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16 package org.apache.cocoon.components.xscript;
17
18 import org.apache.avalon.framework.activity.Disposable;
19 import org.apache.avalon.framework.component.Component;
20 import org.apache.avalon.framework.logger.AbstractLogEnabled;
21 import org.apache.avalon.framework.parameters.ParameterException;
22 import org.apache.avalon.framework.parameters.Parameterizable;
23 import org.apache.avalon.framework.parameters.Parameters;
24 import org.apache.avalon.framework.service.ServiceException;
25 import org.apache.avalon.framework.service.ServiceManager;
26 import org.apache.avalon.framework.service.Serviceable;
27 import org.apache.avalon.framework.thread.ThreadSafe;
28 import org.apache.avalon.framework.context.Contextualizable;
29 import org.apache.avalon.framework.context.ContextException;
30
31 import org.apache.cocoon.environment.Request;
32 import org.apache.cocoon.environment.ObjectModelHelper;
33 import org.apache.cocoon.environment.Context;
34 import org.apache.cocoon.environment.Session;
35 import org.apache.cocoon.Constants;
36
37 import java.util.Map  ;
38
39
46 public class XScriptManagerImpl
47 extends AbstractLogEnabled
48 implements XScriptManager, Serviceable, Component, Parameterizable, Contextualizable, ThreadSafe, Disposable
49 {
50 public static final String CONTEXT = "org.apache.cocoon.components.xscript.scope";
51
52
55 protected ServiceManager manager;
56
57
60 protected Context context;
61
62
63 public void contextualize(org.apache.avalon.framework.context.Context context)
64 throws ContextException
65 {
66 this.context = (Context)context.get(Constants.CONTEXT_ENVIRONMENT_CONTEXT);
67 }
68
69 public void service(ServiceManager manager) throws ServiceException
70 {
71 this.manager = manager;
72 }
73
74 public void register(XScriptObject object) {
75 try {
76 object.service(manager);
77 } catch (ServiceException ignored) { }
78 }
79
80 public void parameterize(Parameters params)
81 throws ParameterException
82 {
83 String [] names = params.getNames();
84
85 XScriptVariableScope s = new XScriptVariableScope();
86 context.setAttribute(CONTEXT, s);
87
88 for (int i = 0; i < names.length; i++) {
89 String resourceString = params.getParameter(names[i]);
90 XScriptObject resource = new XScriptObjectFromURL(this, resourceString);
91 s.put(names[i], resource);
92 }
93 }
94
95 public void dispose() {
96 if (context != null) {
97 context.removeAttribute(CONTEXT);
98 }
99 }
100
101 private IllegalArgumentException
102 createAccessException(String msg, String name, int scope)
103 {
104 StringBuffer message = new StringBuffer ("Cannot ").append(msg)
105 .append(" variable named '").append(name)
106 .append("' in ");
107
108 if (scope == XScriptManager.GLOBAL_SCOPE)
109 message.append("global scope");
110 else if (scope == XScriptManager.SESSION_SCOPE)
111 message.append("session scope");
112 else if (scope == XScriptManager.PAGE_SCOPE)
113 message.append("page scope");
114 else if (scope == XScriptManager.REQUEST_SCOPE)
115 message.append("request scope");
116 else if (scope == XScriptManager.ALL_SCOPES)
117 message.append("any scope");
118 else
119 message.append("unknown scope (").append(scope).append(")");
120
121 return new IllegalArgumentException (message.toString());
122 }
123
124 public XScriptObject get(XScriptVariableScope pageScope,
125 Map objectModel,
126 String name,
127 int scope)
128 throws IllegalArgumentException
129 {
130 XScriptObject o;
131 XScriptVariableScope s = null;
132
133 if (scope == XScriptManager.GLOBAL_SCOPE) {
134 s = (XScriptVariableScope) ObjectModelHelper.getContext(objectModel).getAttribute(CONTEXT);
135 } else if (scope == XScriptManager.SESSION_SCOPE) {
136 Request request = ObjectModelHelper.getRequest(objectModel);
137 s = (XScriptVariableScope) request.getSession().getAttribute(CONTEXT);
138 } else if (scope == XScriptManager.REQUEST_SCOPE) {
139 Request request = ObjectModelHelper.getRequest(objectModel);
140 s = (XScriptVariableScope) request.getAttribute(CONTEXT);
141 } else if (scope == XScriptManager.PAGE_SCOPE) {
142 s = pageScope;
143 } else if (scope == XScriptManager.ALL_SCOPES) {
144 Request request = ObjectModelHelper.getRequest(objectModel);
145
