JSONB: Create Default method (#190)

* JSONB: Create Default method

Signed-off-by: Anders Swanson <anders.swanson@oracle.com>

Author: anders-swanson

database/starters/oracle-spring-boot-starter-json-collections/src/main/java/com/oracle/spring/json/jsonb/JSONB.java

@@ -1,12 +1,14 @@
-// Copyright (c) 2024, Oracle and/or its affiliates.
+// Copyright (c) 2024, 2025, Oracle and/or its affiliates.
 // Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
 package com.oracle.spring.json.jsonb;
 
+import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.ByteBuffer;
 
+import jakarta.json.bind.JsonbBuilder;
 import jakarta.json.stream.JsonGenerator;
 import jakarta.json.stream.JsonParser;
 import oracle.sql.json.OracleJsonFactory;
@@ -16,6 +18,10 @@ public class JSONB {
     private final OracleJsonFactory oracleJsonFactory;
     private final YassonJsonb jsonb;
 
+    public static JSONB createDefault() {
+        return new JSONB(new OracleJsonFactory(), (YassonJsonb) JsonbBuilder.create());
+    }
+
     public JSONB(OracleJsonFactory oracleJsonFactory, YassonJsonb jsonb) {
         this.oracleJsonFactory = oracleJsonFactory;
         this.jsonb = jsonb;
@@ -38,6 +44,12 @@ public JsonParser toJsonParser(Object o) {
         return oracleJsonFactory.createJsonBinaryParser(buf).wrap(JsonParser.class);
     }
 
+    public <T> T fromOSON(byte[] oson, Class<T> clazz) throws IOException {
+        try (ByteArrayInputStream inputStream = new ByteArrayInputStream(oson)) {
+            return fromOSON(inputStream, clazz);
+        }
+    }
+
     public <T> T fromOSON(JsonParser parser, Class<T> clazz) {
         return jsonb.fromJson(parser, clazz);
     }

database/starters/oracle-spring-boot-starter-json-collections/src/test/java/com/oracle/spring/json/jsonb/JSONBTest.java

@@ -1,8 +1,9 @@
-// Copyright (c) 2024, Oracle and/or its affiliates.
+// Copyright (c) 2024, 2025, Oracle and/or its affiliates.
 // Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
 package com.oracle.spring.json.jsonb;
 
 import java.io.ByteArrayInputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.nio.ByteBuffer;
 
@@ -18,7 +19,7 @@
 
 public class JSONBTest {
 
-    private JSONB jsonb = new JSONB(new OracleJsonFactory(), (YassonJsonb) JsonbBuilder.create());
+    private JSONB jsonb = JSONB.createDefault();
     private Student s = new Student(Student.newId(), "Alice", new StudentDetails(
             "Mathematics",
             3.77,
@@ -36,8 +37,7 @@ void toOSON() {
     void parserToObject() {
         JsonParser parser = jsonb.toJsonParser(s);
         Student student = jsonb.fromOSON(parser, Student.class);
-        assertThat(student).isNotNull();
-        assertThat(student).isEqualTo(s);
+        validateStudent(student);
     }
 
     @Test
@@ -46,16 +46,26 @@ void inputStreamToObject() {
         InputStream is = new ByteArrayInputStream(oson);
 
         Student student = jsonb.fromOSON(is, Student.class);
-        assertThat(student).isNotNull();
-        assertThat(student).isEqualTo(s);
+        validateStudent(student);
     }
 
     @Test
-    void byteBufferToOjbect() {
+    void byteBufferToObject() {
         byte[] oson = jsonb.toOSON(s);
         ByteBuffer buf = ByteBuffer.wrap(oson);
 
         Student student = jsonb.fromOSON(buf, Student.class);
+        validateStudent(student);
+    }
+
+    @Test
+    void byteArrayToObject() throws IOException {
+        byte[] oson = jsonb.toOSON(s);
+        Student student = jsonb.fromOSON(oson, Student.class);
+        validateStudent(student);
+    }
+
+    void validateStudent(Student student) {
         assertThat(student).isNotNull();
         assertThat(student).isEqualTo(s);
     }