(cqfn#227) Refactor setting schema reference attribute

src/main/java/org/jpeek/Report.java

@@ -28,6 +28,7 @@
 import com.jcabi.xml.Sources;
 import com.jcabi.xml.StrictXML;
 import com.jcabi.xml.XML;
+import com.jcabi.xml.XMLDocument;
 import com.jcabi.xml.XSD;
 import com.jcabi.xml.XSDDocument;
 import com.jcabi.xml.XSL;
@@ -39,13 +40,11 @@
 import java.util.HashMap;
 import java.util.Map;
 import org.cactoos.collection.CollectionOf;
-import org.cactoos.io.InputOf;
 import org.cactoos.io.LengthOf;
 import org.cactoos.io.TeeInput;
-import org.cactoos.map.MapEntry;
-import org.cactoos.map.MapOf;
 import org.cactoos.text.TextOf;
-import org.cactoos.text.UncheckedText;
+import org.xembly.Directives;
+import org.xembly.Xembler;
 
 /**
  * Single report.
@@ -139,37 +138,16 @@ final class Report {
      * @param mean Mean
      * @param sigma Sigma
      * @checkstyle ParameterNumberCheck (10 lines)
-     * @todo #135:30min The current solution to add the reference to
-     *  'metric.xsd' in the generated 'metric.xml' is too complex for
-     *  the task at hand. Refactor towards a simpler solution that
-     *  ideally would just require one or two Xembly instructions to
-     *  add the required attribute.
      */
     @SuppressWarnings("unchecked")
     Report(final XML xml, final String name,
         final Map<String, Object> args,
         final double mean, final double sigma) {
         this.skeleton = xml;
         this.metric = name;
-        this.params = new MapOf<>(
-            args,
-            new MapEntry<>("schemaLocation", Report.SCHEMA_FILE)
-        );
+        this.params = args;
         this.post = new XSLChain(
             new CollectionOf<>(
-                new XSLDocument(
-                    new UncheckedText(
-                        new TextOf(
-                            new InputOf(
-                                Report.class.getResourceAsStream(
-                                    "xsl/metric-post-schemaloc.xsl"
-                                )
-                            )
-                        )
-                    ).asString(),
-                    Sources.DUMMY,
-                    this.params
-                ),
                 new XSLDocument(
                     Report.class.getResourceAsStream(
                         "xsl/metric-post-colors.xsl"
@@ -237,11 +215,23 @@ private XML xml() throws IOException {
                 String.format("XSL not found: %s", name)
             );
         }
-        return new XSLDocument(
-            new TextOf(res).asString(),
-            Sources.DUMMY,
-            this.params
-        ).transform(this.skeleton);
+        return new XMLDocument(
+            new Xembler(
+                new Directives().xpath("metric").attr(
+                    "xmlns:xsi",
+                    "http://www.w3.org/2001/XMLSchema-instance"
+                ).attr(
+                    "xsi:noNamespaceSchemaLocation",
+                    Report.SCHEMA_FILE
+                )
+            ).applyQuietly(
+                new XSLDocument(
+                    new TextOf(res).asString(),
+                    Sources.DUMMY,
+                    this.params
+                ).transform(this.skeleton).node()
+            )
+        );
     }
 
 }