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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.domassign;

import cz.vutbr.web.css.CombinedSelector;
import cz.vutbr.web.css.Declaration;
import cz.vutbr.web.css.StyleSheet;
import cz.vutbr.web.csskit.DeclarationImpl;

/**
 * Adds specificity to declaration from its selector.
 * This class shares declaration with its parent class.
 *
 * @author burgetr
 * @author kapy
 */
public class AssignedDeclaration extends DeclarationImpl implements Declaration {
	
	protected CombinedSelector.Specificity spec;
	protected StyleSheet.Origin origin;

	/**
	 * Creates assigned declaration from specificity and shallow copy of declaration
	 * @param d Declaration to be shallow-copied
	 * @param spec Specificity
	 */
	public AssignedDeclaration(Declaration d, CombinedSelector.Specificity spec, StyleSheet.Origin origin) {
		super(d);
		this.spec = spec;
		this.origin = origin;
	}
	
	/**
	 * Creates assigned declaration from selector and shallow copy of declaration 
	 * @param d Declaration to be shallow-copied
	 * @param s CombinedSelector, which's specificity is computed inside
	 */
	public AssignedDeclaration(Declaration d, CombinedSelector s, StyleSheet.Origin origin) {
		this(d, s.computeSpecificity(), origin);
	}
	
	@Override
	public int compareTo(Declaration other) {
		
		if( !(other instanceof AssignedDeclaration))
			return super.compareTo(other);
		
		AssignedDeclaration o = (AssignedDeclaration) other;

		int res = getOriginOrder() - o.getOriginOrder();
		if (res == 0)
			return this.spec.compareTo(o.spec);
		else
			return res;
	}

	/**
	 * Computes the priority order of the declaration based on its origin and importance
	 * according to the CSS specification.
	 * @return The priority order (1..5).
	 * @see http://www.w3.org/TR/CSS21/cascade.html#cascading-order
	 */
	public int getOriginOrder()
	{
		if (important)
		{
			if (origin == StyleSheet.Origin.AUTHOR)
				return 4;
			else if (origin == StyleSheet.Origin.AGENT)
				return 1;
			else
				return 5;
		}
		else
		{
			if (origin == StyleSheet.Origin.AUTHOR)
				return 3;
			else if (origin == StyleSheet.Origin.AGENT)
				return 1;
			else
				return 2;
		}
	}
	
	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = super.hashCode();
		result = prime * result + ((spec == null) ? 0 : spec.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 AssignedDeclaration))
			return false;
		AssignedDeclaration other = (AssignedDeclaration) obj;
		if (spec == null) {
			if (other.spec != null)
				return false;
		} else if (!spec.equals(other.spec))
			return false;
		return true;
	}
	
	
	
}