/** * MIT License * * Copyright (c) 2017, 2018, 2019 SourceLab.org (https://github.com/SourceLabOrg/kafka-webview/) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package org.sourcelab.kafka.webview.ui.manager.kafka.dto; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.JsonSerializer; import com.fasterxml.jackson.databind.SerializerProvider; import com.fasterxml.jackson.databind.ser.impl.UnknownSerializer; import java.io.IOException; /** * Attempts to serialize using Jackson, if that fails, falls back to using toString. */ public class ToStringSerializer extends JsonSerializer<Object> { @Override public void serialize( final Object value, final JsonGenerator gen, final SerializerProvider serializers ) throws IOException { if (value == null) { gen.writeString(""); return; } // See if we have a serializer that is NOT the unknown serializer final JsonSerializer serializer = serializers.findValueSerializer(value.getClass()); if (serializer != null && !(serializer instanceof UnknownSerializer)) { serializer.serialize(value, gen, serializers); return; } gen.writeString(value.toString()); } }