dao/AbstractTabularDaoSupport.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.server.dao;
  17
  18 import java.util.ArrayList;
  19 import java.util.HashMap;
  20 import java.util.List;
  21 import java.util.Map;
  22
  23 import org.apache.commons.logging.Log;
  24 import org.apache.commons.logging.LogFactory;
  25 import org.argeo.ArgeoException;
  26
  27 public abstract class AbstractTabularDaoSupport extends
  28                 AbstractMemoryDaoSupport {
  29         private final static Log log = LogFactory
  30                         .getLog(AbstractTabularDaoSupport.class);
  31
  32         private Map<String, List<Object>> tabularView = new HashMap<String, List<Object>>();
  33
  34         @Override
  35         protected Object findInternalRef(Reference reference) {
  36                 TabularInternalReference tabReference = (TabularInternalReference) reference;
  37                 return getFromTabularView(tabReference.getTargetTableName(),
  38                                 tabReference.getTargetRow());
  39         }
  40
  41         protected Object getFromTabularView(String tableName, Integer row) {
  42                 return tabularView.get(tableName).get(row - 2);
  43         }
  44
  45         protected void registerInTabularView(String tableName, Object object) {
  46                 if (!tabularView.containsKey(tableName))
  47                         tabularView.put(tableName, new ArrayList<Object>());
  48                 tabularView.get(tableName).add(object);
  49         }
  50
  51         protected Class<?> findClassToInstantiate(String tableName) {
  52                 // TODO: ability to map sheet names and class names
  53                 String className = tableName;
  54                 Class<?> clss = null;
  55                 try {
  56                         clss = getClassLoader().loadClass(className);
  57                         return clss;
  58                 } catch (ClassNotFoundException e) {
  59                         // silent
  60                 }
  61
  62                 scannedPkgs: for (String pkg : getScannedPackages()) {
  63                         try {
  64                                 clss = getClassLoader().loadClass(pkg.trim() + "." + className);
  65                                 break scannedPkgs;
  66                         } catch (ClassNotFoundException e) {
  67                                 // silent
  68                                 if (log.isTraceEnabled())
  69                                         log.trace(e.getMessage());
  70                         }
  71                 }
  72
  73                 if (clss == null)
  74                         throw new ArgeoException("Cannot find a class for table "
  75                                         + tableName);
  76
  77                 return clss;
  78         }
  79
  80         protected static class TabularInternalReference extends Reference {
  81                 private String targetTableName;
  82                 private Integer targetRow;
  83
  84                 public TabularInternalReference(Object object, String property,
  85                                 String targetSheet, Integer targetRow) {
  86                         super(object, property, null);
  87                         this.targetTableName = targetSheet;
  88                         this.targetRow = targetRow;
  89                 }
  90
  91                 public String getTargetTableName() {
  92                         return targetTableName;
  93                 }
  94
  95                 public Integer getTargetRow() {
  96                         return targetRow;
  97                 }
  98
  99         }
 100 }