Index: IndexReader.java
===================================================================
RCS file: /home/cvspublic/jakarta-lucene/src/java/org/apache/lucene/index/IndexReader.java,v
retrieving revision 1.9
diff -c -r1.9 IndexReader.java
*** IndexReader.java	15 Feb 2002 18:59:42 -0000	1.9
--- IndexReader.java	13 May 2002 03:36:13 -0000
***************
*** 160,165 ****
--- 160,171 ----
      return directory.fileExists("segments");
    }
  
+     /** Returns the names of all searchable fields in the index
+         @throws IOException if there is a problem accessing the index.
+     */
+     abstract public String[] getIndexedFieldNames() throws IOException;
+ 
+ 
    /** Returns the number of documents in this index. */
    abstract public int numDocs();
  
***************
*** 331,334 ****
  	directory.deleteFile("write.lock");
  	directory.deleteFile("commit.lock");
      }
! }
--- 337,341 ----
  	directory.deleteFile("write.lock");
  	directory.deleteFile("commit.lock");
      }
!     
!   }
Index: SegmentReader.java
===================================================================
RCS file: /home/cvspublic/jakarta-lucene/src/java/org/apache/lucene/index/SegmentReader.java,v
retrieving revision 1.4
diff -c -r1.4 SegmentReader.java
*** SegmentReader.java	8 Feb 2002 19:39:42 -0000	1.4
--- SegmentReader.java	13 May 2002 03:36:15 -0000
***************
*** 220,225 ****
--- 220,236 ----
      return fieldsReader.size();
    }
  
+   public String[] getIndexedFieldNames() {
+      //I think lucene is jdk1.1 compliant
+      //check if we get multiple field info's of same names...
+      Vector v = new Vector();
+      for (int i = 0; i < this.fieldInfos.size(); i++) {
+       FieldInfo fi = fieldInfos.fieldInfo(i);
+       if (fi.isIndexed) v.add(fi.name);
+     }
+     return (String[]) v.toArray(new String[v.size()]);
+   }
+ 
    public final byte[] norms(String field) throws IOException {
      Norm norm = (Norm)norms.get(field);
      if (norm == null)
Index: SegmentsReader.java
===================================================================
RCS file: /home/cvspublic/jakarta-lucene/src/java/org/apache/lucene/index/SegmentsReader.java,v
retrieving revision 1.5
diff -c -r1.5 SegmentsReader.java
*** SegmentsReader.java	10 Feb 2002 22:59:12 -0000	1.5
--- SegmentsReader.java	13 May 2002 03:36:17 -0000
***************
*** 107,112 ****
--- 107,129 ----
      int i = readerIndex(n);			  // find segment num
      readers[i].doDelete(n - starts[i]);		  // dispatch to segment reader
    }
+   
+   public final String[] getIndexedFieldNames() {
+     Hashtable h = new Hashtable();
+     for (int i = 0; i < this.readers.length; i++) {
+         FieldInfos fieldInfos = this.readers[i].fieldInfos;
+             for (int j = 0; j < fieldInfos.size(); j++) {
+                 FieldInfo fi = fieldInfos.fieldInfo(j);
+                 if (fi.isIndexed) h.put(fi.name, Boolean.TRUE);
+             }
+     }
+     java.util.Enumeration it = h.keys();
+     java.util.Vector v = new java.util.Vector();
+     while (it.hasMoreElements()) { 
+         v.add(it.nextElement()); 
+     }
+     return (String[]) v.toArray(new String[v.size()]);
+   }
  
    private final int readerIndex(int n) {	  // find reader for doc n:
      int lo = 0;					  // search starts array