com.continuuity.loom.codec.json.current.ProvisionerCodec.java Source code

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Here is the source code for com.continuuity.loom.codec.json.current.ProvisionerCodec.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.current;

import com.continuuity.loom.provisioner.Provisioner;
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.Map;

/**
 * Codec for deserializing a {@link com.continuuity.loom.provisioner.Provisioner}.  Used so field checking can occur.
 */
public class ProvisionerCodec implements JsonDeserializer<Provisioner> {

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

        String id = context.deserialize(jsonObj.get("id"), String.class);
        String host = context.deserialize(jsonObj.get("host"), String.class);
        Integer port = context.deserialize(jsonObj.get("port"), Integer.class);
        Integer capacityTotal = context.deserialize(jsonObj.get("capacityTotal"), Integer.class);
        Map<String, Integer> usage = context.deserialize(jsonObj.get("usage"),
                new TypeToken<Map<String, Integer>>() {
                }.getType());
        Map<String, Integer> assignments = context.deserialize(jsonObj.get("assignments"),
                new TypeToken<Map<String, Integer>>() {
                }.getType());

        return new Provisioner(id, host, port, capacityTotal, usage, assignments);
    }
}