feat: extend shapefile writer to create .cpg file

Create .cpg file/files when one/more .shp files are created.
The .cpg file contain only the encoding used to write the shapefile.

io/plugins/eu.esdihumboldt.hale.io.shp/src/eu/esdihumboldt/hale/io/shp/ShapefileConstants.java

@@ -81,6 +81,12 @@ public interface ShapefileConstants {
 	 * Constant for the shape file extension.
 	 */
 	public static final String SHP_EXTENSION = ".shp";
+
+	/**
+	 * Constant for the CPG file extension.
+	 */
+	public static final String CPG_EXTENSION = ".cpg";
+
 	/**
 	 * Constant for underscore.
 	 */

io/plugins/eu.esdihumboldt.hale.io.shp/src/eu/esdihumboldt/hale/io/shp/writer/ShapefileInstanceWriter.java

@@ -16,6 +16,7 @@
 package eu.esdihumboldt.hale.io.shp.writer;
 
 import java.io.File;
+import java.io.FileWriter;
 import java.io.IOException;
 import java.io.Serializable;
 import java.net.URI;
@@ -122,6 +123,11 @@ protected IOReport execute(ProgressIndicator progress, IOReporter reporter)
 				setTarget(new MultiLocationOutputSupplier(uris));
 			}
 
+			for (String f : filesWritten) {
+				String cpgFileName = filePath + "/" + f + ShapefileConstants.CPG_EXTENSION;
+				writeCodePageFile(cpgFileName);
+			}
+
 			reporter.setSuccess(true);
 		} catch (Exception e) {
 			reporter.error(new IOMessageImpl(e.getMessage(), e));
@@ -472,6 +478,8 @@ private Map<String, Map<String, ShapefileDataStore>> createSchema(URI location,
 	 * - filename_geometryType.shp if multiple geometries.<br>
 	 * - filename.shp single schema and geom.
 	 * 
+	 * Create the CPG file starting from the Shapefile names
+	 * 
 	 * @param location file location.
 	 * @param numberOfSchemas number of schemas.
 	 * @param schemaEntry current schema in process.
@@ -724,4 +732,30 @@ private List<String> writeToFile(
 		return filesWritten;
 	}
 
+	/**
+	 * 
+	 * @param filePath Path of the file to be written with just one line of the
+	 *            encoding
+	 * @return File that has been created filled with the text
+	 * @throws IOException exception in any.
+	 */
+	public File writeCodePageFile(String filePath) throws IOException {
+		File file = new File(filePath);
+		FileWriter fr = new FileWriter(file);
+		try {
+			fr.write(getCharset() != null ? getCharset().toString()
+					: getDefaultCharset().toString());
+		} catch (IOException e) {
+			throw e;
+		} finally {
+			try {
+				fr.close();
+			} catch (IOException e) {
+				throw new IOException("An error occurred while creating/writing the file: "
+						+ filePath + " " + e.getMessage());
+			}
+		}
+		return file;
+	}
+
 }