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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
MessageFinderImpl.java | 90% | 97.9% | 100% | 97.1% |
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// Copyright 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.hivemind.impl;
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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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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.hivemind.Resource;
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import org.apache.hivemind.internal.MessageFinder;
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import org.apache.hivemind.util.Defense;
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import org.apache.hivemind.util.IOUtils;
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import org.apache.hivemind.util.LocalizedNameGenerator;
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/**
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* @author Howard M. Lewis Ship
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* @since 1.1
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*/
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public class MessageFinderImpl implements MessageFinder |
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{ |
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private static final String EXTENSION = ".properties"; |
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private static class Localization |
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{ |
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private Locale _locale;
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private Resource _resource;
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Localization(Locale locale, Resource resource) |
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{ |
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_locale = locale; |
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_resource = resource; |
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} |
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public Locale getLocale()
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{ |
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return _locale;
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} |
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public Resource getResource()
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{ |
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return _resource;
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} |
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} |
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private Resource _baseResource;
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private String _baseName;
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private Map _propertiesMap = new HashMap(); |
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private Properties _emptyProperties = new Properties(); |
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public MessageFinderImpl(Resource baseResource)
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{ |
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Defense.notNull(baseResource, "baseResource");
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_baseResource = baseResource; |
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// Strip off the extension to form the base name
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// when building new (localized) resources.
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String name = _baseResource.getName(); |
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int dotx = name.lastIndexOf('.');
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_baseName = name.substring(0, dotx); |
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} |
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public String getMessage(String key, Locale locale)
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{ |
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return findProperties(locale).getProperty(key);
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} |
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private synchronized Properties findProperties(Locale locale) |
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{ |
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Properties result = (Properties) _propertiesMap.get(locale); |
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// If doesn't exist, build it (which will update the
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// propertiesMap as a side effect.
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if (result == null) |
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result = buildProperties(locale); |
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return result;
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} |
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private Properties buildProperties(Locale locale)
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{ |
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Properties result = _emptyProperties; |
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List localizations = findLocalizations(locale); |
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Iterator i = localizations.iterator(); |
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while (i.hasNext())
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{ |
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Localization l = (Localization) i.next(); |
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result = readProperties(l.getLocale(), l.getResource(), result); |
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} |
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return result;
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} |
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/**
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* Returns the properties, reading them if necessary. Properties may have been previously read
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* for this locale, in which case the cached value is returned. Also, if the resource doesn't
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* exist, then the parent is returned as is. Updates the propertiesMap cache.
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*/
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private Properties readProperties(Locale locale, Resource propertiesResource, Properties parent)
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{ |
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Properties result = (Properties) _propertiesMap.get(locale); |
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if (result != null) |
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return result;
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URL url = propertiesResource.getResourceURL(); |
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if (url == null) |
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result = parent; |
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else
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result = readPropertiesFile(url, parent); |
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_propertiesMap.put(locale, result); |
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return result;
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} |
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private Properties readPropertiesFile(URL url, Properties parent)
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{ |
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InputStream stream = null;
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Properties result = new Properties(parent);
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try
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{ |
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stream = new BufferedInputStream(url.openStream());
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result.load(stream); |
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stream.close(); |
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stream = null;
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} |
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catch (IOException ex)
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{ |
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throw new ApplicationRuntimeException(ImplMessages.unableToReadMessages(url), ex); |
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} |
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finally
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{ |
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IOUtils.close(stream); |
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} |
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return result;
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} |
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/**
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* Returns a List of Localizations, in order from most generic (i.e., hivemodule.properties) to
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* most specific (i.e., hivemodule_en_US_yokel.properties).
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*/
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private List findLocalizations(Locale locale)
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{ |
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List result = new ArrayList();
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LocalizedNameGenerator g = new LocalizedNameGenerator(_baseName, locale, EXTENSION);
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while (g.more())
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{ |
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String name = g.next(); |
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Localization l = new Localization(g.getCurrentLocale(), _baseResource
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.getRelativeResource(name)); |
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result.add(l); |
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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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} |
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