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Annotations metadata for Hibernate

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package org.hibernate.annotationfactory;

import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.Map;

/**
 * Encapsulates the data you need to create an annotation. In
 * particular, it stores the type of an Annotation instance
 * and the values of its elements.
 * The "elements" we're talking about are the annotation attributes,
 * not its targets (the term "element" is used ambiguously
 * in Java's annotations documentation).
 *
 * @author Paolo Perrotta
 * @author Davide Marchignoli
 */
public class AnnotationDescriptor {

	private final Class type;

	private final Map elements = new HashMap();

	public AnnotationDescriptor(Class annotationType) {
		type = annotationType;
	}

	public void setValue(String elementName, Object value) {
		elements.put( elementName, value );
	}

	public Object valueOf(String elementName) {
		return elements.get( elementName );
	}

	public boolean containsElement(String elementName) {
		return elements.containsKey( elementName );
	}

	public int numberOfElements() {
		return elements.size();
	}

	public Class type() {
		return type;
	}
}