Looking for a CSS Parser in java [closed]

Question

I'm looking for a CSS Parser in java. In particular my requirement is, for a given node/element in an HTML document, to be able to ask/get the css styles for that element from the Parser.

I know there is the W3C SAC interface and one or 2 implementations based on this - but turorials/examples appear non-existant.

Any help/points in right direction much appreciated.

Thanks

Answer 1

I've used CSSParser and I like it- it gives good feedback on errors as well.

Here's some sample code I've found and modified:

package com.dlogic;  import com.steadystate.css.parser.CSSOMParser; import org.w3c.css.sac.InputSource; import org.w3c.dom.css.CSSStyleSheet; import org.w3c.dom.css.CSSRuleList; import org.w3c.dom.css.CSSRule; import org.w3c.dom.css.CSSStyleRule; import org.w3c.dom.css.CSSStyleDeclaration; import java.io.*;   public class CSSParserTest  {      protected static CSSParserTest oParser;      public static void main(String[] args) {              oParser = new CSSParserTest();              if (oParser.Parse("design.css")) {                  System.out.println("Parsing completed OK");              } else {                  System.out.println("Unable to parse CSS");              }        }        public boolean Parse(String cssfile)       {           FileOutputStream out = null;           PrintStream ps = null;           boolean rtn = false;           try          {                  // cssfile accessed as a resource, so must be in the pkg (in src dir).                 InputStream stream = oParser.getClass().getResourceAsStream(cssfile);                   // overwrites and existing file contents                  out = new FileOutputStream("log.txt");                   if (out != null)                  {                      //log file                      ps = new PrintStream( out );                      System.setErr(ps); //redirects stderr to the log file as well                   } else {                       return rtn;                   }                   InputSource source = new InputSource(new InputStreamReader(stream));                 CSSOMParser parser = new CSSOMParser();                 // parse and create a stylesheet composition                 CSSStyleSheet stylesheet = parser.parseStyleSheet(source, null, null);                  //ANY ERRORS IN THE DOM WILL BE SENT TO STDERR HERE!!                 // now iterate through the dom and inspect.                  CSSRuleList ruleList = stylesheet.getCssRules();                  ps.println("Number of rules: " + ruleList.getLength());                  for (int i = 0; i < ruleList.getLength(); i++)                 {                  CSSRule rule = ruleList.item(i);                  if (rule instanceof CSSStyleRule)                   {                      CSSStyleRule styleRule=(CSSStyleRule)rule;                      ps.println("selector:" + i + ": " + styleRule.getSelectorText());                      CSSStyleDeclaration styleDeclaration = styleRule.getStyle();                        for (int j = 0; j < styleDeclaration.getLength(); j++)                       {                           String property = styleDeclaration.item(j);                           ps.println("property: " + property);                           ps.println("value: " + styleDeclaration.getPropertyCSSValue(property).getCssText());                           ps.println("priority: " + styleDeclaration.getPropertyPriority(property));                         }                      }// end of StyleRule instance test                 } // end of ruleList loop                 if (out != null) out.close();                if (stream != null) stream.close();                rtn = true;             }             catch (IOException ioe)             {                 System.err.println ("IO Error: " + ioe);             }             catch (Exception e)             {                 System.err.println ("Error: " + e);              }             finally             {                 if (ps != null) ps.close();              }              return rtn;      }  }