org.apache.lucene.search.spell.PlainTextDictionary Maven / Gradle / Ivy
package org.apache.lucene.search.spell;
/**
* 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.util.Iterator;
import java.io.*;
/**
* Dictionary represented by a text file.
*
* Format allowed: 1 word per line:
* word1
* word2
* word3
*/
public class PlainTextDictionary implements Dictionary {
private BufferedReader in;
private String line;
private boolean hasNextCalled;
public PlainTextDictionary(File file) throws FileNotFoundException {
in = new BufferedReader(new FileReader(file));
}
public PlainTextDictionary(InputStream dictFile) {
in = new BufferedReader(new InputStreamReader(dictFile));
}
/**
* Creates a dictionary based on a reader.
*/
public PlainTextDictionary(Reader reader) {
in = new BufferedReader(reader);
}
public Iterator getWordsIterator() {
return new fileIterator();
}
final class fileIterator implements Iterator {
public String next() {
if (!hasNextCalled) {
hasNext();
}
hasNextCalled = false;
return line;
}
public boolean hasNext() {
hasNextCalled = true;
try {
line = in.readLine();
} catch (IOException ex) {
throw new RuntimeException(ex);
}
return (line != null) ? true : false;
}
public void remove() {
throw new UnsupportedOperationException();
}
}
}