38
39 private Class<?> cl;
40 private Object instance;
41
42 /**
43 * Constructor.
44 * @param o Object to work with.
45 */
46 public ClassReference(Object o) {
47 super();
48 instance = o;
49 cl = o.getClass();
50 }
51
52 /**
53 * Contructor.
54 * The object created by this constructor can be used
55 * to access static methods and fields only.
56 *
57 * @param className name of class
58 * @exception ClassNotFoundException
59 */
60 public ClassReference(String className)
61 throws ClassNotFoundException {
62 super();
63 cl = Class.forName(className);
64 instance = null;
65 }
66
67 /**
68 * Executes class's <code>main(java.lang.String[])</code> method
69 * with a zero-length <code>java.lang.String</code> array
70 * as a parameter.
71 *
72 * @exception NoSuchMethodException
73 * @exception InvocationTargetException
74 */
75 public void startApplication()
76 throws InvocationTargetException, NoSuchMethodException {
77 String[] params = new String[0];
78 startApplication(params);
79 }
80
81 /**
82 * Executes class's <code>main(java.lang.String[])</code> method.
83 *
84 * @param params The <code>java.lang.String</code> array to pass
85 * to <code>main(java.lang.String[])</code>.
86 * @exception NoSuchMethodException
87 * @exception InvocationTargetException
88 */
89 public void startApplication(String[] params)
90 throws InvocationTargetException, NoSuchMethodException {
91 String[] real_params;
92 if (params == null) {
93 real_params = new String[0];
94 } else {
95 real_params = params;
96 }
97 String[][] methodParams = {real_params};
98 Class[] classes = {real_params.getClass()};
99 try {
100 invokeMethod("main", methodParams, classes);
101 } catch (IllegalAccessException e) {
102 e.printStackTrace();
103 } catch (IllegalStateException e) {
104 e.printStackTrace();
105 }
106 }
107
108 /**
109 * Locates method by name and parameter types and executes it.
110 *
111 * @param method_name Name of method.
112 * @param params Method parameters.
113 * @param params_classes Method parameters types.
114 * @return the return value from an invocation of the Method.<BR>
115 * If <code>method_name</code> method is void, <code>null</code> is returned.<BR>
116 * If <code>method_name</code> method returns a primitive type, then
117 * return wrapper class instance.
118 * @throws InvocationTargetException when the invoked method throws an exception.
119 * @throws NoSuchMethodException when the method cannot be found.
120 * @throws IllegalAccessException when access to the class or method is lacking.
121 * @throws SecurityException if access to the package or method is denied.
122 */
123 public Object invokeMethod(String method_name, Object[] params, Class<?>[] params_classes)
124 throws InvocationTargetException, NoSuchMethodException, IllegalAccessException {
125 if (params == null) {
126 params = new Object[0];
127 }
128 if (params_classes == null) {
129 params_classes = new Class<?>[0];
130 }
131 Method method = cl.getMethod(method_name,
132 params_classes);
133 return (method.invoke(instance, params));
134 }
135
|
38
39 private Class<?> cl;
40 private Object instance;
41
42 /**
43 * Constructor.
44 * @param o Object to work with.
45 */
46 public ClassReference(Object o) {
47 super();
48 instance = o;
49 cl = o.getClass();
50 }
51
52 /**
53 * Contructor.
54 * The object created by this constructor can be used
55 * to access static methods and fields only.
56 *
57 * @param className name of class
58 * @throws ClassNotFoundException todo document
59 */
60 public ClassReference(String className)
61 throws ClassNotFoundException {
62 super();
63 cl = Class.forName(className);
64 instance = null;
65 }
66
67 /**
68 * Executes class's <code>main(java.lang.String[])</code> method
69 * with a zero-length <code>java.lang.String</code> array
70 * as a parameter.
71 *
72 * @throws NoSuchMethodException when the method cannot be found.
73 * @throws InvocationTargetException when the invoked method throws an exception.
74 */
75 public void startApplication()
76 throws InvocationTargetException, NoSuchMethodException {
77 String[] params = new String[0];
78 startApplication(params);
79 }
80
81 /**
82 * Executes class's <code>main(java.lang.String[])</code> method.
83 *
84 * @param params The <code>java.lang.String</code> array to pass
85 * to <code>main(java.lang.String[])</code>.
86 * @throws NoSuchMethodException when the method cannot be found.
87 * @throws InvocationTargetException when the invoked method throws an exception.
88 */
89 public void startApplication(String[] params)
90 throws InvocationTargetException, NoSuchMethodException {
91 String[] real_params;
92 if (params == null) {
93 real_params = new String[0];
94 } else {
95 real_params = params;
96 }
97 String[][] methodParams = {real_params};
98 Class[] classes = {real_params.getClass()};
99 try {
100 invokeMethod("main", methodParams, classes);
101 } catch (IllegalAccessException e) {
102 e.printStackTrace();
103 } catch (IllegalStateException e) {
104 e.printStackTrace();
105 }
106 }
107
108 /**
109 * Locates method by name and parameter types and executes it.
110 *
111 * @param method_name Name of method.
112 * @param params Method parameters.
113 * @param params_classes Method parameters types.
114 * @return the return value from an invocation of the Method.<br>
115 * If <code>method_name</code> method is void, <code>null</code> is returned.<br>
116 * If <code>method_name</code> method returns a primitive type, then
117 * return wrapper class instance.
118 * @throws InvocationTargetException when the invoked method throws an exception.
119 * @throws NoSuchMethodException when the method cannot be found.
120 * @throws IllegalAccessException when access to the class or method is lacking.
121 * @throws SecurityException if access to the package or method is denied.
122 */
123 public Object invokeMethod(String method_name, Object[] params, Class<?>[] params_classes)
124 throws InvocationTargetException, NoSuchMethodException, IllegalAccessException {
125 if (params == null) {
126 params = new Object[0];
127 }
128 if (params_classes == null) {
129 params_classes = new Class<?>[0];
130 }
131 Method method = cl.getMethod(method_name,
132 params_classes);
133 return (method.invoke(instance, params));
134 }
135
|