1 /*
2 * Portions of this software was developed by employees of the National Institute
3 * of Standards and Technology (NIST), an agency of the Federal Government and is
4 * being made available as a public service. Pursuant to title 17 United States
5 * Code Section 105, works of NIST employees are not subject to copyright
6 * protection in the United States. This software may be subject to foreign
7 * copyright. Permission in the United States and in foreign countries, to the
8 * extent that NIST may hold copyright, to use, copy, modify, create derivative
9 * works, and distribute this software and its documentation without fee is hereby
10 * granted on a non-exclusive basis, provided that this notice and disclaimer
11 * of warranty appears in all copies.
12 *
13 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
14 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
15 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
17 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
18 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE. IN NO EVENT
19 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
20 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
21 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
22 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
23 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
24 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
25 */
26
27 package gov.nist.secauto.metaschema.databind.io.json;
28
29 import com.fasterxml.jackson.core.JsonFactory;
30 import com.fasterxml.jackson.core.JsonGenerator;
31 import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
32
33 import gov.nist.secauto.metaschema.core.configuration.IMutableConfiguration;
34 import gov.nist.secauto.metaschema.core.util.ObjectUtils;
35 import gov.nist.secauto.metaschema.databind.io.AbstractSerializer;
36 import gov.nist.secauto.metaschema.databind.io.SerializationFeature;
37 import gov.nist.secauto.metaschema.databind.model.IAssemblyClassBinding;
38
39 import java.io.IOException;
40 import java.io.Writer;
41
42 import edu.umd.cs.findbugs.annotations.NonNull;
43
44 public class DefaultJsonSerializer<CLASS>
45 extends AbstractSerializer<CLASS> {
46 private JsonFactory jsonFactory;
47
48 /**
49 * Construct a new Module binding-based deserializer that reads JSON-based
50 * Module content.
51 *
52 * @param classBinding
53 * the assembly class binding describing the Java objects this
54 * deserializer parses data into
55 */
56 public DefaultJsonSerializer(@NonNull IAssemblyClassBinding classBinding) {
57 super(classBinding);
58 }
59
60 /**
61 * Constructs a new JSON factory.
62 * <p>
63 * Subclasses can override this method to create a JSON factory with a specific
64 * configuration.
65 *
66 * @return the factory
67 */
68 @NonNull
69 protected JsonFactory getJsonFactoryInstance() {
70 return JsonFactoryFactory.instance();
71 }
72
73 @SuppressWarnings("PMD.NullAssignment")
74 @Override
75 protected void configurationChanged(IMutableConfiguration<SerializationFeature<?>> config) {
76 synchronized (this) {
77 jsonFactory = null;
78 }
79 }
80
81 @NonNull
82 private JsonFactory getJsonFactory() {
83 synchronized (this) {
84 if (jsonFactory == null) {
85 jsonFactory = getJsonFactoryInstance();
86 }
87 assert jsonFactory != null;
88 return jsonFactory;
89 }
90 }
91
92 @SuppressWarnings("resource")
93 @NonNull
94 private JsonGenerator newJsonGenerator(@NonNull Writer writer) throws IOException {
95 JsonFactory factory = getJsonFactory();
96 return ObjectUtils.notNull(factory.createGenerator(writer)
97 .setPrettyPrinter(new DefaultPrettyPrinter()));
98 }
99
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 }