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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+/* -*- 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 "nsIRDFDataSource.idl"
+
+interface nsISimpleEnumerator;
+
+/**
+ * An nsIRDFCompositeDataSource composes individual data sources, providing
+ * the illusion of a single, coherent RDF graph.
+ */
+[scriptable, uuid(96343820-307C-11D2-BC15-00805F912FE7)]
+interface nsIRDFCompositeDataSource : nsIRDFDataSource {
+
+ /**
+ *
+ * Set this value to <code>true</code> if the composite datasource
+ * may contains at least one datasource that has <em>negative</em>
+ * assertions. (This is the default.)
+ *
+ * Set this value to <code>false</code> if none of the datasources
+ * being composed contains a negative assertion. This allows the
+ * composite datasource to perform some query optimizations.
+ *
+ * By default, this value is <code>true</true>.
+ */
+ attribute boolean allowNegativeAssertions;
+
+ /**
+ * Set to <code>true</code> if the composite datasource should
+ * take care to coalesce duplicate arcs when returning values from
+ * queries. (This is the default.)
+ *
+ * Set to <code>false</code> if the composite datasource shouldn't
+ * bother to check for duplicates. This allows the composite
+ * datasource to more efficiently answer queries.
+ *
+ * By default, this value is <code>true</code>.
+ */
+ attribute boolean coalesceDuplicateArcs;
+
+ /**
+ * Add a datasource the the composite data source.
+ * @param aDataSource the datasource to add to composite
+ */
+ void AddDataSource(in nsIRDFDataSource aDataSource);
+
+ /**
+ * Remove a datasource from the composite data source.
+ * @param aDataSource the datasource to remove from the composite
+ */
+ void RemoveDataSource(in nsIRDFDataSource aDataSource);
+
+ /**
+ * Retrieve the datasources in the composite data source.
+ * @return an nsISimpleEnumerator that will enumerate each
+ * of the datasources in the composite
+ */
+ nsISimpleEnumerator GetDataSources();
+};
+
+%{C++
+extern nsresult
+NS_NewRDFCompositeDataSource(nsIRDFCompositeDataSource** result);
+%}
+