1 files changed, 86 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/util/EclipseCollectionsBagMemory.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/util/EclipseCollectionsBagMemory.java
new file mode 100644
index 00000000..e24b2448
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/util/EclipseCollectionsBagMemory.java
@@ -0,0 +1,86 @@
+/*******************************************************************************
+ * Copyright (c) 2004-2008 Gabor Bergmann 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.matchers.util;
+
+import java.util.Iterator;
+import java.util.Set;
+import java.util.function.BiConsumer;
+
+import org.eclipse.collections.impl.map.mutable.primitive.ObjectIntHashMap;
+
+/**
+ * Eclipse Collections-based multiset for tuples. Can contain duplicate occurrences of the same matching.
+ * 
+ * <p>Inherits Eclipse Collections' Object-to-Int primitive hashmap and counts the number of occurrences of each value. 
+ * Element is deleted if # of occurences drops to 0.
+ * 
+ * @author Gabor Bergmann.
+ * @since 1.7
+ * @noreference
+ */
+public abstract class EclipseCollectionsBagMemory<T> extends ObjectIntHashMap<T> implements IMemory<T> {
+
+    public EclipseCollectionsBagMemory() {
+        super();
+    }
+
+    @Override
+    public int getCount(T value) {
+        return super.getIfAbsent(value, 0);
+    }
+    @Override
+    public int getCountUnsafe(Object value) {
+        return super.getIfAbsent(value, 0);
+    }
+    @Override
+    public boolean containsNonZero(T value) {
+        return super.containsKey(value);
+    }
+    @Override
+    public boolean containsNonZeroUnsafe(Object value) {
+        return super.containsKey(value);
+    }
+
+    @Override
+    public void clearAllOf(T value) {
+        super.remove(value);
+    }
+
+
+    @Override
+    public Iterator<T> iterator() {
+        return super.keySet().iterator();
+    }
+
+    @Override
+    public String toString() {
+        return "TM" + super.toString();
+    }
+    
+    @Override
+    public Set<T> distinctValues() {
+        return super.keySet();
+    }
+
+    @Override
+    public void forEachEntryWithMultiplicities(BiConsumer<T, Integer> entryConsumer) {
+        super.forEachKeyValue(entryConsumer::accept);
+    }
+    
+    @Override
+    public int hashCode() {
+        return IMemoryView.hashCode(this);
+    }
+    @Override
+    public boolean equals(Object obj) {
+        return IMemoryView.equals(this, obj);
+    }
+
+}