146 s = (XScriptVariableScope) request.getAttribute(CONTEXT);
148 if (s != null) {
149 o = s.get(name);
150 if (o != null) {
151 return o;
152 }
153 }
154 s = (XScriptVariableScope) request.getSession().getAttribute(CONTEXT);
156 if (s != null) {
157 o = s.get(name);
158 if (o != null) {
159 return o;
160 }
161 }
162 o = pageScope.get(name);
164 if (o != null) {
165 return o;
166 }
167 s = (XScriptVariableScope) ObjectModelHelper.getContext(objectModel).getAttribute(CONTEXT);
169 if (s != null) {
170 o = s.get(name);
171 if (o != null) {
172 return o;
173 }
174 }
175 s = null;
177 }
178
179 if (s != null) {
180 o = s.get(name);
181 if (o != null) {
182 return o;
183 }
184 }
185
186 throw createAccessException("find", name, scope);
187 }
188
189 public XScriptObject getFirst(XScriptVariableScope pageScope,
190 Map objectModel,
191 String name)
192 throws IllegalArgumentException
193 {
194 return get(pageScope, objectModel, name, ALL_SCOPES);
195 }
196
197 public void put(XScriptVariableScope pageScope,
198 Map objectModel,
199 String name,
200 XScriptObject value,
201 int scope)
202 {
203 XScriptVariableScope s;
204
205 if (scope == XScriptManager.GLOBAL_SCOPE) {
206 Context context = ObjectModelHelper.getContext(objectModel);
207 synchronized (context) {
208 s = (XScriptVariableScope) context.getAttribute(CONTEXT);
209 if (s == null) {
210 context.setAttribute(CONTEXT, s = new XScriptVariableScope());
211 }
212 }
213 } else if (scope == XScriptManager.SESSION_SCOPE) {
214 Session session = ObjectModelHelper.getRequest(objectModel).getSession();
215 synchronized (session) {
216 s = (XScriptVariableScope) session.getAttribute(CONTEXT);
217 if (s == null) {
218 session.setAttribute(CONTEXT, s = new XScriptVariableScope());
219 }
220 }
221 } else if (scope == XScriptManager.REQUEST_SCOPE) {
222 Request request = ObjectModelHelper.getRequest(objectModel);
223 synchronized (request) {
224 s = (XScriptVariableScope) request.getAttribute(CONTEXT);
225 if (s == null) {
226 request.setAttribute(CONTEXT, s = new XScriptVariableScope());
227 }
228 }
229 } else if (scope == XScriptManager.PAGE_SCOPE) {
230 s = pageScope;
231 } else {
232 throw createAccessException("create", name, scope);
233 }
234
235 s.put(name, value);
236 }
237
238 public XScriptObject remove(XScriptVariableScope pageScope,
239 Map objectModel,
240 String name,
241 int scope)
242 throws IllegalArgumentException
243 {
244 XScriptObject o;
245 XScriptVariableScope s = null;
246
247 if (scope == XScriptManager.GLOBAL_SCOPE) {
248 s = (XScriptVariableScope) ObjectModelHelper.getContext(objectModel).getAttribute(CONTEXT);
249 } else if (scope == XScriptManager.SESSION_SCOPE) {
250 Request request = ObjectModelHelper.getRequest(objectModel);
251 s = (XScriptVariableScope) request.getSession().getAttribute(CONTEXT);
252 } else if (scope == XScriptManager.REQUEST_SCOPE) {
253 Request request = ObjectModelHelper.getRequest(objectModel);
254 s = (XScriptVariableScope) request.getAttribute(CONTEXT);
255 } else if (scope == XScriptManager.PAGE_SCOPE) {
256 s = pageScope;
257 } else if (scope == XScriptManager.ALL_SCOPES) {
258 Request request = ObjectModelHelper.getRequest(objectModel);
259
260 s = (XScriptVariableScope) request.getAttribute(CONTEXT);
262 if (s != null) {
263 o = s.remove(name);
264 if (o != null) {
265 return o;
266 }
267 }
268 s = (XScriptVariableScope) request.getSession().getAttribute(CONTEXT);
270 if (s != null) {
271 o = s.remove(name);
272 if (o != null) {
273 return o;
274 }
275 }
276 o = pageScope.remove(name);
278 if (o != null) {
279 return o;
280 }
281 s = (XScriptVariableScope) ObjectModelHelper.getContext(objectModel).getAttribute(CONTEXT);
283 if (s != null) {
284 o = s.remove(name);
285 if (o != null) {
286 return o;
287 }
288 }
289 s = null;
291 }
292
293 if (s != null) {
294 o = s.remove(name);
295 if (o != null) {
296 return o;
297 }
298 }
299
300 throw createAccessException("remove", name, scope);
301 }
302
303 public XScriptObject removeFirst(XScriptVariableScope pageScope, Map objectModel,
304 String name)
305 throws IllegalArgumentException
306 {
307 return remove(pageScope, objectModel, name, ALL_SCOPES);
308 }
309 }
310 |
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