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Java > Open Source Codes > com > ibatis > sqlmap > engine > exchange > DataExchangeFactory


1 /*
2  * Copyright 2004 Clinton Begin
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 com.ibatis.sqlmap.engine.exchange;
17
18 import com.ibatis.sqlmap.engine.type.DomTypeMarker;
19 import com.ibatis.sqlmap.engine.type.TypeHandlerFactory;
20
21 import java.util.List JavaDoc;
22 import java.util.Map JavaDoc;
23
24 /**
25  * Factory for DataExchange objects
26  */
27 public class DataExchangeFactory {
28
29   private final DataExchange domDataExchange;
30   private final DataExchange listDataExchange;
31   private final DataExchange mapDataExchange;
32   private final DataExchange primitiveDataExchange;
33   private final DataExchange complexDataExchange;
34
35   private TypeHandlerFactory typeHandlerFactory;
36
37   /**
38    * Constructor for the factory
39    * @param typeHandlerFactory - a type handler factory for the factory
40    */
41   public DataExchangeFactory(TypeHandlerFactory typeHandlerFactory) {
42     this.typeHandlerFactory = typeHandlerFactory;
43     domDataExchange = new DomDataExchange(this);
44     listDataExchange = new ListDataExchange(this);
45     mapDataExchange = new ComplexDataExchange(this);
46     primitiveDataExchange = new PrimitiveDataExchange(this);
47     complexDataExchange = new ComplexDataExchange(this);
48   }
49
50   /**
51    * Getter for the type handler factory
52    * @return - the type handler factory
53    */
54   public TypeHandlerFactory getTypeHandlerFactory() {
55     return typeHandlerFactory;
56   }
57
58   /**
59    * Get a DataExchange object for the passed in Class
60    * @param clazz - the class to get a DataExchange object for
61    * @return - the DataExchange object
62    */
63   public DataExchange getDataExchangeForClass(Class JavaDoc clazz) {
64     DataExchange dataExchange = null;
65     if (clazz == null) {
66       dataExchange = complexDataExchange;
67     } else if (DomTypeMarker.class.isAssignableFrom(clazz)) {
68       dataExchange = domDataExchange;
69     } else if (List JavaDoc.class.isAssignableFrom(clazz)) {
70       dataExchange = listDataExchange;
71     } else if (Map JavaDoc.class.isAssignableFrom(clazz)) {
72       dataExchange = mapDataExchange;
73     } else if (typeHandlerFactory.getTypeHandler(clazz) != null) {
74       dataExchange = primitiveDataExchange;
75     } else {
76       dataExchange = new JavaBeanDataExchange(this);
77     }
78     return dataExchange;
79   }
80
81 }
82
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