Add support to Jackson's JsonNode

jsonmerge-core/pom.xml

@@ -35,6 +35,7 @@
         <json-path.version>2.7.0</json-path.version>
         <json-org.version>20220320</json-org.version>
         <gson.version>2.9.1</gson.version>
+        <jackson.version>2.13.3</jackson.version>
     </properties>
 
     <dependencies>
@@ -73,5 +74,12 @@
             <optional>true</optional>
         </dependency>
 
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+            <optional>true</optional>
+        </dependency>
+
     </dependencies>
 </project>

jsonmerge-core/src/main/java/net/obvj/jsonmerge/provider/JacksonJsonNodeJsonProvider.java

@@ -0,0 +1,168 @@
+/*
+ * Copyright 2022 obvj.net
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.obvj.jsonmerge.provider;
+
+import java.util.Iterator;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.Spliterator;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * A specialized {@link JsonProvider} implementation for {@code Jackson}'s
+ * {@link JsonNode}.
+ *
+ * @author oswaldo.bapvic.jr (Oswaldo Junior)
+ * @since 1.0.0
+ *
+ * @see <a href="https://github.com/FasterXML/jackson">Jackson Project home</a>
+ * @see JsonNode
+ * @see ObjectNode
+ * @see ArrayNode
+ */
+public class JacksonJsonNodeJsonProvider implements JsonProvider
+{
+    private ObjectNode toJsonObject(final Object jsonObject)
+    {
+        return (ObjectNode) jsonObject;
+    }
+
+    private ArrayNode toJsonArray(final Object jsonArray)
+    {
+        return (ArrayNode) jsonArray;
+    }
+
+    /**
+     * Converts an object to a {@link JsonNode}.
+     *
+     * @param object the object to be converted
+     * @return a {@link JsonNode} from the specified object
+     */
+    public JsonNode toJsonNode(final Object object)
+    {
+        return object instanceof JsonNode ? (JsonNode) object
+                : new ObjectMapper().convertValue(object, JsonNode.class);
+    }
+
+    @Override
+    public boolean isJsonObject(final Object object)
+    {
+        return object instanceof ObjectNode;
+    }
+
+    @Override
+    public boolean isJsonArray(final Object object)
+    {
+        return object instanceof ArrayNode;
+    }
+
+    @Override
+    public boolean isEmpty(final Object jsonObject)
+    {
+        return toJsonObject(jsonObject).isEmpty();
+    }
+
+    @Override
+    public Object newJsonObject()
+    {
+        return JsonNodeFactory.instance.objectNode();
+    }
+
+    @Override
+    public Object newJsonObject(final Object sourceJsonObject)
+    {
+        return JsonNodeFactory.instance.objectNode().setAll(toJsonObject(sourceJsonObject));
+    }
+
+    @Override
+    public Object newJsonArray()
+    {
+        return JsonNodeFactory.instance.arrayNode();
+    }
+
+    @Override
+    public Object newJsonArray(final Object sourceJsonArray)
+    {
+        return JsonNodeFactory.instance.arrayNode().addAll(toJsonArray(sourceJsonArray));
+    }
+
+    @Override
+    public Set<Entry<String, Object>> entrySet(final Object jsonObject)
+    {
+        Iterator<Entry<String, JsonNode>> iterator = toJsonObject(jsonObject).fields();
+        Iterable<Entry<String, JsonNode>> iterable = () -> iterator;
+        return (Set) StreamSupport.stream(iterable.spliterator(), false).collect(Collectors.toSet());
+    }
+
+    @Override
+    public Object get(final Object jsonObject, final String key)
+    {
+        return toJsonObject(jsonObject).get(key);
+    }
+
+
+    @Override
+    public void put(final Object jsonObject, final String key, final Object value)
+    {
+        toJsonObject(jsonObject).set(key, toJsonNode(value));
+    }
+
+    @Override
+    public void putIfAbsent(final Object jsonObject, final String key, final Object value)
+    {
+        ObjectNode json = toJsonObject(jsonObject);
+        if (json.get(key) == null)
+        {
+            json.set(key, toJsonNode(value));
+        }
+    }
+
+    @Override
+    public void add(final Object jsonArray, final Object element)
+    {
+        toJsonArray(jsonArray).add(toJsonNode(element));
+    }
+
+    @Override
+    public void forEachElementInArray(final Object jsonArray, final Consumer<? super Object> action)
+    {
+        toJsonArray(jsonArray).forEach(action);
+    }
+
+    @Override
+    public boolean arrayContains(final Object jsonArray, final Object element)
+    {
+        return stream(jsonArray).anyMatch(element::equals);
+    }
+
+    @Override
+    public Stream<Object> stream(final Object jsonArray)
+    {
+        Spliterator<JsonNode> spliterator = toJsonArray(jsonArray).spliterator();
+        return (Stream) StreamSupport.stream(spliterator, false);
+    }
+
+}

jsonmerge-core/src/test/java/net/obvj/jsonmerge/JsonMergerJacksonJsonNodeJsonProviderTest.java

