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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2019-2021 Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
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*/
package fish.payara.ejb.http.protocol.rs;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import jakarta.json.Json;
import jakarta.json.JsonArray;
import jakarta.json.JsonObject;
import jakarta.json.JsonReader;
import jakarta.json.JsonString;
import jakarta.json.JsonValue;
import jakarta.json.bind.Jsonb;
import jakarta.json.bind.JsonbBuilder;
import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.InternalServerErrorException;
import jakarta.ws.rs.WebApplicationException;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.MultivaluedMap;
import jakarta.ws.rs.ext.MessageBodyReader;
import jakarta.ws.rs.ext.Provider;
import fish.payara.ejb.http.protocol.InvokeMethodRequest;
import fish.payara.ejb.http.protocol.MediaTypes;
/**
* Reads the {@link InvokeMethodRequest} in case of JSONB serialisation.
*
* In that case the {@link InvokeMethodRequest#argValues} are JSON representation of the original {@code Object[]} for
* the method arguments.
*
* @author Jan Bernitt
*/
@Provider
@Consumes(MediaTypes.JSON)
public class JsonbInvokeMethodMessageBodyReader implements MessageBodyReader {
@Override
public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return InvokeMethodRequest.class.isAssignableFrom(type);
}
@Override
public InvokeMethodRequest readFrom(Class type, Type genericType, Annotation[] annotations,
MediaType mediaType, MultivaluedMap httpHeaders, InputStream entityStream)
throws IOException, WebApplicationException {
try (JsonReader jsonReader = Json.createReader(entityStream)) {
JsonObject json = jsonReader.readObject();
String[] argTypeNames = json.getJsonArray("argTypes").stream().map(JsonbInvokeMethodMessageBodyReader::text)
.toArray(String[]::new);
JsonArray actualTypes = json.getJsonArray("argActualTypes");
String[] argActualTypeNames = actualTypes == null ? argTypeNames
: actualTypes.stream().map(JsonbInvokeMethodMessageBodyReader::text).toArray(String[]::new);
return new InvokeMethodRequest(
json.getString("java.naming.security.principal", ""),
json.getString("java.naming.security.credentials", ""),
json.getString("lookup"),
json.getString("method"),
argTypeNames,
argActualTypeNames,
json.get("argValues"),
(args, method, argActualTypes, classloader) -> toObjects(method, argActualTypes, args));
}
}
private static String text(JsonValue value) {
return value instanceof JsonString ? ((JsonString) value).getString() : value.toString();
}
/**
* Convert JSON encoded method parameter values to their object instances
*/
private static Object[] toObjects(Method invoked, Type[] argActualTypes, Object encodedArgValues) {
try {
Object[] argValues = new Object[argActualTypes.length];
Type[] argFormalTypes = invoked.getGenericParameterTypes();
if (argValues.length > 0) {
JsonArray jsonArgValues = (JsonArray) encodedArgValues;
for (int i = 0; i < jsonArgValues.size(); i++) {
Type argFormalType = argFormalTypes[i];
Type argType = argFormalType instanceof ParameterizedType ? argFormalType : argActualTypes[i];
argValues[i] = toObject(jsonArgValues.get(i), argType);
}
}
return argValues;
} catch (InternalServerErrorException ex) {
throw ex;
} catch (RuntimeException ex) {
throw new InternalServerErrorException(
"Failed to de-serialise method arguments from binary representation.", ex);
}
}
private static Object toObject(JsonValue objectValue, Type type) {
try (Jsonb jsonb = JsonbBuilder.create()) {
return jsonb.fromJson(objectValue.toString(), type);
} catch (Exception ex) {
// cannot really happen. It is just from java.lang.AutoCloseable interface
throw new InternalServerErrorException("Failed to deserialize argument of type: " + type.toString(), ex);
}
}
}