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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 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
 * http://glassfish.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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 * 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
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 * recipient has the option to distribute your version of this file under
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 */
package org.glassfish.jersey.internal.inject;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import org.glassfish.jersey.internal.Errors;
import org.glassfish.jersey.internal.LocalizationMessages;
import org.glassfish.jersey.internal.util.ReflectionHelper;

import org.glassfish.hk2.api.ClassAnalyzer;
import org.glassfish.hk2.api.InjectionResolver;
import org.glassfish.hk2.api.IterableProvider;
import org.glassfish.hk2.api.MultiException;
import org.glassfish.hk2.utilities.binding.AbstractBinder;

/**
 * Implementation of the {@link ClassAnalyzer} that supports selection
 * of the constructor with largest number of parameters as defined in
 * and required by JAX-RS specification.
 *
 * @author John Wells (john.wells at oracle.com)
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
@Singleton
@Named(JerseyClassAnalyzer.NAME)
public final class JerseyClassAnalyzer implements ClassAnalyzer {
    /**
     * Name of the analyzer service.
     */
    public static final String NAME = "JerseyClassAnalyzer";

    /**
     * HK2 binder for the JAX-RS compliant class analyzer implementation.
     */
    public static final class Binder extends AbstractBinder {

        @Override
        protected void configure() {
            bind(JerseyClassAnalyzer.class)
                    .analyzeWith(ClassAnalyzer.DEFAULT_IMPLEMENTATION_NAME)
                    .named(JerseyClassAnalyzer.NAME)
                    .to(ClassAnalyzer.class)
                    .in(Singleton.class);
        }
    }

    private final ClassAnalyzer defaultAnalyzer;
    private final Set> resolverAnnotations;

    /**
     * Injection constructor.
     *
     * @param defaultAnalyzer default HK2 class analyzer.
     * @param resolvers       configured injection resolvers.
     */
    @Inject
    JerseyClassAnalyzer(@Named(ClassAnalyzer.DEFAULT_IMPLEMENTATION_NAME) ClassAnalyzer defaultAnalyzer,
                        IterableProvider> resolvers) {
        this.defaultAnalyzer = defaultAnalyzer;

        final HashSet> tmp = new HashSet>();
        for (InjectionResolver resolver : resolvers) {
            if (resolver.isConstructorParameterIndicator()) {
                ReflectionHelper.DeclaringClassInterfacePair pair =
                        ReflectionHelper.getClass(resolver.getClass(), InjectionResolver.class);
                final Type paramType = ReflectionHelper.getParameterizedTypeArguments(pair)[0];
                final Class paramClass = ReflectionHelper.erasure(paramType);
                if (Annotation.class.isAssignableFrom(paramClass)) {
                    tmp.add(paramClass.asSubclass(Annotation.class));
                }
            }
        }

        this.resolverAnnotations = (tmp.size() > 0) ?
                Collections.unmodifiableSet(tmp) : Collections.>emptySet();
    }

    @SuppressWarnings("unchecked")
    @Override
    public  Constructor getConstructor(final Class clazz) throws MultiException, NoSuchMethodException {
        if (clazz.isLocalClass()) {
            throw new NoSuchMethodException(LocalizationMessages.INJECTION_ERROR_LOCAL_CLASS_NOT_SUPPORTED(clazz.getName()));
        }
        if (clazz.isMemberClass() && !Modifier.isStatic(clazz.getModifiers())) {
            throw new NoSuchMethodException(
                    LocalizationMessages.INJECTION_ERROR_NONSTATIC_MEMBER_CLASS_NOT_SUPPORTED(clazz.getName()));
        }

        Constructor retVal;
        try {
            retVal = defaultAnalyzer.getConstructor(clazz);

            Class args[] = retVal.getParameterTypes();
            if (args.length != 0) return retVal;

            // Is zero length, but is it specifically marked?
            Inject i = retVal.getAnnotation(Inject.class);
            if (i != null) {
                return retVal;
            }

            // In this case, the default chose a zero-arg constructor since it could find no other
        } catch (NoSuchMethodException ignored) {
            // In this case, the default failed because it found no constructor it could use
        } catch (MultiException me) {
            if (me.getErrors().size() != 1 && !(me.getErrors().get(0) instanceof IllegalArgumentException)) {
                throw me;
            }
            // Otherwise, the default failed because it found more than one constructor
        }

        // At this point, we simply need to find the constructor with the largest number of parameters
        Constructor constructors[] = AccessController.doPrivileged(new PrivilegedAction[]>() {
            @Override
            public Constructor[] run() {
                return clazz.getDeclaredConstructors();
            }
        });
        Constructor selected = null;
        int selectedSize = 0;
        int maxParams = -1;

        for (Constructor constructor : constructors) {
            Class params[] = constructor.getParameterTypes();
            if (params.length >= maxParams && isCompatible(constructor)) {
                if (params.length > maxParams) {
                    maxParams = params.length;
                    selectedSize = 0;
                }

                selected = constructor;
                selectedSize++;
            }
        }

        if (selectedSize == 0) {
            throw new NoSuchMethodException(LocalizationMessages.INJECTION_ERROR_SUITABLE_CONSTRUCTOR_NOT_FOUND(clazz.getName()));
        }

        if (selectedSize > 1) {
            // Found {0} constructors with {1} parameters in {2} class. Selecting the first found constructor: {3}
            Errors.warning(clazz, LocalizationMessages.MULTIPLE_MATCHING_CONSTRUCTORS_FOUND(
                    selectedSize, maxParams, clazz.getName(), selected.toGenericString()));
        }

        return (Constructor) selected;
    }

    @SuppressWarnings("MagicConstant")
    private boolean isCompatible(final Constructor constructor) {
        if (constructor.getAnnotation(Inject.class) != null) {
            // JSR-330 applicable
            return true;
        }

        final int paramSize = constructor.getParameterTypes().length;

        if (paramSize != 0 && resolverAnnotations.isEmpty()) {
            return false;
        }

        if (!Modifier.isPublic(constructor.getModifiers())) {
            // return true for a default constructor, return false otherwise.
            return paramSize == 0 &&
                    (constructor.getDeclaringClass().getModifiers() & (Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE))
                            == constructor.getModifiers();
        }

        for (Annotation[] paramAnnotations : constructor.getParameterAnnotations()) {
            boolean found = false;
            for (Annotation paramAnnotation : paramAnnotations) {
                if (resolverAnnotations.contains(paramAnnotation.annotationType())) {
                    found = true;
                    break;
                }
            }
            if (!found) {
                return false;
            }
        }

        return true;
    }

    @Override
    public  Set getInitializerMethods(Class clazz) throws MultiException {
        return defaultAnalyzer.getInitializerMethods(clazz);
    }

    @Override
    public  Set getFields(Class clazz) throws MultiException {
        return defaultAnalyzer.getFields(clazz);
    }

    @Override
    public  Method getPostConstructMethod(Class clazz) throws MultiException {
        return defaultAnalyzer.getPostConstructMethod(clazz);
    }

    @Override
    public  Method getPreDestroyMethod(Class clazz) throws MultiException {
        return defaultAnalyzer.getPreDestroyMethod(clazz);
    }

}




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