@@ -0,0 +1,108 @@
+package net.obvj.jsonmerge;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.net.URL;
+import java.util.List;
+
+import com.fasterxml.jackson.databind.json.JsonMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.jayway.jsonpath.Configuration;
+import com.jayway.jsonpath.JsonPath;
+import com.jayway.jsonpath.ParseContext;
+import com.jayway.jsonpath.spi.mapper.JacksonMappingProvider;
+
+import net.obvj.jsonmerge.provider.JacksonJsonNodeJsonProvider;
+
+/**
+ * Unit tests for the {@link JsonMerger} using the {@link JacksonJsonNodeJsonProvider}.
+ *
+ * @author oswaldo.bapvic.jr
+ * @since 1.0.0
+ */
+class JsonMergerJacksonJsonNodeJsonProviderTest extends JsonMergerTest<ObjectNode>
+{
+
+    private static Configuration configuration = Configuration.builder()
+            .jsonProvider(new com.jayway.jsonpath.spi.json.JacksonJsonNodeJsonProvider())
+            .mappingProvider(new JacksonMappingProvider()).build();
+
+    private static ParseContext context = JsonPath.using(configuration);
+
+    @Override
+    JacksonJsonNodeJsonProvider getProvider()
+    {
+        return new JacksonJsonNodeJsonProvider();
+    }
+
+    @Override
+    ObjectNode fromString(String string)
+    {
+        try
+        {
+            return new JsonMapper().readValue(string, ObjectNode.class);
+        }
+        catch (Exception e)
+        {
+            throw new AssertionError("Unable to parse JSON string", e);
+        }
+    }
+
+    @Override
+    ObjectNode fromFile(String path)
+    {
+        try
+        {
+            URL resource = JsonMerger.class.getClassLoader().getResource(path);
+            return new JsonMapper().readValue(resource.openStream(), ObjectNode.class);
+        }
+        catch (Exception e)
+        {
+            throw new AssertionError("Unable to load JSON file", e);
+        }
+    }
+
+    @Override
+    Object get(ObjectNode object, String jsonPath)
+    {
+        return context.parse(object).read(jsonPath);
+    }
+
+    @Override
+    void assertElement(Object expected, Object actual)
+    {
+        assertEquals(getProvider().toJsonNode(expected), actual);
+    }
+
+    @Override
+    void assertArray(List<?> expected, ObjectNode result, String jsonPath)
+    {
+        assertArray(expected, result, jsonPath, true);
+    }
+
+    @Override
+    void assertArray(List<?> expected, ObjectNode result, String jsonPath, boolean exactSize)
+    {
+        ArrayNode array = (ArrayNode) get(result, jsonPath);
+        assertArray(expected, array, exactSize);
+    }
+
+    private void assertArray(List<?> expected, ArrayNode array, boolean exactSize)
+    {
+        if (exactSize)
+        {
+            assertEquals(expected.size(), array.size());
+        }
+
+        expected.forEach(expectedElement ->
+        {
+            assertTrue(
+                    getProvider().stream(array)
+                            .anyMatch(getProvider().toJsonNode(expectedElement)::equals),
+                    () -> String.format("Expected element %s not found", expectedElement));
+        });
+    }
+
+}

jsonmerge-core/src/test/java/net/obvj/jsonmerge/provider/JacksonJsonNodeJsonProviderTest.java

@@ -0,0 +1,42 @@
+package net.obvj.jsonmerge.provider;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+
+/**
+ * Unit tests for the {@link JacksonJsonNodeJsonProvider} class.
+ *
+ * @author oswaldo.bapvic.jr
+ * @since 1.1.0
+ */
+class JacksonJsonNodeJsonProviderTest
+{
+    private static final ArrayNode ARRAY1 = JsonNodeFactory.instance.arrayNode();
+
+    static
+    {
+        ARRAY1.add("element1");
+        ARRAY1.add("element2");
+    }
+
+    private JsonProvider provider = new JacksonJsonNodeJsonProvider();
+
+    @Test
+    void newJsonArray_emptyJsonArray()
+    {
+        assertEquals(JsonNodeFactory.instance.arrayNode(), provider.newJsonArray());
+    }
+
+    @Test
+    void newJsonArray_sourceJsonArray_copy()
+    {
+        Object result = provider.newJsonArray(ARRAY1);
+        assertEquals(ARRAY1, result);
+        assertNotSame(ARRAY1, result);
+    }
+
+}

pom.xml

@@ -175,7 +175,6 @@
                     <encoding>UTF-8</encoding>
                     <show>public</show>
                     <aggregate>false</aggregate>
-                    <stylesheetfile>${project.basedir}/src/main/javadoc/stylesheet.css</stylesheetfile>
                 </configuration>
                 <executions>
                     <execution>