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| package org.apache.tapestry.services.impl; |
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| |
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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.net.URL; |
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| import java.util.ArrayList; |
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| import java.util.Collections; |
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| import java.util.HashMap; |
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| import java.util.Iterator; |
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| import java.util.List; |
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| import java.util.Locale; |
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| import java.util.Map; |
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| import java.util.Properties; |
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| |
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| import org.apache.hivemind.ApplicationRuntimeException; |
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| import org.apache.hivemind.Messages; |
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| import org.apache.hivemind.Resource; |
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| import org.apache.hivemind.util.Defense; |
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| import org.apache.hivemind.util.LocalizedNameGenerator; |
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| import org.apache.tapestry.IComponent; |
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| import org.apache.tapestry.INamespace; |
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| import org.apache.tapestry.event.ResetEventListener; |
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| import org.apache.tapestry.services.ComponentMessagesSource; |
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| import org.apache.tapestry.services.ComponentPropertySource; |
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| import org.apache.tapestry.util.text.LocalizedProperties; |
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| public class ComponentMessagesSourceImpl implements ComponentMessagesSource, ResetEventListener |
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| { |
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| private Properties _emptyProperties = new Properties(); |
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| private static final String SUFFIX = ".properties"; |
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| public static final String MESSAGES_ENCODING_PROPERTY_NAME = "org.apache.tapestry.messages-encoding"; |
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| private Map _componentCache = new HashMap(); |
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| private ComponentPropertySource _componentPropertySource; |
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| protected synchronized Properties getLocalizedProperties(IComponent component)
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| { |
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| Defense.notNull(component, "component");
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| |
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| Resource specificationLocation = component.getSpecification().getSpecificationLocation();
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| Locale locale = component.getPage().getLocale();
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| Map propertiesMap = findPropertiesMapForResource(specificationLocation);
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| Properties result = (Properties) propertiesMap.get(locale);
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| if (result == null)
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| { |
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| result = assembleComponentProperties(
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| component, |
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| specificationLocation, |
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| propertiesMap, |
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| locale); |
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| propertiesMap.put(locale, result);
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| } |
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| return result;
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| } |
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| private Map findPropertiesMapForResource(Resource resource)
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| { |
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| Map result = (Map) _componentCache.get(resource);
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| if (result == null)
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| { |
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| result = new HashMap();
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| _componentCache.put(resource, result);
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| } |
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| return result;
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| } |
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| private Properties getNamespaceProperties(IComponent component, Locale locale)
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| { |
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| INamespace namespace = component.getNamespace();
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| Resource namespaceLocation = namespace.getSpecificationLocation();
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| Map propertiesMap = findPropertiesMapForResource(namespaceLocation);
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| Properties result = (Properties) propertiesMap.get(locale);
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| if (result == null)
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| { |
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| result = assembleNamespaceProperties(namespace, propertiesMap, locale);
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| propertiesMap.put(locale, result);
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| } |
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| return result;
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| } |
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| private Properties assembleComponentProperties(IComponent component,
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| Resource baseResourceLocation, Map propertiesMap, Locale locale) |
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| { |
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| List localizations = findLocalizationsForResource(baseResourceLocation, locale);
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| Properties parent = getNamespaceProperties(component, locale);
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| Iterator i = localizations.iterator();
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| while (i.hasNext())
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| { |
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| ResourceLocalization rl = (ResourceLocalization) i.next();
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| Locale l = rl.getLocale();
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| Properties properties = (Properties) propertiesMap.get(l);
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| if (properties == null)
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| { |
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| properties = readComponentProperties(component, l, rl.getResource(), parent);
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| propertiesMap.put(l, properties);
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| } |
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| parent = properties;
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| } |
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| return parent;
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| } |
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| private Properties assembleNamespaceProperties(INamespace namespace, Map propertiesMap,
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| Locale locale) |
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| { |
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| List localizations = findLocalizationsForResource(
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| namespace.getSpecificationLocation(), |
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| locale); |
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| Properties parent = _emptyProperties;
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| Iterator i = localizations.iterator();
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| while (i.hasNext())
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| { |
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| ResourceLocalization rl = (ResourceLocalization) i.next();
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| Locale l = rl.getLocale();
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| Properties properties = (Properties) propertiesMap.get(l);
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| if (properties == null)
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| { |
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| properties = readNamespaceProperties(namespace, l, rl.getResource(), parent);
