AbstractCursorHandler


1   /*
2    * $Id: AbstractCursorHandler.java 5462 2005-08-05 18:35:48Z jonesde $
3    *
4    * Copyright (c) 2001-2005 The Open For Business Project - www.ofbiz.org
5    *
6    * Permission is hereby granted, free of charge, to any person obtaining a
7    * copy of this software and associated documentation files (the "Software"),
8    * to deal in the Software without restriction, including without limitation
9    * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10   * and/or sell copies of the Software, and to permit persons to whom the
11   * Software is furnished to do so, subject to the following conditions:
12   *
13   * The above copyright notice and this permission notice shall be included
14   * in all copies or substantial portions of the Software.
15   *
16   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
21   * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
22   * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23   */
24  package org.ofbiz.entity.jdbc;
25  
26  import java.lang.reflect.Constructor  ;
27  import java.lang.reflect.InvocationHandler  ;
28  import java.lang.reflect.InvocationTargetException  ;
29  import java.lang.reflect.Method  ;
30  import java.lang.reflect.Proxy  ;
31  
32  /**
33   *
34   * @version    $Rev: 5462 $
35   * @since      3.1
36   */
37  public abstract class AbstractCursorHandler implements InvocationHandler   {
38      
39      protected String   cursorName;
40      protected int fetchSize;
41  
42      protected AbstractCursorHandler(String   cursorName, int fetchSize) {
43          this.cursorName = cursorName;
44          this.fetchSize = fetchSize;
45      }
46  
47      public void setCursorName(String   cursorName) {
48          this.cursorName = cursorName;
49      }
50  
51      public String   getCursorName() {
52          return cursorName;
53      }
54  
55      public void setFetchSize(int fetchSize) {
56          this.fetchSize = fetchSize;
57      }
58  
59      public int getFetchSize() {
60          return fetchSize;
61      }
62  
63      protected Object   invoke(Object   obj, Object   proxy, Method   method, Object  [] args) throws Throwable   {
64          if ("toString".equals(method.getName())) {
65              String   str = obj.toString();
66              return getClass().getName() + "{" + str + "}";
67          }
68          return method.invoke(obj, args);
69      }
70  
71      protected static Object   newHandler(InvocationHandler   handler, Class   implClass) throws IllegalAccessException  , IllegalArgumentException  , InstantiationException  , InvocationTargetException  , NoSuchMethodException  , SecurityException   {
72          ClassLoader   loader = implClass.getClassLoader();
73          if (loader == null) loader = ClassLoader.getSystemClassLoader();
74          Class   proxyClass = Proxy.getProxyClass(loader, new Class  []{implClass});
75          Constructor   constructor = proxyClass.getConstructor(new Class  []{InvocationHandler  .class});
76          return constructor.newInstance(new Object  []{handler});
77      }
78  }
79
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