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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) 2010, 2020 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.message.internal;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;

import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.Variant;

/**
 * An implementation of {@link VariantListBuilder}.
 *
 * @author Paul Sandoz
 * @author Marek Potociar
 */
public class VariantListBuilder extends Variant.VariantListBuilder {

    private List variants;
    private final List mediaTypes = new ArrayList();
    private final List languages = new ArrayList();
    private final List encodings = new ArrayList();

    @Override
    public List build() {
        if (!mediaTypes.isEmpty() || !languages.isEmpty() || !encodings.isEmpty()) {
            // if current state is not empty, add combinations to the variant list
            add();
        }
        if (variants == null) {
            variants = new ArrayList();
        }

        return variants;
    }

    @Override
    public VariantListBuilder add() {
        if (variants == null) {
            variants = new ArrayList();
        }

        addMediaTypes();

        languages.clear();
        encodings.clear();
        mediaTypes.clear();

        return this;
    }

    private void addMediaTypes() {
        if (mediaTypes.isEmpty()) {
            addLanguages(null);
        } else {
            for (MediaType mediaType : mediaTypes) {
                addLanguages(mediaType);
            }
        }
    }

    private void addLanguages(MediaType mediaType) {
        if (languages.isEmpty()) {
            addEncodings(mediaType, null);
        } else {
            for (Locale language : languages) {
                addEncodings(mediaType, language);
            }
        }
    }

    private void addEncodings(MediaType mediaType, Locale language) {
        if (encodings.isEmpty()) {
            addVariant(mediaType, language, null);
        } else {
            for (String encoding : encodings) {
                addVariant(mediaType, language, encoding);
            }
        }
    }

    private void addVariant(MediaType mediaType, Locale language, String encoding) {
        variants.add(new Variant(mediaType, language, encoding));
    }

    @Override
    public VariantListBuilder languages(Locale... languages) {
        this.languages.addAll(Arrays.asList(languages));
        return this;
    }

    @Override
    public VariantListBuilder encodings(String... encodings) {
        this.encodings.addAll(Arrays.asList(encodings));
        return this;
    }

    @Override
    public VariantListBuilder mediaTypes(MediaType... mediaTypes) {
        this.mediaTypes.addAll(Arrays.asList(mediaTypes));
        return this;
    }
}