1 /**
2 * Copyright 2005-2014 The Kuali Foundation
3 *
4 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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.kuali.rice.kns.workflow.attribute;
17
18 import net.sf.cglib.proxy.Enhancer;
19 import net.sf.cglib.proxy.InvocationHandler;
20 import org.kuali.rice.core.web.format.BooleanFormatter;
21 import org.kuali.rice.krad.bo.BusinessObject;
22 import org.kuali.rice.krad.util.ObjectUtils;
23
24 import java.lang.reflect.Method;
25 import java.util.HashMap;
26
27 /**
28 * This class provides access to the properties of business objects returned as search results by the WorkflowLookupableImpl.
29 *
30 *
31 * @see org.kuali.rice.kew.attribute.WorkflowLookupableImpl
32 * @deprecated This will go away once workflow supports simple url integration for custom attribute lookups.
33 */
34 @Deprecated
35 public class WorkflowLookupableInvocationHandler implements InvocationHandler {
36 private BusinessObject proxiedBusinessObject;
37 private ClassLoader classLoader;
38
39 private String returnUrl;
40
41 /**
42 * Constructs a WorkflowLookupableInvocationHandler.java.
43 *
44 * @param proxiedBusinessObject The BusinessObject that this instance is providing access to.
45 */
46 public WorkflowLookupableInvocationHandler(BusinessObject proxiedBusinessObject, ClassLoader classLoader) {
47 this.proxiedBusinessObject = proxiedBusinessObject;
48 this.classLoader = classLoader;
49 }
50
51 /**
52 * Constructs a WorkflowLookupableInvocationHandler.java.
53 *
54 * @param proxiedBusinessObject The BusinessObject that this instance is providing access to.
55 * @param returnUrl The returnUrl String for selection of a result from the UI
56 */
57 public WorkflowLookupableInvocationHandler(BusinessObject proxiedBusinessObject, String returnUrl, ClassLoader classLoader) {
58 this.proxiedBusinessObject = proxiedBusinessObject;
59 this.returnUrl = returnUrl;
60 this.classLoader = classLoader;
61 }
62
63 /**
64 * This method intercepts "getReturnUrl" and returns this objects returnUrl attribute. It proxies access to nested
65 * BusinessObjects to ensure that the application plugin classloader is used to resolve OJB proxies. And, it translates booleans
66 * for the UI, using the BooleanFormatter.
67 *
68 * @see net.sf.cglib.proxy.InvocationHandler#invoke(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[]
69 * args)
70 *
71 */
72 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
73 ClassLoader oldClassloader = Thread.currentThread().getContextClassLoader();
74 try {
75 Thread.currentThread().setContextClassLoader(classLoader);
76 if ("getReturnUrl".equals(method.getName())) {
77 return returnUrl;
78 }
79 else if ("getWorkflowLookupableResult".equals(method.getName())) {
80 return Enhancer.create(HashMap.class, new Class[] { WorkflowLookupableResult.class }, this);
81 }
82 else if ("get".equals(method.getName())) {
83 Object propertyValue = ObjectUtils.getNestedValue(proxiedBusinessObject, args[0].toString());
84 if (propertyValue instanceof BusinessObject) {
85 return Enhancer.create(propertyValue.getClass(), new WorkflowLookupableInvocationHandler((BusinessObject) propertyValue, classLoader));
86 }
87 else {
88 if (propertyValue instanceof Boolean) {
89 return new BooleanFormatter().format(propertyValue);
90 }
91 return propertyValue;
92 }
93 }
94 else {
95 return method.invoke(proxiedBusinessObject, args);
96 }
97 }
98 catch (Exception e) {
99 throw (e.getCause() != null ? e.getCause() : e);
100 }
101 finally {
102 Thread.currentThread().setContextClassLoader(oldClassloader);
103 }
104 }
105 }