fix allowed subfield IDs, add SRU hack for number of records, add MarcRecordIterator class

src/main/java/org/xbib/marc/Marc.java

@@ -1230,11 +1230,11 @@ public final class Marc {
             return this;
         }
 
-        public Iterator<MarcRecord> xmlRecordIterator() {
+        public MarcRecordIterator xmlRecordIterator() {
             return xmlRecordIterator(new MarcXchangeEventConsumer());
         }
 
-        public Iterator<MarcRecord> xmlRecordIterator(MarcXchangeEventConsumer consumer) {
+        public MarcRecordIterator xmlRecordIterator(MarcXchangeEventConsumer consumer) {
             XMLEventReader xmlEventReader;
             try {
                 xmlEventReader = XMLInputFactory.newFactory().createXMLEventReader(inputStream);
@@ -1256,7 +1256,12 @@ public final class Marc {
                 }
             }, Comparator.naturalOrder());
             consumer.setMarcListener(marcRecordAdapter);
-            return new Iterator<>() {
+            return new MarcRecordIterator() {
+                @Override
+                public long getTotalNumberOfRecords() {
+                    return consumer.getNumberOfRecords();
+                }
+
                 @Override
                 public boolean hasNext() {
                     try {

src/main/java/org/xbib/marc/MarcRecordIterator.java

@@ -0,0 +1,8 @@
+package org.xbib.marc;
+
+import java.util.Iterator;
+
+public interface MarcRecordIterator extends Iterator<MarcRecord> {
+
+    long getTotalNumberOfRecords();
+}

src/main/java/org/xbib/marc/StrictMarcFieldValidator.java

@@ -19,6 +19,9 @@ import java.util.Set;
 
 public class StrictMarcFieldValidator implements MarcFieldValidator {
 
+    /**
+     * See <a href="https://www.loc.gov/marc/specifications/specrecstruc.html#varifields">MARC variables in fields</a>.
+     */
     private static final Set<Character> ASCII_GRAPHICS = Set.of(
             '\u0020', '\u0021', '\u0022', '\u0023', '\u0024', '\u0025', '\u0026', '\'',
             '\u0028', '\u0029', '\u002A', '\u002B', '\u002C', '\u002D', '\u002E', '\u002F',
@@ -34,8 +37,6 @@ public class StrictMarcFieldValidator implements MarcFieldValidator {
             '\u007B', '\u007C', '\u007D', '\u007E'
     );
 
-    private static final char BLANK = ' ';
-
     private static final String BLANK_STRING = " ";
 
     private static final String BLANK_TAG = "   ";
@@ -82,11 +83,13 @@ public class StrictMarcFieldValidator implements MarcFieldValidator {
             // we do not allow an empty subfield id. Elasticsearch field names require a length > 0.
             if (id.isEmpty()) {
                 id = BLANK_STRING;
-            } else {
-                // We have inconsistent use of subfield id symbols as placeholders for a "blank space"
-                // and we need to fix it here for consistency.
-                id = id.replaceAll("[-#.^_]", BLANK_STRING);
             }
+            // we do not allow characters that are not in the graphics definition
+            if (id.length() == 1 && !ASCII_GRAPHICS.contains(id.charAt(0))) {
+                id = BLANK_STRING;
+            }
+            // sorry, but we must disallow . because of Elasticsearch.
+            id = id.replaceAll("\\.", BLANK_STRING);
         }
         return id;
     }

src/main/java/org/xbib/marc/xml/MarcXchangeEventConsumer.java

@@ -61,6 +61,8 @@ public class MarcXchangeEventConsumer implements XMLEventConsumer, MarcXchangeCo
 
     private boolean endRecordReached;
 
+    private long numberOfRecords;
+
     public MarcXchangeEventConsumer() {
         this.stack = new LinkedList<>();
         this.marcListeners = new HashMap<>();
@@ -70,6 +72,7 @@ public class MarcXchangeEventConsumer implements XMLEventConsumer, MarcXchangeCo
         this.validNamespaces = new HashSet<>();
         this.validNamespaces.addAll(Set.of(MARCXCHANGE_V1_NS_URI, MARCXCHANGE_V2_NS_URI, MARC21_SCHEMA_URI));
         this.endRecordReached = false;
+        this.numberOfRecords = -1L;
     }
 
