1 files changed, 68 insertions, 0 deletions

diff --git a/Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/base/DseIdPoolHelper.java b/Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/base/DseIdPoolHelper.java
new file mode 100644
index 00000000..f6fee7be
--- /dev/null
+++ b/Solvers/VIATRA-Solver/org.eclipse.viatra.dse/src/org/eclipse/viatra/dse/base/DseIdPoolHelper.java
@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, Andras Szabolcs Nagy 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 org.eclipse.viatra.dse.base;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.eclipse.viatra.dse.api.DSEException;
+import org.eclipse.viatra.transformation.runtime.emf.rules.batch.BatchTransformationRule;
+
+public enum DseIdPoolHelper {
+
+    INSTANCE;
+    
+    public static interface IGetRuleExecutions {
+        int getRuleExecutions(BatchTransformationRule<?, ?> rule);
+    }
+
+    public static class IdProvider {
+
+        private final BatchTransformationRule<?, ?> rule;
+        private IGetRuleExecutions getRuleExecutions;
+
+        public IdProvider(IGetRuleExecutions getRuleExecutions, BatchTransformationRule<?, ?> rule) {
+            this.getRuleExecutions = getRuleExecutions;
+            this.rule = rule;
+        }
+
+        public int getId() {
+            return getRuleExecutions.getRuleExecutions(rule);
+        }
+
+    }
+
+    private ConcurrentHashMap<Thread, HashMap<BatchTransformationRule<?, ?>, IdProvider>> idProviders = new ConcurrentHashMap<>();
+
+    public int getId(BatchTransformationRule<?, ?> rule) {
+        Thread currentThread = Thread.currentThread();
+        HashMap<BatchTransformationRule<?, ?>, IdProvider> ruleMap = idProviders.get(currentThread);
+        if (ruleMap == null) {
+            throw new DSEException("There is no registered id provider");
+        }
+        IdProvider idProvider = ruleMap.get(rule);
+        return idProvider.getId();
+    }
+
+    public void registerRules(IGetRuleExecutions getRuleExecutions, Collection<BatchTransformationRule<?, ?>> rules) {
+        Thread currentThread = Thread.currentThread();
+        HashMap<BatchTransformationRule<?, ?>, IdProvider> ruleMap = new HashMap<>();
+        for (BatchTransformationRule<?, ?> rule : rules) {
+            IdProvider idProvider = new IdProvider(getRuleExecutions, rule);
+            ruleMap.put(rule, idProvider);
+        }
+        idProviders.put(currentThread, ruleMap);
+    }
+
+    public void disposeByThread() {
+        Thread currentThread = Thread.currentThread();
+        idProviders.remove(currentThread);
+    }
+}