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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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/*
 * Copyright (c) 2012, 2019 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.glassfish.jersey.server.internal.inject;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.function.Function;
import java.util.function.Supplier;

import javax.ws.rs.Encoded;

import javax.inject.Provider;

import org.glassfish.jersey.internal.inject.Injectee;
import org.glassfish.jersey.internal.inject.InjectionResolver;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import org.glassfish.jersey.server.ContainerRequest;
import org.glassfish.jersey.server.model.Parameter;
import org.glassfish.jersey.server.spi.internal.ValueParamProvider;

/**
 * Abstract base class for resolving JAX-RS {@code @XxxParam} injection.
 *
 * @param  supported parameter injection annotation.
 * @author Marek Potociar
 */
public class ParamInjectionResolver implements InjectionResolver {

    private final ValueParamProvider valueParamProvider;
    private final Class annotation;
    private final Provider request;

    /**
     * Initialize the base parameter injection resolver.
     *
     * @param valueParamProvider parameter value supplier provider.
     */
    public ParamInjectionResolver(ValueParamProvider valueParamProvider, Class annotation,
            Provider request) {
        this.valueParamProvider = valueParamProvider;
        this.annotation = annotation;
        this.request = request;
    }

    @Override
    @SuppressWarnings("unchecked")
    public Object resolve(Injectee injectee) {
        AnnotatedElement annotated = injectee.getParent();
        Annotation[] annotations;
        if (annotated.getClass().equals(Constructor.class)) {
            annotations = ((Constructor) annotated).getParameterAnnotations()[injectee.getPosition()];
        } else {
            annotations = annotated.getDeclaredAnnotations();
        }

        Class componentClass = injectee.getInjecteeClass();
        Type genericType = injectee.getRequiredType();

        final Type targetGenericType;
        if (injectee.isFactory()) {
            targetGenericType = ReflectionHelper.getTypeArgument(genericType, 0);
        } else {
            targetGenericType = genericType;
        }
        final Class targetType = ReflectionHelper.erasure(targetGenericType);

        final Parameter parameter = Parameter.create(
                componentClass,
                componentClass,
                hasEncodedAnnotation(injectee),
                targetType,
                targetGenericType,
                annotations);

        final Function valueProvider = valueParamProvider.getValueProvider(parameter);
        if (valueProvider != null) {
            if (injectee.isFactory()) {
                return (Supplier) () -> valueProvider.apply(request.get());
            } else {
                return valueProvider.apply(request.get());
            }
        }

        return null;
    }

    private boolean hasEncodedAnnotation(Injectee injectee) {
        AnnotatedElement element = injectee.getParent();

        final boolean isConstructor = element instanceof Constructor;
        final boolean isMethod = element instanceof Method;

        // if injectee is method or constructor, check its parameters
        if (isConstructor || isMethod) {
            Annotation[] annotations;
            if (isMethod) {
                annotations = ((Method) element).getParameterAnnotations()[injectee.getPosition()];
            } else {
                annotations = ((Constructor) element).getParameterAnnotations()[injectee.getPosition()];
            }

            for (Annotation annotation : annotations) {
                if (annotation.annotationType().equals(Encoded.class)) {
                    return true;
                }
            }
        }

        // check injectee itself (method, constructor or field)
        if (element.isAnnotationPresent(Encoded.class)) {
            return true;
        }

        // check class which contains injectee
        Class clazz = injectee.getInjecteeClass();
        return clazz.isAnnotationPresent(Encoded.class);
    }


    @Override
    public boolean isConstructorParameterIndicator() {
        return true;
    }

    @Override
    public boolean isMethodParameterIndicator() {
        return false;
    }

    @Override
    public Class getAnnotation() {
        return annotation;
    }
}