com.continuuity.weave.internal.json.StateNodeCodec.java Source code

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Here is the source code for com.continuuity.weave.internal.json.StateNodeCodec.java

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/*
 * Copyright 2012-2013 Continuuity,Inc. All Rights Reserved.
 *
 * 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.weave.internal.json;

import com.continuuity.weave.api.ServiceController;
import com.continuuity.weave.internal.state.StateNode;
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 com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

import java.lang.reflect.Type;

/**
 *
 */
public final class StateNodeCodec implements JsonSerializer<StateNode>, JsonDeserializer<StateNode> {

    @Override
    public StateNode deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObj = json.getAsJsonObject();
        return new StateNode(ServiceController.State.valueOf(jsonObj.get("state").getAsString()),
                context.<StackTraceElement[]>deserialize(jsonObj.get("stackTraces"), StackTraceElement[].class));
    }

    @Override
    public JsonElement serialize(StateNode src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonObj = new JsonObject();
        jsonObj.addProperty("state", src.getState().name());
        if (src.getStackTraces() != null) {
            jsonObj.add("stackTraces", context.serialize(src.getStackTraces(), StackTraceElement[].class));
        }
        return jsonObj;
    }
}