Small refactor for comming converters

vasc-backend/vasc-backend-metamodel/src/main/java/net/forwardfire/vasc/backend/metamodel/MetaModelVascBackend.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2007-2012 forwardfire.net All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are permitted provided
+ * that the following conditions are met:
+ * 
+ * * Redistributions of source code must retain the above copyright notice, this list of conditions and the
+ *   following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
+ *   the following disclaimer in the documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package net.forwardfire.vasc.backend.metamodel;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.eobjects.metamodel.DataContext;
+import org.eobjects.metamodel.data.DataSet;
+import org.eobjects.metamodel.data.Row;
+import org.eobjects.metamodel.query.Query;
+import org.eobjects.metamodel.query.SelectItem;
+import org.eobjects.metamodel.schema.Schema;
+import org.eobjects.metamodel.schema.Table;
+
+import net.forwardfire.vasc.backend.AbstractVascBackend;
+import net.forwardfire.vasc.backend.VascBackendState;
+import net.forwardfire.vasc.backend.data.MapVascEntryFieldValue;
+import net.forwardfire.vasc.backend.data.MapVascEntryRecordCreator;
+import net.forwardfire.vasc.core.VascEntry;
+import net.forwardfire.vasc.core.VascEntryField;
+import net.forwardfire.vasc.core.VascException;
+import net.forwardfire.vasc.core.entry.VascEntryFieldValue;
+import net.forwardfire.vasc.core.entry.VascEntryRecordCreator;
+
+/**
+ * Provides backend for metamodel.
+ * 
+ * @author Willem Cazander
+ * @version 1.0 Dec 31, 2011
+ */
+public class MetaModelVascBackend extends AbstractVascBackend {
+
+	private DataContext dataContext = null;
+	private String table = null;
+	
+	public List<Object> execute(VascBackendState state) throws VascException {
+		Schema schema = dataContext.getDefaultSchema();
+		Table t = schema.getTableByName(table);
+		//dataContext.query().from("").select("").where("").
+		Query q = dataContext.query().from(t).select(t.getColumns()).toQuery();
+		DataSet ds = dataContext.executeQuery(q);
+		List<Object> result = new ArrayList<Object>(50); 
+		while (ds.next()) {
+			  Row row = ds.getRow();
+			  SelectItem[] cols = row.getSelectItems();
+			  Map<String,Object> map = new HashMap<String,Object>(cols.length);
+			  for (SelectItem col:cols) {
+				  Object value = row.getValue(col);
+				  map.put(col.getColumn().getName(), value);
+			  }
+			  result.add(map);
+		}
+
+		return result;
+	}
+
+	public void persist(Object object) throws VascException {
+	}
+
+	public Object merge(Object object) throws VascException {
+		return object;
+	}
+
+	public void delete(Object object) throws VascException {
+	}
+
+	public VascEntryFieldValue provideVascEntryFieldValue(VascEntryField field) {
+		return new MapVascEntryFieldValue();
+	}
+
+	public VascEntryRecordCreator provideVascEntryRecordCreator(VascEntry vascEntry) {
+		return new MapVascEntryRecordCreator();
+	}
+}