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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 cz.vutbr.web.css.Declaration;
import cz.vutbr.web.css.RuleMargin;

/**
 * Implementation of RuleMargin
 * 
 * @author Bert Frees, 2012
 */
public class RuleMarginImpl extends AbstractRuleBlock implements RuleMargin {

	private MarginArea marginArea;

	protected RuleMarginImpl(String area) {
		for (MarginArea a : MarginArea.values()) {
			if (a.value.equals(area)) {
				marginArea = a;
				break; }}
		if (marginArea == null)
			throw new IllegalArgumentException("Illegal value for margin area: " + area);
	}

	public MarginArea getMarginArea() {
		return marginArea;
	}

	@Override
	public String toString() {
		return this.toString(0);
	}
	
	public String toString(int depth) {
		
		StringBuilder sb = new StringBuilder();
		
		sb = OutputUtil.appendTimes(sb, OutputUtil.DEPTH_DELIM, depth);
		sb.append(OutputUtil.MARGIN_AREA_OPENING).append(marginArea.value);
		
		sb.append(OutputUtil.RULE_OPENING);
		sb = OutputUtil.appendList(sb, list, OutputUtil.RULE_DELIM, depth + 1);
		sb.append(OutputUtil.RULE_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 + ((marginArea == null) ? 0 : marginArea.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 RuleMarginImpl))
			return false;
		RuleMarginImpl other = (RuleMarginImpl) obj;
		if (marginArea == null) {
			if (other.marginArea != null)
				return false;
		} else if (!marginArea.equals(other.marginArea))
			return false;
		return true;
	}
}