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package org.apache.tapestry.services.impl; |
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import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap; |
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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.Resource; |
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import org.apache.tapestry.*; |
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import org.apache.tapestry.engine.ITemplateSourceDelegate; |
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import org.apache.tapestry.event.ReportStatusEvent; |
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import org.apache.tapestry.event.ReportStatusListener; |
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import org.apache.tapestry.event.ResetEventListener; |
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import org.apache.tapestry.l10n.ResourceLocalizer; |
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import org.apache.tapestry.parse.*; |
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import org.apache.tapestry.resolver.ComponentSpecificationResolver; |
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import org.apache.tapestry.resolver.IComponentResourceResolver; |
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import org.apache.tapestry.services.ComponentPropertySource; |
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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.util.MultiKey; |
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import java.io.BufferedInputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.InputStreamReader; |
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import java.net.URL; |
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import java.util.Iterator; |
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import java.util.Locale; |
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import java.util.Map; |
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public class TemplateSourceImpl implements TemplateSource, ResetEventListener, ReportStatusListener |
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{ |
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public static final String TEMPLATE_ENCODING_PROPERTY_NAME = "org.apache.tapestry.template-encoding"; |
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private static final int BUFFER_SIZE = 2000; |
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private String _serviceId; |
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private Log _log; |
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private Map _cache = new ConcurrentHashMap(); |
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private Map _templates = new ConcurrentHashMap(); |
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private ITemplateParser _parser; |
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private Resource _contextRoot; |
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private ITemplateSourceDelegate _delegate; |
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private ComponentSpecificationResolver _componentSpecificationResolver; |
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private ComponentPropertySource _componentPropertySource; |
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private ResourceLocalizer _localizer; |
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private IComponentResourceResolver _resourceResolver; |
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public void resetEventDidOccur() |
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{ |
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_cache.clear(); |
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_templates.clear(); |
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} |
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public void reportStatus(ReportStatusEvent event) |
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{ |
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event.title(_serviceId); |
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int templateCount = 0; |
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int tokenCount = 0; |
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int characterCount = 0; |
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Iterator i = _templates.values().iterator(); |
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while (i.hasNext()) |
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{ |
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ComponentTemplate template = (ComponentTemplate) i.next(); |
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templateCount++; |
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int count = template.getTokenCount(); |
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tokenCount += count; |
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for (int j = 0; j < count; j++) |
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{ |
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TemplateToken token = template.getToken(j); |
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if (token.getType() == TokenType.TEXT) |
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{ |
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TextToken tt = (TextToken) token; |
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characterCount += tt.getLength(); |
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} |
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} |
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} |
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event.property("parsed templates", templateCount); |
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event.property("total template tokens", tokenCount); |
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event.property("total template characters", characterCount); |
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event.section("Parsed template token counts"); |
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i = _templates.entrySet().iterator(); |
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while (i.hasNext()) |
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{ |
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Map.Entry entry = (Map.Entry) i.next(); |
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String key = entry.getKey().toString(); |
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ComponentTemplate template = (ComponentTemplate) entry.getValue(); |
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event.property(key, template.getTokenCount()); |
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} |
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} |
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public ComponentTemplate getTemplate(IRequestCycle cycle, IComponent component) |
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{ |
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IComponentSpecification specification = component.getSpecification(); |
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Resource resource = specification.getSpecificationLocation(); |
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Locale locale = component.getPage().getLocale(); |
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Object key = new MultiKey(new Object[] { resource, locale }, false); |
