org.apache.camel.component.cxf.converter.CxfConverter Maven / Gradle / Ivy
/*
* 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.component.cxf.converter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import javax.ws.rs.core.Response;
import javax.xml.namespace.QName;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import org.apache.camel.Converter;
import org.apache.camel.Exchange;
import org.apache.camel.TypeConverter;
import org.apache.camel.component.cxf.DataFormat;
import org.apache.camel.converter.stream.CachedOutputStream;
import org.apache.camel.spi.TypeConverterRegistry;
import org.apache.camel.support.ExchangeHelper;
import org.apache.cxf.message.MessageContentsList;
import static org.apache.camel.TypeConverter.MISS_VALUE;
/**
* The Type Converters for CXF related types' converting .
*/
@Converter(generateLoader = true)
public final class CxfConverter {
private CxfConverter() {
// Helper class
}
@Converter
public static MessageContentsList toMessageContentsList(final Object[] array) {
if (array != null) {
return new MessageContentsList(array);
} else {
return new MessageContentsList();
}
}
@Converter
public static QName toQName(String qname) {
return QName.valueOf(qname);
}
@Converter
public static Object[] toArray(Object object) {
if (object instanceof Collection) {
return ((Collection) object).toArray();
} else {
Object answer[];
if (object == null) {
answer = new Object[0];
} else {
answer = new Object[1];
answer[0] = object;
}
return answer;
}
}
@Converter
public static String soapMessageToString(final SOAPMessage soapMessage, Exchange exchange)
throws SOAPException, IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
soapMessage.writeTo(baos);
return baos.toString(ExchangeHelper.getCharsetName(exchange));
}
@Converter
public static InputStream soapMessageToInputStream(final SOAPMessage soapMessage, Exchange exchange)
throws SOAPException, IOException {
CachedOutputStream cos = new CachedOutputStream(exchange);
soapMessage.writeTo(cos);
InputStream in = cos.getInputStream();
return in;
}
@Converter
public static DataFormat toDataFormat(final String name) {
return DataFormat.valueOf(name.toUpperCase());
}
@Converter
public static InputStream toInputStream(Response response, Exchange exchange) {
Object obj = response.getEntity();
if (obj == null) {
return null;
}
if (obj instanceof InputStream) {
// short circuit the lookup
return (InputStream) obj;
}
TypeConverterRegistry registry = exchange.getContext().getTypeConverterRegistry();
TypeConverter tc = registry.lookup(InputStream.class, obj.getClass());
if (tc != null) {
return tc.convertTo(InputStream.class, exchange, obj);
}
return null;
}
/**
* Use a fallback type converter so we can convert the embedded list element if the value is MessageContentsList.
* The algorithm of this converter finds the first non-null list element from the list and applies conversion to the
* list element.
*
* @param type the desired type to be converted to
* @param exchange optional exchange which can be null
* @param value the object to be converted
* @param registry type converter registry
* @return the converted value of the desired type or null if no suitable converter found
*/
@SuppressWarnings("unchecked")
@Converter(fallback = true)
public static T convertTo(
Class type, Exchange exchange, Object value,
TypeConverterRegistry registry) {
// CXF-WS MessageContentsList class
if (MessageContentsList.class.isAssignableFrom(value.getClass())) {
MessageContentsList list = (MessageContentsList) value;
// try to turn the first array element into the object that we want
for (Object embedded : list) {
if (embedded != null) {
if (type.isInstance(embedded)) {
return type.cast(embedded);
} else {
TypeConverter tc = registry.lookup(type, embedded.getClass());
if (tc == null) {
// maybe one of its interface fits
for (Class clazz : embedded.getClass().getInterfaces()) {
tc = registry.lookup(type, clazz);
if (tc != null) {
break;
}
}
}
if (tc != null) {
Object result = tc.convertTo(type, exchange, embedded);
if (result != null) {
return (T) result;
}
// there is no suitable result will be return
break;
}
}
}
}
// return void to indicate its not possible to convert at this time
return (T) MISS_VALUE;
}
// CXF-RS Response class
if (Response.class.isAssignableFrom(value.getClass())) {
Response response = (Response) value;
Object entity = response.getEntity();
TypeConverter tc = registry.lookup(type, entity.getClass());
if (tc != null) {
return tc.convertTo(type, exchange, entity);
}
// return void to indicate its not possible to convert at this time
return (T) MISS_VALUE;
}
return null;
}
}