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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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package cz.vutbr.web.csskit;

import java.util.ArrayList;
import java.util.List;

import cz.vutbr.web.css.Declaration;
import cz.vutbr.web.css.PrettyOutput;
import cz.vutbr.web.css.Rule;
import cz.vutbr.web.css.RuleMargin;
import cz.vutbr.web.css.RulePage;
import cz.vutbr.web.css.Selector;

/**
 * Wrap of declarations bounded with a page rule 
 * 
 * @author kapy
 * @author Jan Svercl, VUT Brno, 2008
 * @author Bert Frees, 2012
 */
public class RulePageImpl extends AbstractRuleBlock> implements RulePage {

	protected String name;
	protected Selector.PseudoPage pseudo;
	
	protected RulePageImpl() {
		super();
		this.name = null;
		this.pseudo = null;
		replaceAll(new ArrayList>());
	}
	
	/**
	 * Gets name of the page
	 */
	public String getName() {
		return name;
	}

	/**
	 * Sets name of the page
	 * @param name The name to set
	 * @return Modified instance
	 */
	public RulePage setName(String name) {
		this.name = name;
		return this;
	}
	
	/**
	 * Gets pseudo-class of the page
	 */
	public Selector.PseudoPage getPseudo() {
		return pseudo;
	}

	/**
	 * Sets pseudo-class of the page
	 * @param pseudo The pseudo-class to set
	 * @return Modified instance
	 */
	public RulePage setPseudo(Selector.PseudoPage pseudo) {
		this.pseudo = pseudo;
		return this;
	}

	@Override
	public boolean add(Rule element) {
		if (element instanceof Declaration || element instanceof RuleMargin)
			return super.add(element);
		else
			throw new IllegalArgumentException("Element must be either a Declaration or a RuleMargin");
	}

	@Override 
	public String toString() {
		return this.toString(0);
	}
	
    public String toString(int depth) {
    	
    	StringBuilder sb = new StringBuilder();
    	
    	sb.append(OutputUtil.PAGE_KEYWORD);
    	if(name != null && !"".equals(name))
    		sb.append(OutputUtil.SPACE_DELIM).append(name);
    	if(pseudo != null)
    		sb.append(pseudo.toString());
    	
    	// append declarations and margin rules
    	sb.append(OutputUtil.RULE_OPENING);
    	@SuppressWarnings({ "unchecked", "rawtypes" })
        List rules = (List)list;
    	sb = OutputUtil.appendList(sb, rules, OutputUtil.EMPTY_DELIM, depth + 1);
    	sb.append(OutputUtil.RULE_CLOSING).append(OutputUtil.PAGE_CLOSING);
    
    	return sb.toString();
    }

	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = super.hashCode();
		result = prime * result + ((pseudo == null) ? 0 : pseudo.hashCode());
		return result;
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (!super.equals(obj))
			return false;
		if (!(obj instanceof RulePageImpl))
			return false;
		RulePageImpl other = (RulePageImpl) obj;
		if (pseudo == null) {
			if (other.pseudo != null)
				return false;
		} else if (!pseudo.equals(other.pseudo))
			return false;
		return true;
	}
    
    
   
}