ResourceSetEntityView.java

/*******************************************************************************
 * Copyright 2017 The MIT Internet Trust Consortium
 *
 * 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 org.mitre.uma.view;

import java.io.IOException;
import java.io.Writer;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.mitre.openid.connect.config.ConfigurationPropertiesBean;
import org.mitre.openid.connect.view.JsonEntityView;
import org.mitre.uma.model.ResourceSet;
import org.mitre.util.JsonUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.validation.BeanPropertyBindingResult;
import org.springframework.web.servlet.view.AbstractView;

import com.google.common.base.Strings;
import com.google.gson.ExclusionStrategy;
import com.google.gson.FieldAttributes;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;
import com.google.gson.LongSerializationPolicy;

@Component(ResourceSetEntityView.VIEWNAME)
public class ResourceSetEntityView extends AbstractView {
    private static Logger logger = LoggerFactory.getLogger(JsonEntityView.class);

    public static final String VIEWNAME = "resourceSetEntityView";

    @Autowired
    private ConfigurationPropertiesBean config;

    private Gson gson = new GsonBuilder()
            .setExclusionStrategies(new ExclusionStrategy() {

                @Override
                public boolean shouldSkipField(FieldAttributes f) {

                    return false;
                }

                @Override
                public boolean shouldSkipClass(Class<?> clazz) {
                    // skip the JPA binding wrapper
                    if (clazz.equals(BeanPropertyBindingResult.class)) {
                        return true;
                    }
                    return false;
                }

            })
            .serializeNulls()
            .setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
            .setLongSerializationPolicy(LongSerializationPolicy.STRING)
            .create();

    @Override
    protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) {

        response.setContentType("application/json");


        HttpStatus code = (HttpStatus) model.get("code");
        if (code == null) {
            code = HttpStatus.OK; // default to 200
        }

        response.setStatus(code.value());

        String location = (String) model.get("location");
        if (!Strings.isNullOrEmpty(location)) {
            response.setHeader(HttpHeaders.LOCATION, location);
        }

        try {

            Writer out = response.getWriter();
            ResourceSet rs = (ResourceSet) model.get("entity");

            JsonObject o = new JsonObject();

            o.addProperty("_id", rs.getId().toString()); // send the id as a string
            o.addProperty("user_access_policy_uri", config.getIssuer() + "manage/resource/" + rs.getId());
            o.addProperty("name", rs.getName());
            o.addProperty("uri", rs.getUri());
            o.addProperty("type", rs.getType());
            o.add("scopes", JsonUtils.getAsArray(rs.getScopes()));
            o.addProperty("icon_uri", rs.getIconUri());

            gson.toJson(o, out);

        } catch (IOException e) {

            logger.error("IOException in ResourceSetEntityView.java: ", e);

        }
    }

}