com.eg.agent.android.activity.config.ActivityTraceConfigurationDeserializer Maven / Gradle / Ivy

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package com.eg.agent.android.activity.config;


import com.eg.agent.android.logging.AgentLog;
import com.eg.agent.android.logging.AgentLogManager;
import com.eg.google.gson.JsonArray;
import com.eg.google.gson.JsonDeserializationContext;
import com.eg.google.gson.JsonDeserializer;
import com.eg.google.gson.JsonElement;
import com.eg.google.gson.JsonParseException;
import com.eg.google.gson.JsonPrimitive;

import java.lang.reflect.Type;

public class ActivityTraceConfigurationDeserializer implements JsonDeserializer {
    private final AgentLog log = AgentLogManager.getAgentLog();

    public ActivityTraceConfiguration deserialize(JsonElement root, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
        ActivityTraceConfiguration configuration = new ActivityTraceConfiguration();
        if (root.isJsonArray()) {
            JsonArray array = root.getAsJsonArray();
            if (array.size() != 2) {
                error("Root array must contain 2 elements.");
                return null;
            }
            Integer maxTotalTraceCount = getInteger(array.get(0));
            if (maxTotalTraceCount == null) {
                return null;
            }
            if (maxTotalTraceCount.intValue() < 0) {
                error("The first element of the root array must not be negative.");
                return null;
            }
            configuration.setMaxTotalTraceCount(maxTotalTraceCount.intValue());
            return configuration;
        }
        error("Expected root element to be an array.");
        return null;
    }

    private Integer getInteger(JsonElement element) {
        if (element.isJsonPrimitive()) {
            JsonPrimitive primitive = element.getAsJsonPrimitive();
            if (primitive.isNumber()) {
                int value = primitive.getAsInt();
                if (value >= 0) {
                    return Integer.valueOf(value);
                }
                error("Integer value must not be negative");
                return null;
            }
            error("Expected an integer.");
            return null;
        }
        error("Expected an integer.");
        return null;
    }

    private void error(String message) {
        this.log.error("ActivityTraceConfigurationDeserializer: " + message);
    }
}