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ComponentTemplate result = searchCache(key); |
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if (result != null) |
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return result; |
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result = findTemplate(cycle, resource, component, locale); |
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if (result == null) |
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{ |
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result = _delegate.findTemplate(cycle, component, locale); |
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if (result != null) |
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return result; |
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String message = component.getSpecification().isPageSpecification() ? ImplMessages |
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.noTemplateForPage(component.getExtendedId(), locale) : ImplMessages |
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.noTemplateForComponent(component.getExtendedId(), locale); |
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throw new ApplicationRuntimeException(message, component, component.getLocation(), null); |
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} |
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saveToCache(key, result); |
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return result; |
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} |
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private ComponentTemplate searchCache(Object key) |
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{ |
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return (ComponentTemplate) _cache.get(key); |
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} |
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private void saveToCache(Object key, ComponentTemplate template) |
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{ |
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_cache.put(key, template); |
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} |
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private ComponentTemplate findTemplate(IRequestCycle cycle, Resource resource, |
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IComponent component, Locale locale) |
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{ |
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IAsset templateAsset = component.getAsset(TEMPLATE_ASSET_NAME); |
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if (templateAsset != null && templateAsset.getResourceLocation() != null && templateAsset.getResourceLocation().getResourceURL() != null) |
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return readTemplateFromAsset(cycle, component, templateAsset.getResourceLocation()); |
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String name = resource.getName(); |
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int dotx = name.lastIndexOf('.'); |
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String templateExtension = getTemplateExtension(component); |
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String templateBaseName = name.substring(0, dotx + 1) + templateExtension; |
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ComponentTemplate result = findStandardTemplate( |
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cycle, |
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resource, |
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component, |
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templateBaseName, |
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locale); |
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if (result == null && component.getSpecification().isPageSpecification() |
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&& component.getNamespace().isApplicationNamespace()) |
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result = findPageTemplateInApplicationRoot( |
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cycle, |
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(IPage) component, |
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templateExtension, |
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locale); |
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if (result == null) { |
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Resource template = _resourceResolver.findComponentResource(component, cycle, null, "." + templateExtension, locale); |
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if (template != null && template.getResourceURL() != null) |
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return readTemplateFromAsset(cycle, component, template); |
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} |
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return result; |
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} |
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private ComponentTemplate findPageTemplateInApplicationRoot(IRequestCycle cycle, IPage page, |
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String templateExtension, Locale locale) |
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{ |
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String templateBaseName = page.getPageName() + "." + templateExtension; |
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if (_log.isDebugEnabled()) |
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_log.debug("Checking for " + templateBaseName + " in application root"); |
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Resource baseLocation = _contextRoot.getRelativeResource(templateBaseName); |
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Resource localizedLocation = _localizer.findLocalization(baseLocation, locale); |
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if (localizedLocation == null) |
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return null; |
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return getOrParseTemplate(cycle, localizedLocation, page); |
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} |
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private ComponentTemplate readTemplateFromAsset(IRequestCycle cycle, IComponent component, |
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Resource asset) |
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{ |
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InputStream stream = null; |
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char[] templateData = null; |
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try |
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{ |
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stream = asset.getResourceURL().openStream(); |
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String encoding = getTemplateEncoding(component, null); |
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templateData = readTemplateStream(stream, encoding); |
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stream.close(); |
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} |
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catch (IOException ex) |
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{ |
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throw new ApplicationRuntimeException(ImplMessages.unableToReadTemplate(asset), ex); |
