1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * See LICENSE.txt included in this distribution for the specific 9 * language governing permissions and limitations under the License. 10 * 11 * When distributing Covered Code, include this CDDL HEADER in each 12 * file and include the License file at LICENSE.txt. 13 * If applicable, add the following below this CDDL HEADER, with the 14 * fields enclosed by brackets "[]" replaced with your own identifying 15 * information: Portions Copyright [yyyy] [name of copyright owner] 16 * 17 * CDDL HEADER END 18 */ 19 20 /* 21 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. 22 */ 23 package org.opengrok.indexer.web.messages; 24 25 import com.fasterxml.jackson.core.JsonProcessingException; 26 import com.fasterxml.jackson.databind.ObjectMapper; 27 import org.opengrok.indexer.logger.LoggerFactory; 28 29 import java.util.logging.Level; 30 31 public interface JSONable { 32 33 String EMPTY = ""; 34 35 /** 36 * Convert object to JSON. 37 * @return JSON string or empty string on error 38 */ toJSON()39 default String toJSON() { 40 ObjectMapper mapper = new ObjectMapper(); 41 try { 42 return mapper.writeValueAsString(this); 43 } catch (JsonProcessingException e) { 44 LoggerFactory.getLogger(JSONable.class).log(Level.WARNING, 45 String.format("failed to convert object of class %s to JSON: %s", 46 this.getClass().toString(), this), e); 47 return EMPTY; 48 } 49 } 50 } 51