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Factor interfaces into individual .idl files. Add purge support and re-load support to RDF/XML datasource.

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This commit is contained in:
waterson@netscape.com
1999-05-05 03:09:12 +00:00
parent 76679fcbeb
commit 1828e02ca2
8 changed files with 576 additions and 548 deletions
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74
rdf/base/src/nsCompositeDataSource.cpp
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@@ -1111,45 +1111,60 @@ CompositeDataSourceImpl::DoCommand(nsISupportsArray/*<nsIRDFResource>*/* aSource
// need to add the observers of the CompositeDataSourceImpl to the new data source.
NS_IMETHODIMP
CompositeDataSourceImpl::AddDataSource(nsIRDFDataSource* source)
CompositeDataSourceImpl::AddDataSource(nsIRDFDataSource* aDataSource)
{
NS_ASSERTION(source != nsnull, "null ptr");
if (! source)
NS_ASSERTION(aDataSource != nsnull, "null ptr");
if (! aDataSource)
return NS_ERROR_NULL_POINTER;
mDataSources.InsertElementAt(source, 0);
source->AddObserver(this);
NS_ADDREF(source);
mDataSources.AppendElement(aDataSource);
aDataSource->AddObserver(this);
NS_ADDREF(aDataSource);
return NS_OK;
}
NS_IMETHODIMP
CompositeDataSourceImpl::RemoveDataSource(nsIRDFDataSource* source)
CompositeDataSourceImpl::RemoveDataSource(nsIRDFDataSource* aDataSource)
{
NS_ASSERTION(source != nsnull, "null ptr");
if (! source)
NS_ASSERTION(aDataSource != nsnull, "null ptr");
if (! aDataSource)
return NS_ERROR_NULL_POINTER;
if (mDataSources.IndexOf(source) >= 0) {
mDataSources.RemoveElement(source);
source->RemoveObserver(this);
NS_RELEASE(source);
if (mDataSources.IndexOf(aDataSource) >= 0) {
mDataSources.RemoveElement(aDataSource);
aDataSource->RemoveObserver(this);
NS_RELEASE(aDataSource);
}
return NS_OK;
}
NS_IMETHODIMP
CompositeDataSourceImpl::OnAssert(nsIRDFResource* subject,
nsIRDFResource* predicate,
nsIRDFNode* object)
CompositeDataSourceImpl::OnAssert(nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget)
{
// Make sure that the assertion isn't masked by another
// datasource.
//
// XXX We could make this more efficient if we knew _which_
// datasource actually served up the OnAssert(): we could use
// HasAssertionN() to only search datasources _before_ the
// datasource that coughed up the assertion.
nsresult rv;
PRBool hasAssertion;
rv = HasAssertion(aSource, aProperty, aTarget, PR_TRUE, &hasAssertion);
if (NS_FAILED(rv)) return rv;
if (! hasAssertion)
return NS_OK;
if (mObservers) {
for (PRInt32 i = mObservers->Count() - 1; i >= 0; --i) {
nsIRDFObserver* obs = (nsIRDFObserver*) mObservers->ElementAt(i);
obs->OnAssert(subject, predicate, object);
obs->OnAssert(aSource, aProperty, aTarget);
// XXX ignore return value?
}
}
@@ -1157,14 +1172,31 @@ CompositeDataSourceImpl::OnAssert(nsIRDFResource* subject,
}
NS_IMETHODIMP
CompositeDataSourceImpl::OnUnassert(nsIRDFResource* subject,
nsIRDFResource* predicate,
nsIRDFNode* object)
CompositeDataSourceImpl::OnUnassert(nsIRDFResource* aSource,
nsIRDFResource* aProperty,
nsIRDFNode* aTarget)
{
// Make sure that the un-assertion doesn't just unmask the
// same assertion in a different datasource.
//
// XXX We could make this more efficient if we knew _which_
// datasource actually served up the OnAssert(): we could use
// HasAssertionN() to only search datasources _before_ the
// datasource that coughed up the assertion.
//
// XXX What if the unassertion
nsresult rv;
PRBool hasAssertion;
rv = HasAssertion(aSource, aProperty, aTarget, PR_TRUE, &hasAssertion);
if (NS_FAILED(rv)) return rv;
if (hasAssertion)
return NS_OK;
if (mObservers) {
for (PRInt32 i = mObservers->Count() - 1; i >= 0; --i) {
nsIRDFObserver* obs = (nsIRDFObserver*) mObservers->ElementAt(i);
obs->OnUnassert(subject, predicate, object);
obs->OnUnassert(aSource, aProperty, aTarget);
// XXX ignore return value?
}
}