com.continuuity.loom.codec.json.upgrade.NodeUpgradeCodec.java Source code

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Here is the source code for com.continuuity.loom.codec.json.upgrade.NodeUpgradeCodec.java

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/*
 * Copyright 2012-2014, Continuuity, Inc.
 *
 * 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.continuuity.loom.codec.json.upgrade;

import com.continuuity.loom.admin.Service;
import com.continuuity.loom.cluster.Node;
import com.continuuity.loom.cluster.NodeProperties;
import com.google.common.reflect.TypeToken;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;

import java.lang.reflect.Type;
import java.util.Set;

/**
 * Codec for deserializing a {@link Node}. Used for backwards compatibility.
 */
public class NodeUpgradeCodec implements JsonDeserializer<Node> {

    @Override
    public Node deserialize(JsonElement json, Type type, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObj = json.getAsJsonObject();

        String id = context.deserialize(jsonObj.get("id"), String.class);
        String clusterId = context.deserialize(jsonObj.get("clusterId"), String.class);
        Set<Service> services = context.deserialize(jsonObj.get("services"), new TypeToken<Set<Service>>() {
        }.getType());

        JsonObject properties = jsonObj.getAsJsonObject("properties");
        String ipaddress = context.deserialize(properties.get("ipaddress"), String.class);
        String hostname = context.deserialize(properties.get("hostname"), String.class);
        Integer nodenum = context.deserialize(properties.get("nodenum"), Integer.class);
        if (nodenum == null) {
            nodenum = 0;
        }
        Set<String> automators = context.deserialize(properties.get("automators"), new TypeToken<Set<String>>() {
        }.getType());
        Set<String> nodeServices = context.deserialize(properties.get("services"), new TypeToken<Set<String>>() {
        }.getType());
        String hardwaretype = context.deserialize(properties.get("hardwaretype"), String.class);
        String imagetype = context.deserialize(properties.get("imagetype"), String.class);
        String flavor = context.deserialize(properties.get("flavor"), String.class);
        String image = context.deserialize(properties.get("image"), String.class);
        NodeProperties nodeProperties = NodeProperties.builder().setHostname(hostname).setIpaddress(ipaddress)
                .setNodenum(nodenum).setHardwaretype(hardwaretype).setImagetype(imagetype).setFlavor(flavor)
                .setImage(image).setAutomators(automators).setServiceNames(nodeServices).setSSHUser("root").build();
        return new Node(id, clusterId, services, nodeProperties);
    }
}