1 files changed, 143 insertions, 0 deletions
diff --git a/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/enevent/ApexEvent2EnEventConverter.java b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/enevent/ApexEvent2EnEventConverter.java
new file mode 100644
index 000000000..90a19fff2
--- /dev/null
+++ b/services/services-engine/src/main/java/org/onap/policy/apex/service/engine/event/impl/enevent/ApexEvent2EnEventConverter.java
@@ -0,0 +1,143 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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.service.engine.event.impl.enevent;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onap.policy.apex.service.engine.event.ApexEvent;
+import org.onap.policy.apex.service.engine.event.ApexEventConverter;
+import org.onap.policy.apex.service.engine.event.ApexEventException;
+import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
+import org.slf4j.ext.XLogger;
+import org.slf4j.ext.XLoggerFactory;
+
+import org.onap.policy.apex.core.engine.engine.ApexEngine;
+import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
+import org.onap.policy.apex.model.basicmodel.service.ModelService;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
+import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
+
+/**
+ * The Class ApexEvent2EnEventConverter converts externally facing {@link ApexEvent} instances to
+ * and from instances of {@link EnEvent} that are used internally in the Apex engine core.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public final class ApexEvent2EnEventConverter implements ApexEventConverter {
+    private static final XLogger LOGGER = XLoggerFactory.getXLogger(ApexEvent2EnEventConverter.class);
+
+    // The Apex engine with its event definitions
+    private final ApexEngine apexEngine;
+
+    /**
+     * Set up the event converter.
+     *
+     * @param apexEngine The engine to use to create events to be converted
+     */
+    public ApexEvent2EnEventConverter(final ApexEngine apexEngine) {
+        this.apexEngine = apexEngine;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see
+     * org.onap.policy.apex.service.engine.event.ApexEventConverter#toApexEvent(java.lang.String,
+     * java.lang.Object)
+     */
+    @Override
+    public List<ApexEvent> toApexEvent(final String eventName, final Object event) throws ApexException {
+        // Check the Engine event
+        if (event == null) {
+            LOGGER.warn("event processing failed, engine event is null");
+            throw new ApexEventException("event processing failed, engine event is null");
+        }
+
+        // Cast the event to an Engine event event, if our conversion is correctly configured, this
+        // cast should always work
+        EnEvent enEvent = null;
+        try {
+            enEvent = (EnEvent) event;
+        } catch (final Exception e) {
+            final String errorMessage = "error transferring event \"" + event + "\" to the Apex engine";
+            LOGGER.debug(errorMessage, e);
+            throw new ApexEventRuntimeException(errorMessage, e);
+        }
+
+        // Create the Apex event
+        final AxEvent axEvent = enEvent.getAxEvent();
+        final ApexEvent apexEvent = new ApexEvent(axEvent.getKey().getName(), axEvent.getKey().getVersion(),
+                axEvent.getNameSpace(), axEvent.getSource(), axEvent.getTarget());
+
+        // Copy the ExecutionID from the EnEvent into the ApexEvent
+        apexEvent.setExecutionID(enEvent.getExecutionID());
+
+        // Copy he exception message to the Apex event if it is set
+        if (enEvent.getExceptionMessage() != null) {
+            apexEvent.setExceptionMessage(enEvent.getExceptionMessage());
+        }
+
+        // Set the data on the apex event
+        apexEvent.putAll(enEvent);
+
+        // Return the event in a single element
+        final ArrayList<ApexEvent> eventList = new ArrayList<ApexEvent>();
+        eventList.add(apexEvent);
+        return eventList;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see
+     * org.onap.policy.apex.service.engine.event.ApexEventConverter#fromApexEvent(org.onap.policy.
+     * apex.service.engine.event.ApexEvent)
+     */
+    @Override
+    public EnEvent fromApexEvent(final ApexEvent apexEvent) throws ApexException {
+        // Check the Apex model
+        if (apexEngine == null) {
+            LOGGER.warn("event processing failed, apex engine is null");
+            throw new ApexEventException("event processing failed, apex engine is null");
+        }
+
+        // Get the event definition
+        final AxEvent eventDefinition = ModelService.getModel(AxEvents.class).get(apexEvent.getName());
+        if (eventDefinition == null) {
+            LOGGER.warn("event processing failed, event \"" + apexEvent.getName() + "\" not found in apex model");
+            throw new ApexEventException(
+                    "event processing failed, event \"" + apexEvent.getName() + "\" not found in apex model");
+        }
+
+        // Create the internal engine event
+        final EnEvent enEvent = apexEngine.createEvent(eventDefinition.getKey());
+
+        // Set the data on the engine event
+        enEvent.putAll(apexEvent);
+
+        // copy the ExecutionID from the ApexEvent into the EnEvent
+        enEvent.setExecutionID(apexEvent.getExecutionID());
+
+        return enEvent;
+    }
+}