fieldDefinedInClass(result, fieldName);
Class type =
determineType(reader, fieldExistsInClass, result, fieldName, classDefiningField);
final Object value;
if (fieldExistsInClass) {
Field field = reflectionProvider.getField(result.getClass(), fieldName);
value = unmarshalField(context, result, type, field);
// TODO the reflection provider should have returned the proper field in first place ....
Class definedType =
reflectionProvider.getFieldType(result, fieldName, classDefiningField);
if (!definedType.isPrimitive()) {
type = definedType;
}
} else {
value = context.convertAnother(result, type);
}
if (value != null && !type.isAssignableFrom(value.getClass())) {
LOGGER.warning(
"Cannot convert type " + value.getClass().getName() + " to type " + type.getName());
// behave as if we didn't see this element
} else {
if (fieldExistsInClass) {
reflectionProvider.writeField(result, fieldName, value, classDefiningField);
seenFields.add(classDefiningField, fieldName);
} else {
implicitCollectionsForCurrentObject =
writeValueToImplicitCollection(
context, value, implicitCollectionsForCurrentObject, result, fieldName);
}
}
} catch (NonExistentFieldException e) {
LOGGER.log(WARNING, "Skipping a non-existent field " + e.getFieldName(), e);
addErrorInContext(context, e);
} catch (CannotResolveClassException e) {
LOGGER.log(WARNING, "Skipping a non-existent type", e);
addErrorInContext(context, e);
} catch (LinkageError e) {
LOGGER.log(WARNING, "Failed to resolve a type", e);
addErrorInContext(context, e);
}
reader.moveUp();
}
// Report any class/field errors in Saveable objects
if (context.get("ReadError") != null && context.get("Saveable") == result) {
OldDataMonitor.report((Saveable) result, (ArrayList<Throwable>) context.get("ReadError"));
context.put("ReadError", null);
}
return result;
}
