1 files changed, 91 insertions, 0 deletions
diff --git a/aai-core/src/main/java/org/onap/aai/restcore/search/GremlinGroovyShellSingleton.java b/aai-core/src/main/java/org/onap/aai/restcore/search/GremlinGroovyShellSingleton.java
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+++ b/aai-core/src/main/java/org/onap/aai/restcore/search/GremlinGroovyShellSingleton.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.aai.restcore.search;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
+import org.codehaus.groovy.ast.ClassHelper;
+import org.codehaus.groovy.ast.expr.ClassExpression;
+import org.codehaus.groovy.ast.expr.PropertyExpression;
+import org.codehaus.groovy.control.CompilerConfiguration;
+import org.codehaus.groovy.control.customizers.ASTTransformationCustomizer;
+import org.codehaus.groovy.control.customizers.ImportCustomizer;
+
+import groovy.lang.Binding;
+import groovy.lang.GroovyShell;
+import groovy.lang.Script;
+import groovy.transform.TimedInterrupt;
+
+/**
+ * Creates and returns a groovy shell with the
+ * configuration to statically import graph classes
+ *
+ */
+public class GremlinGroovyShellSingleton {
+
+	private final GroovyShell shell;
+	private GremlinGroovyShellSingleton() {
+		Map<String, Object> parameters = new HashMap<>();
+		parameters.put("value", 30000);
+		parameters.put("unit", new PropertyExpression(new ClassExpression(ClassHelper.make(TimeUnit.class)),"MILLISECONDS"));
+
+		ASTTransformationCustomizer custom = new ASTTransformationCustomizer(parameters, TimedInterrupt.class);
+		ImportCustomizer imports = new ImportCustomizer();
+		imports.addStaticStars(
+            "org.apache.tinkerpop.gremlin.process.traversal.P"
+		);
+		imports.addImports(
+				"org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__",
+				"org.apache.tinkerpop.gremlin.structure.T",
+				"org.apache.tinkerpop.gremlin.process.traversal.P",
+				"java.util.Map.Entry");
+		imports.addStarImports("java.util");
+		CompilerConfiguration config = new CompilerConfiguration();
+		config.addCompilationCustomizers(custom, imports);
+
+		this.shell = new GroovyShell(config);
+	}
+	
+	 private static class Helper {
+		 private static final GremlinGroovyShellSingleton INSTANCE = new GremlinGroovyShellSingleton();
+	 }
+
+	 public static GremlinGroovyShellSingleton getInstance() {
+		 
+		 return Helper.INSTANCE;
+	 }
+
+	/** 
+	 * @param traversal
+	 * @param params
+	 * @return result of graph traversal
+	 */
+	public GraphTraversal<?, ?> executeTraversal (String traversal, Map<String, Object> params) {
+		Binding binding = new Binding(params);
+		Script script = shell.parse(traversal);
+		script.setBinding(binding);
+		return (GraphTraversal<?, ?>) script.run();
+	}
+}