1 /*
2 * Copyright 2007 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.core;
17
18 import org.apache.commons.lang.StringUtils;
19 import org.springframework.util.MethodInvoker;
20 import org.springframework.util.ReflectionUtils;
21
22 import java.lang.reflect.Method;
23
24 /**
25 * Extends <code>MethodInvoker</code> to add properties for specifying
26 * a method for invocation within the UIF
27 *
28 * @author Kuali Rice Team (rice.collab@kuali.org)
29 */
30 public class MethodInvokerConfig extends MethodInvoker {
31
32 private String staticMethod;
33 private Class[] argumentTypes;
34
35 /**
36 * Override to catch a set staticMethod since super does
37 * not contain a getter
38 *
39 * @param staticMethod - static method to invoke
40 */
41 @Override
42 public void setStaticMethod(String staticMethod) {
43 super.setStaticMethod(staticMethod);
44 }
45
46 /**
47 * Declared argument types for the method to be invoked, if not set the types will
48 * be retrieved based on the target class and target name
49 *
50 * @return Class[] method argument types
51 */
52 public Class[] getArgumentTypes() {
53 if (argumentTypes == null) {
54 return getMethodArgumentTypes();
55 }
56
57 return argumentTypes;
58 }
59
60 /**
61 * Setter for the method argument types that should be invoked
62 *
63 * @param argumentTypes
64 */
65 public void setArgumentTypes(Class[] argumentTypes) {
66 this.argumentTypes = argumentTypes;
67 }
68
69 /**
70 * Finds the method on the target class that matches the target name and
71 * returns the declared parameter types
72 *
73 * @return Class[] method parameter types
74 */
75 protected Class[] getMethodArgumentTypes() {
76 if (StringUtils.isNotBlank(staticMethod)) {
77 int lastDotIndex = this.staticMethod.lastIndexOf('.');
78 if (lastDotIndex == -1 || lastDotIndex == this.staticMethod.length()) {
79 throw new IllegalArgumentException("staticMethod must be a fully qualified class plus method name: " +
80 "e.g. 'example.MyExampleClass.myExampleMethod'");
81 }
82 String className = this.staticMethod.substring(0, lastDotIndex);
83 String methodName = this.staticMethod.substring(lastDotIndex + 1);
84 try {
85 setTargetClass(resolveClassName(className));
86 } catch (ClassNotFoundException e) {
87 throw new RuntimeException("Unable to get class for name: " + className);
88 }
89 setTargetMethod(methodName);
90 }
91
92 Method[] candidates = ReflectionUtils.getAllDeclaredMethods(getTargetClass());
93 for (Method candidate : candidates) {
94 if (candidate.getName().equals(getTargetMethod())) {
95 return candidate.getParameterTypes();
96 }
97 }
98
99 return null;
100 }
101 }