#210 prefix for ns

README.md

@@ -204,12 +204,18 @@ ATTR 'price', '$49.99';
 After the execution, `ATTR` doesn't move the cursor.
 
 If it's necessary to make sure the attribute belongs to a certain
-namespace, put the namespace into the attribute name separating
-it with a space from the name:
+namespace, put the namespace and its prefix into the 
+attribute name separating them with spaces:
 
 ```text
-ADD 'root';
-ATTR 'noNamespaceSchemaLocation http://www.w3.org/2001/XMLSchema-instance', 'https://...';
+ADD 'flower';
+ATTR 'noNamespaceSchemaLocation xsi http://www.w3.org/2001/XMLSchema-instance', 'foo.xsd';
+```
+
+This will generate the following document:
+
+```xml
+<flower xsi:noNamespaceSchemaLocation="foo.xsd"/>
 ```
 
 ### SET

src/main/java/org/xembly/AttrDirective.java

@@ -77,8 +77,10 @@ public Directive.Cursor exec(final Node dom,
         final String val = this.value.raw();
         final String[] parts = key.split(" ");
         for (final Node node : cursor) {
-            if (parts.length == 2) {
-                Element.class.cast(node).setAttributeNS(parts[1], parts[0], val);
+            if (parts.length == 3) {
+                Element.class.cast(node).setAttributeNS(
+                    parts[2], String.format("%s:%s", parts[1], parts[0]), val
+                );
             } else {
                 Element.class.cast(node).setAttribute(key, val);
             }

src/main/java/org/xembly/Transformers.java

@@ -65,8 +65,8 @@ final class Node implements Transformers {
          * @since 0.30
          */
         public Node() {
-            this.original = new Formatted(
-                new Default(),
+            this.original = new Transformers.Formatted(
+                new Transformers.Default(),
                 Collections.singletonMap(OutputKeys.OMIT_XML_DECLARATION, "yes")
             );
         }
@@ -95,9 +95,9 @@ final class Document implements Transformers {
          * @since 0.30
          */
         public Document() {
-            this.original = new Formatted(
-                new Default(),
-                Document.defaultProperties()
+            this.original = new Transformers.Formatted(
+                new Transformers.Default(),
+                Transformers.Document.defaultProperties()
             );
         }
 
@@ -139,7 +139,7 @@ final class Default implements Transformers {
          * @since 0.30
          */
         Default() {
-            this(Default.tfactory);
+            this(Transformers.Default.tfactory);
         }
 
         /**

src/test/java/org/xembly/AttrDirectiveTest.java

@@ -39,6 +39,7 @@
 import org.junit.jupiter.api.Test;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
+import org.w3c.dom.Node;
 
 /**
  * Test case for {@link AttrDirective}.
@@ -105,15 +106,18 @@ void addsCaseSensitiveAttributesDirectly() throws Exception {
 
     @Test
     void addAttributeWithNamespace() {
+        final Node node = new Xembler(
+            new Directives().add("boom").attr(
+                "noNamespaceSchemaLocation xsi http://www.w3.org/2001/XMLSchema-instance",
+                "foo.xsd"
+            )
+        ).domQuietly();
+        MatcherAssert.assertThat(
+            new XMLDocument(node).toString(),
+            Matchers.containsString("xsi:noNamespaceSchemaLocation")
+        );
         MatcherAssert.assertThat(
-            new XMLDocument(
-                new Xembler(
-                    new Directives().add("boom").attr(
-                        "noNamespaceSchemaLocation http://www.w3.org/2001/XMLSchema-instance",
-                        "foo.xsd"
-                    )
-                ).domQuietly()
-            ).nodes("/boom/@xsi:noNamespaceSchemaLocation"),
+            new XMLDocument(node).nodes("/boom/@xsi:noNamespaceSchemaLocation"),
             Matchers.not(Matchers.emptyIterable())
         );
     }

src/test/java/org/xembly/XemblerTest.java

@@ -236,4 +236,15 @@ void omitsHeader() {
             Matchers.equalTo("<animals><cow>му-му</cow></animals>")
         );
     }
+
+    @Test
+    void printsNamespaces() {
+        MatcherAssert.assertThat(
+            "XML output must have namespace prefixes",
+            new Xembler(
+                new Directives().add("flower").attr("color x html", "green")
+            ).xmlQuietly(),
+            Matchers.containsString("x:color=\"green\"")
+        );
+    }
 }