     public MarcXchangeEventConsumer setMarcListener(String type, MarcListener listener) {
@@ -143,6 +146,7 @@ public class MarcXchangeEventConsumer implements XMLEventConsumer, MarcXchangeCo
     @Override
     public void add(XMLEvent event) throws XMLStreamException {
         if (event.isStartElement()) {
+            content.setLength(0);
             StartElement element = (StartElement) event;
             String uri = element.getName().getNamespaceURI();
             if (!validNamespaces.contains(uri)) {
@@ -193,7 +197,6 @@ public class MarcXchangeEventConsumer implements XMLEventConsumer, MarcXchangeCo
             if (thistype == null) {
                 thistype = this.type;
             }
-            content.setLength(0);
             switch (localName) {
                 case COLLECTION -> {
                     beginCollection();
@@ -220,11 +223,18 @@ public class MarcXchangeEventConsumer implements XMLEventConsumer, MarcXchangeCo
             }
         } else if (event.isEndElement()) {
             EndElement element = (EndElement) event;
-            String uri = element.getName().getNamespaceURI();
+            // hack for SRU numberOfRecords
-            if (!validNamespaces.contains(uri)) {
+            String localName = element.getName().getLocalPart();
+            if ("numberOfRecords".equals(localName)) {
+                try {
+                    this.numberOfRecords = Long.parseLong(content.toString());
+                } catch (NumberFormatException e) {
+                    // ignore
+                }
+            }
+            if (!validNamespaces.contains(element.getName().getNamespaceURI())) {
                 return;
             }
-            String localName = element.getName().getLocalPart();
             switch (localName) {
                 case COLLECTION -> {
                     endCollection();
@@ -285,6 +295,10 @@ public class MarcXchangeEventConsumer implements XMLEventConsumer, MarcXchangeCo
         endRecordReached = false;
     }
 
+    public long getNumberOfRecords() {
+        return numberOfRecords;
+    }
+
     private MarcField transformValue(MarcField field) {
         return marcValueTransformers != null ? marcValueTransformers.transformValue(field) : field;
     }

src/test/java/org/xbib/marc/MarcFieldTest.java

@@ -20,6 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import org.junit.jupiter.api.Test;
+import java.util.Set;
 import java.util.TreeSet;
 
 public class MarcFieldTest {
@@ -182,16 +183,6 @@ public class MarcFieldTest {
         assertFalse(marcField.isIndicatorValid());
     }
 
-    @Test
-    public void testInvalidSubfield() {
-        MarcField marcField = MarcField.builder()
-                .tag("100")
-                .indicator("0")
-                .subfield("\u007f", null)
-                .build();
-        assertFalse(marcField.areAllSubfieldsValid());
-    }
-
     // 901  =, 901  a=98502599, 901  d=0, 901  e=14, 901  =f, 901  =h]
     @Test
     public void testBeginEndFields() {
@@ -261,10 +252,40 @@ public class MarcFieldTest {
         assertTrue(marcField.isControl());
         assertEquals("001", marcField.getTag());
         assertEquals(" ", marcField.getIndicator());
-        assertEquals("123", marcField.getFirstSubfieldValue(" "));
+        assertEquals("123", marcField.getFirstSubfieldValue("_")); // _ is allowed!
         marcField = MarcField.builder().key("001", "\\.", "123").build();
         assertTrue(marcField.isControl());
         assertEquals("001", marcField.getTag());
         assertEquals("123", marcField.getValue());
     }
+
+    @Test
+    public void testMarcSubfieldIds() {
+        for (Character ch : ASCII_GRAPHICS) {
+            if (ch == '.') {
+                ch  = ' '; // special rule because of Elasticsearch
+            }
+            MarcField marcField = MarcField.builder()
+                    .tag("100")
+                    .indicator("  ")
+                    .subfield(Character.toString(ch), "Hello World " + ch)
+                    .build();
+            assertEquals("Hello World " + ch, marcField.getSubfield(Character.toString(ch)).getFirst().getValue());
+        }
+    }
+
+    private static final Set<Character> ASCII_GRAPHICS = Set.of(
+            '\u0020', '\u0021', '\u0022', '\u0023', '\u0024', '\u0025', '\u0026', '\'',
+            '\u0028', '\u0029', '\u002A', '\u002B', '\u002C', '\u002D', '\u002E', '\u002F',
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+            '\u003A', '\u003B', '\u003C', '\u003D', '\u003E', '\u003F', '\u0040',
+            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
+            'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
+            'U', 'V', 'W', 'X', 'Y', 'Z',
+            '\u005B', '\\', '\u005D', '\u005E', '\u005F', '\u0060',
+            'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
+            'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+            'u', 'v', 'w', 'x', 'y', 'z',
+            '\u007B', '\u007C', '\u007D', '\u007E'
+    );
 }

