if the resource doesn't exist add otherwise update

li.strolch.service/src/main/java/li/strolch/service/AddOrUpdateResourceService.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2017 Reto Breitenmoser <reto.breitenmoser@gmail.com>
+ * 
+ * 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.
+ */
+package li.strolch.service;
+
+import li.strolch.command.AddResourceCommand;
+import li.strolch.command.UpdateResourceCommand;
+import li.strolch.model.Resource;
+import li.strolch.persistence.api.StrolchTransaction;
+import li.strolch.service.api.AbstractService;
+import li.strolch.service.api.ServiceArgument;
+import li.strolch.service.api.ServiceResult;
+import li.strolch.service.api.ServiceResultState;
+
+/**
+ * @author Reto Breitenmoser <reto.breitenmoser@gmail.com>
+ */
+public class AddOrUpdateResourceService extends AbstractService<AddOrUpdateResourceService.AddOrUpdateResourceArg, ServiceResult> {
+
+	private static final long serialVersionUID = 1L;
+
+	@Override
+	protected ServiceResult getResultInstance() {
+		return new ServiceResult(ServiceResultState.FAILED);
+	}
+
+	@Override
+	protected ServiceResult internalDoService(AddOrUpdateResourceArg arg) {
+
+		try (StrolchTransaction tx = openArgOrUserTx(arg)) {
+			if (tx.getResourceMap().hasElement(tx, arg.resource.getType(), arg.resource.getId())) {
+				UpdateResourceCommand updateCmd = new UpdateResourceCommand(getContainer(), tx);
+				updateCmd.setResource(arg.resource);
+				tx.addCommand(updateCmd);
+			} else {
+				AddResourceCommand addCmd = new AddResourceCommand(getContainer(), tx);
+				addCmd.setResource(arg.resource);
+				tx.addCommand(addCmd);
+			}
+		}
+
+		return ServiceResult.success();
+	}
+
+	public static class AddOrUpdateResourceArg extends ServiceArgument {
+		private static final long serialVersionUID = 1L;
+		public Resource resource;
+	}
+}