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The Core Camel Java DSL based router
/**
* 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.impl;
import java.io.InputStream;
import java.net.URL;
import java.util.Enumeration;
import org.apache.camel.CamelContext;
import org.apache.camel.CamelContextAware;
import org.apache.camel.spi.ClassResolver;
import org.apache.camel.util.CastUtils;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.StringHelper;
/**
* Default class resolver that uses regular class loader to load classes.
*/
public class DefaultClassResolver implements ClassResolver, CamelContextAware {
private CamelContext camelContext;
public DefaultClassResolver() {
}
public DefaultClassResolver(CamelContext camelContext) {
this.camelContext = camelContext;
}
public void setCamelContext(CamelContext camelContext) {
this.camelContext = camelContext;
}
public CamelContext getCamelContext() {
return camelContext;
}
public Class resolveClass(String name) {
Class answer = loadClass(name, DefaultClassResolver.class.getClassLoader());
if (answer == null && getApplicationContextClassLoader() != null) {
// fallback and use application context class loader
answer = loadClass(name, getApplicationContextClassLoader());
}
return answer;
}
public Class resolveClass(String name, Class type) {
Class answer = CastUtils.cast(loadClass(name, DefaultClassResolver.class.getClassLoader()));
if (answer == null && getApplicationContextClassLoader() != null) {
// fallback and use application context class loader
answer = CastUtils.cast(loadClass(name, getApplicationContextClassLoader()));
}
return answer;
}
public Class resolveClass(String name, ClassLoader loader) {
return loadClass(name, loader);
}
public Class resolveClass(String name, Class type, ClassLoader loader) {
return CastUtils.cast(loadClass(name, loader));
}
public Class resolveMandatoryClass(String name) throws ClassNotFoundException {
Class answer = resolveClass(name);
if (answer == null) {
throw new ClassNotFoundException(name);
}
return answer;
}
public Class resolveMandatoryClass(String name, Class type) throws ClassNotFoundException {
Class answer = resolveClass(name, type);
if (answer == null) {
throw new ClassNotFoundException(name);
}
return answer;
}
public Class resolveMandatoryClass(String name, ClassLoader loader) throws ClassNotFoundException {
Class answer = resolveClass(name, loader);
if (answer == null) {
throw new ClassNotFoundException(name);
}
return answer;
}
public Class resolveMandatoryClass(String name, Class type, ClassLoader loader) throws ClassNotFoundException {
Class answer = resolveClass(name, type, loader);
if (answer == null) {
throw new ClassNotFoundException(name);
}
return answer;
}
public InputStream loadResourceAsStream(String uri) {
StringHelper.notEmpty(uri, "uri");
return ObjectHelper.loadResourceAsStream(uri, getApplicationContextClassLoader());
}
public URL loadResourceAsURL(String uri) {
StringHelper.notEmpty(uri, "uri");
return ObjectHelper.loadResourceAsURL(uri, getApplicationContextClassLoader());
}
public Enumeration loadResourcesAsURL(String uri) {
return loadAllResourcesAsURL(uri);
}
public Enumeration loadAllResourcesAsURL(String uri) {
StringHelper.notEmpty(uri, "uri");
return ObjectHelper.loadResourcesAsURL(uri);
}
protected Class loadClass(String name, ClassLoader loader) {
StringHelper.notEmpty(name, "name");
return ObjectHelper.loadClass(name, loader);
}
protected ClassLoader getApplicationContextClassLoader() {
return camelContext != null ? camelContext.getApplicationContextClassLoader() : null;
}
}