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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.
 * Copyright (c) 2018 Payara Foundation and/or its affiliates.
 *
 * 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.internal.inject;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import javax.inject.Singleton;
import javax.ws.rs.ext.ParamConverter;
import javax.ws.rs.ext.ParamConverterProvider;

/**
 * An aggregate {@link ParamConverterProvider param converter provider} that loads all
 * the registered {@link ParamConverterProvider} implementations.
 * 
 * When invoked, the provider iterates through the registered implementations until
 * it finds the first implementation that returns a non-null {@link ParamConverter param converter},
 * which is subsequently returned from the factory. In case no non-null string reader
 * instance is found, {@code null} is returned from the factory. {@link org.glassfish.jersey.internal.inject.Custom Custom}
 * providers are iterated first, so that user registered providers are preferred against internal jersey providers.
 *
 * @author Paul Sandoz
 * @author Marek Potociar
 * @author Miroslav Fuksa
 */

@Singleton
public class ParamConverterFactory implements ParamConverterProvider {

    private final List converterProviders;

    public ParamConverterFactory(Set providers, Set customProviders) {

        Set copyProviders = new LinkedHashSet<>(providers);
        converterProviders = new ArrayList<>();
        converterProviders.addAll(customProviders);
        copyProviders.removeAll(customProviders);
        converterProviders.addAll(copyProviders);
    }

    @Override
    public  ParamConverter getConverter(Class rawType, Type genericType, Annotation[] annotations) {
        for (ParamConverterProvider provider : converterProviders) {
            @SuppressWarnings("unchecked")
            ParamConverter converter = provider.getConverter(rawType, genericType, annotations);
            if (converter != null) {
                return converter;
            }
        }
        return null;
    }
}