/*
 * Copyright (c) 2015, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.jvnet.hk2.internal;

import java.lang.annotation.Annotation;
import java.lang.ref.SoftReference;
import java.lang.reflect.AnnotatedElement;

/**
 * Keeps information (softly) about annotations
 * 
 * @author jwells
 */
class SoftAnnotatedElementAnnotationInfo {
    private final SoftReference<Annotation[]> elementAnnotationsReference;
    private final SoftReference<Annotation[][]> paramAnnotationsReference;
    private final boolean hasParams;
    private final boolean isConstructor;

    SoftAnnotatedElementAnnotationInfo(Annotation[] elementAnnotation, boolean hasParams, Annotation[][] paramAnnotation, boolean isConstructor) {
        this.elementAnnotationsReference = new SoftReference<Annotation[]>(elementAnnotation);
        this.hasParams = hasParams;
        this.paramAnnotationsReference = new SoftReference<Annotation[][]>(paramAnnotation);
        this.isConstructor = isConstructor;
    }
    
    AnnotatedElementAnnotationInfo harden(AnnotatedElement ae) {
        Annotation[] hardenedElementAnnotations = elementAnnotationsReference.get();
        Annotation[][] hardenedParamAnnotations = paramAnnotationsReference.get();
        
        if (!Utilities.USE_SOFT_REFERENCE || (hardenedElementAnnotations == null) || (hardenedParamAnnotations == null)) {
            return Utilities.computeAEAI(ae);
        }
        
        return new AnnotatedElementAnnotationInfo(hardenedElementAnnotations, hasParams, hardenedParamAnnotations, isConstructor);
    }
}
