1 /**
2 * Copyright 2005-2011 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.krad.uif.component;
17
18 import org.apache.commons.lang.StringUtils;
19 import org.springframework.util.MethodInvoker;
20 import org.springframework.util.ReflectionUtils;
21
22 import java.io.Serializable;
23 import java.lang.reflect.Method;
24
25 /**
26 * Extends <code>MethodInvoker</code> to add properties for specifying
27 * a method for invocation within the UIF
28 *
29 * @author Kuali Rice Team (rice.collab@kuali.org)
30 */
31 public class MethodInvokerConfig extends MethodInvoker implements Serializable {
32
33 private String staticMethod;
34 private Class[] argumentTypes;
35
36 /**
37 * Override to catch a set staticMethod since super does
38 * not contain a getter
39 *
40 * @param staticMethod - static method to invoke
41 */
42 @Override
43 public void setStaticMethod(String staticMethod) {
44 super.setStaticMethod(staticMethod);
45 }
46
47 /**
48 * Declared argument types for the method to be invoked, if not set the types will
49 * be retrieved based on the target class and target name
50 *
51 * @return Class[] method argument types
52 */
53 public Class[] getArgumentTypes() {
54 if (argumentTypes == null) {
55 return getMethodArgumentTypes();
56 }
57
58 return argumentTypes;
59 }
60
61 /**
62 * Setter for the method argument types that should be invoked
63 *
64 * @param argumentTypes
65 */
66 public void setArgumentTypes(Class[] argumentTypes) {
67 this.argumentTypes = argumentTypes;
68 }
69
70 /**
71 * Finds the method on the target class that matches the target name and
72 * returns the declared parameter types
73 *
74 * @return Class[] method parameter types
75 */
76 protected Class[] getMethodArgumentTypes() {
77 if (StringUtils.isNotBlank(staticMethod)) {
78 int lastDotIndex = this.staticMethod.lastIndexOf('.');
79 if (lastDotIndex == -1 || lastDotIndex == this.staticMethod.length()) {
80 throw new IllegalArgumentException("staticMethod must be a fully qualified class plus method name: " +
81 "e.g. 'example.MyExampleClass.myExampleMethod'");
82 }
83 String className = this.staticMethod.substring(0, lastDotIndex);
84 String methodName = this.staticMethod.substring(lastDotIndex + 1);
85 try {
86 setTargetClass(resolveClassName(className));
87 } catch (ClassNotFoundException e) {
88 throw new RuntimeException("Unable to get class for name: " + className);
89 }
90 setTargetMethod(methodName);
91 }
92
93 Method[] candidates = ReflectionUtils.getAllDeclaredMethods(getTargetClass());
94 for (Method candidate : candidates) {
95 if (candidate.getName().equals(getTargetMethod())) {
96 return candidate.getParameterTypes();
97 }
98 }
99
100 return null;
101 }
102 }