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/**
* 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.cxf.transport;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import org.apache.cxf.Bus;
import org.apache.cxf.configuration.ConfiguredBeanLocator;
import org.apache.cxf.helpers.CastUtils;
/**
*
*/
public class TransportFinder {
Map map;
Set loaded;
Class cls;
ConfiguredBeanLocator locator;
public TransportFinder(Bus b,
Map m,
Set l,
Class c) {
map = m;
cls = c;
locator = b.getExtension(ConfiguredBeanLocator.class);
loaded = l;
}
public T findTransportForNamespace(final String namespace) {
if (locator == null) {
return null;
}
T factory = loadActivationNamespaces(namespace);
if (factory == null) {
factory = loadDefaultNamespace(namespace);
}
if (factory == null) {
factory = loadNoDefaultNamespace(namespace);
}
if (factory == null) {
loadAll();
factory = map.get(namespace);
}
return factory;
}
public T findTransportForURI(String uri) {
if (locator == null) {
return null;
}
//If the uri is related path or has no protocol prefix , we will set it to be http
if (uri.startsWith("/") || uri.indexOf(":") < 0) {
uri = "http://" + uri;
}
T factory = checkForURI(uri);
if (factory == null) {
//didn't find, now well need to search
factory = loadDefaultURIs(uri);
if (factory == null) {
loadAll();
factory = checkForURI(uri);
}
}
return factory;
}
private static Set getPrefixes(Object t) {
Set prefixes = null;
if (t instanceof AbstractTransportFactory) {
AbstractTransportFactory atf = (AbstractTransportFactory)t;
prefixes = atf.getUriPrefixes();
} else if (t instanceof DestinationFactory) {
DestinationFactory atf = (DestinationFactory)t;
prefixes = atf.getUriPrefixes();
} else if (t instanceof ConduitInitiator) {
ConduitInitiator atf = (ConduitInitiator)t;
prefixes = atf.getUriPrefixes();
}
return prefixes;
}
private boolean hasPrefix(String uri, Collection prefixes) {
if (prefixes == null) {
return false;
}
for (String prefix : prefixes) {
if (uri.startsWith(prefix)) {
return true;
}
}
return false;
}
public T checkForURI(String uri) {
//first attempt the ones already registered
for (T t : map.values()) {
if (hasPrefix(uri, getPrefixes(t))) {
return t;
}
}
return null;
}
private void loadAll() {
ConfiguredBeanLocator.BeanLoaderListener listener
= new ConfiguredBeanLocator.BeanLoaderListener() {
public boolean beanLoaded(String name, T bean) {
loaded.add(name);
registerBean(bean);
return false;
}
public boolean loadBean(String name, Class type) {
return !loaded.contains(name);
}
};
locator.loadBeansOfType(cls, listener);
}
private void registerBean(T bean) {
if (bean instanceof AbstractTransportFactory) {
if (((AbstractTransportFactory)bean).getTransportIds() != null) {
for (String ns
: ((AbstractTransportFactory)bean).getTransportIds()) {
if (!map.containsKey(ns)) {
map.put(ns, bean);
}
}
}
} else {
try {
Method m = bean.getClass().getMethod("getActivationNamespaces", new Class[0]);
Collection c = CastUtils.cast((Collection)m.invoke(bean));
for (String s : c) {
if (!map.containsKey(s)) {
map.put(s, bean);
}
}
} catch (Exception ex) {
//ignore
}
}
}
private T loadActivationNamespaces(final String namespace) {
//Try old method of having activationNamespaces configured in.
ConfiguredBeanLocator.BeanLoaderListener listener
= new ConfiguredBeanLocator.BeanLoaderListener() {
public boolean beanLoaded(String name, T bean) {
loaded.add(name);
if (!map.containsKey(namespace)) {
registerBean(bean);
}
return map.containsKey(namespace);
}
public boolean loadBean(String name, Class type) {
return locator.hasConfiguredPropertyValue(name,
"transportIds",
namespace);
}
};
locator.loadBeansOfType(cls, listener);
return map.get(namespace);
}
private T loadDefaultURIs(final String uri) {
//First attempt will be to examine the factory class
//for a DEFAULT_URIS field and use it
URIBeanLoaderListener listener
= new URIBeanLoaderListener(uri) {
public boolean loadBean(String name, Class type) {
try {
Field f = type.getField("DEFAULT_URIS");
Object o = f.get(null);
if (o instanceof Collection) {
Collection c = CastUtils.cast((Collection)o);
return hasPrefix(uri, c);
}
} catch (Exception ex) {
//ignore
}
return false;
}
};
locator.loadBeansOfType(cls, listener);
return listener.getFactory();
}
abstract class URIBeanLoaderListener implements ConfiguredBeanLocator.BeanLoaderListener {
T factory;
String uri;
URIBeanLoaderListener(String u) {
uri = u;
}
public T getFactory() {
return factory;
}
public boolean beanLoaded(String name, T bean) {
registerBean(bean);
if (hasPrefix(uri, getPrefixes(bean))) {
factory = bean;
return true;
}
return false;
}
}
private T loadDefaultNamespace(final String namespace) {
//First attempt will be to examine the factory class
//for a DEFAULT_NAMESPACES field and use it
ConfiguredBeanLocator.BeanLoaderListener listener
= new ConfiguredBeanLocator.BeanLoaderListener() {
public boolean beanLoaded(String name, T bean) {
loaded.add(name);
return map.containsKey(namespace);
}
public boolean loadBean(String name, Class type) {
if (loaded.contains(name)) {
return false;
}
try {
Field f = type.getField("DEFAULT_NAMESPACES");
Object o = f.get(null);
if (o instanceof Collection) {
Collection c = CastUtils.cast((Collection)o);
return c.contains(namespace);
}
} catch (Exception ex) {
//ignore
}
return false;
}
};
locator.loadBeansOfType(cls, listener);
return map.get(namespace);
}
private T loadNoDefaultNamespace(final String namespace) {
//Second attempt will be to examine the factory class
//for a DEFAULT_NAMESPACES field and if it doesn't exist, try
//loading. This will then load most of the "older" things
ConfiguredBeanLocator.BeanLoaderListener listener
= new ConfiguredBeanLocator.BeanLoaderListener() {
public boolean beanLoaded(String name, T bean) {
loaded.add(name);
registerBean(bean);
return map.containsKey(namespace);
}
public boolean loadBean(String name, Class type) {
if (loaded.contains(name)) {
return false;
}
try {
type.getField("DEFAULT_NAMESPACES");
return false;
} catch (Exception ex) {
//ignore
}
return true;
}
};
locator.loadBeansOfType(cls, listener);
return map.get(namespace);
}
}
