/**
* 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.model.transformer;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;
import org.apache.camel.CamelContext;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.Transformer;
/**
* Represents a CustomTransformer. One of the bean reference (ref) or fully qualified class name (type)
* of the custom {@link Transformer} needs to be specified.
*
* {@see TransformerDefinition}
* {@see Transformer}
*/
@Metadata(label = "transformation")
@XmlType(name = "customTransformer")
@XmlAccessorType(XmlAccessType.FIELD)
public class CustomTransformerDefinition extends TransformerDefinition {
@XmlAttribute
private String ref;
@XmlAttribute
private String className;
@Override
protected Transformer doCreateTransformer(CamelContext context) throws Exception {
if (ref == null && className == null) {
throw new IllegalArgumentException("'ref' or 'className' must be specified for customTransformer");
}
Transformer transformer;
if (ref != null) {
transformer = context.getRegistry().lookupByNameAndType(ref, Transformer.class);
if (transformer == null) {
throw new IllegalArgumentException("Cannot find transformer with ref:" + ref);
}
if (transformer.getModel() != null || transformer.getFrom() != null || transformer.getTo() != null) {
throw new IllegalArgumentException(String.format("Transformer '%s' is already in use. Please check if duplicate transformer exists.", ref));
}
} else {
Class<Transformer> transformerClass = context.getClassResolver().resolveMandatoryClass(className, Transformer.class);
if (transformerClass == null) {
throw new IllegalArgumentException("Cannot find transformer class: " + className);
}
transformer = context.getInjector().newInstance(transformerClass);
}
transformer.setCamelContext(context);
return transformer.setModel(getScheme())
.setFrom(getFromType())
.setTo(getToType());
}
public String getRef() {
return ref;
}
/**
* Set a bean reference of the {@link Transformer}
*
* @param ref the bean reference of the Transformer
*/
public void setRef(String ref) {
this.ref = ref;
}
public String getClassName() {
return className;
}
/**
* Set a class name of the {@link Transformer}
*
* @param className the class name of the Transformer
*/
public void setClassName(String className) {
this.className = className;
}
}