1 files changed, 103 insertions, 0 deletions
diff --git a/core/src/main/java/org/onap/policy/apex/core/engine/executor/context/AxStateFacade.java b/core/src/main/java/org/onap/policy/apex/core/engine/executor/context/AxStateFacade.java
new file mode 100644
index 000000000..75d2aa82f
--- /dev/null
+++ b/core/src/main/java/org/onap/policy/apex/core/engine/executor/context/AxStateFacade.java
@@ -0,0 +1,103 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2021 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.core.engine.executor.context;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import lombok.AllArgsConstructor;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.policymodel.concepts.AxState;
+import org.onap.policy.apex.model.policymodel.concepts.AxTasks;
+
+/**
+ * The Class AxStateFacade acts as a facade into the AxState class so that task logic can easily
+ * access information in an AxState instance.
+ *
+ * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
+ */
+@AllArgsConstructor
+public class AxStateFacade {
+    // CHECKSTYLE:OFF: checkstyle:visibilityModifier Logic has access to this field
+
+    /** The full definition information for the state. */
+    public final AxState state;
+
+    // CHECKSTYLE:ON: checkstyle:visibilityModifier
+
+    /**
+     * Gets the default task key of the state.
+     *
+     * @return the default task key
+     */
+    public AxArtifactKey getDefaultTaskKey() {
+        return state.getDefaultTask();
+    }
+
+    /**
+     * Gets the ID of the state.
+     *
+     * @return the ID
+     */
+    public String getId() {
+        return state.getKey().getId();
+    }
+
+    /**
+     * Gets the name of the state.
+     *
+     * @return the state name
+     */
+    public String getStateName() {
+        return state.getKey().getLocalName();
+    }
+
+    /**
+     * Check if a task is defined for a given task name on a state and, if so, return its key.
+     *
+     * @param taskName the name of the task to get
+     * @return the task key or null if it does not exist
+     */
+    public AxArtifactKey getTaskKey(final String taskName) {
+        if (taskName == null) {
+            return null;
+        }
+
+        return ModelService.getModel(AxTasks.class).get(taskName).getKey();
+    }
+
+    /**
+     * Check if a task is defined for a given task name on a state and, if so, return its key.
+     *
+     * @return unmodifiable list of names of tasks available
+     */
+    public List<String> getTaskNames() {
+        final Set<AxArtifactKey> tasks = state.getTaskReferences().keySet();
+        final List<String> ret = new ArrayList<>(tasks.size());
+        for (final AxArtifactKey task : tasks) {
+            ret.add(task.getName());
+        }
+        return Collections.unmodifiableList(ret);
+    }
+}