SettingsJsonAdapter.java

/*******************************************************************************
 * Copyright (c) 2017 Skymatic UG (haftungsbeschränkt).
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the accompanying LICENSE file.
 *******************************************************************************/
package org.cryptomator.common.settings;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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

import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;

public class SettingsJsonAdapter extends TypeAdapter<Settings> {

	private static final Logger LOG = LoggerFactory.getLogger(SettingsJsonAdapter.class);

	private final VaultSettingsJsonAdapter vaultSettingsJsonAdapter = new VaultSettingsJsonAdapter();

	@Override
	public void write(JsonWriter out, Settings value) throws IOException {
		out.beginObject();
		out.name("directories");
		writeVaultSettingsArray(out, value.getDirectories());
		out.name("checkForUpdatesEnabled").value(value.checkForUpdates().get());
		out.name("port").value(value.port().get());
		out.name("useIpv6").value(value.useIpv6().get());
		out.name("numTrayNotifications").value(value.numTrayNotifications().get());
		out.name("preferredGvfsScheme").value(value.preferredGvfsScheme().get());
		out.name("debugMode").value(value.debugMode().get());
		out.endObject();
	}

	private void writeVaultSettingsArray(JsonWriter out, Iterable<VaultSettings> vaultSettings) throws IOException {
		out.beginArray();
		for (VaultSettings value : vaultSettings) {
			vaultSettingsJsonAdapter.write(out, value);
		}
		out.endArray();
	}

	@Override
	public Settings read(JsonReader in) throws IOException {
		Settings settings = new Settings();

		in.beginObject();
		while (in.hasNext()) {
			String name = in.nextName();
			switch (name) {
			case "directories":
				settings.getDirectories().addAll(readVaultSettingsArray(in));
				break;
			case "checkForUpdatesEnabled":
				settings.checkForUpdates().set(in.nextBoolean());
				break;
			case "port":
				settings.port().set(in.nextInt());
				break;
			case "useIpv6":
				// Temporarily we will disable loading this setting, as we want the default value on each app start.
				// This setting might be removed completely in the future
				// settings.useIpv6().set(in.nextBoolean());
				in.skipValue();
				break;
			case "numTrayNotifications":
				settings.numTrayNotifications().set(in.nextInt());
				break;
			case "preferredGvfsScheme":
				settings.preferredGvfsScheme().set(in.nextString());
				break;
			case "debugMode":
				settings.debugMode().set(in.nextBoolean());
				break;
			default:
				LOG.warn("Unsupported vault setting found in JSON: " + name);
				in.skipValue();
			}
		}
		in.endObject();

		return settings;
	}

	private List<VaultSettings> readVaultSettingsArray(JsonReader in) throws IOException {
		List<VaultSettings> result = new ArrayList<>();
		in.beginArray();
		while (!JsonToken.END_ARRAY.equals(in.peek())) {
			result.add(vaultSettingsJsonAdapter.read(in));
		}
		in.endArray();
		return result;
	}

}