1 files changed, 82 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/api/GenericQueryGroup.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/api/GenericQueryGroup.java
new file mode 100644
index 00000000..a5661bc9
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/api/GenericQueryGroup.java
@@ -0,0 +1,82 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2012, Mark Czotter, Istvan Rath and Daniel Varro
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-v20.html.
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+package tools.refinery.viatra.runtime.api;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import tools.refinery.viatra.runtime.api.impl.BaseQueryGroup;
+
+/**
+ * Generic implementation of {@link IQueryGroup}, covering an arbitrarily chosen set of patterns. Use the public
+ * constructor or static GenericQueryGroup.of(...) methods to instantiate.
+ * 
+ * @author Mark Czotter
+ * 
+ */
+public class GenericQueryGroup extends BaseQueryGroup {
+
+    private final Set<IQuerySpecification<?>> patterns;
+
+    /**
+     * Creates a GenericQueryGroup object with a set of patterns.
+     * 
+     * @param patterns
+     */
+    public GenericQueryGroup(Set<IQuerySpecification<?>> patterns) {
+        this.patterns = patterns;
+    }
+
+    @Override
+    public Set<IQuerySpecification<?>> getSpecifications() {
+        return patterns;
+    }
+
+    /**
+     * Creates a generic {@link IQueryGroup} instance from {@link IQuerySpecification} objects.
+     * 
+     * @since 2.0
+     */
+    public static IQueryGroup of(Stream<IQuerySpecification<?>> querySpecifications) {
+        return new GenericQueryGroup(querySpecifications.collect(Collectors.toSet()));
+    }
+    
+    /**
+     * Creates a generic {@link IQueryGroup} instance from {@link IQuerySpecification} objects.
+     * 
+     * @param querySpecifications
+     */
+    public static IQueryGroup of(Set<IQuerySpecification<?>> querySpecifications) {
+        return new GenericQueryGroup(querySpecifications);
+    }
+
+    /**
+     * Creates a generic {@link IQueryGroup} instance from {@link IQuerySpecification} objects.
+     * 
+     * @param querySpecifications
+     */
+    public static IQueryGroup of(IQuerySpecification<?>... querySpecifications) {
+        return of(new HashSet<IQuerySpecification<?>>(Arrays.asList(querySpecifications)));
+    }
+
+    /**
+     * Creates a generic {@link IQueryGroup} instance from other {@link IQueryGroup} objects (subgroups).
+     * 
+     */
+    public static IQueryGroup of(IQueryGroup... subGroups) {
+        Set<IQuerySpecification<?>> patterns = new HashSet<IQuerySpecification<?>>();
+        for (IQueryGroup group : subGroups) {
+            patterns.addAll(group.getSpecifications());
+        }
+        return new GenericQueryGroup(patterns);
+    }
+}