1 files changed, 153 insertions, 0 deletions
diff --git a/sandbox/lresende/backup/company-das/src/main/java/das/DASServiceImpl.java b/sandbox/lresende/backup/company-das/src/main/java/das/DASServiceImpl.java
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@@ -0,0 +1,153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 das;
+
+import java.io.InputStream;
+import java.util.Vector;
+
+import org.apache.tuscany.das.rdb.Command;
+import org.apache.tuscany.das.rdb.DAS;
+import org.osoa.sca.annotations.Destroy;
+import org.osoa.sca.annotations.Scope;
+
+import commonj.sdo.DataObject;
+
+@Scope("COMPOSITE")
+public class DASServiceImpl implements DASService {
+
+    private DAS das = null;
+
+    /**
+     * Initialize DAS
+     * @return
+     * @throws DASServiceException
+     */
+    private void initDAS(InputStream config) throws DASServiceException {
+        if(config == null){
+            throw new DASServiceException("Missing configuration information");
+        }
+
+        if(this.das != null){
+            this.das.releaseResources();
+            this.das = null;
+        }
+
+        this.das = DAS.FACTORY.createDAS(config);
+    }
+    
+    @Destroy
+    protected void destroyDAS() {
+        if(das != null) {
+            das.releaseResources();
+        }
+    }
+
+    /**
+     * Get a DAS instance based on the configuration
+     * @return
+     * @throws DASServiceException
+     */
+    private DAS getDAS() throws DASServiceException {
+        if(this.das == null){
+             throw new DASServiceException("DAS not initialized. Please provide DAS configuration torugh das.SetConfig");
+        }
+
+        return this.das;
+    }
+
+    /**
+     * Set DAS configuration file to be used
+     * @param configStream
+     * @throws DASServiceException
+     */
+    public void configureService(InputStream configStream) throws DASServiceException{
+        this.initDAS(configStream);
+    }
+
+
+
+    /**
+     * Execute an existing command. The commands are defined in the DAS Configuration file being used by the service
+     * @param commandName Command name as it appears on the DAS Configuration file
+     * @param commandArguments Vector with arguments to be used by the command
+     * @throws DASServiceException
+     * @return
+     */
+    public DataObject executeCommand(String commandName, Vector commandArguments) throws DASServiceException{
+        Command command = this.getDAS().getCommand(commandName);
+
+        if(command == null){
+            throw new DASServiceException("Invalid command: " + commandName);
+        }
+
+        //check if arguments was passed
+        if(commandArguments != null && commandArguments.size() > 0){
+            //we need to set the arguments
+            int pos=0;
+            for(Object argument : commandArguments){
+                pos++;
+                command.setParameter(pos, argument);
+            }
+        }
+
+        DataObject root = command.executeQuery();
+
+        return root;
+    }
+
+    /**
+     * Execute a new command, this can be any arbitrary valid query based on the backend implementation (e.g. SQL Query for DAS RDB)
+     * @param newCommand A new command to be executed (e.g SQL Query)
+     * @param commandArguments Vector with arguments to be used by the command
+     * @throws DASServiceException
+     * @return
+     */
+    public DataObject execute(String adHocQuery, Vector commandArguments) throws DASServiceException {
+       Command command = this.getDAS().createCommand(adHocQuery);
+
+        if(command == null){
+            throw new DASServiceException("Invalid command: " + adHocQuery);
+        }
+
+        //check if arguments was passed
+        if(commandArguments != null && commandArguments.size() > 0){
+            //we need to set the arguments
+            int pos=0;
+            for(Object argument : commandArguments){
+                pos++;
+                command.setParameter(pos, argument);
+            }
+        }
+        DataObject root = command.executeQuery();
+
+        return root;
+    }
+
+    /**
+     * Apply all changes on the graph back to the persistent repository.
+     * This would save the changes on the SDO ChangeSummary back to the database
+     * Note: Your SDO ojects should have been created with ChangeSummary support
+     * @throws DASServiceException
+     * @param graphRoot SDO Object with changes to be commited to persistent repository
+     */
+    public void applyChanges(DataObject graphRoot) throws DASServiceException{
+        // TODO Auto-generated method stub
+
+    }
+}