/**
* Constructs a new descriptor for the specified class. When describing inheritence, the
* descriptor of the parent class should be used and only the fields added in this object must be
* supplied here.
*
* @param javaClass The Java type of this class
* @param fields The fields described for this class
* @param identity The field of the identity (key) of this class, may be null
* @param extend The descriptor of the class which this class extends,
* @param accessMode The access mode for this class (null is shared) or null if this is a
* top-level class
* @throws MappingException The extended descriptor does not match a parent class of this type
*/
public ClassDescriptorImpl(
Class javaClass,
FieldDescriptor[] fields,
FieldDescriptor identity,
ClassDescriptor extend,
AccessMode accessMode)
throws MappingException {
if (!Types.isConstructable(javaClass))
throw new MappingException("mapping.classNotConstructable", javaClass.getName());
_javaClass = javaClass;
if (fields == null) throw new IllegalArgumentException("Argument 'fields' is null");
_fields = (FieldDescriptor[]) fields.clone();
if (extend != null) {
if (!extend.getJavaClass().isAssignableFrom(javaClass))
throw new MappingException(
"mapping.classDoesNotExtend", _javaClass.getName(), extend.getJavaClass().getName());
_extends = extend;
_identity = (identity == null ? _extends.getIdentity() : identity);
} else {
_extends = null;
_identity = identity;
}
_accessMode = accessMode;
}
protected ClassDescriptor createDescriptor(ClassMapping clsMap) throws MappingException {
ClassDescriptor clsDesc;
FieldDescriptor[] fields;
Vector jdoFields;
// If no LDAP information for class, ignore it. DAX only
// supports DAX class descriptors.
if (clsMap.getMapTo() == null || clsMap.getMapTo().getLdapOc() == null) return NoDescriptor;
// See if we have a compiled descriptor.
clsDesc = loadClassDescriptor(clsMap.getName());
if (clsDesc != null && clsDesc instanceof DAXClassDescriptor) return clsDesc;
// Use super class to create class descriptor. Field descriptors will be
// generated only for supported fields, see createFieldDesc later on.
// This class may only extend a DAX class, otherwise no mapping will be
// found for the parent.
clsDesc = super.createDescriptor(clsMap);
// DAX descriptor must include an identity field, the identity field
// is either a field, or a container field containing only DAX fields.
// If the identity field is not a JDO field, it will be cleaned later
// on (we need the descriptor for relations mapping).
if (clsDesc.getIdentity() == null)
throw new MappingException("mapping.noIdentity", clsDesc.getJavaClass().getName());
/*
if ( clsDesc.getIdentity() instanceof ContainerFieldDesc ) {
FieldDescriptor[] idFields;
idFields = ( (ContainerFieldDesc) clsDesc.getIdentity() ).getFields();
for ( int i = 0 ; i < idFields.length ; ++i )
if ( ! ( idFields[ i ] instanceof DAXFieldDesc ) )
throw new MappingException( "dax.identityNotDAX", idFields[ i ] );
}
*/
return new DAXClassDescriptor(clsDesc, clsMap.getMapTo().getLdapOc(), null);
}
