#49 mapper with declaration

src/main/java/io/github/eocqrs/eokson/JsonXML.java

@@ -24,8 +24,6 @@
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.dataformat.xml.XmlMapper;
-import com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator;
 import org.cactoos.Text;
 
 /**
@@ -58,15 +56,15 @@ public JsonXML(final Json jsn, final String rt) {
 
   @Override
   public String asString() throws Exception {
-    final XmlMapper xml = new XmlMapper();
     final ObjectMapper mapper = new ObjectMapper();
     final JsonNode node = mapper.readTree(
       new Jocument(
         this.json
       ).pretty()
     );
-    xml.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, true);
-    return xml.writer()
+    return new WithDeclaration()
+      .value()
+      .writer()
       .withRootName(this.root)
       .writeValueAsString(node);
   }

src/main/java/io/github/eocqrs/eokson/WithDeclaration.java

@@ -0,0 +1,42 @@
+/*
+ *  Copyright (c) 2023 Aliaksei Bialiauski, EO-CQRS
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.eocqrs.eokson;
+
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator;
+
+/**
+ * XML Mapper With Declaration.
+ *
+ * @author Aliaksei Bialiauski ([email protected])
+ * @since 0.3.2
+ */
+final class WithDeclaration implements Scalar<XmlMapper> {
+
+  @Override
+  public XmlMapper value() {
+    final XmlMapper xml = new XmlMapper();
+    xml.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, true);
+    return xml;
+  }
+}

src/test/java/io/github/eocqrs/eokson/WithDeclarationTest.java

@@ -0,0 +1,47 @@
+/*
+ *  Copyright (c) 2023 Aliaksei Bialiauski, EO-CQRS
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.eocqrs.eokson;
+
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Test case for {@link WithDeclaration}.
+ *
+ * @author Aliaksei Bialiauski ([email protected])
+ * @since 0.3.2
+ */
+final class WithDeclarationTest {
+
+  @Test
+  void readsMapperInRightFormat() {
+    final XmlMapper mapper = new WithDeclaration().value();
+    MatcherAssert.assertThat(
+      "Mapper is present",
+      mapper,
+      Matchers.notNullValue()
+    );
+  }
+}