Make MARCXML namespace for record elements configurable.

Not all MARCXML sources specify the required namespace URI (notably,
Alma General Publishing). By allowing the expected namespace to be
configured, or even skipped (by setting it to `null`), this will
resolve #330.

The record element is the only element that is restricted by namespace;
however, the original commit [1] doesn't provide any context as to why
the change was introduced.

[1] https://sourceforge.net/p/culturegraph/code/1507/

metafacture-biblio/src/main/java/org/metafacture/biblio/marc21/MarcXmlHandler.java

@@ -45,8 +45,17 @@ public final class MarcXmlHandler extends DefaultXmlPipe<StreamReceiver> {
     private static final String LEADER = "leader";
     private static final String TYPE = "type";
     private String currentTag = "";
+    private String namespace = NAMESPACE;
     private StringBuilder builder = new StringBuilder();
 
+    public void setNamespace(final String namespace) {
+        this.namespace = namespace;
+    }
+
+    private boolean checkNamespace(final String uri) {
+        return namespace == null || namespace.equals(uri);
+    }
+
     @Override
     public void startElement(final String uri, final String localName, final String qName, final Attributes attributes)
             throws SAXException {
@@ -58,7 +67,7 @@ public void startElement(final String uri, final String localName, final String
             }else if(CONTROLFIELD.equals(localName)){
                 builder = new StringBuilder();
                 currentTag = attributes.getValue("tag");
-            }else if(RECORD.equals(localName) && NAMESPACE.equals(uri)){
+            }else if(RECORD.equals(localName) && checkNamespace(uri)){
                 getReceiver().startRecord("");
                 getReceiver().literal(TYPE, attributes.getValue(TYPE));
             }else if(LEADER.equals(localName)){
@@ -77,7 +86,7 @@ public void endElement(final String uri, final String localName, final String qN
         }else if(CONTROLFIELD.equals(localName)){
             getReceiver().literal(currentTag, builder.toString().trim());
 
-        }else if(RECORD.equals(localName)  && NAMESPACE.equals(uri)){
+        }else if(RECORD.equals(localName) && checkNamespace(uri)){
             getReceiver().endRecord();
 
         }else if(LEADER.equals(localName)){

metafacture-biblio/src/test/java/org/metafacture/biblio/marc21/MarcXmlHandlerTest.java

@@ -16,6 +16,7 @@
 package org.metafacture.biblio.marc21;
 
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
 
 import org.junit.After;
 import org.junit.Before;
@@ -37,6 +38,8 @@ public final class MarcXmlHandlerTest {
     private static final String LEADER = "leader";
     private static final String CONTROLFIELD = "controlfield";
     private static final String NAMESPACE = "http://www.loc.gov/MARC21/slim";
+    private static final String RECORD = "record";
+    private static final String TYPE = "type";
 
     private MarcXmlHandler marcXmlHandler;
 
@@ -84,4 +87,46 @@ public void issue233ShouldNotRemoveWhitespaceFromLeader()
         verify(receiver).literal("leader", leaderValue);
     }
 
+    @Test
+    public void shouldRecognizeRecordsWithNamespace()
+            throws SAXException {
+        final AttributesImpl attributes = new AttributesImpl();
+
+        marcXmlHandler.startElement(NAMESPACE, RECORD, "", attributes);
+        marcXmlHandler.endElement(NAMESPACE, RECORD, "");
+
+        verify(receiver).startRecord("");
+        verify(receiver).literal(TYPE, null);
+        verify(receiver).endRecord();
+
+        verifyNoMoreInteractions(receiver);
+    }
+
+    @Test
+    public void shouldNotRecognizeRecordsWithoutNamespace()
+            throws SAXException {
+        final AttributesImpl attributes = new AttributesImpl();
+
+        marcXmlHandler.startElement(null, RECORD, "", attributes);
+        marcXmlHandler.endElement(null, RECORD, "");
+
+        verifyNoMoreInteractions(receiver);
+    }
+
+    @Test
+    public void issue330ShouldOptionallyRecognizeRecordsWithoutNamespace()
+            throws SAXException {
+        final AttributesImpl attributes = new AttributesImpl();
+
+        marcXmlHandler.setNamespace(null);
+        marcXmlHandler.startElement(null, RECORD, "", attributes);
+        marcXmlHandler.endElement(null, RECORD, "");
+
+        verify(receiver).startRecord("");
+        verify(receiver).literal(TYPE, null);
+        verify(receiver).endRecord();
+
+        verifyNoMoreInteractions(receiver);
+    }
+
 }