1 files changed, 124 insertions, 0 deletions
diff --git a/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ReadCommandImpl.java b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ReadCommandImpl.java
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+++ b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ReadCommandImpl.java
@@ -0,0 +1,124 @@
+/*
+ * 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.das.rdb.impl;
+
+import java.sql.SQLException;
+import java.util.List;
+
+import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper;
+import org.apache.tuscany.das.rdb.graphbuilder.impl.GraphBuilderMetadata;
+import org.apache.tuscany.das.rdb.graphbuilder.impl.ResultSetProcessor;
+import org.apache.tuscany.sdo.util.SDOUtil;
+
+import commonj.sdo.ChangeSummary;
+import commonj.sdo.DataGraph;
+import commonj.sdo.DataObject;
+
+public class ReadCommandImpl extends CommandImpl {
+
+    private int startRow = 1;
+
+    private int endRow = Integer.MAX_VALUE;   
+
+    public ReadCommandImpl(String sqlString, MappingWrapper mapping, List resultDescriptor) {
+        super(sqlString);
+        this.configWrapper = mapping;
+        
+        if (resultDescriptor != null && !resultDescriptor.isEmpty()) {
+            this.resultSetShape = new ResultSetShape(resultDescriptor);
+        }
+    }
+
+   
+    public void execute() {
+        throw new UnsupportedOperationException();
+    }
+
+    public DataObject executeQuery() {
+
+        if (statement.getConnection() == null) {
+            throw new RuntimeException("A DASConnection object must be specified before executing the query.");
+        }
+
+        boolean success = false;
+        try {
+            List results = statement.executeQuery(parameters);
+            success = true;
+            return buildGraph(results);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            if (success) {
+                statement.getConnection().cleanUp();
+            } else {
+                statement.getConnection().errorCleanUp();
+            }
+        }
+    }
+
+    protected DataObject buildGraph(List results) throws SQLException {      
+
+        // Before we use the mappingModel, do some checking/updating. If
+        // inferrable information
+        // isn't specified, add it in.
+
+        GraphBuilderMetadata gbmd = new GraphBuilderMetadata(results, configWrapper.getConfig(),
+                resultSetShape);
+
+        // Create the DataGraph
+        DataGraph g = SDOUtil.createDataGraph();
+
+        // Create the root object       
+        g.createRootObject(gbmd.getRootType());
+
+        SDOUtil.registerDataGraphTypes(g, gbmd.getDefinedTypes());
+        
+        ChangeSummary summary = g.getChangeSummary();
+
+        ResultSetProcessor rsp = new ResultSetProcessor(g.getRootObject(), gbmd);
+        rsp.processResults(getStartRow(), getEndRow());
+
+        summary.beginLogging();
+
+        return g.getRootObject();
+    }
+
+
+    protected int getStartRow() {
+        return startRow;
+    }
+
+    protected int getEndRow() {
+        return endRow;
+    }
+
+    protected void setStartRow(int startRow) {
+        this.startRow = startRow;
+    }
+
+    protected void setEndRow(int endRow) {
+        this.endRow = endRow;
+    }
+
+
+    protected void enablePaging() {
+        statement.enablePaging();
+    }
+
+}