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/*
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* Copyright (c) 2018 - 2023, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
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*
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* Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package io.entgra.device.mgt.core.device.mgt.extensions.device.organization.api.beans;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import javax.ws.rs.Consumes;
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import javax.ws.rs.Produces;
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import javax.ws.rs.WebApplicationException;
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import javax.ws.rs.core.MediaType;
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import javax.ws.rs.core.MultivaluedMap;
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import javax.ws.rs.ext.MessageBodyReader;
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import javax.ws.rs.ext.MessageBodyWriter;
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import javax.ws.rs.ext.Provider;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Type;
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import static javax.ws.rs.core.MediaType.APPLICATION_JSON;
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@Provider
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@Produces(APPLICATION_JSON)
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@Consumes(APPLICATION_JSON)
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public class GsonMessageBodyHandler implements MessageBodyWriter<Object>, MessageBodyReader<Object> {
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public static final String DATE_FORMAT = "EEE, d MMM yyyy HH:mm:ss Z";
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private Gson gson;
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private static final String UTF_8 = "UTF-8";
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public boolean isReadable(Class<?> aClass, Type type, Annotation[] annotations, MediaType mediaType) {
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return true;
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}
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private Gson getGson() {
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if (gson == null) {
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final GsonBuilder gsonBuilder = new GsonBuilder();
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gson = gsonBuilder.setDateFormat(DATE_FORMAT).create();
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}
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return gson;
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}
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public Object readFrom(Class<Object> objectClass, Type type, Annotation[] annotations,
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MediaType mediaType, MultivaluedMap<String, String> stringStringMultivaluedMap,
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InputStream entityStream)
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throws IOException, WebApplicationException {
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InputStreamReader reader = new InputStreamReader(entityStream, "UTF-8");
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try {
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return getGson().fromJson(reader, type);
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} finally {
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reader.close();
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}
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}
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public boolean isWriteable(Class<?> aClass, Type type, Annotation[] annotations, MediaType mediaType) {
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return true;
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}
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public long getSize(Object o, Class<?> aClass, Type type, Annotation[] annotations, MediaType mediaType) {
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return -1;
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}
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public void writeTo(Object object, Class<?> aClass, Type type, Annotation[] annotations,
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MediaType mediaType, MultivaluedMap<String, Object> stringObjectMultivaluedMap,
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OutputStream entityStream)
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throws IOException, WebApplicationException {
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OutputStreamWriter writer = new OutputStreamWriter(entityStream, UTF_8);
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try {
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getGson().toJson(object, type, writer);
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} finally {
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writer.close();
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}
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}
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}
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