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org.apache.cxf.jaxrs.utils.JAXBUtils 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.cxf.jaxrs.utils;
import java.io.Closeable;
import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import org.apache.cxf.common.logging.LogUtils;
public final class JAXBUtils {
private static final Logger LOG = LogUtils.getL7dLogger(JAXBUtils.class);
private JAXBUtils() {
}
public static JAXBContext createJaxbContext(Set> classes, Class>[] extraClass,
Map contextProperties) {
if (classes == null || classes.isEmpty()) {
return null;
}
org.apache.cxf.common.jaxb.JAXBUtils.scanPackages(classes, extraClass, null);
JAXBContext ctx;
try {
ctx = JAXBContext.newInstance(classes.toArray(new Class[0]), contextProperties);
return ctx;
} catch (JAXBException ex) {
LOG.log(Level.SEVERE, "No JAXB context can be created", ex);
}
return null;
}
public static void closeUnmarshaller(Unmarshaller u) {
if (u instanceof Closeable) {
//need to do this to clear the ThreadLocal cache
//see https://java.net/jira/browse/JAXB-1000
try {
((Closeable)u).close();
} catch (IOException e) {
//ignore
}
}
}
public static Object convertWithAdapter(Object obj,
Class> adapterClass,
Annotation[] anns) {
return useAdapter(obj,
getAdapter(adapterClass, anns),
false,
obj);
}
public static Class> getValueTypeFromAdapter(Class> expectedBoundType,
Class> defaultClass,
Annotation[] anns) {
try {
XmlJavaTypeAdapter adapter = getAdapter(expectedBoundType, anns);
if (adapter != null) {
Class> boundType = JAXBUtils.getTypeFromAdapter(adapter, null, true);
if (boundType != null && boundType.isAssignableFrom(expectedBoundType)) {
return JAXBUtils.getTypeFromAdapter(adapter, null, false);
}
}
} catch (Throwable ex) {
// ignore
}
return defaultClass;
}
public static XmlJavaTypeAdapter getAdapter(Class> objectClass, Annotation[] anns) {
XmlJavaTypeAdapter typeAdapter = AnnotationUtils.getAnnotation(anns, XmlJavaTypeAdapter.class);
if (typeAdapter == null) {
typeAdapter = objectClass.getAnnotation(XmlJavaTypeAdapter.class);
if (typeAdapter == null) {
// lets just try the 1st interface for now
Class>[] interfaces = objectClass.getInterfaces();
typeAdapter = interfaces.length > 0
? interfaces[0].getAnnotation(XmlJavaTypeAdapter.class) : null;
}
}
return typeAdapter;
}
public static Class> getTypeFromAdapter(XmlJavaTypeAdapter adapter, Class> theType,
boolean boundType) {
if (adapter != null) {
if (adapter.type() != XmlJavaTypeAdapter.DEFAULT.class) {
theType = adapter.type();
} else {
Type topAdapterType = adapter.value().getGenericSuperclass();
Class> superClass = adapter.value().getSuperclass();
while (superClass != null) {
Class> nextSuperClass = superClass.getSuperclass();
if (nextSuperClass != null && !Object.class.equals(nextSuperClass)) {
topAdapterType = superClass.getGenericSuperclass();
}
superClass = nextSuperClass;
}
Type[] types = InjectionUtils.getActualTypes(topAdapterType);
if (types != null && types.length == 2) {
int index = boundType ? 1 : 0;
theType = InjectionUtils.getActualType(types[index]);
}
}
}
return theType;
}
public static Object useAdapter(Object obj,
XmlJavaTypeAdapter typeAdapter,
boolean marshal) {
return useAdapter(obj, typeAdapter, marshal, obj);
}
@SuppressWarnings("unchecked")
public static Object useAdapter(Object obj,
XmlJavaTypeAdapter typeAdapter,
boolean marshal,
Object defaultValue) {
if (typeAdapter != null) {
try {
@SuppressWarnings("rawtypes")
XmlAdapter xmlAdapter = typeAdapter.value().getDeclaredConstructor().newInstance();
if (marshal) {
return xmlAdapter.marshal(obj);
}
return xmlAdapter.unmarshal(obj);
} catch (Exception ex) {
LOG.log(Level.INFO, "(un)marshalling failed, using defaultValue", ex);
}
}
return defaultValue;
}
}