New project conventions

[lgpl/argeo-commons.git] / org.argeo.server.core / src / org / argeo / server / dao / AbstractTabularDaoSupport.java

diff --git a/org.argeo.server.core/src/org/argeo/server/dao/AbstractTabularDaoSupport.java b/org.argeo.server.core/src/org/argeo/server/dao/AbstractTabularDaoSupport.java
new file mode 100644 (file)
index 0000000..1ca5a10
--- /dev/null
+++ b/org.argeo.server.core/src/org/argeo/server/dao/AbstractTabularDaoSupport.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * 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 org.argeo.server.dao;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.ArgeoException;
+
+public abstract class AbstractTabularDaoSupport extends
+               AbstractMemoryDaoSupport {
+       private final static Log log = LogFactory
+                       .getLog(AbstractTabularDaoSupport.class);
+       
+       private Map<String, List<Object>> tabularView = new HashMap<String, List<Object>>();
+
+       @Override
+       protected Object findInternalRef(Reference reference) {
+               TabularInternalReference tabReference = (TabularInternalReference) reference;
+               return getFromTabularView(tabReference.getTargetTableName(),
+                               tabReference.getTargetRow());
+       }
+
+       protected Object getFromTabularView(String tableName, Integer row) {
+               return tabularView.get(tableName).get(row - 2);
+       }
+
+       protected void registerInTabularView(String tableName, Object object) {
+               if (!tabularView.containsKey(tableName))
+                       tabularView.put(tableName, new ArrayList<Object>());
+               tabularView.get(tableName).add(object);
+       }
+
+       protected Class<?> findClassToInstantiate(String tableName) {
+               // TODO: ability to map sheet names and class names
+               String className = tableName;
+               Class<?> clss = null;
+               try {
+                       clss = getClassLoader().loadClass(className);
+                       return clss;
+               } catch (ClassNotFoundException e) {
+                       // silent
+               }
+
+               scannedPkgs: for (String pkg : getScannedPackages()) {
+                       try {
+                               clss = getClassLoader().loadClass(pkg.trim() + "." + className);
+                               break scannedPkgs;
+                       } catch (ClassNotFoundException e) {
+                               // silent
+                               if (log.isTraceEnabled())
+                                       log.trace(e.getMessage());
+                       }
+               }
+
+               if (clss == null)
+                       throw new ArgeoException("Cannot find a class for table "
+                                       + tableName);
+
+               return clss;
+       }
+
+       protected static class TabularInternalReference extends Reference {
+               private String targetTableName;
+               private Integer targetRow;
+
+               public TabularInternalReference(Object object, String property,
+                               String targetSheet, Integer targetRow) {
+                       super(object, property, null);
+                       this.targetTableName = targetSheet;
+                       this.targetRow = targetRow;
+               }
+
+               public String getTargetTableName() {
+                       return targetTableName;
+               }
+
+               public Integer getTargetRow() {
+                       return targetRow;
+               }
+
+       }
+}