| /** |
| * 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.util; |
| |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import javax.xml.bind.JAXBContext; |
| import javax.xml.bind.JAXBException; |
| import javax.xml.bind.Marshaller; |
| import javax.xml.bind.Unmarshaller; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.model.Constants; |
| import org.apache.camel.model.OptionalIdentifiedDefinition; |
| |
| /** |
| * Helper for the Camel {@link org.apache.camel.model model} classes. |
| */ |
| public final class ModelHelper { |
| |
| private ModelHelper() { |
| // utility class |
| } |
| |
| /** |
| * Dumps the definition as XML |
| * |
| * @param definition the definition, such as a {@link org.apache.camel.model.RouteDefinition} |
| * @return the output in XML (is formatted) |
| * @throws JAXBException is throw if error marshalling to XML |
| */ |
| public static String dumpModelAsXml(OptionalIdentifiedDefinition definition) throws JAXBException { |
| // create a new jaxb context |
| // must use classloader from CamelContext to have JAXB working |
| JAXBContext jaxbContext = JAXBContext.newInstance(Constants.JAXB_CONTEXT_PACKAGES, CamelContext.class.getClassLoader()); |
| |
| Marshaller marshaller = jaxbContext.createMarshaller(); |
| marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); |
| StringWriter buffer = new StringWriter(); |
| marshaller.marshal(definition, buffer); |
| |
| return buffer.toString(); |
| } |
| |
| /** |
| * Marshal the xml to the model definition |
| * |
| * @param xml the xml |
| * @param type the definition type to return, will throw a {@link ClassCastException} if not the expected type |
| * @return the model definition |
| * @throws javax.xml.bind.JAXBException is thrown if error unmarshalling from xml to model |
| */ |
| public static <T extends OptionalIdentifiedDefinition> T createModelFromXml(String xml, Class<T> type) throws JAXBException { |
| // create a new jaxb context |
| // must use classloader from CamelContext to have JAXB working |
| JAXBContext jaxbContext = JAXBContext.newInstance(Constants.JAXB_CONTEXT_PACKAGES, CamelContext.class.getClassLoader()); |
| |
| StringReader reader = new StringReader(xml); |
| Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); |
| Object result = unmarshaller.unmarshal(reader); |
| reader.close(); |
| |
| if (result == null) { |
| throw new JAXBException("Cannot unmarshal to " + type + " using JAXB from XML: " + xml); |
| } |
| |
| return type.cast(result); |
| } |
| } |