BibTeX support

git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@223 f0f2a975-2e09-46c8-9428-3b39399b9f3c

source/java/org/openoffice/da/comp/writer2latex/BibTeXReader.java

@@ -0,0 +1,141 @@
+/************************************************************************
+ *
+ *  BibTeXReader.java
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *  Copyright: 2002-2014 by Henrik Just
+ *
+ *  All Rights Reserved.
+ * 
+ *  Version 1.6 (2014-11-24) 
+ *
+ */
+
+package org.openoffice.da.comp.writer2latex;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.jbibtex.BibTeXDatabase;
+import org.jbibtex.BibTeXEntry;
+import org.jbibtex.BibTeXParser;
+import org.jbibtex.BibTeXString;
+import org.jbibtex.Key;
+import org.jbibtex.LaTeXParser;
+import org.jbibtex.LaTeXPrinter;
+import org.jbibtex.ParseException;
+import org.jbibtex.Value;
+
+import writer2latex.bibtex.BibTeXEntryMap;
+import writer2latex.office.BibMark;
+import writer2latex.office.BibMark.EntryType;
+
+/**
+ * The class reads the contents of a BibTeX file and makes it available as a map
+ * of ODF <code>BibMark</code> objects
+ */
+public class BibTeXReader {
+
+	private Map<String, BibMark> entries;
+
+	/**
+	 * Construct a new <code>BibTeXReader</code> based on a file
+	 * 
+	 * @param file the file to read
+	 * @throws IOException if any error occurs reading the file
+	 * @throws ParseException if any error occurs interpreting the contents of the file
+	 */
+	public BibTeXReader(File file) throws IOException, ParseException {
+		BibTeXDatabase database = parseBibTeX(file);
+		readEntries(database);
+	}
+	
+	/** Get the entries of this BibTeX file
+	 * 
+	 * @return the entries
+	 */
+	public Map<String, BibMark> getEntries() {
+		return entries;
+	}
+
+	private static BibTeXDatabase parseBibTeX(File file) throws IOException, ParseException {
+		Reader reader = new FileReader(file);
+		try {
+			BibTeXParser parser = new BibTeXParser() {
+				@Override
+				public void checkStringResolution(Key key, BibTeXString string) {
+					if (string == null) {
+						System.err.println("Unresolved string: \"" + key.getValue() + "\"");
+					}
+				}
+
+				@Override
+				public void checkCrossReferenceResolution(Key key,
+						BibTeXEntry entry) {
+					if (entry == null) {
+						System.err.println("Unresolved cross-reference: \""	+ key.getValue() + "\"");
+					}
+				}
+			};
+			return parser.parse(reader);
+		} finally {
+			reader.close();
+		}
+	}
+
+	private void readEntries(BibTeXDatabase database) throws IOException {
+		entries = new HashMap<String, BibMark>();
+		Map<Key, BibTeXEntry> entryMap = database.getEntries();
+
+		Collection<BibTeXEntry> bibentries = entryMap.values();
+		for (BibTeXEntry bibentry : bibentries) {
+			String sKey = bibentry.getKey().toString();
+			String sType = bibentry.getType().toString();
+			BibMark entry = new BibMark(sKey,sType);
+			entries.put(sKey, entry);
+			
+			Map<Key,Value> fields = bibentry.getFields();
+			for (Key key : fields.keySet()) {
+				Value value = fields.get(key);
+				EntryType entryType = BibTeXEntryMap.getEntryType(key.getValue());
+				if (entryType!=null) {
+					entry.setField(entryType, parseLaTeX(value.toUserString()));
+				}
+			}
+		}	
+	}
+
+	private static String parseLaTeX(String string) throws IOException {
+		Reader reader = new StringReader(string);
+		try {
+			LaTeXParser parser = new LaTeXParser();
+			LaTeXPrinter printer = new LaTeXPrinter();
+			return printer.print(parser.parse(reader));
+		} catch (ParseException e) {
+			// If parsing fails, return the original string
+			return string;
+		} finally {
+			reader.close();
+		}
+	}
+
+}