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package org.apache.tapestry.services.impl; |
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|
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import org.apache.commons.logging.Log; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.hivemind.Location; |
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import org.apache.tapestry.*; |
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import org.apache.tapestry.binding.BindingConstants; |
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import org.apache.tapestry.binding.BindingSource; |
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import org.apache.tapestry.binding.LiteralBinding; |
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import org.apache.tapestry.engine.IPageLoader; |
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import org.apache.tapestry.parse.*; |
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import org.apache.tapestry.services.TemplateSource; |
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import org.apache.tapestry.spec.IComponentSpecification; |
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import org.apache.tapestry.spec.IContainedComponent; |
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import org.apache.tapestry.spec.IParameterSpecification; |
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|
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.Map; |
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import java.util.Set; |
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|
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|
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|
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|
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|
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|
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|
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public class ComponentTemplateLoaderLogic |
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{ |
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private Log _log; |
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|
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private IPageLoader _pageLoader; |
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|
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private IRequestCycle _requestCycle; |
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|
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private ITemplateComponent _loadComponent; |
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|
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private BindingSource _bindingSource; |
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|
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private IComponent[] _stack; |
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|
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private int _stackx; |
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|
58 | 0 | private IComponent _activeComponent = null; |
59 | |
|
60 | 0 | private Set _seenIds = new HashSet(); |
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|
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public ComponentTemplateLoaderLogic(Log log, IPageLoader pageLoader, BindingSource bindingSource) |
63 | 0 | { |
64 | 0 | _log = log; |
65 | 0 | _pageLoader = pageLoader; |
66 | 0 | _bindingSource = bindingSource; |
67 | 0 | } |
68 | |
|
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public void loadTemplate(IRequestCycle requestCycle, ITemplateComponent loadComponent, |
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ComponentTemplate template) |
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{ |
72 | 0 | _requestCycle = requestCycle; |
73 | 0 | _loadComponent = loadComponent; |
74 | |
|
75 | 0 | process(template); |
76 | 0 | } |
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|
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private void process(ComponentTemplate template) |
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{ |
80 | 0 | int count = template.getTokenCount(); |
81 | |
|
82 | 0 | _stack = new IComponent[count]; |
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|
84 | 0 | for (int i = 0; i < count; i++) |
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{ |
86 | 0 | TemplateToken token = template.getToken(i); |
87 | |
|
88 | 0 | TokenType type = token.getType(); |
89 | |
|
90 | 0 | if (type == TokenType.TEXT) |
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{ |
92 | 0 | process((TextToken) token); |
93 | 0 | continue; |
94 | |
} |
95 | |
|
96 | 0 | if (type == TokenType.OPEN) |
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{ |
98 | 0 | process((OpenToken) token); |
99 | 0 | continue; |
100 | |
} |
101 | |
|
102 | 0 | if (type == TokenType.CLOSE) |
103 | |
{ |
104 | 0 | process((CloseToken) token); |
105 | 0 | continue; |
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} |
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|
108 | 0 | if (type == TokenType.LOCALIZATION) |
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{ |
110 | 0 | process((LocalizationToken) token); |
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} |
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} |
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|
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|
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|
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|
117 | 0 | if (_stackx != 0) |
118 | 0 | throw new ApplicationRuntimeException(Tapestry.getMessage("BaseComponent.unbalance-open-tags"), |
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_loadComponent, null, null); |
120 | |
|
121 | 0 | checkAllComponentsReferenced(); |
122 | 0 | } |
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|
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|
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|
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|
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|
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|
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|
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|
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|
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private void process(TextToken token) |
