+/*******************************************************************************
+ * Copyright (c) 2019 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Semantum Oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common.request;
+
+import java.util.Collections;
+import java.util.Set;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+
+import gnu.trove.set.hash.THashSet;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.41.0, 1.35.2
+ */
+public class ResourceSetURIs extends UnaryRead<Set<Resource>, Set<String>> {
+
+ public ResourceSetURIs(Set<Resource> set) {
+ super(set);
+ }
+
+ @Override
+ public Set<String> perform(ReadGraph graph) throws DatabaseException {
+ if (parameter == null || parameter.isEmpty())
+ return Collections.emptySet();
+
+ Set<String> result = new THashSet<String>(parameter.size());
+ for (Resource r : parameter) {
+ String uri = graph.getPossibleURI(r);
+ if (uri != null)
+ result.add(uri);
+ }
+
+ return result;
+ }
+
+}
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