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} |
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return constructTemplateInstance(cycle, templateData, asset, component); |
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} |
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private ComponentTemplate findStandardTemplate(IRequestCycle cycle, Resource resource, |
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IComponent component, String templateBaseName, Locale locale) |
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{ |
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if (_log.isDebugEnabled()) |
332 |
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_log.debug("Searching for localized version of template for " + resource |
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+ " in locale " + locale.getDisplayName()); |
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Resource baseTemplateLocation = resource.getRelativeResource(templateBaseName); |
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Resource localizedTemplateLocation = _localizer.findLocalization(baseTemplateLocation, locale); |
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338 |
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if (localizedTemplateLocation == null) |
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return null; |
340 |
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return getOrParseTemplate(cycle, localizedTemplateLocation, component); |
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} |
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private ComponentTemplate getOrParseTemplate(IRequestCycle cycle, Resource resource, |
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IComponent component) |
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{ |
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ComponentTemplate result = (ComponentTemplate) _templates.get(resource); |
356 |
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if (result != null) |
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return result; |
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361 |
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result = parseTemplate(cycle, resource, component); |
362 |
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363 |
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if (result != null) |
364 |
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_templates.put(resource, result); |
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366 |
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return result; |
367 |
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} |
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369 |
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370 |
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371 |
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372 |
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373 |
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374 |
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private ComponentTemplate parseTemplate(IRequestCycle cycle, Resource resource, |
376 |
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IComponent component) |
377 |
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{ |
378 |
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String encoding = getTemplateEncoding(component, resource.getLocale()); |
379 |
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|
380 |
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char[] templateData = readTemplate(resource, encoding); |
381 |
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if (templateData == null) |
382 |
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return null; |
383 |
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|
384 |
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return constructTemplateInstance(cycle, templateData, resource, component); |
385 |
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} |
386 |
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388 |
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389 |
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390 |
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391 |
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392 |
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393 |
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private synchronized ComponentTemplate constructTemplateInstance(IRequestCycle cycle, |
394 |
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char[] templateData, Resource resource, IComponent component) |
395 |
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{ |
396 |
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String componentAttributeName = _componentPropertySource.getComponentProperty( |
397 |
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component, |
398 |
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"org.apache.tapestry.jwcid-attribute-name"); |
399 |
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|
400 |
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ITemplateParserDelegate delegate = new DefaultParserDelegate(component, |
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componentAttributeName, cycle, _componentSpecificationResolver); |
402 |
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|
403 |
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TemplateToken[] tokens; |
404 |
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405 |
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try |
406 |
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{ |
407 |
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tokens = _parser.parse(templateData, delegate, resource); |
408 |
|
} |
409 |
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catch (TemplateParseException ex) |
410 |
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{ |
411 |
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throw new ApplicationRuntimeException(ImplMessages.unableToParseTemplate(resource), ex); |
412 |
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} |
413 |
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414 |
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if (_log.isDebugEnabled()) |
415 |
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_log.debug("Parsed " + tokens.length + " tokens from template"); |
416 |
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417 |
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return new ComponentTemplate(templateData, tokens); |
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} |
419 |
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420 |
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421 |
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private char[] readTemplate(Resource resource, String encoding) |
426 |
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{ |
427 |
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if (_log.isDebugEnabled()) |
428 |
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_log.debug("Reading template " + resource); |
429 |
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|
430 |
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URL url = resource.getResourceURL(); |
431 |
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|
432 |
