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jStyleParser is a CSS parser written in Java. It has its own application interface that is designed to allow an efficient CSS processing in Java and mapping the values to the Java data types. It parses CSS 2.1 style sheets into structures that can be efficiently assigned to DOM elements. It is intended be the primary CSS parser for the CSSBox library. While handling errors, it is user agent conforming according to the CSS specification.

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/**
 * SimpleAnalyzer.java
 *
 * Created on 6.6.2012, 13:57:00 by burgetr
 */
package cz.vutbr.web.domassign;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Element;

import cz.vutbr.web.css.MediaSpec;
import cz.vutbr.web.css.NodeData;
import cz.vutbr.web.css.Selector.PseudoElementType;
import cz.vutbr.web.css.StyleSheet;

/**
 * A simple ananalyzer that computes a style for the individual DOM nodes with no mapping and caching.
 * This analyzer is suitable for obtaining the style of individual elements without computing the style
 * for the whole DOM tree. However, in larger scale, the performance of the individual computation
 * is significantly worse.  
 * 
 * @author burgetr
 */
public class DirectAnalyzer extends Analyzer
{
    @SuppressWarnings("unused")
    private static final Logger log = LoggerFactory.getLogger(DirectAnalyzer.class);

    /**
     * Creates the analyzer for a single style sheet.
     * @param sheet The stylesheet that will be used as the source of rules.
     */
    public DirectAnalyzer(StyleSheet sheet)
    {
        super(sheet);
    }

    /**
     * Creates the analyzer for multiple style sheets.
     * @param sheets A list of stylesheets that will be used as the source of rules.
     */
    public DirectAnalyzer(List sheets)
    {
        super(sheets);
    }

    /**
     * Computes the style of an element with an eventual pseudo element for the given media.
     * @param el The DOM element.
     * @param pseudo A pseudo element that should be used for style computation or null if no pseudo element should be used (e.g. :after).
     * @param media Used media specification.
     * @return The relevant declarations from the registered style sheets.
     */
    public NodeData getElementStyle(Element el, PseudoElementType pseudo, MediaSpec media)
    {
        final OrderedRule[] applicableRules = AnalyzerUtil.getApplicableRules(sheets, el, media);
        return AnalyzerUtil.getElementStyle(el, pseudo, getElementMatcher(), getMatchCondition(), applicableRules);
    }

    /**
     * Computes the style of an element with an eventual pseudo element for the given media.
     * @param el The DOM element.
     * @param pseudo A pseudo element that should be used for style computation or null if no pseudo element should be used (e.g. :after).
     * @param media Used media name (e.g. "screen" or "all")
     * @return The relevant declarations from the registered style sheets.
     */
    public NodeData getElementStyle(Element el, PseudoElementType pseudo, String media)
    {
        return getElementStyle(el, pseudo, new MediaSpec(media));
    }
    
    //==========================================================================================

}