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src/main/java/writer2latex/rdf/Metadata.java

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+package writer2latex.rdf;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import com.opencsv.CSVReader;
+import com.opencsv.CSVReaderHeaderAware;
+import com.opencsv.exceptions.CsvValidationException;
+
+public class Metadata {
+	private static final String SUBTITLE = "subtitle";
+	private static final String FILENAME = "Filename";
+	private static final String SECTION = "Section";
+	private HashMap<String, HashMap<String, Set<String>>> sectionsMetadata;
+
+	public Metadata() {
+		sectionsMetadata = new HashMap<String, HashMap<String,Set<String>>>();
+	}
+
+	public void read(String metadataFilePath) {
+		File file = new File(metadataFilePath);
+		if (!file.exists()) {
+			return;
+		}
+	  readCSVFile(metadataFilePath);
+	}
+
+	private void readCSVFile(String filePath) {
+		Map<String, String> lineMap;
+		CSVReaderHeaderAware csvReader = null;
+  	int i = 0;
+		try {		
+	  	FileReader reader = new FileReader(filePath);
+			csvReader = new CSVReaderHeaderAware(reader);
+			while (i >= 0) {
+	  		lineMap = csvReader.readMap();
+	  		if (lineMap != null) {
+	  			processCSVLine(lineMap);
+	  		} else {
+	  			break;
+	  		}
+	  		i++;
+	  	} 
+			
+		} catch (CsvValidationException e) {
+			System.out.println("CSV Validation failed. CSV file is broken");
+			e.printStackTrace();
+		} catch (IOException e) {
+			System.out.println("I/O Exception happened. Oops.");
+			System.out.println(i);
+			e.printStackTrace();
+		} finally {
+			try {
+				csvReader.close();
+			} catch (IOException e) {
+				System.out.println("I/O Exception happened. Sorry.");
+				e.printStackTrace();
+			}
+		}
+	}
+
+	private void processCSVLine(Map<String, String> lineMap) {
+		Set<String> keys = lineMap.keySet();
+		if (!keys.contains(SECTION)) {
+			processDocumentMetadata(lineMap);
+		} else {
+			String section = lineMap.get(SECTION);
+			processSectionMetadata(lineMap,section);
+		}
+	}
+
+	private void processDocumentMetadata(Map<String, String> lineMap) {
+		processSectionMetadata(lineMap, "");
+	}
+
+	private void processSectionMetadata(Map<String, String> lineMap, String sectionNum) {
+		HashMap<String, Set<String>> sectionMetadata = getSectionMetadataContainer(sectionNum);
+		Set<String> names = lineMap.keySet();
+		for (String name : names) {
+			Set<String> values = getValueSet(sectionMetadata,name.trim());
+			String curValue = lineMap.get(name);
+			if (!curValue.trim().isEmpty()) {
+				values.add(curValue.trim());	
+			}
+		}
+	}
+
+	private Set<String> getValueSet(HashMap<String, Set<String>> sectionMetadata, String name) {
+		if (!sectionMetadata.containsKey(name)) {
+			Set<String> values = new HashSet<String>();
+			sectionMetadata.put(name, values);
+		}
+		return sectionMetadata.get(name);
+	}
+
+	private HashMap<String, Set<String>> getSectionMetadataContainer(String sectionNum) {
+		if (!sectionsMetadata.containsKey(sectionNum)) {
+			HashMap<String,Set<String>> sectionMetadata = new HashMap<String, Set<String>>();
+			sectionsMetadata.putIfAbsent(sectionNum, sectionMetadata);
+		}
+		return sectionsMetadata.get(sectionNum);
+	}
+
+	public void apply(DocumentPart part) {
+		String sequenceNumber = part.getSequentionalNumber();
+		if (sequenceNumber == null) {
+			return;
+		}
+		//root part doesn't have number in csv
+		if (sequenceNumber.equals("0")) {
+			sequenceNumber = "";
+		}
+		HashMap<String, Set<String>> metadata = sectionsMetadata.get(sequenceNumber);
+		if (metadata != null) {
+			part.setMetadata(metadata);
+		}
+	}	
+
+}