com.huawei.openstack4j.openstack.murano.v1.utils.MuranoApplicationUtils Maven / Gradle / Ivy

/*******************************************************************************
 * 	Copyright 2016 ContainX and OpenStack4j                                          
 * 	                                                                                 
 * 	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.huawei.openstack4j.openstack.murano.v1.utils;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.JsonNodeType;
import com.huawei.openstack4j.openstack.murano.v1.domain.MuranoApplication;

import java.io.IOException;
import java.util.Iterator;

/**
 * @author Nikolay Mahotkin.
 */
public class MuranoApplicationUtils {
    /**
     * Murano API has some methods which can return both item and List.
     * Need to cast it to one type which can be used further for convenience work.
     *
     * @param json JsonNode
     * @return a List of Applications
     */
    public static MuranoApplication.ApplicationList toApplications(JsonNode json) {
        ObjectMapper mapper = new ObjectMapper();
        MuranoApplication.ApplicationList list = new MuranoApplication.ApplicationList();

        if (json == null) {
            return list;
        }

        if (json.getNodeType() == JsonNodeType.ARRAY) {
            Iterator i = json.elements();

            while (i.hasNext()) {
                list.add(mapper.convertValue(i.next(), MuranoApplication.class));
            }
        } else if (json.getNodeType() == JsonNodeType.OBJECT) {
            list.add(mapper.convertValue(json, MuranoApplication.class));
        }

        return list;
    }

    /**
     * It is done due to the bug in restEasy connector: it can't send json
     * as String whereas all other connectors work fine.
     *
     * @param jsonString json-encoded String
     * @return ApplicationList representing the Applications given in @jsonString
     */
    public static MuranoApplication.ApplicationList toApplications(String jsonString) {
        ObjectMapper mapper = new ObjectMapper();
        JsonNode node = null;

        try {
            node = mapper.readValue(jsonString, JsonNode.class);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return toApplications(node);
    }
}