001 /*
002 * Copyright 2005-2007 The Kuali Foundation
003 *
004 *
005 * Licensed under the Educational Community License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.opensource.org/licenses/ecl2.php
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.kuali.rice.kew.util;
018
019 import java.lang.reflect.Field;
020 import java.lang.reflect.InvocationTargetException;
021 import java.lang.reflect.Method;
022
023 import org.apache.log4j.Logger;
024
025 /**
026 * Dumps the fields of the given class.
027 *
028 * @author Kuali Rice Team (rice.collab@kuali.org)
029 */
030 public class ClassDumper {
031 private static final Logger LOG = Logger.getLogger(ClassDumper.class);
032
033 public static void dumpFieldsToLog(Object o) {
034 if (LOG.isDebugEnabled()) {
035 LOG.debug(dumpFields(o));
036 } else if (LOG.isInfoEnabled()) {
037 if (o == null) {
038 LOG.info("null");
039 } else {
040 LOG.info(o.getClass() + ": " + o.toString());
041 }
042 }
043 }
044
045 public static String dumpFields(Object o) {
046 StringBuffer buf = new StringBuffer();
047
048 if (o == null) {
049 return "NULL";
050 }
051
052 Class clazz = o.getClass();
053 // maybe just iterating over getter methods themselves would be a better strategy?
054 // or maybe just jakarta commons lang ToStringBuilder.reflectionToString(String, MULTI_LINE_STYLE):
055 // http://jakarta.apache.org/commons/lang/api/org/apache/commons/lang/builder/ToStringBuilder.html
056 Field[] fields = clazz.getDeclaredFields();
057
058 for (int i = 0; i < fields.length; ++i) {
059 try {
060 String methodName = "get" + fields[i].getName().substring(0, 1).toUpperCase() + fields[i].getName().substring(1);
061 Method method = clazz.getMethod(methodName, null);
062 Object value = method.invoke(o, null);
063 buf.append(fields[i].getName()).append(" : ");
064
065 if (value == null) {
066 buf.append("null\n");
067 } else {
068 buf.append(value.toString()).append("\n");
069 }
070 } catch (IllegalAccessException e) {
071 buf.append(fields[i].getName()).append(" unavailable by security policy\n");
072 } catch (NoSuchMethodException ex) {
073 buf.append(fields[i].getName()).append(" no getter method for this field\n");
074 } catch (InvocationTargetException ex) {
075 buf.append(fields[i].getName()).append(" unable to invoke the method on target\n");
076 }
077 }
078
079 return buf.toString();
080 }
081 }