/*
* Copyright (c) 2011, grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
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* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
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package org.jowidgets.spi.impl.mask;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import org.jowidgets.common.mask.ICharacterMask;
import org.jowidgets.common.mask.ITextMask;
public final class TextMaskMatcher {
private final ITextMask textMask;
public TextMaskMatcher(final ITextMask textMask) {
super();
this.textMask = textMask;
}
public MatchResult match(final int startMaskPos, final String input) {
if (input == null || input.isEmpty()) {
final List<Integer> matchResult = Collections.emptyList();
return new MatchResult(matchResult, 0, true);
}
final List<Integer> matchResult = new LinkedList<Integer>();
final List<Integer> matchPositions = getMatchPositions(startMaskPos, input.charAt(0));
if (matchPositions.isEmpty()) {
return new MatchResult(matchResult, input.length(), false);
}
else {
if (input.length() > 1) {
int bestMatchPos = 0;
MatchResult bestMatchResult = null;
int bestMatchIndex = Integer.MIN_VALUE;
for (final Integer matchPos : matchPositions) {
final MatchResult result = match((matchPos.intValue() + 1), input.substring(1, input.length()));
if (result.isMatching()) {
matchResult.add(Integer.valueOf(matchPos));
for (int i = 0; i < input.length() - 1; i++) {
matchResult.add(Integer.valueOf(result.getMaskIndex(i)));
}
return new MatchResult(matchResult, input.length(), true);
}
else if (result.getLastMatch() > bestMatchIndex) {
bestMatchPos = matchPos;
bestMatchResult = result;
bestMatchIndex = result.getLastMatch();
}
}
matchResult.add(Integer.valueOf(bestMatchPos));
for (int i = 0; i < input.length() - 1; i++) {
matchResult.add(Integer.valueOf(bestMatchResult.getMaskIndex(i)));
}
return new MatchResult(matchResult, input.length(), false);
}
else {//input has one character
matchResult.add(Integer.valueOf(matchPositions.get(0)));
return new MatchResult(matchResult, input.length(), true);
}
}
}
private List<Integer> getMatchPositions(final int startMaskPos, final Character character) {
final String characterString = String.valueOf(character.charValue());
final List<Integer> result = new LinkedList<Integer>();
for (int maskIndex = startMaskPos; maskIndex < textMask.getLength(); maskIndex++) {
final ICharacterMask mask = textMask.getCharacterMask(maskIndex);
boolean accept = !mask.isReadonly();
if (mask.getAcceptingRegExp() != null) {
accept = accept && characterString.matches(mask.getAcceptingRegExp());
}
if (mask.getRejectingRegExp() != null) {
accept = accept && !characterString.matches(mask.getRejectingRegExp());
}
if (mask.getPlaceholder() != null) {
accept = accept || character.equals(mask.getPlaceholder());
}
if (accept) {
result.add(Integer.valueOf(maskIndex));
}
if (mask.getPlaceholder() != null) {//the field is mandatory, so no more positions could be considered
break;
}
}
return result;
}
}