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{ |
134 | 0 | if (_activeComponent == null) |
135 | |
{ |
136 | 0 | _loadComponent.addOuter(token); |
137 | 0 | return; |
138 | |
} |
139 | |
|
140 | 0 | if (!_activeComponent.getSpecification().getAllowBody()) |
141 | 0 | throw createBodylessComponentException(_activeComponent); |
142 | |
|
143 | 0 | _activeComponent.addBody(token); |
144 | 0 | } |
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|
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private void process(OpenToken token) |
147 | |
{ |
148 | 0 | String id = token.getId(); |
149 | 0 | IComponent component = null; |
150 | 0 | String componentType = token.getComponentType(); |
151 | |
|
152 | 0 | if (componentType == null) |
153 | 0 | component = getEmbeddedComponent(id); |
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else |
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{ |
156 | 0 | checkForDuplicateId(id, token.getLocation()); |
157 | |
|
158 | 0 | component = createImplicitComponent(id, componentType, token.getLocation()); |
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} |
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|
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|
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|
163 | 0 | if (_seenIds.contains(id)) |
164 | 0 | throw new ApplicationRuntimeException(ImplMessages.multipleComponentReferences(_loadComponent,id), |
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_loadComponent, token.getLocation(), null); |
166 | |
|
167 | 0 | _seenIds.add(id); |
168 | |
|
169 | 0 | if (_activeComponent == null) |
170 | 0 | _loadComponent.addOuter(component); |
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else |
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{ |
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|
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|
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|
176 | 0 | if (!_activeComponent.getSpecification().getAllowBody()) |
177 | 0 | throw createBodylessComponentException(_activeComponent); |
178 | |
|
179 | 0 | _activeComponent.addBody(component); |
180 | |
} |
181 | |
|
182 | 0 | addTemplateBindings(component, token); |
183 | |
|
184 | 0 | _stack[_stackx++] = _activeComponent; |
185 | |
|
186 | 0 | _activeComponent = component; |
187 | 0 | } |
188 | |
|
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private void checkForDuplicateId(String id, Location location) |
190 | |
{ |
191 | 0 | if (id == null) |
192 | 0 | return; |
193 | |
|
194 | 0 | IContainedComponent cc = _loadComponent.getSpecification().getComponent(id); |
195 | |
|
196 | 0 | if (cc != null) |
197 | 0 | throw new ApplicationRuntimeException(ImplMessages.dupeComponentId(id, cc), |
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_loadComponent, location, null); |
199 | 0 | } |
200 | |
|
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private IComponent createImplicitComponent(String id, String componentType, Location location) |
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{ |
203 | 0 | return _pageLoader.createImplicitComponent( |
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_requestCycle, |
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_loadComponent, |
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id, |
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componentType, |
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location); |
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} |
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|
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private IComponent getEmbeddedComponent(String id) |
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{ |
213 | 0 | return _loadComponent.getComponent(id); |
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} |
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|
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private void process(CloseToken token) |
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{ |
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|
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|
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|
221 | 0 | if (_stackx <= 0) |
222 | 0 | throw new ApplicationRuntimeException(ImplMessages.unbalancedCloseTags(), |
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_loadComponent, token.getLocation(), null); |
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|
225 | |
|
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|
227 | 0 | _stack[_stackx--] = null; |
228 | |
|
229 | 0 | _activeComponent = _stack[_stackx]; |
230 | 0 | } |
231 | |
|
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private void process(LocalizationToken token) |
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{ |
234 | 0 | IRender render = new LocalizedStringRender(_loadComponent, token); |
235 | |
|
236 | 0 | if (_activeComponent == null) |
237 | 0 | _loadComponent.addOuter(render); |
238 | |
else |
239 | 0 | _activeComponent.addBody(render); |
240 | 0 | } |
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|
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|
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|
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|
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|
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void addTemplateBindings(IComponent component, OpenToken token) |
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{ |
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|
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|
250 | 0 | component.setTemplateTagName(token.getTag()); |
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|
252 | 0 | IComponentSpecification spec = component.getSpecification(); |
253 | |
|
254 | 0 | Map attributes = token.getAttributesMap(); |
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|
256 | 0 | if (attributes != null) |
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{ |
258 | 0 | Iterator i = attributes.entrySet().iterator(); |
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|
260 | 0 | while (i.hasNext()) |
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{ |
262 | 0 | Map.Entry entry = (Map.Entry) i.next(); |
263 | |
|
264 | 0 | String attributeName = (String) entry.getKey(); |
265 | 0 | String value = (String) entry.getValue(); |
266 | |
|
267 | 0 | IParameterSpecification pspec = spec.getParameter(attributeName); |