src/test/java/org/xbib/marc/xml/MarcEventConsumerTest.java

@@ -21,6 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 import org.junit.jupiter.api.Test;
 import org.xbib.marc.Marc;
 import org.xbib.marc.MarcRecord;
+import org.xbib.marc.MarcRecordIterator;
 import org.xmlunit.matchers.CompareMatcher;
 import java.io.InputStream;
 import java.io.StringWriter;
@@ -127,4 +128,23 @@ public class MarcEventConsumerTest {
         }
         assertEquals(1, count.get());
     }
+
+    @Test
+    public void testSRUXMLIterable() {
+        String s = "lvi.xml";
+        InputStream in = getClass().getResourceAsStream(s);
+        AtomicInteger count = new AtomicInteger();
+        MarcXchangeEventConsumer consumer = new MarcXchangeEventConsumer();
+        MarcRecordIterator iterator = Marc.builder()
+                .setInputStream(in)
+                .setCharset(StandardCharsets.UTF_8)
+                .xmlRecordIterator(consumer);
+        while (iterator.hasNext()) {
+            MarcRecord marcRecord = iterator.next();
+            logger.log(Level.INFO, marcRecord.toString());
+            count.incrementAndGet();
+        }
+        assertEquals(5, count.get());
+        assertEquals(5L, iterator.getTotalNumberOfRecords());
+    }
 }

