com.sun.hk2.component.InjectableParametizedConstructorCreator Maven / Gradle / Ivy

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/*
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2011 Sun Microsystems, Inc. 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.html
 * or glassfish/bootstrap/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 glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s):
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * 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
 * holder.
 */
package com.sun.hk2.component;

import org.jvnet.hk2.component.*;

import java.lang.annotation.Annotation;
import java.lang.reflect.*;

/**
 * Component for which constructors takes @Inject annotated parameters
 *
 * @author Jerome Dochez
 */
public class InjectableParametizedConstructorCreator extends ConstructorCreator {

    final Constructor ctor;

    public InjectableParametizedConstructorCreator(Class type, Constructor ctor, Habitat habitat, MultiMap metadata) {
        super(type, habitat, metadata);
        this.ctor = ctor;
    }

    @SuppressWarnings("unchecked")
    @Override
    public T create(Inhabitant onBehalfOf) throws ComponentException {
        Annotation paramsAnnotations[][] = ctor.getParameterAnnotations();
        Class paramTypes[] = ctor.getParameterTypes();
        Type genericParamTypes[] = ctor.getGenericParameterTypes();
        Object paramValues[] = new Object[paramTypes.length];
        int firstIndex =paramTypes.length-genericParamTypes.length;
        paramValues[0]=null;
        for (int i=0;i resolverInhabitant : Creators.getAllInjectionResolvers(habitat)) {
                InjectionResolver resolver = resolverInhabitant.get();
                final Annotation a = getAnnotation(resolver.type, paramAnnotations);
                if (a == null) continue;

                AnnotatedElement annotatedElement = new AnnotatedElement() {
                    @Override
                    public boolean isAnnotationPresent(Class annotationClass) {
                        return getAnnotation(annotationClass) != null;
                    }

                    @Override
                    public  T getAnnotation(final Class annotationClass) {
                        return InjectableParametizedConstructorCreator.this.getAnnotation(annotationClass, paramAnnotations);
                    }

                    @Override
                    public Annotation[] getAnnotations() {
                        return paramAnnotations;
                    }

                    @Override
                    public Annotation[] getDeclaredAnnotations() {
                        return paramAnnotations;
                    }
                };
                Object value = resolver.getValue(this, onBehalfOf, annotatedElement, genericParamTypes[i], paramType);
                if (value != null) {
                    paramValues[i + firstIndex] = value;
                    break;
                }
                nonOptionalInjection = !resolver.isOptional(annotatedElement, a);
            }
            if ((paramValues[i + firstIndex] == null && nonOptionalInjection)) {
                throw new UnsatisfiedDependencyException(ctor, null, 
                        new UnsatisfiedDependencyException(genericParamTypes[i + firstIndex], paramTypes[i + firstIndex], null, null));
            }
        }
        try {
            return ctor.newInstance(paramValues);
        } catch(InvocationTargetException e) {
            throw new ComponentException("Failed to create "+type,e);
        } catch (InstantiationException e) {
            throw new ComponentException("Failed to create "+type,e);
        } catch (IllegalAccessException e) {
            try {
              ctor.setAccessible(true);
              return ctor.newInstance(paramValues);
            } catch (Exception e1) {
              // ignore
            }
            throw new ComponentException("Failed to create "+type,e);
        } catch (LinkageError e) {
            throw new ComponentException("Failed to create "+type,e);
        } catch (RuntimeException e) {
            throw new ComponentException("Failed to create "+type,e);
        }
    }


    private   U getAnnotation(Class annotationType, Annotation paramAnnotation[]) {
        if (ctor.isAnnotationPresent(annotationType)) {
            return ctor.getAnnotation(annotationType);
        }
        for (Annotation a : paramAnnotation) {
            if (a.annotationType().equals(annotationType))
                return annotationType.cast(a);
        }
        return null;
    }
}