001/* 002 * Portions of this software was developed by employees of the National Institute 003 * of Standards and Technology (NIST), an agency of the Federal Government and is 004 * being made available as a public service. Pursuant to title 17 United States 005 * Code Section 105, works of NIST employees are not subject to copyright 006 * protection in the United States. This software may be subject to foreign 007 * copyright. Permission in the United States and in foreign countries, to the 008 * extent that NIST may hold copyright, to use, copy, modify, create derivative 009 * works, and distribute this software and its documentation without fee is hereby 010 * granted on a non-exclusive basis, provided that this notice and disclaimer 011 * of warranty appears in all copies. 012 * 013 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER 014 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY 015 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF 016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM 017 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE 018 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT 019 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT, 020 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, 021 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY, 022 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR 023 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT 024 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER. 025 */ 026 027package gov.nist.secauto.metaschema.databind.io.json; 028 029import com.fasterxml.jackson.core.JsonFactory; 030import com.fasterxml.jackson.core.JsonGenerator; 031import com.fasterxml.jackson.core.util.DefaultPrettyPrinter; 032 033import gov.nist.secauto.metaschema.core.configuration.IMutableConfiguration; 034import gov.nist.secauto.metaschema.core.util.ObjectUtils; 035import gov.nist.secauto.metaschema.databind.io.AbstractSerializer; 036import gov.nist.secauto.metaschema.databind.io.SerializationFeature; 037import gov.nist.secauto.metaschema.databind.model.IAssemblyClassBinding; 038 039import java.io.IOException; 040import java.io.Writer; 041 042import edu.umd.cs.findbugs.annotations.NonNull; 043 044public class DefaultJsonSerializer<CLASS> 045 extends AbstractSerializer<CLASS> { 046 private JsonFactory jsonFactory; 047 048 /** 049 * Construct a new Module binding-based deserializer that reads JSON-based 050 * Module content. 051 * 052 * @param classBinding 053 * the assembly class binding describing the Java objects this 054 * deserializer parses data into 055 */ 056 public DefaultJsonSerializer(@NonNull IAssemblyClassBinding classBinding) { 057 super(classBinding); 058 } 059 060 /** 061 * Constructs a new JSON factory. 062 * <p> 063 * Subclasses can override this method to create a JSON factory with a specific 064 * configuration. 065 * 066 * @return the factory 067 */ 068 @NonNull 069 protected JsonFactory getJsonFactoryInstance() { 070 return JsonFactoryFactory.instance(); 071 } 072 073 @SuppressWarnings("PMD.NullAssignment") 074 @Override 075 protected void configurationChanged(IMutableConfiguration<SerializationFeature<?>> config) { 076 synchronized (this) { 077 jsonFactory = null; 078 } 079 } 080 081 @NonNull 082 private JsonFactory getJsonFactory() { 083 synchronized (this) { 084 if (jsonFactory == null) { 085 jsonFactory = getJsonFactoryInstance(); 086 } 087 assert jsonFactory != null; 088 return jsonFactory; 089 } 090 } 091 092 @SuppressWarnings("resource") 093 @NonNull 094 private JsonGenerator newJsonGenerator(@NonNull Writer writer) throws IOException { 095 JsonFactory factory = getJsonFactory(); 096 return ObjectUtils.notNull(factory.createGenerator(writer) 097 .setPrettyPrinter(new DefaultPrettyPrinter())); 098 } 099 100 @Override 101 public void serialize(CLASS data, Writer writer) throws IOException { 102 try (JsonGenerator generator = newJsonGenerator(writer)) { 103 IAssemblyClassBinding classBinding = getClassBinding(); 104 105 MetaschemaJsonWriter jsonWriter = new MetaschemaJsonWriter(generator); 106 107 jsonWriter.write(classBinding, data); 108 } 109 } 110 111}