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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 org.apache.camel.CamelContext;
import org.apache.camel.NoFactoryAvailableException;
import org.apache.camel.spi.DataFormat;
import org.apache.camel.spi.DataFormatResolver;
import org.apache.camel.spi.FactoryFinder;
/**
* Default data format resolver
*
* @version
*/
public class DefaultDataFormatResolver implements DataFormatResolver {
public static final String DATAFORMAT_RESOURCE_PATH = "META-INF/services/org/apache/camel/dataformat/";
protected FactoryFinder dataformatFactory;
public DataFormat resolveDataFormat(String name, CamelContext context) {
DataFormat dataFormat = lookup(context, name, DataFormat.class);
if (dataFormat == null) {
Class type = null;
try {
if (dataformatFactory == null) {
dataformatFactory = context.getFactoryFinder(DATAFORMAT_RESOURCE_PATH);
}
type = dataformatFactory.findClass(name);
} catch (NoFactoryAvailableException e) {
// ignore
} catch (Exception e) {
throw new IllegalArgumentException("Invalid URI, no DataFormat registered for scheme: " + name, e);
}
if (type == null) {
type = context.getClassResolver().resolveClass(name);
}
if (type != null) {
if (DataFormat.class.isAssignableFrom(type)) {
dataFormat = (DataFormat) context.getInjector().newInstance(type);
} else {
throw new IllegalArgumentException("Resolving dataformat: " + name + " detected type conflict: Not a DataFormat implementation. Found: " + type.getName());
}
}
}
return dataFormat;
}
private static T lookup(CamelContext context, String ref, Class type) {
try {
return context.getRegistry().lookupByNameAndType(ref, type);
} catch (Exception e) {
// need to ignore not same type and return it as null
return null;
}
}
}