it.polimi.tower4clouds.model.ontology.Resource.java Source code

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Here is the source code for it.polimi.tower4clouds.model.ontology.Resource.java

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/**
 * Copyright (C) 2014 Politecnico di Milano (marco.miglierina@polimi.it)
 *
 * 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 it.polimi.tower4clouds.model.ontology;

import java.util.HashSet;
import java.util.Set;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;

public class Resource {

    private static final JsonParser jsonParser = new JsonParser();
    private static final Gson gson = new Gson();
    private static final Logger logger = LoggerFactory.getLogger(Resource.class);

    private String clazz;
    private String type;
    private String id;

    public Resource(String type, String id) {
        this();
        setType(type);
        setId(id);
    }

    public Resource() {
        this.clazz = getClass().getSimpleName();
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getClazz() {
        return clazz;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((clazz == null) ? 0 : clazz.hashCode());
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        result = prime * result + ((type == null) ? 0 : type.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Resource other = (Resource) obj;
        if (clazz == null) {
            if (other.clazz != null)
                return false;
        } else if (!clazz.equals(other.clazz))
            return false;
        if (id == null) {
            if (other.id != null)
                return false;
        } else if (!id.equals(other.id))
            return false;
        if (type == null) {
            if (other.type != null)
                return false;
        } else if (!type.equals(other.type))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "Resource [clazz=" + clazz + ", type=" + type + ", id=" + id + "]";
    }

    public static Resource fromJsonResource(String json) {
        Resource resource = null;
        try {
            String clazz = Resource.class.getPackage().getName() + "."
                    + jsonParser.parse(json).getAsJsonObject().get("clazz").getAsString();
            resource = (Resource) gson.fromJson(json, Resource.class.getClassLoader().loadClass(clazz));
        } catch (Exception e) {
            logger.error("Cannot deserialized json to a valid resource", e);
        }
        return resource;
    }

    public static Set<Resource> fromJsonResources(String json) {
        Set<Resource> resources = new HashSet<Resource>();
        JsonArray jsonResources = jsonParser.parse(json).getAsJsonArray();
        for (JsonElement jsonElement : jsonResources) {
            resources.add(fromJsonResource(jsonElement.toString()));
        }
        return resources;
    }

    public String toJson() {
        return gson.toJson(this);
    }

    public String toJson(Set<Resource> resources) {
        return gson.toJson(resources);
    }

}