HtmlCleaner ITagInfoProvider implementation that handles whitespace gracefully

HtmlUtils.java

package org.htmlcleaner;

public class HtmlUtils{

	/**
	 * @see "http://www.w3.org/TR/html401/struct/text.html#h-9.1"
	 * ASCII space ( )
	 * ASCII tab (	)
	 * carriage return (
)
	 * line feed (
)
	 * ASCII form feed ()
	 * Zero-width space (​)
	 */
    private static final char[] WHITESPACE = " \t\r\n\u000C\u200B".toCharArray();

    public static boolean isHtmlWhitespace(String text){
    	if (text == null || "".equals(text)) {
            return true;
        }
        outer : for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);
            for (int j = 0; j < WHITESPACE.length; j++) {
                if (WHITESPACE[j] == c) {
                    continue outer;
                }
            }
            return false;
        }
        return true;
    }

}

WhitespaceTolerantTagInfo.java

package org.htmlcleaner;

public class WhitespaceTolerantTagInfo extends TagInfo {
	
	public WhitespaceTolerantTagInfo(String name, int contentType, int belongsTo, boolean deprecated, boolean unique, boolean ignorePermitted) {
		super(name, contentType, belongsTo, deprecated, unique, ignorePermitted);
	}

	@Override
	boolean allowsItem(BaseToken token) {
		if(token instanceof ContentNode) {
			if(HtmlUtils.isHtmlWhitespace(((ContentNode) token).getContent().toString())){
				return true;
			}
		}
		return super.allowsItem(token);
	}

}

WhitespaceTolerantTagInfoProvider.java

package org.htmlcleaner;


public class WhitespaceTolerantTagInfoProvider extends DefaultTagProvider implements ITagInfoProvider {
	
	/**
	 * 
	 */
	private static final long serialVersionUID = 6349860503307965029L;

	@Override
	public TagInfo put(String key, TagInfo value) {
		WhitespaceTolerantTagInfo info = new WhitespaceTolerantTagInfo(value.getName(), value.getContentType(), value.getBelongsTo(), value.isDeprecated(), value.isUnique(), value.isIgnorePermitted());
		info.setChildTags(value.getChildTags());
		info.setContinueAfterTags(value.getContinueAfterTags());
		info.setCopyTags(value.getCopyTags());
		info.setFatalTag(value.getFatalTag());
		info.setHigherTags(value.getHigherTags());
		info.setMustCloseTags(value.getMustCloseTags());
		info.setPermittedTags(value.getPermittedTags());
		info.setRequiredParent(value.getRequiredParent());
		return super.put(key, info);
	}

}