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org.apache.portals.graffito.jcr.reflection.ReflectionUtils	0%	0%

1		/*
2		* Copyright 2000-2004 The Apache Software Foundation.
3		*
4		* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
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.apache.portals.graffito.jcr.reflection;
17
18		import java.lang.reflect.InvocationTargetException;
19
20		import org.apache.commons.beanutils.ConstructorUtils;
21		import org.apache.commons.beanutils.PropertyUtils;
22		import org.apache.portals.graffito.jcr.exception.JcrMappingException;
23		import org.apache.portals.graffito.jcr.persistence.collectionconverter.CollectionConverter;
24
25
26		/**
27		* Utility class for handling reflection using BeanUtils.
28		*
29		* @author <a href='mailto:the_mindstorm[at]evolva[dot]ro'>Alexandru Popescu</a>
30		*/
31	0	abstract public class ReflectionUtils {
32		public static Object getNestedProperty(Object object, String fieldName) {
33	0	if (null == object) {
34	0	return null;
35		}
36
37		try {
38	0	return PropertyUtils.getNestedProperty(object, fieldName);
39		}
40	0	catch(IllegalAccessException e) {
41	0	throw new JcrMappingException("Cannot access property "
42		+ fieldName,
43		e);
44		}
45	0	catch(InvocationTargetException e) {
46	0	throw new JcrMappingException("Cannot access property "
47		+ fieldName,
48		e);
49		}
50	0	catch(NoSuchMethodException e) {
51	0	throw new JcrMappingException("Cannot access property "
52		+ fieldName,
53		e);
54		}
55		}
56
57		public static Class getPropertyType(Object object, String fieldName) {
58		try {
59	0	return PropertyUtils.getPropertyType(object, fieldName);
60		}
61	0	catch(Exception ex) {
62	0	throw new JcrMappingException("Cannot access property "
63		+ fieldName,
64		ex);
65		}
66		}
67
68		public static Object newInstance(Class clazz) {
69		try {
70	0	return clazz.newInstance();
71		}
72	0	catch(Exception ex) {
73	0	throw new JcrMappingException("Cannot create instance for class "
74		+ clazz,
75		ex);
76		}
77		}
78
79		/**
80		* @param className
81		* @param objects
82		* @return
83		*/
84		public static CollectionConverter invokeConstructor(String className,
85		Object[] params) {
86		try {
87	0	Class converterClass= Class.forName(className);
88
89	0	return (CollectionConverter) ConstructorUtils.invokeConstructor(converterClass, params);
90		}
91	0	catch(Exception ex) {
92	0	throw new JcrMappingException("Cannot create instance for class "
93		+ className,
94		ex);
95		}
96		}
97
98		/**
99		* @param object
100		* @param fieldName
101		* @param path
102		*/
103		public static void setNestedProperty(Object object, String fieldName, Object value) {
104		try {
105	0	PropertyUtils.setNestedProperty(object, fieldName, value);
106		}
107	0	catch(Exception ex) {
108	0	throw new JcrMappingException("Cannot set the field " + fieldName,
109		ex);
110	0	}
111	0	}
112
113		/**
114		* @param string
115		* @return
116		*/
117		public static Object newInstance(String clazz) {
118		try {
119	0	return Class.forName(clazz).newInstance();
120		}
121	0	catch(Exception ex) {
122	0	throw new JcrMappingException("Cannot create instance for class "
123		+ clazz,
124		ex);
125		}
126		}
127
128		/**
129		* @param elementClassName
130		* @return
131		*/
132		public static Class forName(String clazz) {
133		try {
134	0	return Class.forName(clazz);
135		}
136	0	catch(Exception ex) {
137	0	throw new JcrMappingException("Cannot load class " + clazz, ex);
138		}
139		}
140		}

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