/*
* Copyright (C) 2011 eXo Platform SAS.
*
* This 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 software 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.portal.resource;
/**
* Designed to plugged into SkipCommentReader for custom handling of comment block
*
* @author <a href="hoang281283@gmail.com">Minh Hoang TO</a>
* @date 6/28/11
*/
public abstract class CommentBlockHandler {
public abstract void handle(CharSequence commentBlock, SkipCommentReader reader);
/**
* A handler that push back content of comment block into the cache if content of comment block is
*
* orientation=lt or orientation=rt
*/
public static class OrientationCommentBlockHandler extends CommentBlockHandler {
private static final String LT = "orientation=lt";
private static final String RT = "orientation=rt";
@Override
public void handle(CharSequence commentBlock, SkipCommentReader reader) {
if (findInterestingContentIn(commentBlock)) {
reader.pushback(commentBlock);
reader.setNumberOfCommingEscapes(commentBlock.length()); /* The comment block won't be skipped */
}
}
/**
* Return true if content of comment block is either
*
* orientation=lt or orientation=rt
*
* @param commentBlock
* @return
*/
private boolean findInterestingContentIn(CharSequence commentBlock) {
int indexOfFirstO = 0;
while (indexOfFirstO < commentBlock.length()) {
if (commentBlock.charAt(indexOfFirstO) == 'o') {
break;
} else {
indexOfFirstO++;
}
}
if (commentBlock.length() <= (indexOfFirstO + LT.length())) {
return false;
}
for (int i = 0; i < LT.length(); i++) {
if (commentBlock.charAt(indexOfFirstO + i) != LT.charAt(i) && i != (LT.length() - 2)) {
return false;
}
}
return commentBlock.charAt(indexOfFirstO + LT.length() - 2) == 'l'
|| commentBlock.charAt(indexOfFirstO + LT.length() - 2) == 'r';
}
}
}