CssSelectorSpecificity.java

package fr.openwide.core.wicket.more.notification.service.impl;

import org.apache.commons.lang3.builder.CompareToBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

/**
 * @see {@link http://www.w3.org/TR/css3-selectors/#specificity}
 */
public class CssSelectorSpecificity implements Comparable<CssSelectorSpecificity> {

	public static final CssSelectorSpecificity STYLE = new CssSelectorSpecificity(true, 0, 0, 0);
	
	private final boolean isStyle;
	private final int idSelectors;
	private final int classAndPseudoClassSelectors;
	private final int typeSelectorsAndPseudoElements;
	
	public CssSelectorSpecificity(int idSelectors, int classAndPseudoClassSelectors, int typeSelectorsAndPseudoElements) {
		this(false, idSelectors, classAndPseudoClassSelectors, typeSelectorsAndPseudoElements);
	}

	private CssSelectorSpecificity(boolean isStyle, int idSelectors, int classAndPseudoClassSelectors,
			int typeSelectorsAndPseudoElements) {
		super();
		this.isStyle = isStyle;
		this.idSelectors = idSelectors;
		this.classAndPseudoClassSelectors = classAndPseudoClassSelectors;
		this.typeSelectorsAndPseudoElements = typeSelectorsAndPseudoElements;
	}

	@Override
	public int compareTo(CssSelectorSpecificity other) {
		return new CompareToBuilder()
				.append(isStyle, other.isStyle)
				.append(idSelectors, other.idSelectors)
				.append(classAndPseudoClassSelectors, other.classAndPseudoClassSelectors)
				.append(typeSelectorsAndPseudoElements, other.typeSelectorsAndPseudoElements)
				.build();
	}
	
	@Override
	public boolean equals(Object obj) {
		if (obj == null) {
			return false;
		}
		if (obj == this) {
			return true;
		}
		if (!(obj instanceof CssSelectorSpecificity)) {
			return false;
		}
		CssSelectorSpecificity other = (CssSelectorSpecificity) obj;
		return compareTo(other) == 0;
	}
	
	@Override
	public int hashCode() {
		return new HashCodeBuilder()
				.append(isStyle)
				.append(idSelectors)
				.append(classAndPseudoClassSelectors)
				.append(typeSelectorsAndPseudoElements)
				.build();
	}
	
	@Override
	public String toString() {
		return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
				.append("isStyle", isStyle)
				.append("idSelectors", idSelectors)
				.append("classAndPseudoClassSelectors", classAndPseudoClassSelectors)
				.append("typeSelectorsAndPseudoElements", typeSelectorsAndPseudoElements)
				.build();
	}

}