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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, 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.internal.util;

import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.lang.reflect.WildcardType;

/**
 * Type visitor contract.
 *
 * @param  type visiting result type.
 * @author Kohsuke Kawaguchi
 * @author Marek Potociar
 */
abstract class TypeVisitor {

    /**
     * Visit the type and a given parameter.
     *
     * @param type visited type.
     * @return visiting result.
     */
    public final T visit(final Type type) {
        assert type != null;

        if (type instanceof Class) {
            return onClass((Class) type);
        }
        if (type instanceof ParameterizedType) {
            return onParameterizedType((ParameterizedType) type);
        }
        if (type instanceof GenericArrayType) {
            return onGenericArray((GenericArrayType) type);
        }
        if (type instanceof WildcardType) {
            return onWildcard((WildcardType) type);
        }
        if (type instanceof TypeVariable) {
            return onVariable((TypeVariable) type);
        }

        // covered all the cases
        assert false;

        throw createError(type);
    }

    /**
     * Visit class.
     *
     * @param clazz visited class.
     * @return visit result.
     */
    protected abstract T onClass(Class clazz);

    /**
     * Visit parameterized type.
     *
     * @param type visited parameterized type.
     * @return visit result.
     */
    protected abstract T onParameterizedType(ParameterizedType type);

    /**
     * Visit generic array type.
     *
     * @param type visited parameterized type.
     * @return visit result.
     */
    protected abstract T onGenericArray(GenericArrayType type);

    /**
     * Visit type variable.
     *
     * @param type visited parameterized type.
     * @return visit result.
     */
    protected abstract T onVariable(TypeVariable type);

    /**
     * Visit wildcard type.
     *
     * @param type visited parameterized type.
     * @return visit result.
     */
    protected abstract T onWildcard(WildcardType type);

    /**
     * Create visiting error (in case the visitor could not recognize the visit type.
     *
     * @param type visited parameterized type.
     * @return visit result.
     */
    protected RuntimeException createError(final Type type) {
        throw new IllegalArgumentException();
    }
}