#27987 - add exceptions to WordlistLoader to missing file causes error instead of silently failing

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150256 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/lucene/analysis/de/GermanAnalyzer.java

@@ -62,6 +62,7 @@ import org.apache.lucene.analysis.standard.StandardTokenizer;
 
 import java.io.File;
 import java.io.Reader;
+import java.io.IOException;
 import java.util.HashSet;
 import java.util.Hashtable;
 import java.util.Set;
@@ -82,14 +83,14 @@ public class GermanAnalyzer extends Analyzer {
    */
   private String[] GERMAN_STOP_WORDS = {
     "einer", "eine", "eines", "einem", "einen",
-    "der", "die", "das", "dass", "daß",
+    "der", "die", "das", "dass", "da<EFBFBD>",
     "du", "er", "sie", "es",
     "was", "wer", "wie", "wir",
     "und", "oder", "ohne", "mit",
     "am", "im", "in", "aus", "auf",
     "ist", "sein", "war", "wird",
     "ihr", "ihre", "ihres",
-    "als", "für", "von", "mit",
+    "als", "f<EFBFBD>r", "von", "mit",
     "dich", "dir", "mich", "mir",
     "mein", "sein", "kein",
     "durch", "wegen", "wird"
@@ -129,7 +130,7 @@ public class GermanAnalyzer extends Analyzer {
   /**
    * Builds an analyzer with the given stop words.
    */
-  public GermanAnalyzer(File stopwords) {
+  public GermanAnalyzer(File stopwords) throws IOException {
     stopSet = new HashSet(WordlistLoader.getWordtable(stopwords).keySet());
   }
 
@@ -150,7 +151,7 @@ public class GermanAnalyzer extends Analyzer {
   /**
    * Builds an exclusionlist from the words contained in the given file.
    */
-  public void setStemExclusionTable(File exclusionlist) {
+  public void setStemExclusionTable(File exclusionlist) throws IOException {
     exclusionSet = new HashSet(WordlistLoader.getWordtable(exclusionlist).keySet());
   }
 

src/java/org/apache/lucene/analysis/de/WordlistLoader.java

@@ -62,20 +62,18 @@ import java.util.Hashtable;
 
 /**
  * Loads a text file and adds every line as an entry to a Hashtable. Every line
- * should contain only one word. If the file is not found or on any error, an
- * empty table is returned.
- *
- * @author    Gerhard Schwarz
- * @version   $Id$
+ * should contain only one word.
  *
+ * @author Gerhard Schwarz
+ * @version $Id$
  * @todo refactor to convert to Sets instead of Hashtable
  */
 public class WordlistLoader {
   /**
-   * @param path      Path to the wordlist
-   * @param wordfile  Name of the wordlist
+   * @param path     Path to the wordlist
+   * @param wordfile Name of the wordlist
    */
-  public static Hashtable getWordtable(String path, String wordfile) {
+  public static Hashtable getWordtable(String path, String wordfile) throws IOException {
     if (path == null || wordfile == null) {
       return new Hashtable();
     }
@@ -83,9 +81,9 @@ public class WordlistLoader {
   }
 
   /**
-   * @param wordfile  Complete path to the wordlist
+   * @param wordfile Complete path to the wordlist
    */
-  public static Hashtable getWordtable(String wordfile) {
+  public static Hashtable getWordtable(String wordfile) throws IOException {
     if (wordfile == null) {
       return new Hashtable();
     }
@@ -93,16 +91,19 @@ public class WordlistLoader {
   }
 
   /**
-   * @param wordfile  File containing the wordlist
+   * @param wordfile File containing the wordlist
    * @todo Create a Set version of this method
    */
-  public static Hashtable getWordtable(File wordfile) {
+  public static Hashtable getWordtable(File wordfile) throws IOException {
     if (wordfile == null) {
       return new Hashtable();
     }
     Hashtable result = null;
+    FileReader freader = null;
+    LineNumberReader lnr = null;
     try {
-      LineNumberReader lnr = new LineNumberReader(new FileReader(wordfile));
+      freader = new FileReader(wordfile);
+      lnr = new LineNumberReader(freader);
       String word = null;
       String[] stopwords = new String[100];
       int wordcount = 0;
@@ -116,10 +117,11 @@ public class WordlistLoader {
         stopwords[wordcount - 1] = word;
       }
       result = makeWordTable(stopwords, wordcount);
-    }
-// On error, use an empty table
-    catch (IOException e) {
-      result = new Hashtable();
+    } finally {
+      if (lnr != null)
+        lnr.close();
+      if (freader != null)
+        freader.close();
     }
     return result;
   }
@@ -127,8 +129,8 @@ public class WordlistLoader {
   /**
    * Builds the wordlist table.
    *
-   * @param words   Word that where read
-   * @param length  Amount of words that where read into <tt>words</tt>
+   * @param words  Word that where read
+   * @param length Amount of words that where read into <tt>words</tt>
    */
   private static Hashtable makeWordTable(String[] words, int length) {
     Hashtable table = new Hashtable(length);