mirror of https://github.com/apache/lucene.git
move the word list loader from analysis.de to analysis, as it is not specific to German at all
git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150436 13f79535-47bb-0310-9956-ffa450edef68
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package org.apache.lucene.analysis;
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/**
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* Copyright 2004 The Apache Software Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.LineNumberReader;
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import java.util.HashSet;
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import java.util.Hashtable;
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import java.util.Iterator;
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/**
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* Loader for text files that represent a list of stopwords.
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*
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* @author Gerhard Schwarz
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* @version $Id$
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*/
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public class WordlistLoader {
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/**
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* Loads a text file and adds every line as an entry to a HashSet (omitting
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* leading and trailing whitespace). Every line of the file should contain only
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* one word. The words need to be in lowercase if you make use of an
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* Analyzer which uses LowerCaseFilter (like GermanAnalyzer).
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*
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* @param wordfile File containing the wordlist
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* @return A HashSet with the file's words
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*/
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public static HashSet getWordSet(File wordfile) throws IOException {
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HashSet result = new HashSet();
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FileReader freader = null;
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LineNumberReader lnr = null;
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try {
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freader = new FileReader(wordfile);
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lnr = new LineNumberReader(freader);
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String word = null;
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while ((word = lnr.readLine()) != null) {
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result.add(word.trim());
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}
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}
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finally {
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if (lnr != null)
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lnr.close();
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if (freader != null)
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freader.close();
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}
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return result;
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}
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/**
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* @param path Path to the wordlist
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* @param wordfile Name of the wordlist
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*
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* @deprecated Use {@link #getWordSet(File)} getWordSet(File)} instead
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*/
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public static Hashtable getWordtable(String path, String wordfile) throws IOException {
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return getWordtable(new File(path, wordfile));
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}
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/**
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* @param wordfile Complete path to the wordlist
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*
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* @deprecated Use {@link #getWordSet(File)} getWordSet(File)} instead
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*/
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public static Hashtable getWordtable(String wordfile) throws IOException {
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return getWordtable(new File(wordfile));
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}
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/**
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* @param wordfile File object that points to the wordlist
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*
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* @deprecated Use {@link #getWordSet(File)} getWordSet(File)} instead
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*/
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public static Hashtable getWordtable(File wordfile) throws IOException {
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HashSet wordSet = (HashSet)getWordSet(wordfile);
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Hashtable result = makeWordTable(wordSet);
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return result;
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}
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/**
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* Builds a wordlist table, using words as both keys and values
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* for backward compatibility.
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*
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* @param wordSet stopword set
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*/
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private static Hashtable makeWordTable(HashSet wordSet) {
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Hashtable table = new Hashtable();
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for (Iterator iter = wordSet.iterator(); iter.hasNext();) {
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String word = (String)iter.next();
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table.put(word, word);
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}
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return table;
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}
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}
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