/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.javacore.parser;

import org.netbeans.jmi.javamodel.Annotation;
import org.netbeans.lib.java.parser.ASTree;
import org.netbeans.lib.java.parser.ASTreeTypes;

/**
 * @author Tomas Hurka
 * @author Pavel Flaska
 */
public final class AnnotationInfoMeasure implements Measure {
    public static final AnnotationInfoMeasure INSTANCE = new AnnotationInfoMeasure();

    private static final int NAME_WEIGHT = 70;
    private static final int VALUES_WEIGHT = 30;
    
    /** Creates a new instance of ClassMeasure */
    private AnnotationInfoMeasure() {
    }
    
    /** Compares Java Field to ASTree object.
     * @param refObject Must be Java Field
     * @param asTree
     * @return distance
     */
    public int getDistance(Object refObject, Object ast) {
        if (ast instanceof AnnotationInfo) {
            AnnotationInfo astInfo = (AnnotationInfo) ast;
            Annotation refInfo = (Annotation) refObject;
            int result = StringMeasure.INSTANCE.getDistance(refInfo.getName(), astInfo.name)*NAME_WEIGHT;
            result += new OrderedArrayMeasure(ClassNameMeasure.INSTANCE).getDistance(refInfo.getAttributeValues().toArray(), astInfo.values)*VALUES_WEIGHT;
            result/=100;
            return result > INFINITE_DISTANCE ? INFINITE_DISTANCE : result;
        }
        return INFINITE_DISTANCE;
    }
}