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37 package net.sourceforge.cruisecontrol;
38
39 import org.apache.log4j.Logger;
40 import org.jdom.Attribute;
41 import org.jdom.Element;
42
43 import java.lang.reflect.Method  ;
44 import java.util.HashMap ;
45 import java.util.HashSet ;
46 import java.util.Iterator ;
47 import java.util.Map ;
48 import java.util.Set ;
49
50
57 public class PluginXMLHelper {
58 private static final Logger LOG = Logger.getLogger(PluginXMLHelper.class);
59 private ProjectHelper projectHelper;
60
61 public PluginXMLHelper(ProjectHelper plugins) {
62 projectHelper = plugins;
63 }
64
65
83 public Object configure(Element objectElement, Class pluginClass,
84 boolean skipChildElements)
85 throws CruiseControlException {
86
87 Object pluginInstance = instantiatePlugin(pluginClass);
88 return configure(objectElement, pluginInstance, skipChildElements);
89
90 }
91
92
98 private Object instantiatePlugin(Class pluginClass) throws CruiseControlException {
99 Object pluginInstance;
100 try {
101 pluginInstance = pluginClass.getConstructor(null).newInstance(null);
102 } catch (Exception e) {
103 LOG.fatal("Could not instantiate class", e);
104 throw new CruiseControlException("Could not instantiate class: "
105 + pluginClass.getName());
106 }
107 return pluginInstance;
108 }
109
110
115 public Object configure(Element objectElement, Object pluginInstance,
116 boolean skipChildElements) throws CruiseControlException {
117
118 LOG.debug("configure " + objectElement.getName() + " instance " + pluginInstance.getClass()
119 + " self configuring: " + (pluginInstance instanceof SelfConfiguringPlugin)
120 + " skip:" + skipChildElements);
121 if (pluginInstance instanceof SelfConfiguringPlugin) {
122 ((SelfConfiguringPlugin) pluginInstance).configure(objectElement);
123 } else {
124 configureObject(objectElement, pluginInstance, skipChildElements);
125 }
126 return pluginInstance;
127 }
128
129
145 protected void configureObject(Element objectElement, Object object, boolean skipChildElements)
146 throws CruiseControlException {
147
148 LOG.debug("configuring object " + objectElement.getName()
149 + " object " + object.getClass() + " skip " + skipChildElements);
150
151 Map setters = new HashMap ();
152 Map creators = new HashMap ();
153 Set adders = new HashSet ();
154
155 Method [] methods = object.getClass().getMethods();
156 for (int i = 0; i < methods.length; i++) {
157 final Method method = methods[i];
158 final String name = method.getName();
159 if (name.startsWith("set")) {
160 setters.put(name.substring("set".length()).toLowerCase(), method);
161 } else if (name.startsWith("create")) {
162 creators.put(name.substring("create".length()).toLowerCase(), method);
163 } else if (name.equals("add") && method.getParameterTypes().length == 1) {
164 adders.add(method);
165 }
166 }
167
168 setFromAttributes(objectElement, setters, object);
169
170 if (!skipChildElements) {
171 Iterator childElementIterator = objectElement.getChildren().iterator();
172 while (childElementIterator.hasNext()) {
173 Element childElement = (Element) childElementIterator.next();
174 if (creators.containsKey(childElement.getName().toLowerCase())) {
175 LOG.debug("treating child with creator " + childElement.getName());
176 try {
177 Method method = (Method ) creators.get(childElement.getName().toLowerCase());
178 Object childObject = method.invoke(object, null);
179 configureObject(childElement, childObject, false);
180 } catch (Exception e) {
181 throw new CruiseControlException(e.getMessage());
182 }
183 } else {
184 Object childObject = projectHelper.configurePlugin(childElement, false);
186
187 Method adder = null;
188 for (Iterator iterator = adders.iterator(); iterator.hasNext();) {
190 Method method = (Method ) iterator.next();
191 Class type = method.getParameterTypes()[0];
192 if (type.isAssignableFrom(childObject.getClass())) {
193 adder = method;
194 break;
195 }
196 }
197
198 if (adder != null) {
199 try {
200 LOG.debug("treating child with adder " + childElement.getName() + " adding " + childObject);
201 adder.invoke(object, new Object []{childObject});
202 } catch (Exception e) {
203 LOG.fatal("Error configuring plugin.", e);
204 }
205 } else {
206 throw new CruiseControlException("Nested element: '" + childElement.getName()
207 + "' is not supported for the <" + objectElement.getName() + "> tag.");
208 }
209 }
210 }
211 }
212 }
213
214 private void setFromAttributes(Element objectElement, Map setters, Object object) throws CruiseControlException {
215 for (Iterator iter = objectElement.getAttributes().iterator(); iter.hasNext(); ) {
216 Attribute attribute = (Attribute) iter.next();
217 callSetter(attribute.getName(), attribute.getValue(), setters, object);
218 }
219 }
220
221 private void callSetter(String propName, String propValue, Map setters, Object object)
222 throws CruiseControlException {
223
224 if (setters.containsKey(propName.toLowerCase())) {
225 LOG.debug("Setting " + propName.toLowerCase() + " to " + propValue);
226 try {
227 Method method = (Method ) setters.get(propName.toLowerCase());
228 Class [] parameters = method.getParameterTypes();
229 if (String .class.isAssignableFrom(parameters[0])) {
230 method.invoke(object, new Object []{propValue});
231 } else if (int.class.isAssignableFrom(parameters[0])) {
232 method.invoke(object, new Object []{Integer.valueOf(propValue)});
233 } else if (long.class.isAssignableFrom(parameters[0])) {
234 method.invoke(object, new Object []{Long.valueOf(propValue)});
235 } else if (boolean.class.isAssignableFrom(parameters[0])) {
236 method.invoke(object,
237 new Object []{Boolean.valueOf(propValue)});
238 } else {
239 LOG.error("rCouldn't invoke setter " + propName.toLowerCase());
240 }
241 } catch (Exception e) {
242 LOG.fatal("Error configuring plugin.", e);
243 }
244 } else {
245 throw new CruiseControlException("Attribute: '" + propName
246 + "' is not supported for class: '" + object.getClass().getName() + "'.");
247 }
248 }
249
250 }
251 |
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