268 | 0 | String parameterName = pspec == null ? attributeName : pspec.getParameterName(); |
269 | |
|
270 | 0 | if (!attributeName.equals(parameterName)) |
271 | 0 | _log.warn(ImplMessages.usedTemplateParameterAlias(token, attributeName, parameterName)); |
272 | |
|
273 | 0 | String description = ImplMessages.templateParameterName(parameterName); |
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|
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|
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|
277 | 0 | IBinding binding = _bindingSource.createBinding( |
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_loadComponent, |
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pspec, |
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description, |
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value, |
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BindingConstants.LITERAL_PREFIX, |
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token.getLocation()); |
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|
285 | 0 | addBinding(component, spec, parameterName, binding); |
286 | 0 | } |
287 | |
} |
288 | |
|
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|
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|
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|
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|
293 | 0 | if (spec.getParameter(TemplateSource.TEMPLATE_TAG_PARAMETER_NAME) != null |
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&& component.getBinding(TemplateSource.TEMPLATE_TAG_PARAMETER_NAME) == null) |
295 | |
{ |
296 | 0 | IBinding binding = _bindingSource.createBinding( |
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component, |
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TemplateSource.TEMPLATE_TAG_PARAMETER_NAME, |
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token.getTag(), |
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BindingConstants.LITERAL_PREFIX, |
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token.getLocation()); |
302 | |
|
303 | 0 | addBinding(component, spec, TemplateSource.TEMPLATE_TAG_PARAMETER_NAME, binding); |
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} |
305 | 0 | } |
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|
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|
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|
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|
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|
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|
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|
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private void addBinding(IComponent component, IComponentSpecification spec, |
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String name, IBinding binding) |
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{ |
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|
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|
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|
319 | |
|
320 | 0 | boolean valid = validate(component, spec, name, binding); |
321 | |
|
322 | 0 | if (valid) |
323 | 0 | component.setBinding(name, binding); |
324 | 0 | } |
325 | |
|
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private boolean validate(IComponent component, IComponentSpecification spec, |
327 | |
String name, IBinding binding) |
328 | |
{ |
329 | |
|
330 | |
|
331 | |
|
332 | 0 | boolean isLiteral = binding instanceof LiteralBinding; |
333 | 0 | boolean isBound = component.getBinding(name) != null; |
334 | 0 | boolean isFormal = spec.getParameter(name) != null; |
335 | |
|
336 | 0 | if (!isFormal) |
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{ |
338 | 0 | if (!spec.getAllowInformalParameters()) |
339 | |
{ |
340 | |
|
341 | |
|
342 | |
|
343 | 0 | if (isLiteral) |
344 | 0 | return false; |
345 | |
|
346 | 0 | throw new ApplicationRuntimeException(ImplMessages.templateBindingForInformalParameter(_loadComponent, name, component), |
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component, binding.getLocation(), null); |
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} |
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|
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|
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|
352 | |
|
353 | 0 | if (spec.isReservedParameterName(name)) |
354 | |
{ |
355 | |
|
356 | |
|
357 | |
|
358 | 0 | if (isLiteral) |
359 | 0 | return false; |
360 | |
|
361 | 0 | throw new ApplicationRuntimeException(ImplMessages.templateBindingForReservedParameter(_loadComponent, name, component), |
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component, binding.getLocation(), null); |
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} |
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} |
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|
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|
367 | |
|
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|
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|
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|
371 | |
|
372 | 0 | if (isBound) |
373 | |
{ |
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|
375 | |
|
376 | |
|
377 | 0 | if (isLiteral) |
378 | 0 | return false; |
379 | |
|
380 | 0 | throw new ApplicationRuntimeException(ImplMessages.dupeTemplateBinding( |
381 | |
name, |
382 | |
component, |
383 | |
_loadComponent), component, binding.getLocation(), null); |
384 | |
} |
385 | |
|
386 | 0 | return true; |
387 | |
|
388 | |
} |
389 | |
|
390 | |
private void checkAllComponentsReferenced() |
391 | |
{ |
392 | |
|
393 | |
|
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|
395 | 0 | Map components = _loadComponent.getComponents(); |
396 | |
|
397 | 0 | Set ids = components.keySet(); |
398 | |
|
399 | |
|
400 | |
|
401 | |
|
402 | 0 | if (_seenIds.containsAll(ids)) |
403 | 0 | return; |
404 | |
|
405 | |
|
406 | |
|
407 | |
|
408 | 0 | ids = new HashSet(ids); |
409 | 0 | ids.removeAll(_seenIds); |
410 | |
|
411 | 0 | _log.warn(ImplMessages.missingComponentSpec(_loadComponent, ids)); |
412 | |
|
413 | 0 | } |
414 | |
|
415 | |
private ApplicationRuntimeException createBodylessComponentException(IComponent component) |
416 | |
{ |
417 | 0 | return new ApplicationRuntimeException(ImplMessages.bodylessComponent(), component, null, null); |
418 | |
} |
419 | |
} |