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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012 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.
 *
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 *
 * GPL Classpath Exception:
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 *
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 */
package org.glassfish.hk2.api;

/**
 * This exception will be found in a {@link MultiException} when a class
 * has a dependency that should be satisfied but cannot be.  The specific
 * InjectionPoint that could not be satisfied can be found in the exception.
 * @author jwells
 *
 */
public class UnsatisfiedDependencyException extends HK2RuntimeException {
    /**
     * For serialization
     */
    private static final long serialVersionUID = 1191047707346290567L;
    
    private final transient Injectee injectionPoint;

    /**
     * Use this if the injectee is unknown
     */
    public UnsatisfiedDependencyException() {
        this(null);
    }

    /**
     * Constructs the exception with the given injectee
     * 
     * @param injectee The injectee that is Unsatisfied, or null if the injectee is unknown
     */
    public UnsatisfiedDependencyException(Injectee injectee) {
        super("There was no object available for injection at " + ((injectee == null) ? "" : injectee.toString()));
        
        this.injectionPoint = injectee;
    }
    
    /**
     * Returns the injectee that is unsatisfied
     * 
     * @return The injectee that is unsatisfied
     */
    public Injectee getInjectee() {
        return injectionPoint;
    }
}