Add setting to emit leader as a whole

As a "leader" field is possible in marc21 this makes it possible to access the
whole leader, thus enhancing the already possible access of bibliographically
relevant part of it.

See #300.

Author: dr0i

metafacture-biblio/src/main/java/org/metafacture/biblio/iso2709/Record.java

@@ -156,6 +156,14 @@ public String getRecordId() {
         return buffer.stringAt(dataStart, dataLength, charset);
     }
 
+    /**
+     * Returns the record leader.
+     *
+     * @return a string which is the record leader.
+     */
+    public String getLabel() {
+        return label.toString();
+    }
     /**
      * Iterates through all fields in the record and calls the appropriate method
      * on the supplied {@link FieldHandler} instance.

metafacture-biblio/src/main/java/org/metafacture/biblio/marc21/Marc21Decoder.java

@@ -140,6 +140,7 @@ public final class Marc21Decoder
     private final FieldHandler fieldHandler = new Marc21Handler();
 
     private boolean ignoreMissingId;
+    private boolean emitLeaderAsWhole;
 
     /**
      * Controls whether the decoder aborts processing if a record has no
@@ -164,6 +165,24 @@ public boolean getIgnoreMissingId() {
         return ignoreMissingId;
     }
 
+    /**
+     * Controls whether the Record Leader should be emitted as a whole instead of
+     * extracting the bibliographic information in the record leader.
+     *
+     * @see <a href="http://www.loc.gov/marc/bibliographic/bdleader.html">MARC 21
+     * Standard: Record Leader</a>
+     *
+     * @param emitLeaderAsWhole
+     *             true if the leader should be emitted as a whole.
+     */
+    public void setEmitLeaderAsWhole(final boolean emitLeaderAsWhole) {
+        this.emitLeaderAsWhole = emitLeaderAsWhole;
+    }
+
+    public boolean getEmitLeaderAsWhole() {
+        return emitLeaderAsWhole;
+    }
+
     @Override
     public void process(final String obj) {
         if (obj.isEmpty()) {
@@ -207,9 +226,12 @@ private String tryGetRecordId(final Record record) {
     }
 
     private void emitLeader(final Record record) {
+        getReceiver().startEntity(Marc21EventNames.LEADER_ENTITY);
+        if (emitLeaderAsWhole){
+            getReceiver().literal(Marc21EventNames.LEADER_ENTITY, record.getLabel());
+        }else {
         final char[] implCodes = record.getImplCodes();
         final char[] systemChars = record.getSystemChars();
-        getReceiver().startEntity(Marc21EventNames.LEADER_ENTITY);
         getReceiver().literal(Marc21EventNames.RECORD_STATUS_LITERAL, String.valueOf(
                 record.getRecordStatus()));
         getReceiver().literal(Marc21EventNames.RECORD_TYPE_LITERAL, String.valueOf(
@@ -226,6 +248,7 @@ private void emitLeader(final Record record) {
                 systemChars[Marc21Constants.CATALOGING_FORM_INDEX]));
         getReceiver().literal(Marc21EventNames.MULTIPART_LEVEL_LITERAL, String.valueOf(
                 systemChars[Marc21Constants.MULTIPART_LEVEL_INDEX]));
+        }
         getReceiver().endEntity();
     }
 

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

@@ -38,6 +38,9 @@ public final class MarcXmlEncoder extends DefaultStreamPipe<ObjectReceiver<Strin
     private static final String SUBFIELD_OPEN_TEMPLATE = "<marc:subfield code=\"%s\">";
     private static final String SUBFIELD_CLOSE = "</marc:subfield>";
 
+    private static final String LEADER_OPEN_TEMPLATE = "<marc:leader>";
+    private static final String LEADER_CLOSE_TEMPLATE = "</marc:leader>";
+
     private static final String NEW_LINE = "\n";
     private static final String INDENT = "\t";
 
@@ -152,25 +155,27 @@ public void endEntity() {
     }
 
     @Override
-    public void literal(final String name, final String value)
-    {
-        if (currentEntity.equals(""))
-        {
+    public void literal(final String name, final String value) {
+        if (currentEntity.equals("")) {
             prettyPrintIndentation();
             writeRaw(String.format(CONTROLFIELD_OPEN_TEMPLATE, name));
             writeEscaped(value.trim());
             writeRaw(CONTROLFIELD_CLOSE);
             prettyPrintNewLine();
-        }
-        else if (!currentEntity.equals("leader"))
-        {
+        } else if (!currentEntity.equals("leader")) {
             prettyPrintIndentation();
             writeRaw(String.format(SUBFIELD_OPEN_TEMPLATE, name));
             writeEscaped(value.trim());
             writeRaw(SUBFIELD_CLOSE);
             prettyPrintNewLine();
+        } else {
+            if (name.equals(Marc21EventNames.LEADER_ENTITY)) {
+                prettyPrintIndentation();
+                writeRaw(LEADER_OPEN_TEMPLATE + value + LEADER_CLOSE_TEMPLATE);
+                prettyPrintNewLine();
+            }
         }
-        else {
+
     }
 
     @Override

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

@@ -111,4 +111,17 @@ public void createTwoRecordsInOneCollection() throws Exception {
 
         assertEquals(expected, actual);
     }
+
+    @Test
+    public void createAnRecordWithLeader() throws Exception {
+        encoder.startRecord("1");
+        encoder.startEntity("leader");
+        encoder.literal("leader", "dummy");
+        encoder.endEntity();
+        encoder.endRecord();
+        encoder.closeStream();
+        String expected = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><marc:collection xmlns:marc=\"http://www.loc.gov/MARC21/slim\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd\"><marc:record><marc:leader>dummy</marc:leader></marc:record></marc:collection>";
+        String actual = resultCollector.toString();
+        assertEquals(expected, actual);
+    }
 }