public virtual void CreateEntryClass(PersistenceContext context, string className
, string[] fieldNames, string[] fieldTypes)
{
LogMethodCall("createEntryClass", context, className);
var repository = Repository(context);
repository.DefineClass(className, fieldNames, fieldTypes);
UpdateMetadata(context, repository);
}
private void MarkIndexedField(PersistenceContext context, string className, string
fieldName, bool indexed)
{
CustomField field = CustomClass(context, className).CustomField(fieldName);
field.Indexed(indexed);
UpdateMetadata(context, field);
Restart(context);
}
// TODO Auto-generated method stub
public virtual void InitContext(PersistenceContext context)
{
LogMethodCall("initContext", context);
var metadata = OpenMetadata(context.Url());
try
{
var repository = InitializeClassRepository(metadata);
var reflector = new CustomReflector(repository);
var data = OpenData(reflector, context.Url());
context.SetProviderContext(new MyContext(repository, metadata
, data));
}
catch (Exception e)
{
Runtime.PrintStackTrace(e);
// make sure metadata container is not left open
// in case something goes wrong with the setup
CloseIgnoringExceptions(metadata);
// cant use exception chaining here because the
// test must run in jdk 1.1
throw new Db4oException(e);
}
}
private CustomClass CustomClass(PersistenceContext context, string className)
{
return(Repository(context).ForName(className));
}
public virtual int Delete(PersistenceContext context, string className, object uid
)
{
// TODO Auto-generated method stub
return 0;
}
public virtual void CreateIndex(PersistenceContext context, string className, string
fieldName)
{
MarkIndexedField(context, className, fieldName, true);
}
private void UpdateMetadata(PersistenceContext context, object metadata)
{
Store(MetadataContainer(context), metadata);
}
private IQuery NewQuery(PersistenceContext context, string className)
{
var query = DataContainer(context).Query();
AddClassConstraint(context, query, className);
return query;
}
private IObjectContainer MetadataContainer(PersistenceContext context)
{
return My(context).metadata;
}
public virtual void TearDown()
{
ShutdownProvider(true);
_context = null;
}
private void InitializeContext()
{
_context = new PersistenceContext(DataFile());
}
private Db4oPersistenceProvider.MyContext My(PersistenceContext context)
{
return ((Db4oPersistenceProvider.MyContext)context.GetProviderContext());
}
private IObjectContainer MetadataContainer(PersistenceContext context)
{
return(My(context).metadata);
}
public virtual IObjectContainer DataContainer(PersistenceContext context)
{
return(My(context).data);
}
private Db4oPersistenceProvider.MyContext My(PersistenceContext context)
{
return((Db4oPersistenceProvider.MyContext)context.GetProviderContext());
}
private MyContext My(PersistenceContext context)
{
return ((MyContext) context.GetProviderContext());
}
public virtual IObjectContainer DataContainer(PersistenceContext context)
{
return My(context).data;
}
public virtual IEnumerator Select(PersistenceContext context, PersistentEntryTemplate
template)
{
LogMethodCall("select", context, template);
var query = QueryFromTemplate(context, template);
return new ObjectSetIterator(query.Execute());
}
private IQuery QueryFromTemplate(PersistenceContext context, PersistentEntryTemplate
template)
{
var query = NewQuery(context, template.className);
AddFieldConstraints(query, template);
return query;
}
public virtual void Update(PersistenceContext context, PersistentEntry entry)
{
var existing = SelectByUid(context, entry.className, entry.uid);
existing.fieldValues = entry.fieldValues;
DataContainer(context).Store(existing);
}
private CustomClassRepository Repository(PersistenceContext context)
{
return My(context).repository;
}
public virtual void CloseContext(PersistenceContext context)
{
LogMethodCall("closeContext", context);
var customContext = My(context);
if (null != customContext)
{
CloseIgnoringExceptions(customContext.metadata);
CloseIgnoringExceptions(customContext.data);
context.SetProviderContext(null);
}
}
private void Restart(PersistenceContext context)
{
CloseContext(context);
InitContext(context);
}
private PersistentEntry SelectByUid(PersistenceContext context, string className,
object uid)
{
var query = NewQuery(context, className);
query.Descend("uid").Constrain(uid);
return (PersistentEntry) query.Execute().Next();
}
public virtual void DropIndex(PersistenceContext context, string className, string
fieldName)
{
MarkIndexedField(context, className, fieldName, false);
}
private void AddClassConstraint(PersistenceContext context, IQuery query, string
className)
{
query.Constrain(CustomClass(context, className));
}
public virtual void DropEntryClass(PersistenceContext context, string className)
{
}
private CustomClass CustomClass(PersistenceContext context, string className)
{
return Repository(context).ForName(className);
}
public virtual void Insert(PersistenceContext context, PersistentEntry entry)
{
LogMethodCall("insert", context, entry);
// clone the entry because clients are allowed to reuse
// entry objects
DataContainer(context).Store(Clone(entry));
}
private void AddClassConstraint(PersistenceContext context, IQuery query, string
className)
{
query.Constrain(CustomClass(context, className));
}
