diff -r 000000000000 -r 6474c204b198 rdf/base/idl/nsIRDFService.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rdf/base/idl/nsIRDFService.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,146 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+#include "nsIRDFResource.idl"
+#include "nsIRDFLiteral.idl"
+#include "nsIRDFDataSource.idl"
+
+
+/**
+ * The RDF service interface. This is a singleton object which should be
+ * obtained from the <code>nsServiceManager</code>.
+ */
+[scriptable, uuid(BFD05261-834C-11d2-8EAC-00805F29F370)]
+interface nsIRDFService : nsISupports {
+    /**
+     * Construct an RDF resource from a single-byte URI. <code>nsIRDFService</code>
+     * caches resources that are in-use, so multiple calls to <code>GetResource()</code>
+     * for the same <code>uri</code> will return identical pointers. FindResource
+     * is used to find out whether there already exists a resource corresponding to that url.
+     */
+    nsIRDFResource GetResource(in AUTF8String aURI);
+
+    /**
+     * Construct an RDF resource from a Unicode URI. This is provided
+     * as a convenience method, allowing automatic, in-line C++
+     * conversion from <code>nsString</code> objects. The <code>uri</code> will
+     * be converted to a single-byte representation internally.
+     */
+    nsIRDFResource GetUnicodeResource(in AString aURI);
+
+    nsIRDFResource GetAnonymousResource();
+
+    /**
+     * Construct an RDF literal from a Unicode string.
+     */
+    nsIRDFLiteral  GetLiteral(in wstring aValue);
+
+    /**
+     * Construct an RDF literal from a PRTime.
+     */
+    nsIRDFDate     GetDateLiteral(in PRTime aValue);
+
+    /**
+     * Construct an RDF literal from an int.
+     */
+    nsIRDFInt      GetIntLiteral(in long aValue);
+
+    /**
+     * Construct an RDF literal from a data blob
+     */
+    [noscript] nsIRDFBlob getBlobLiteral(in const_octet_ptr aValue, in long aLength);
+
+    boolean IsAnonymousResource(in nsIRDFResource aResource);
+
+    /**
+     * Registers a resource with the RDF system, making it unique w.r.t.
+     * GetResource.
+     *
+     * An implementation of nsIRDFResource should call this in its
+     * Init() method if it wishes the resource to be globally unique
+     * (which is usually the case).
+     *
+     * @note that the resource will <i>not</i> be ref-counted by the
+     * RDF service: the assumption is that the resource implementation
+     * will call nsIRDFService::UnregisterResource() when the last
+     * reference to the resource is released.
+     *
+     * @note that the nsIRDFService implementation may choose to
+     * maintain a reference to the resource's URI; therefore, the
+     * resource implementation should ensure that the resource's URI
+     * (accessible via nsIRDFResource::GetValue(const char* *aURI)) is
+     * valid before calling RegisterResource(). Furthermore, the
+     * resource implementation should ensure that this pointer
+     * <i>remains</i> valid for the lifetime of the resource. (The
+     * implementation of the resource cache in nsIRDFService uses the
+     * URI maintained "internally" in the resource as a key into the
+     * cache rather than copying the resource URI itself.)
+     */
+    void RegisterResource(in nsIRDFResource aResource, in boolean aReplace);
+
+    /**
+     * Called to notify the resource manager that a resource is no
+     * longer in use. This method should only be called from the
+     * destructor of a "custom" resource implementation to notify the
+     * RDF service that the last reference to the resource has been
+     * released, so the resource is no longer valid.
+     *
+     * @note As mentioned in nsIRDFResourceFactory::CreateResource(),
+     * the RDF service will use the result of
+     * nsIRDFResource::GetValue() as a key into its cache. For this
+     * reason, you must always un-cache the resource <b>before</b>
+     * releasing the storage for the <code>const char*</code> URI.
+     */
+    void UnregisterResource(in nsIRDFResource aResource);
+
+    /**
+     * Register a <i>named data source</i>. The RDF service will call
+     * <code>nsIRDFDataSource::GetURI()</code> to determine the URI under
+     * which to register the data source.
+     *
+     * @note that the data source will <i>not</i> be refcounted by the
+     * RDF service! The assumption is that an RDF data source
+     * registers with the service once it is initialized (via
+     * <code>nsIRDFDataSource::Init()</code>), and unregisters when the
+     * last reference to the data source is released.
+     */
+    void RegisterDataSource(in nsIRDFDataSource aDataSource,
+                            in boolean          aReplace);
+
+    /**
+     * Unregister a <i>named data source</i>. The RDF service will call
+     * <code>nsIRDFDataSource::GetURI()</code> to determine the URI under which the
+     * data source was registered.
+     */
+    void UnregisterDataSource(in nsIRDFDataSource aDataSource);
+
+    /**
+     * Get the <i>named data source</i> corresponding to the URI. If a data
+     * source has been registered via <code>RegisterDataSource()</code>, that
+     * data source will be returned.
+     *
+     * If no data source is currently
+     * registered for the specified URI, and a data source <i>constructor</i>
+     * function has been registered via <code>RegisterDatasourceConstructor()</code>,
+     * the RDF service will call the constructor to attempt to construct a
+     * new data source. If construction is successful, the data source will
+     * be initialized via <code>nsIRDFDataSource::Init()</code>.
+     */
+    nsIRDFDataSource GetDataSource(in string aURI);
+
+    /**
+     * Same as GetDataSource, but if a remote/XML data source needs to be
+     * constructed, then this method will issue a <b>blocking</b> Refresh
+     * call on that data source.
+     */
+    nsIRDFDataSource GetDataSourceBlocking(in string aURI);
+};
+
+%{C++
+extern nsresult
+NS_NewRDFService(nsIRDFService** result);
+%}
+