/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.core.osgi;
import org.apache.camel.CamelContext;
import org.apache.camel.NoSuchLanguageException;
import org.apache.camel.spi.Language;
import org.apache.camel.spi.LanguageResolver;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
public class OsgiLanguageResolver implements LanguageResolver {
private static final transient Log LOG = LogFactory.getLog(OsgiLanguageResolver.class);
private final BundleContext bundleContext;
public OsgiLanguageResolver(BundleContext bundleContext) {
this.bundleContext = bundleContext;
}
public Language resolveLanguage(String name, CamelContext context) {
// lookup in registry first
Object bean = null;
try {
bean = context.getRegistry().lookup(name);
if (bean != null && LOG.isDebugEnabled()) {
LOG.debug("Found language: " + name + " in registry: " + bean);
}
} catch (Exception e) {
if (LOG.isDebugEnabled()) {
LOG.debug("Ignored error looking up bean: " + name + ". Error: " + e);
}
}
if (bean instanceof Language) {
return (Language)bean;
}
Language lang = getLanguage(name, context);
if (lang != null) {
return lang;
}
LanguageResolver resolver = getLanguageResolver("default", context);
if (resolver != null) {
return resolver.resolveLanguage(name, context);
}
throw new NoSuchLanguageException(name);
}
protected Language getLanguage(String name, CamelContext context) {
LOG.trace("Finding Language: " + name);
try {
ServiceReference[] refs = bundleContext.getServiceReferences(LanguageResolver.class.getName(), "(language=" + name + ")");
if (refs != null && refs.length > 0) {
LanguageResolver resolver = (LanguageResolver) bundleContext.getService(refs[0]);
return resolver.resolveLanguage(name, context);
}
return null;
} catch (InvalidSyntaxException e) {
throw new RuntimeException(e); // Should never happen
}
}
protected LanguageResolver getLanguageResolver(String name, CamelContext context) {
LOG.trace("Finding LanguageResolver: " + name);
try {
ServiceReference[] refs = bundleContext.getServiceReferences(LanguageResolver.class.getName(), "(resolver=" + name + ")");
if (refs != null && refs.length > 0) {
LanguageResolver resolver = (LanguageResolver) bundleContext.getService(refs[0]);
return resolver;
}
return null;
} catch (InvalidSyntaxException e) {
throw new RuntimeException(e); // Should never happen
}
}
}