echopointng.richtext.AbstractRichTextSpellChecker Maven / Gradle / Ivy
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/*
* This file is part of the Echo Point Project. This project is a collection
* of Components that have extended the Echo Web Application Framework.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
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* the terms of any one of the MPL, the GPL or the LGPL.
*/
package echopointng.richtext;
import java.io.CharArrayReader;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.util.ArrayList;
import java.util.List;
/**
* AbstractRichTextSpellChecker can be used as basis for building
* more complex spell checkers. It provides a parsing mechanbism for break text
* buffers into a series of words.
*
* The derived class must then provide the checkWords() functionality.
*/
public abstract class AbstractRichTextSpellChecker implements RichTextSpellChecker {
private class CountedReader extends CharArrayReader {
public CountedReader(char buf[]) {
super(buf);
}
public int getPos() {
return pos;
}
}
private class SpellCheckerWordImpl implements SpellCheckerWord {
private int startIndex;
private int endIndex;
private String word;
private SpellCheckerWordImpl(String textBuffer, int startIndex, int endIndex) {
this.endIndex = endIndex;
this.startIndex = startIndex;
this.word = textBuffer.substring(startIndex,endIndex);
}
public int getStartIndex() {
return startIndex;
}
public int getEndIndex() {
return endIndex;
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
StringBuffer sb = new StringBuffer(word);
sb.append(" @ si:");
sb.append(startIndex);
sb.append(" ei:");
sb.append(endIndex);
return sb.toString();
}
}
/**
* @see echopointng.richtext.RichTextSpellChecker#parseWords(java.lang.String)
*/
public SpellCheckerWord[] parseWords(String textBuffer) {
List wordList = new ArrayList();
final CountedReader cr = new CountedReader(textBuffer.toCharArray());
StreamTokenizer st = new StreamTokenizer(cr);
int lastPos = 0;
int tt = 0;
try {
tt = st.nextToken();
while (tt != java.io.StreamTokenizer.TT_EOF) {
String token = "";
switch (tt) {
case java.io.StreamTokenizer.TT_WORD:
// A word was found; the value is in sval
token = st.sval;
break;
case java.io.StreamTokenizer.TT_EOF:
// End of file has been reached
break;
default:
// A regular character was found; the value is the token
// itself
token = new String(new char[] { (char) tt });
break;
}
String generalWord = textBuffer.substring(lastPos,cr.getPos());
final int startIndex = lastPos + generalWord.indexOf(token);
final int endIndex = startIndex + token.length();
SpellCheckerWord word = new SpellCheckerWordImpl(textBuffer,startIndex,endIndex);
wordList.add(word);
// bump our position
lastPos = cr.getPos();
tt = st.nextToken();
}
} catch (IOException e) {
}
return (SpellCheckerWord[]) wordList.toArray(new SpellCheckerWord[wordList.size()]);
}
}