Java tutorial
/** * Copyright (c) 2010-2019 Contributors to the openHAB project * * See the NOTICE file(s) distributed with this work for additional * information. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License 2.0 which is available at * http://www.eclipse.org/legal/epl-2.0 * * SPDX-License-Identifier: EPL-2.0 */ package org.openhab.io.neeo.internal.serialization; import java.lang.reflect.Type; import java.util.Objects; import org.eclipse.jdt.annotation.NonNullByDefault; import org.eclipse.jdt.annotation.Nullable; import org.openhab.io.neeo.internal.models.ListUiAction; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializer; import com.google.gson.JsonElement; import com.google.gson.JsonParseException; import com.google.gson.JsonPrimitive; import com.google.gson.JsonSerializationContext; import com.google.gson.JsonSerializer; /** * Implementation of {@link JsonSerializer} and {@link JsonDeserializer} to serialize/deserialize * {@link ListUiAction} * * @author Tim Roberts - Initial Contribution */ @NonNullByDefault public class ListUiActionSerializer implements JsonSerializer<ListUiAction>, JsonDeserializer<ListUiAction> { @Override public ListUiAction deserialize(@Nullable JsonElement elm, @Nullable Type type, @Nullable JsonDeserializationContext jsonContext) throws JsonParseException { Objects.requireNonNull(elm, "elm cannot be null"); Objects.requireNonNull(type, "type cannot be null"); Objects.requireNonNull(jsonContext, "jsonContext cannot be null"); if (elm.isJsonNull()) { throw new JsonParseException("ListUiAction could not be parsed from null"); } return ListUiAction.parse(elm.getAsString()); } @Override public JsonElement serialize(ListUiAction ist, @Nullable Type type, @Nullable JsonSerializationContext jsonContext) { Objects.requireNonNull(ist, "ist cannot be null"); Objects.requireNonNull(type, "type cannot be null"); Objects.requireNonNull(jsonContext, "jsonContext cannot be null"); return new JsonPrimitive(ist.toString()); } }