src/test/resources/org/xbib/marc/xml/lvi.xml

@@ -0,0 +1,567 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<zs:searchRetrieveResponse xmlns:zs="http://www.loc.gov/zing/srw/"><zs:version>1.1</zs:version><zs:numberOfRecords>5</zs:numberOfRecords><zs:records><zs:record><zs:recordSchema/><zs:recordPacking>xml</zs:recordPacking><zs:recordData><record xmlns="http://www.loc.gov/MARC21/slim" format="MARC21" type="Bibliographic">
+    <leader>00000nam a2200373 cb4500</leader>
+    <controlfield tag="001">HT014020783</controlfield>
+    <controlfield tag="003">DE-605</controlfield>
+    <controlfield tag="005">00000000000000.0</controlfield>
+    <controlfield tag="007">t</controlfield>
+    <controlfield tag="008">040517s1982    gw ad||  |||| 00||| ger d</controlfield>
+    <datafield tag="020" ind1=" " ind2=" ">
+      <subfield code="a">3506374419</subfield>
+      <subfield code="9">3-506-37441-9</subfield>
+    </datafield>
+    <datafield tag="024" ind1="8" ind2=" ">
+      <subfield code="a">Best.-Nr. 37441</subfield>
+    </datafield>
+    <datafield tag="035" ind1=" " ind2=" ">
+      <subfield code="a">(OCoLC)74557806</subfield>
+    </datafield>
+    <datafield tag="035" ind1=" " ind2=" ">
+      <subfield code="a">(DE-599)HBZHT014020783</subfield>
+    </datafield>
+    <datafield tag="040" ind1=" " ind2=" ">
+      <subfield code="a">DE-605</subfield>
+      <subfield code="b">ger</subfield>
+      <subfield code="e">rakwb</subfield>
+    </datafield>
+    <datafield tag="041" ind1="0" ind2=" ">
+      <subfield code="a">ger</subfield>
+    </datafield>
+    <datafield tag="044" ind1=" " ind2=" ">
+      <subfield code="a">gw</subfield>
+      <subfield code="c">DE</subfield>
+    </datafield>
+    <datafield tag="245" ind1="0" ind2="0">
+      <subfield code="a">Informatik</subfield>
+      <subfield code="c">Manfred Prante ; Wolfgang Tofahrn</subfield>
+    </datafield>
+    <datafield tag="246" ind1="1" ind2="0">
+      <subfield code="a">Schulbuch Schöningh</subfield>
+    </datafield>
+    <datafield tag="250" ind1=" " ind2=" ">
+      <subfield code="a">[Nachdr.]</subfield>
+    </datafield>
+    <datafield tag="260" ind1=" " ind2=" ">
+      <subfield code="a">Paderborn</subfield>
+      <subfield code="b">Schöningh</subfield>
+      <subfield code="c">[19]82</subfield>
+    </datafield>
+    <datafield tag="300" ind1=" " ind2=" ">
+      <subfield code="a">240 S.</subfield>
+      <subfield code="b">Ill., graph. Darst.</subfield>
+    </datafield>
+    <datafield tag="385" ind1=" " ind2=" ">
+      <subfield code="0">(DE-588)4053369-4</subfield>
+      <subfield code="a">Schüler</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="490" ind1="1" ind2=" ">
+      <subfield code="a">Schöninghbuch</subfield>
+      <subfield code="v">37441</subfield>
+    </datafield>
+    <datafield tag="650" ind1="0" ind2="7">
+      <subfield code="a">Informatik</subfield>
+      <subfield code="0">(DE-588)4026894-9</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="0">(DE-588)4053458-3</subfield>
+      <subfield code="a">Schulbuch</subfield>
+      <subfield code="2">gnd-content</subfield>
+    </datafield>
+    <datafield tag="689" ind1="0" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="0" ind2="0">
+      <subfield code="a">Informatik</subfield>
+      <subfield code="0">(DE-588)4026894-9</subfield>
+      <subfield code="D">s</subfield>
+    </datafield>
+    <datafield tag="700" ind1="1" ind2=" ">
+      <subfield code="a">Prante, Manfred</subfield>
+      <subfield code="e">Sonstige</subfield>
+      <subfield code="4">oth</subfield>
+    </datafield>
+    <datafield tag="700" ind1="1" ind2=" ">
+      <subfield code="a">Tofahrn, Wolfgang</subfield>
+      <subfield code="e">Sonstige</subfield>
+      <subfield code="4">oth</subfield>
+    </datafield>
+    <datafield tag="830" ind1=" " ind2="0">
+      <subfield code="a">Schöninghbuch</subfield>
+      <subfield code="v">37441</subfield>
+      <subfield code="w">(DE-605)HT003053914</subfield>
+    </datafield>
+    <datafield tag="924" ind1="0" ind2=" ">
+      <subfield code="9">466</subfield>
+      <subfield code="b">DE-466</subfield>
+      <subfield code="c">NRW</subfield>
+      <subfield code="d">c</subfield>
+      <subfield code="f">keine Angabe</subfield>
+      <subfield code="g">TSD4165</subfield>
+    </datafield>
+    <datafield tag="924" ind1="0" ind2=" ">
+      <subfield code="9">5</subfield>
+      <subfield code="b">DE-5</subfield>
+      <subfield code="c">NRW</subfield>
+      <subfield code="d">d</subfield>
+      <subfield code="f">keine ILL</subfield>
+      <subfield code="g">PRA</subfield>
+      <subfield code="h">DE-5-14</subfield>
+      <subfield code="h">00070015</subfield>
+    </datafield>
+    <datafield tag="924" ind1="0" ind2=" ">
+      <subfield code="9">466</subfield>
+      <subfield code="b">DE-466</subfield>
+      <subfield code="c">NRW</subfield>
+      <subfield code="f">30</subfield>
+      <subfield code="h">40</subfield>
+      <subfield code="i">TSD4165</subfield>
+    </datafield>
+    <datafield tag="960" ind1=" " ind2="0">
+      <subfield code="a">(DE-605)HBZ01-012633043</subfield>
+    </datafield>
