Translator refactoring :

- deleted useless new StringBuilder allocation
- use of a new reusable FileNameFilter
- added javadoc

source/net/yacy/data/Translator.java

@@ -52,6 +52,7 @@ import net.yacy.kelondro.util.FileUtils;
 import net.yacy.kelondro.util.Formatter;
 import net.yacy.search.SwitchboardConstants;
 import net.yacy.server.serverSwitch;
+import net.yacy.utils.translation.SourceFileFilter;
 
 import java.util.*;
 
@@ -126,6 +127,13 @@ public class Translator {
         return translateFile(sourceFile, destFile, loadTranslationsLists(translationFile).get(sourceFile.getName()));
     }
 
+    /**
+     * Translate sourceFile to destFile using translationList.
+     * @param sourceFile file to translate
+     * @param destFile file to write
+     * @param translationList map of translations
+     * @return true when destFile was sucessfully written, false otherwise
+     */
     public static boolean translateFile(final File sourceFile, final File destFile, final Map<String, String> translationList){
 
         StringBuilder content = new StringBuilder();
@@ -147,11 +155,11 @@ public class Translator {
             }
         }
 
-        content = new StringBuilder(translate(content.toString(), translationList));
+        String processedContent = translate(content.toString(), translationList);
         BufferedWriter bw = null;
         try{
             bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(destFile),"UTF-8"));
-            bw.write(content.toString());
+            bw.write(processedContent);
             bw.close();
         }catch(final IOException e){
             return false;
@@ -172,19 +180,10 @@ public class Translator {
 
     public static boolean translateFiles(final File sourceDir, final File destDir, final File baseDir, final Map<String, Map<String, String>> translationLists, final String extensions){
         destDir.mkdirs();
-        final File[] sourceFiles = sourceDir.listFiles();
         final List<String> exts = ListManager.string2vector(extensions);
-        boolean rightExtension;
+        final File[] sourceFiles = sourceDir.listFiles(new SourceFileFilter(exts));
         String relativePath;
         for (final File sourceFile : sourceFiles) {
-             rightExtension=false;
-             for (final String ext : exts) {
-                 if (sourceFile.getName().endsWith(ext)) {
-                     rightExtension=true;
-                     break;
-                 }
-             }
-            if (rightExtension) {
             try {
                 relativePath=sourceFile.getAbsolutePath().substring(baseDir.getAbsolutePath().length()+1); //+1 to get the "/"
                 relativePath = relativePath.replace(File.separatorChar, '/');
@@ -205,7 +204,6 @@ public class Translator {
                     //serverLog.logInfo("TRANSLATOR", "No translation for file: "+relativePath);
             }
         }
-        }
         return true;
     }
 

source/net/yacy/utils/translation/SourceFileFilter.java

@@ -0,0 +1,83 @@
+// SourceFileFilter.java
+// -------------------------------------
+// part of YACY
+// (C) by Michael Peter Christen; mc@yacy.net
+// first published on http://www.anomic.de
+// Frankfurt, Germany, 2004
+//
+// $LastChangedDate$
+// $LastChangedRevision$
+// $LastChangedBy$
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+package net.yacy.utils.translation;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * File filter for source files to translate
+ * 
+ * @author luc
+ * 
+ */
+public class SourceFileFilter implements FilenameFilter {
+
+	/** Extensions required to pass filter */
+	private List<String> extensions;
+
+	/**
+	 * Contructor with extensions
+	 * 
+	 * @param extensions
+	 *            extensions required. When this list is null or empty, filter
+	 *            let pass all files.
+	 */
+	public SourceFileFilter(List<String> extensions) {
+		if (extensions == null) {
+			this.extensions = new ArrayList<>();
+		} else {
+			this.extensions = new ArrayList<>(extensions);
+		}
+	}
+
+	/**
+	 * @param file
+	 *            file to check
+	 * @return true when file name ends with one of the extensions list or
+	 *         extensions list is empty
+	 */
+	@Override
+	public boolean accept(File dir, String name) {
+		boolean accepted = false;
+		if (name != null) {
+			if (extensions.size() == 0) {
+				accepted = true;
+			} else {
+				for (String ext : extensions) {
+					if (name.endsWith(ext)) {
+						accepted = true;
+						break;
+					}
+				}
+			}
+		}
+		return accepted;
+	}
+
+}