1 files changed, 141 insertions, 0 deletions
diff --git a/sandbox/sebastien/java/sca-node/modules/data-engine-helper/src/main/java/org/apache/tuscany/sca/data/engine/DataAccessEngineManager.java b/sandbox/sebastien/java/sca-node/modules/data-engine-helper/src/main/java/org/apache/tuscany/sca/data/engine/DataAccessEngineManager.java
new file mode 100644
index 0000000000..572c190037
--- /dev/null
+++ b/sandbox/sebastien/java/sca-node/modules/data-engine-helper/src/main/java/org/apache/tuscany/sca/data/engine/DataAccessEngineManager.java
@@ -0,0 +1,141 @@
+/*
+ * 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 org.apache.tuscany.sca.data.engine;
+
+import java.io.InputStream;
+import java.util.List;
+
+import org.apache.tuscany.das.rdb.ConfigHelper;
+import org.apache.tuscany.das.rdb.DAS;
+import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper;
+import org.apache.tuscany.sca.data.engine.config.ConnectionInfo;
+
+/**
+ * The DataAccessEngineManager acts like a registry and factory for DAS instances
+ * It holds DAS by it's config file name, reusing the same DAS for all components 
+ * using the same config file.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DataAccessEngineManager {
+    //private final Map<String, DAS> registry = new HashMap<String, DAS>();
+    
+    public DataAccessEngineManager() {
+        super();
+    }
+    
+    protected DAS initializeDAS(String config, ConnectionInfo connectionInfo, String table, String pkColumns) throws MissingConfigFileException {
+        //load the config file
+        //System.out.println("Initializing DAS");
+        
+        ConfigHelper configHelper;
+        
+        if(config == null) {
+            //no config information
+            configHelper = new ConfigHelper();    
+        } else {
+            //initialize the config helper by loading config file
+            configHelper = new ConfigHelper(this.getConfigStream(config));
+        }
+        
+        //add additional connectionInfo if provided in the SCA Composite file
+        if( connectionInfo != null) {
+            String dataSource = connectionInfo.getDataSource();
+            if(dataSource != null && dataSource.length() > 0) {
+                configHelper.addConnectionInfo(dataSource);
+            } else {
+                String driverClass = connectionInfo.getConnectionProperties().getDriverClass();
+                String connectionURL = connectionInfo.getConnectionProperties().getDatabaseURL();
+                String userName = connectionInfo.getConnectionProperties().getUsername();
+                String password = connectionInfo.getConnectionProperties().getPassword();
+                int loginTimeout = connectionInfo.getConnectionProperties().getLoginTimeout();
+
+                configHelper.addConnectionInfo(driverClass, connectionURL, userName, password, loginTimeout);
+            }
+            
+        }
+        
+        if(table != null && pkColumns != null) {
+            MappingWrapper configWrapper = new MappingWrapper(configHelper.getConfig());
+            List<String> pkColsList = DataAccessEngine.getKeys(pkColumns);
+            for(int i=0; i<pkColsList.size(); i++) {
+            	configWrapper.addPrimaryKey(table+"."+pkColsList.get(i), pkColsList.get(i));
+            }                	
+        }
+        
+        DAS das = DAS.FACTORY.createDAS(configHelper.getConfig());
+        
+        return das;    	
+    }
+    
+/*
+    public DAS getDAS(String config) throws MissingConfigFileException {
+        //DAS das = registry.get(config);
+        //if ( das == null) {
+        //    das = this.initializeDAS(config);
+        //    this.registry.put(config, das);
+        //}
+        return initializeDAS(config, null);
+    }
+
+    public DAS getDAS(ConnectionInfo connectionInfo) {
+        assert connectionInfo != null;
+        
+        //FIXME: cache the das, we need to define the keys to use (datasource and databaseurl + hashed(username + password))
+        DAS das = null;
+        try {
+            das =  initializeDAS(null, connectionInfo);
+        }catch (MissingConfigFileException e) {
+            //this should never happen, as configFile == null
+        }
+        
+        return das;
+    }
+*/
+    public DAS getDAS(String config, ConnectionInfo connectionInfo) throws MissingConfigFileException {
+        assert connectionInfo != null;
+        
+        //FIXME: cache the das, we need to define the keys to use (datasource and databaseurl + hashed(username + password))
+        
+        return initializeDAS(config, connectionInfo, null, null);
+    }
+    
+    public DAS getDAS(String config, ConnectionInfo connectionInfo, String table, String pkColumns) throws MissingConfigFileException {
+        assert connectionInfo != null;
+        
+        //FIXME: cache the das, we need to define the keys to use (datasource and databaseurl + hashed(username + password))
+        
+        return initializeDAS(config, connectionInfo, table, pkColumns);
+    }
+    
+    protected InputStream getConfigStream(String config) throws MissingConfigFileException{
+        InputStream configStream = null;
+        
+        try {
+            configStream = this.getClass().getClassLoader().getResourceAsStream(config); 
+        } catch (Exception e) {
+            throw new MissingConfigFileException(config); 
+        }
+        
+        return configStream;
+    }
+    
+
+}