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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
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 */
package org.glassfish.hk2.configuration.internal;

import javax.inject.Singleton;

import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.Filter;
import org.glassfish.hk2.api.Operation;
import org.glassfish.hk2.api.ValidationInformation;
import org.glassfish.hk2.api.Validator;

/**
 * @author jwells
 *
 */
@Singleton
public class ConfiguredValidator implements Validator {
    private boolean validateLookup(ValidationInformation info) {
        ActiveDescriptor candidate = info.getCandidate();
        if (candidate.getName() != null) {
            // Any named 
            return true;
        }
        
        if (info.getInjectee() != null) {
            // May not be injected anywhere
            return false;
        }
        
        Filter f = info.getFilter();
        if ((f != null) && (f instanceof NoNameTypeFilter)) {
            // OK, we are getting this internally
            return true;
        }
        
        return false;
    }

    /* (non-Javadoc)
     * @see org.glassfish.hk2.api.Validator#validate(org.glassfish.hk2.api.ValidationInformation)
     */
    @Override
    public boolean validate(ValidationInformation info) {
        if (Operation.LOOKUP.equals(info.getOperation())) {
            return validateLookup(info);
        }
        
        if (Operation.BIND.equals(info.getOperation())) {
            return true;
            
        }
        
        if (Operation.UNBIND.equals(info.getOperation())) {
            return true;
        }
        
        // Unknown operation, I guess it is ok
        return true;
    }

}