com.liferay.portal.search.suggest.DictionaryReader Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.portal.search.suggest;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.Validator;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
/**
* @author Michael C. Han
*/
public class DictionaryReader {
public DictionaryReader(InputStream inputStream)
throws UnsupportedEncodingException {
this(inputStream, StringPool.UTF8);
}
public DictionaryReader(InputStream inputStream, String encoding)
throws UnsupportedEncodingException {
_utf8 = StringPool.UTF8.equals(encoding);
_bufferedReader = new BufferedReader(
new InputStreamReader(inputStream, encoding));
}
public void accept(DictionaryVisitor dictionaryVisitor) {
Iterator iterator = new DictionaryIterator();
iterator.forEachRemaining(
dictionaryEntry -> {
if (!Validator.isBlank(dictionaryEntry.getWord())) {
dictionaryVisitor.visitDictionaryEntry(dictionaryEntry);
}
});
}
public Iterator getDictionaryEntriesIterator() {
return new DictionaryIterator();
}
private static final int _UNICODE_BYTE_ORDER_MARK = 65279;
private final BufferedReader _bufferedReader;
private final boolean _utf8;
private class DictionaryIterator implements Iterator {
@Override
public boolean hasNext() {
if (!_calledHasNext) {
try {
_line = _bufferedReader.readLine();
_calledHasNext = true;
}
catch (IOException ioe) {
throw new IllegalStateException(ioe);
}
}
if (_line != null) {
return true;
}
return false;
}
@Override
public DictionaryEntry next() {
if (!_calledHasNext) {
hasNext();
}
_calledHasNext = false;
if (_utf8 && !_line.isEmpty() &&
(_line.charAt(0) == _UNICODE_BYTE_ORDER_MARK)) {
_line = _line.substring(1);
}
return new DictionaryEntry(_line);
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
private boolean _calledHasNext;
private String _line;
}
}