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| propertiesMap.put(l, properties);
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| } |
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| parent = properties;
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| } |
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| return parent;
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| |
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| } |
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| private List findLocalizationsForResource(Resource resource, Locale locale)
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| { |
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| List result = new ArrayList();
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| String baseName = extractBaseName(resource);
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| LocalizedNameGenerator g = new LocalizedNameGenerator(baseName, locale, SUFFIX);
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| while (g.more())
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| { |
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| String localizedName = g.next();
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| Locale l = g.getCurrentLocale();
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| Resource localizedResource = resource.getRelativeResource(localizedName);
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| result.add(new ResourceLocalization(l, localizedResource));
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| } |
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| Collections.reverse(result);
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| return result;
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| } |
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| private String extractBaseName(Resource baseResourceLocation)
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| { |
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| String fileName = baseResourceLocation.getName();
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| int dotx = fileName.lastIndexOf('.');
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| return fileName.substring(0, dotx);
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| } |
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| private Properties readComponentProperties(IComponent component, Locale locale,
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| Resource propertiesResource, Properties parent) |
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| { |
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| String encoding = getComponentMessagesEncoding(component, locale);
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| return readPropertiesResource(propertiesResource.getResourceURL(), encoding, parent);
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| } |
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| private Properties readNamespaceProperties(INamespace namespace, Locale locale,
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| Resource propertiesResource, Properties parent) |
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| { |
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| String encoding = getNamespaceMessagesEncoding(namespace, locale);
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| return readPropertiesResource(propertiesResource.getResourceURL(), encoding, parent);
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| } |
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| private Properties readPropertiesResource(URL resourceURL, String encoding, Properties parent)
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| { |
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| if (resourceURL == null)
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| return parent;
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| Properties result = new Properties(parent);
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| LocalizedProperties wrapper = new LocalizedProperties(result);
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| InputStream input = null;
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| try
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| { |
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| input = new BufferedInputStream(resourceURL.openStream());
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| if (encoding == null)
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| wrapper.load(input);
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| else |
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| wrapper.load(input, encoding);
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| |
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| input.close();
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| } |
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| catch (IOException ex) |
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| { |
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| throw new ApplicationRuntimeException(ImplMessages.unableToLoadProperties(
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| resourceURL, |
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| ex), ex); |
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| } |
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| finally |
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| { |
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| close(input);
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| } |
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| |
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| return result;
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| } |
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| private void close(InputStream is)
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| { |
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| if (is != null)
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| try
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| { |
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| is.close();
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| } |
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| catch (IOException ex) |
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| { |
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| } |
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| } |
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| public synchronized void resetEventDidOccur()
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| { |
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| _componentCache.clear();
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| } |
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| |
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| public Messages getMessages(IComponent component)
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| { |
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| return new ComponentMessages(component.getPage().getLocale(),
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| getLocalizedProperties(component)); |
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| } |
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| |
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| private String getComponentMessagesEncoding(IComponent component, Locale locale)
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| { |
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| String encoding = _componentPropertySource.getLocalizedComponentProperty(
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| component, |
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| locale, |
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| MESSAGES_ENCODING_PROPERTY_NAME); |
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| |
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| if (encoding == null)
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| encoding = _componentPropertySource.getLocalizedComponentProperty(
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| component, |
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| locale, |
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| TemplateSourceImpl.TEMPLATE_ENCODING_PROPERTY_NAME); |
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| |
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| return encoding;
|
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| } |
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| |
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| private String getNamespaceMessagesEncoding(INamespace namespace, Locale locale)
|
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| { |
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| return _componentPropertySource.getLocalizedNamespaceProperty(
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| namespace, |
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| locale, |
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| MESSAGES_ENCODING_PROPERTY_NAME); |
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| } |
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| |
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23
| public void setComponentPropertySource(ComponentPropertySource componentPropertySource)
|
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| { |
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| _componentPropertySource = componentPropertySource;
|
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| } |
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| } |