+  </record></zs:recordData><zs:recordPosition>1</zs:recordPosition></zs:record><zs:record><zs:recordSchema/><zs:recordPacking>xml</zs:recordPacking><zs:recordData><record xmlns="http://www.loc.gov/MARC21/slim" format="MARC21" type="Bibliographic">
+    <leader>00000nam a2200541 c 4500</leader>
+    <controlfield tag="001">BT000072798</controlfield>
+    <controlfield tag="003">DE-605</controlfield>
+    <controlfield tag="005">19960816        </controlfield>
+    <controlfield tag="007">t</controlfield>
+    <controlfield tag="008">960816s1987       ab||  |||| 00||| und d</controlfield>
+    <datafield tag="020" ind1=" " ind2=" ">
+      <subfield code="a">3883395900</subfield>
+      <subfield code="9">3-88339-590-0</subfield>
+    </datafield>
+    <datafield tag="035" ind1=" " ind2=" ">
+      <subfield code="a">(OCoLC)1069846308</subfield>
+    </datafield>
+    <datafield tag="035" ind1=" " ind2=" ">
+      <subfield code="a">(DE-599)HBZBT000072798</subfield>
+    </datafield>
+    <datafield tag="040" ind1=" " ind2=" ">
+      <subfield code="a">DE-605</subfield>
+      <subfield code="b">ger</subfield>
+      <subfield code="e">rakwb</subfield>
+    </datafield>
+    <datafield tag="041" ind1=" " ind2=" ">
+      <subfield code="a">und</subfield>
+    </datafield>
+    <datafield tag="084" ind1=" " ind2=" ">
+      <subfield code="a">Grafschaft Mark</subfield>
+      <subfield code="2">nwbib</subfield>
+    </datafield>
+    <datafield tag="084" ind1=" " ind2=" ">
+      <subfield code="a">Bergbaugeschichte</subfield>
+      <subfield code="2">nwbib</subfield>
+    </datafield>
+    <datafield tag="100" ind1="1" ind2=" ">
+      <subfield code="a">Bader, Karl Heinz</subfield>
+      <subfield code="e">Verfasser</subfield>
+      <subfield code="4">aut</subfield>
+    </datafield>
+    <datafield tag="245" ind1="0" ind2="0">
+      <subfield code="a">˜250œ [Zweihundertfünfzig] Jahre märkischer Steinkohlenbergbau</subfield>
+      <subfield code="b">e. Beitr. zur Geschichte d. Bergbaus, d. Bergverwaltung u. d. Stadt Bochum</subfield>
+      <subfield code="c">unter Mitarb. von Manfred Prante.</subfield>
+    </datafield>
+    <datafield tag="246" ind1="1" ind2=" ">
+      <subfield code="a">250 Jahre märkischer Steinkohlenbergbau</subfield>
+    </datafield>
+    <datafield tag="260" ind1=" " ind2=" ">
+      <subfield code="a">Bochum</subfield>
+      <subfield code="b">Studienverl. Brockmeyer</subfield>
+      <subfield code="c">1987</subfield>
+    </datafield>
+    <datafield tag="300" ind1=" " ind2=" ">
+      <subfield code="a">232 S.</subfield>
+      <subfield code="b">Ill., Kt.</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Bochum, Bergbaugeschichte</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Mark (Grafschaft), Bergbaugeschichte</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Steinkohlenbergbau, Bochum</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Bergbaugeschichte, Bochum</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Steinkohlenbergbau, Mark (Grafschaft)</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Bochum, Steinkohlenbergbau</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="655" ind1=" " ind2="7">
+      <subfield code="a">Mark (Grafschaft), Steinkohlenbergbau</subfield>
+      <subfield code="2">gnd</subfield>
+    </datafield>
+    <datafield tag="689" ind1="0" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="0" ind2="0">
+      <subfield code="a">Mark (Grafschaft), Bergbaugeschichte</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="689" ind1="1" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="1" ind2="0">
+      <subfield code="a">Bochum, Bergbaugeschichte</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="689" ind1="2" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="2" ind2="0">
+      <subfield code="a">Mark (Grafschaft), Steinkohlenbergbau</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="689" ind1="3" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="3" ind2="0">
+      <subfield code="a">Bochum, Steinkohlenbergbau</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="689" ind1="4" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="4" ind2="0">
+      <subfield code="a">Bergbaugeschichte, Bochum</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="689" ind1="5" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="5" ind2="0">
+      <subfield code="a">Steinkohlenbergbau, Mark (Grafschaft)</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="689" ind1="6" ind2=" ">
+      <subfield code="5">DE-605</subfield>
+    </datafield>
+    <datafield tag="689" ind1="6" ind2="0">
+      <subfield code="a">Steinkohlenbergbau, Bochum</subfield>
+      <subfield code="A"/>
+    </datafield>
+    <datafield tag="700" ind1="1" ind2=" ">
+      <subfield code="a">Röttger, Karl</subfield>
+      <subfield code="e">Verfasser</subfield>
+      <subfield code="4">aut</subfield>
+    </datafield>
+    <datafield tag="700" ind1="1" ind2=" ">
+      <subfield code="a">Prante, Manfred</subfield>
+      <subfield code="e">Sonstige</subfield>
+      <subfield code="4">oth</subfield>
+    </datafield>
+    <datafield tag="924" ind1="0" ind2=" ">
+      <subfield code="9">Sol 1</subfield>
+      <subfield code="b">DE-Sol1</subfield>
+      <subfield code="c">NRW</subfield>
+      <subfield code="d">d</subfield>
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