--- /dev/null
+package org.apache.lucene.search.suggest;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+import java.io.*;
+
+import org.apache.lucene.search.spell.Dictionary;
+import org.apache.lucene.search.spell.TermFreqIterator;
+
+
+/**
+ * Dictionary represented by a text file.
+ *
+ * <p/>Format allowed: 1 string per line, optionally with a tab-separated integer value:<br/>
+ * word1 TAB 100<br/>
+ * word2 word3 TAB 101<br/>
+ * word4 word5 TAB 102<br/>
+ */
+public class FileDictionary implements Dictionary {
+
+ private BufferedReader in;
+ private String line;
+ private boolean hasNextCalled;
+
+ public FileDictionary(InputStream dictFile) {
+ in = new BufferedReader(new InputStreamReader(dictFile));
+ }
+
+ /**
+ * Creates a dictionary based on a reader.
+ */
+ public FileDictionary(Reader reader) {
+ in = new BufferedReader(reader);
+ }
+
+ public TermFreqIterator getWordsIterator() {
+ return new fileIterator();
+ }
+
+ final class fileIterator implements TermFreqIterator {
+ private float curFreq;
+
+ public String next() {
+ if (!hasNextCalled) {
+ hasNext();
+ }
+ hasNextCalled = false;
+ return line;
+ }
+
+ public float freq() {
+ return curFreq;
+ }
+
+ public boolean hasNext() {
+ hasNextCalled = true;
+ try {
+ line = in.readLine();
+ if (line != null) {
+ String[] fields = line.split("\t");
+ if (fields.length > 1) {
+ curFreq = Float.parseFloat(fields[1]);
+ line = fields[0];
+ } else {
+ curFreq = 1;
+ }
+ }
+ } catch (IOException ex) {
+ throw new RuntimeException(ex);
+ }
+ return (line != null) ? true : false;
+ }
+
+ public void remove() {
+ throw new UnsupportedOperationException();
+ }
+ }
+
+}