Resolves #973 Add DOI field for English version of MS Office 2007 XML

src/main/java/net/sf/jabref/exporter/MSBibExportFormat.java

@@ -49,27 +49,24 @@ public void performExport(final BibDatabaseContext databaseContext, final String
         Objects.requireNonNull(databaseContext);
         Objects.requireNonNull(entries);
 
-        if (entries.isEmpty()) { // Only export if entries exist
+        if (entries.isEmpty()) {
             return;
         }
-        // forcing to use UTF8 output format for some problems with
-        // xml export in other encodings
-        SaveSession ss = new SaveSession(StandardCharsets.UTF_8, false);
-        MSBibDatabase md = new MSBibDatabase(databaseContext.getDatabase(), entries);
-        try (VerifyingWriter ps = ss.getWriter()) {
-
-        // PS: DOES NOT SUPPORT EXPORTING ONLY A SET OF ENTRIES
+        // forcing to use UTF8 output format for some problems with xml export in other encodings
+        SaveSession session = new SaveSession(StandardCharsets.UTF_8, false);
+        MSBibDatabase msBibDatabase = new MSBibDatabase(databaseContext.getDatabase(), entries);
 
+        try (VerifyingWriter ps = session.getWriter()) {
             try {
-                DOMSource source = new DOMSource(md.getDOMrepresentation());
+                DOMSource source = new DOMSource(msBibDatabase.getDOMrepresentation());
                 StreamResult result = new StreamResult(ps);
                 Transformer trans = TransformerFactory.newInstance().newTransformer();
                 trans.setOutputProperty(OutputKeys.INDENT, "yes");
                 trans.transform(source, result);
             } catch (TransformerException | IllegalArgumentException | TransformerFactoryConfigurationError e) {
                 throw new Error(e);
             }
-            finalizeSaveSession(ss, new File(file));
+            finalizeSaveSession(session, new File(file));
         } catch (SaveException | IOException ex) {
             throw new IOException(ex.getMessage());
         }

src/main/java/net/sf/jabref/logic/msbib/MSBibEntry.java

@@ -108,6 +108,7 @@ class MSBibEntry {
     private String thesisType;
     private String internetSiteTitle;
     private String dateAccessed;
+    private String doi;
     private String url;
     private String productionCompany;
     private String publicationTitle;
@@ -267,6 +268,7 @@ private void populateFromXml(Element entry, String bcol) {
             dateAccessed = null;
         }
 
+        doi = getFromXml(bcol + "DOI", entry);
         url = getFromXml(bcol + "URL", entry);
         productionCompany = getFromXml(bcol + "ProductionCompany", entry);
 
@@ -434,8 +436,11 @@ private void populateFromBibtex(BibEntry bibtex) {
         if (bibtex.hasField(MSBIB + "accessed")) {
             dateAccessed = bibtex.getField(MSBIB + "accessed");
         }
+        if (bibtex.hasField("doi")) {
+            doi = bibtex.getField("doi");
+        }
         if (bibtex.hasField("url")) {
-            url = bibtex.getField("url"); /* SM: 2010.10: lower case */
+            url = bibtex.getField("url");
         }
         if (bibtex.hasField(MSBIB + "productioncompany")) {
             productionCompany = bibtex.getField(MSBIB + "productioncompany");
@@ -539,14 +544,12 @@ private void populateFromBibtex(BibEntry bibtex) {
     // http://www.microsoft.com/globaldev/reference/lcid-all.mspx
     private int getLCID(String language) {
         // TODO: add language to LCID mapping
-
         return 0;
     }
 
     // http://www.microsoft.com/globaldev/reference/lcid-all.mspx
     private String getLanguage(int LCID) {
         // TODO: add language to LCID mapping
-
         return "english";
     }
 
@@ -797,6 +800,7 @@ public Element getDOMrepresentation(Document document) {
         /* SM 2010.10 added month export */
         addField(document, msbibEntry, "Month", month);
 
+        addField(document, msbibEntry, "DOI", doi);
         addField(document, msbibEntry, "URL", url);
         addField(document, msbibEntry, "ProductionCompany", productionCompany);
         addField(document, msbibEntry, "PublicationTitle", publicationTitle);
@@ -1007,6 +1011,9 @@ public BibEntry getBibtexRepresentation() {
         if (dateAccessed != null) {
             hm.put(MSBIB + "accessed", dateAccessed);
         }
+        if (doi != null) {
+            hm.put("doi", doi);
+        }
         if (url != null) {
             hm.put("url", url);
         }

src/test/resources/net/sf/jabref/exporter/MsBibExportFormatTest2.bib

@@ -1,14 +1,15 @@
 @phdthesis{2002,
   title     = {Agile Entwicklung Web-basierter Systeme},
   year      = {2002},
-  type = {type},
+  type      = {type},
   number    = {3},
-  address = {a},
+  address   = {a},
   journal   = {Wirtschaftsinformatik},
   keywords  = {software development processes; agile software development environments; time-to-market; Extreme Programming; Crystal methods family; Adaptive Software Development},
   language  = {english},
   pages     = {237--248},
   publisher = {Gabler Verlag},
+  doi       = {10.1007/BF03250842},
   url       = {http://dx.doi.org/10.1007/BF03250842},
   volume    = {44},
 }

src/test/resources/net/sf/jabref/exporter/MsBibExportFormatTest2.xml

@@ -10,11 +10,13 @@
 <b:Author/>
 <b:Pages>237-248</b:Pages>
 <b:Volume>44</b:Volume>
+<b:StandardNumber> DOI: 10.1007/BF03250842</b:StandardNumber>
 <b:Publisher>Gabler Verlag</b:Publisher>
 <b:City>a</b:City>
 <b:JournalName>Wirtschaftsinformatik</b:JournalName>
 <b:Issue>3</b:Issue>
 <b:ThesisType>type</b:ThesisType>
+<b:DOI>10.1007/BF03250842</b:DOI>
 <b:URL>http://dx.doi.org/10.1007/BF03250842</b:URL>
 <b:BIBTEX_KeyWords>software development processes; agile software development environments; time-to-market; Extreme Programming; Crystal methods family; Adaptive Software Development</b:BIBTEX_KeyWords>
 </b:Source>

src/test/resources/net/sf/jabref/exporter/MsBibExportFormatTest4.xml

@@ -14,6 +14,7 @@
 <b:Publisher>Gabler Verlag</b:Publisher>
 <b:JournalName>Wirtschaftsinformatik</b:JournalName>
 <b:Issue>3</b:Issue>
+<b:DOI>10.1000/182</b:DOI>
 <b:URL>http://dx.doi.org/10.1007/BF03250842</b:URL>
 <b:BIBTEX_KeyWords>software development processes; agile software development environments; time-to-market; Extreme Programming; Crystal methods family; Adaptive Software Development</b:BIBTEX_KeyWords>
 </b:Source>