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if (url == null) |
433 |
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{ |
434 |
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if (_log.isDebugEnabled()) |
435 |
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_log.debug("Template does not exist."); |
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|
437 |
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return null; |
438 |
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} |
439 |
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|
440 |
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if (_log.isDebugEnabled()) |
441 |
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_log.debug("Reading template from URL " + url); |
442 |
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|
443 |
0 |
InputStream stream = null; |
444 |
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445 |
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try |
446 |
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{ |
447 |
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stream = url.openStream(); |
448 |
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|
449 |
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return readTemplateStream(stream, encoding); |
450 |
|
} |
451 |
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catch (IOException ex) |
452 |
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{ |
453 |
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throw new ApplicationRuntimeException(ImplMessages.unableToReadTemplate(resource), ex); |
454 |
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} |
455 |
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finally |
456 |
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{ |
457 |
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Tapestry.close(stream); |
458 |
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} |
459 |
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460 |
|
} |
461 |
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462 |
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463 |
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464 |
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465 |
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466 |
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private char[] readTemplateStream(InputStream stream, String encoding) throws IOException |
467 |
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{ |
468 |
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char[] charBuffer = new char[BUFFER_SIZE]; |
469 |
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StringBuffer buffer = new StringBuffer(); |
470 |
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|
471 |
|
InputStreamReader reader; |
472 |
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if (encoding != null) |
473 |
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reader = new InputStreamReader(new BufferedInputStream(stream), encoding); |
474 |
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else |
475 |
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reader = new InputStreamReader(new BufferedInputStream(stream)); |
476 |
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|
477 |
|
try |
478 |
|
{ |
479 |
|
while (true) |
480 |
|
{ |
481 |
0 |
int charsRead = reader.read(charBuffer, 0, BUFFER_SIZE); |
482 |
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|
483 |
0 |
if (charsRead <= 0) |
484 |
0 |
break; |
485 |
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|
486 |
0 |
buffer.append(charBuffer, 0, charsRead); |
487 |
0 |
} |
488 |
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} |
489 |
|
finally |
490 |
|
{ |
491 |
0 |
reader.close(); |
492 |
0 |
} |
493 |
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|
494 |
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|
495 |
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|
496 |
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|
497 |
0 |
int length = buffer.length(); |
498 |
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|
499 |
0 |
charBuffer = new char[length]; |
500 |
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|
501 |
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|
502 |
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|
503 |
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|
504 |
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buffer.getChars(0, length, charBuffer, 0); |
505 |
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|
506 |
0 |
return charBuffer; |
507 |
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} |
508 |
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|
509 |
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510 |
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|
511 |
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|
512 |
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|
513 |
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|
514 |
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|
515 |
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private String getTemplateExtension(IComponent component) |
516 |
|
{ |
517 |
0 |
return _componentPropertySource.getComponentProperty( |
518 |
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component, |
519 |
|
Tapestry.TEMPLATE_EXTENSION_PROPERTY); |
520 |
|
} |
521 |
|
|
522 |
|
private String getTemplateEncoding(IComponent component, Locale locale) |
523 |
|
{ |
524 |
0 |
return _componentPropertySource.getLocalizedComponentProperty( |
525 |
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component, |
526 |
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locale, |
527 |
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TEMPLATE_ENCODING_PROPERTY_NAME); |
528 |
|
} |
529 |
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|
530 |
|
|
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|
|
532 |
|
public void setParser(ITemplateParser parser) |
533 |
|
{ |
534 |
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_parser = parser; |
535 |
0 |
} |
536 |
|
|
537 |
|
|
538 |
|
|
539 |
|
public void setLog(Log log) |
540 |
|
{ |
541 |
0 |
_log = log; |
542 |
0 |
} |
543 |
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|
544 |
|
|
545 |
|
|
546 |
|
public void setDelegate(ITemplateSourceDelegate delegate) |
547 |
|
{ |
548 |
0 |
_delegate = delegate; |
549 |
0 |
} |
550 |
|
|
551 |
|
|
552 |
|
|
553 |
|
public void setComponentSpecificationResolver(ComponentSpecificationResolver resolver) |
554 |
|
{ |
555 |
0 |
_componentSpecificationResolver = resolver; |
556 |
0 |
} |
557 |
|
|
558 |
|
|
559 |
|
public void setContextRoot(Resource contextRoot) |
560 |
|
{ |
561 |
0 |
_contextRoot = contextRoot; |
562 |
0 |
} |
563 |
|
|
564 |
|
|
565 |
|
public void setComponentPropertySource(ComponentPropertySource componentPropertySource) |
566 |
|
{ |
567 |
0 |
_componentPropertySource = componentPropertySource; |
568 |
0 |
} |
569 |
|
|
570 |
|
|
571 |
|
public void setServiceId(String serviceId) |
572 |
|
{ |
573 |
0 |
_serviceId = serviceId; |
574 |
0 |
} |
575 |
|
|
576 |
|
|
577 |
|
public void setLocalizer(ResourceLocalizer localizer) |
578 |
|
{ |
579 |
0 |
_localizer = localizer; |
580 |
0 |
} |
581 |
|
|
582 |
|
public void setComponentResourceResolver(IComponentResourceResolver resourceResolver) |
583 |
|
{ |
584 |
0 |
_resourceResolver = resourceResolver; |
585 |
0 |
} |
586 |
|
} |