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...sistence/spring/data/webmvc/impl/EntityViewAwareJaxb2RootElementHttpMessageConverter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| /* | ||
| * Copyright 2014 - 2019 Blazebit. | ||
| * | ||
| * Licensed 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 com.blazebit.persistence.spring.data.webmvc.impl; | ||
|
|
||
| import com.blazebit.persistence.view.EntityViewManager; | ||
| import org.springframework.http.HttpHeaders; | ||
| import org.springframework.http.MediaType; | ||
| import org.springframework.http.converter.HttpMessageConversionException; | ||
| import org.springframework.http.converter.HttpMessageNotReadableException; | ||
| import org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter; | ||
| import org.springframework.util.Assert; | ||
|
|
||
| import javax.xml.bind.JAXBContext; | ||
| import javax.xml.bind.JAXBElement; | ||
| import javax.xml.bind.JAXBException; | ||
| import javax.xml.bind.Marshaller; | ||
| import javax.xml.bind.UnmarshalException; | ||
| import javax.xml.bind.Unmarshaller; | ||
| import javax.xml.bind.annotation.XmlRootElement; | ||
| import javax.xml.bind.annotation.adapters.XmlAdapter; | ||
| import javax.xml.transform.Source; | ||
| import java.io.IOException; | ||
| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.ConcurrentMap; | ||
|
|
||
| /** | ||
| * @author Christian Beikov | ||
| * @since 1.5.0 | ||
| */ | ||
| public class EntityViewAwareJaxb2RootElementHttpMessageConverter extends Jaxb2RootElementHttpMessageConverter { | ||
|
|
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| private final ConcurrentMap<Class<?>, JAXBContext> jaxbContexts = new ConcurrentHashMap<Class<?>, JAXBContext>(64); | ||
| private final EntityViewManager entityViewManager; | ||
|
|
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| public EntityViewAwareJaxb2RootElementHttpMessageConverter(EntityViewManager entityViewManager) { | ||
| this.entityViewManager = entityViewManager; | ||
| } | ||
|
|
||
| @Override | ||
| public boolean canRead(Class<?> clazz, MediaType mediaType) { | ||
| if (entityViewManager.getMetamodel().view(clazz) == null) { | ||
| return false; | ||
| } | ||
| return super.canRead(clazz, mediaType); | ||
| } | ||
|
|
||
| @Override | ||
| protected Object readFromSource(Class<?> clazz, HttpHeaders headers, Source source) throws IOException { | ||
| try { | ||
| Class<?> implementationClass = entityViewManager.getReference(clazz, null).getClass(); | ||
| source = processSource(source); | ||
| // TODO: Need the serialization class here instead | ||
| Unmarshaller unmarshaller = createUnmarshallerInternal(implementationClass); | ||
| if (clazz.isAnnotationPresent(XmlRootElement.class)) { | ||
| return unmarshaller.unmarshal(source); | ||
| } | ||
| else { | ||
| JAXBElement<?> jaxbElement = unmarshaller.unmarshal(source, implementationClass); | ||
| return jaxbElement.getValue(); | ||
| } | ||
| } | ||
| catch (NullPointerException ex) { | ||
| if (!isSupportDtd()) { | ||
| throw new HttpMessageNotReadableException("NPE while unmarshalling. " + | ||
| "This can happen on JDK 1.6 due to the presence of DTD " + | ||
| "declarations, which are disabled.", ex); | ||
| } | ||
| throw ex; | ||
| } | ||
| catch (UnmarshalException ex) { | ||
| throw new HttpMessageNotReadableException("Could not unmarshal to [" + clazz + "]: " + ex.getMessage(), ex); | ||
|
|
||
| } | ||
| catch (JAXBException ex) { | ||
| throw new HttpMessageConversionException("Could not instantiate JAXBContext: " + ex.getMessage(), ex); | ||
| } | ||
| } | ||
|
|
||
| protected Marshaller createMarshallerInternal(Class<?> clazz) { | ||
| try { | ||
| JAXBContext jaxbContext = getJaxbContextInternal(clazz); | ||
| Marshaller marshaller = jaxbContext.createMarshaller(); | ||
| customizeMarshaller(marshaller); | ||
| return marshaller; | ||
| } | ||
| catch (JAXBException ex) { | ||
| throw new HttpMessageConversionException( | ||
| "Could not create Marshaller for class [" + clazz + "]: " + ex.getMessage(), ex); | ||
| } | ||
| } | ||
|
|
||
| protected Unmarshaller createUnmarshallerInternal(Class<?> clazz) throws JAXBException { | ||
| try { | ||
| JAXBContext jaxbContext = getJaxbContextInternal(clazz); | ||
| Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); | ||
| // Register adapters | ||
| try { | ||
| unmarshaller.setAdapter((XmlAdapter) Class.forName("com.blazebit.persistence.examples.spring.data.webmvc.view.CatAdapter").newInstance()); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| customizeUnmarshaller(unmarshaller); | ||
| return unmarshaller; | ||
| } | ||
| catch (JAXBException ex) { | ||
| throw new HttpMessageConversionException( | ||
| "Could not create Unmarshaller for class [" + clazz + "]: " + ex.getMessage(), ex); | ||
| } | ||
| } | ||
|
|
||
| protected JAXBContext getJaxbContextInternal(Class<?> clazz) { | ||
| Assert.notNull(clazz, "'clazz' must not be null"); | ||
| JAXBContext jaxbContext = this.jaxbContexts.get(clazz); | ||
| if (jaxbContext == null) { | ||
| try { | ||
| // Map<Class<?>, Class<?>> map = new HashMap<>(); | ||
| // map.put(DirtyTracker.class, Object.class); | ||
| // jaxbContext = JAXBContext.newInstance(new Class[]{ clazz }, Collections.singletonMap("com.sun.xml.bind.subclassReplacements", map)); | ||
| jaxbContext = JAXBContext.newInstance(new Class[]{ clazz }); | ||
| this.jaxbContexts.putIfAbsent(clazz, jaxbContext); | ||
| } | ||
| catch (JAXBException ex) { | ||
| throw new HttpMessageConversionException( | ||
| "Could not instantiate JAXBContext for class [" + clazz + "]: " + ex.getMessage(), ex); | ||
| } | ||
| } | ||
| return jaxbContext; | ||
| } | ||
| } |
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