/**
* Copyright © 2006-2016 Web Cohesion (info@webcohesion.com)
*
* 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.webcohesion.enunciate.modules.jackson.model.util;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.util.Converter;
import com.webcohesion.enunciate.EnunciateException;
import com.webcohesion.enunciate.javac.decorations.Annotations;
import com.webcohesion.enunciate.javac.decorations.DecoratedProcessingEnvironment;
import com.webcohesion.enunciate.javac.decorations.type.DecoratedDeclaredType;
import com.webcohesion.enunciate.javac.decorations.type.DecoratedTypeMirror;
import com.webcohesion.enunciate.javac.decorations.type.TypeMirrorUtils;
import com.webcohesion.enunciate.modules.jackson.EnunciateJacksonContext;
import com.webcohesion.enunciate.modules.jackson.model.Accessor;
import com.webcohesion.enunciate.modules.jackson.model.adapters.AdapterType;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeMirror;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import java.util.List;
import java.util.concurrent.Callable;
/**
* Consolidation of common logic for implementing the Jackson contract.
*
* @author Ryan Heaton
*/
@SuppressWarnings ( "unchecked" )
public class JacksonUtil {
private JacksonUtil() {}
public static DecoratedDeclaredType getNormalizedCollection(DecoratedTypeMirror typeMirror, DecoratedProcessingEnvironment env) {
DecoratedDeclaredType base = typeMirror.isList() ? TypeMirrorUtils.listType(env) : typeMirror.isCollection() ? TypeMirrorUtils.collectionType(env) : null;
if (base != null) {
//now narrow the component type to what can be valid json.
List<? extends DecoratedTypeMirror> typeArgs = (List<? extends DecoratedTypeMirror>) ((DeclaredType)typeMirror).getTypeArguments();
if (typeArgs.size() == 1) {
DecoratedTypeMirror componentType = typeArgs.get(0);
base = (DecoratedDeclaredType) env.getTypeUtils().getDeclaredType((TypeElement) base.asElement(), componentType);
}
}
return base;
}
/**
* Finds the adapter type for the specified declaration, if any.
*
* @param declaration The declaration for which to find that adapter type.
* @param context The context.
* @return The adapter type, or null if none was specified.
*/
public static AdapterType findAdapterType(Element declaration, EnunciateJacksonContext context) {
if (declaration instanceof Accessor) {
//jaxb accessor can be adapted.
Accessor accessor = ((Accessor) declaration);
return findAdapterType(accessor.getAccessorType(), accessor, context);
}
else if (declaration instanceof ExecutableElement) {
//assume the return type of the method is adaptable (e.g. web results, fault bean getters).
ExecutableElement method = ((ExecutableElement) declaration);
return findAdapterType((DecoratedTypeMirror) method.getReturnType(), method, context);
}
else if (declaration instanceof TypeElement) {
return findAdapterType((DecoratedDeclaredType) declaration.asType(), null, context);
}
else {
throw new IllegalArgumentException("A " + declaration.getClass().getSimpleName() + " is not an adaptable declaration according to the JAXB spec.");
}
}
private static AdapterType findAdapterType(DecoratedTypeMirror maybeContainedAdaptedType, Element referer, EnunciateJacksonContext context) {
DecoratedProcessingEnvironment env = context.getContext().getProcessingEnvironment();
TypeMirror adaptedType = TypeMirrorUtils.getComponentType(maybeContainedAdaptedType, env);
final boolean isContained = adaptedType != null;
adaptedType = isContained ? adaptedType : maybeContainedAdaptedType;
JsonSerialize serializationInfo = referer != null ? referer.getAnnotation(JsonSerialize.class) : null;
if (serializationInfo == null && adaptedType instanceof DeclaredType) {
serializationInfo = ((DeclaredType) adaptedType).asElement().getAnnotation(JsonSerialize.class);
}
if (serializationInfo != null) {
final JsonSerialize finalInfo = serializationInfo;
DecoratedTypeMirror adapterTypeMirror = Annotations.mirrorOf(new Callable<Class<?>>() {
@Override
public Class<?> call() throws Exception { return isContained ? finalInfo.contentConverter() : finalInfo.converter(); }
}, env, Converter.None.class);
if (adapterTypeMirror instanceof DeclaredType) {
return new AdapterType((DeclaredType) adapterTypeMirror, context);
}
}
if (context.isHonorJaxb()) {
XmlJavaTypeAdapter typeAdapterInfo = referer != null ? referer.getAnnotation(XmlJavaTypeAdapter.class) : null;
if (adaptedType instanceof DeclaredType) {
if (typeAdapterInfo == null) {
typeAdapterInfo = ((DeclaredType) adaptedType).asElement().getAnnotation(XmlJavaTypeAdapter.class);
}
}
if (typeAdapterInfo != null) {
final XmlJavaTypeAdapter finalInfo = typeAdapterInfo;
DecoratedTypeMirror adapterTypeMirror = Annotations.mirrorOf(new Callable<Class<?>>() {
@Override
public Class<?> call() throws Exception {
return finalInfo.value();
}
}, env);
if (adapterTypeMirror instanceof DecoratedDeclaredType) {
return new AdapterType((DecoratedDeclaredType) adapterTypeMirror, context);
}
}
}
return null;
}
}