/*
 * Copyright (c) 2013, 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.server.wadl;

import jakarta.ws.rs.core.Feature;
import jakarta.ws.rs.core.FeatureContext;

import jakarta.inject.Singleton;
import jakarta.xml.bind.JAXBException;

import org.glassfish.jersey.internal.inject.AbstractBinder;
import org.glassfish.jersey.internal.util.PropertiesHelper;
import org.glassfish.jersey.server.ServerProperties;
import org.glassfish.jersey.server.internal.LocalizationMessages;
import org.glassfish.jersey.server.model.ModelProcessor;
import org.glassfish.jersey.server.wadl.internal.WadlApplicationContextImpl;
import org.glassfish.jersey.server.wadl.internal.generators.WadlGeneratorJAXBGrammarGenerator;
import org.glassfish.jersey.server.wadl.processor.WadlModelProcessor;

import java.util.logging.Logger;


Feature enabling WADL processing. The feature registers providers and binders needed to enable wadl in the jersey application. One of the providers is wadl model processor which enhances current resources by additional wadl resources like /application.wadl and wadl options method. 
Author:
Miroslav Fuksa/**
 * Feature enabling WADL processing. The feature registers providers and binders needed to enable wadl in the
 * jersey application. One of the providers is {@link ModelProcessor wadl model processor} which enhances
 * current resources by additional wadl resources like {@code /application.wadl} and wadl options method.
 *
 * @author Miroslav Fuksa
 */
public class WadlFeature implements Feature {

    private static final Logger LOGGER = Logger.getLogger(WadlFeature.class.getName());

    @Override
    public boolean configure(FeatureContext context) {
        final boolean disabled = PropertiesHelper.isProperty(context.getConfiguration().getProperty(ServerProperties
                .WADL_FEATURE_DISABLE));
        if (disabled) {
            return false;
        }

        if (!isJaxB()) {
            LOGGER.warning(LocalizationMessages.WADL_FEATURE_DISABLED());
            return false;
        }

        context.register(WadlModelProcessor.class);
        context.register(new AbstractBinder() {
            @Override
            protected void configure() {
                bind(WadlApplicationContextImpl.class).to(WadlApplicationContext.class).in(Singleton.class);
            }
        });

        return true;
    }

    private static boolean isJaxB() {
        try {
            return null != WadlApplicationContextImpl.getJAXBContextFromWadlGenerator(new WadlGeneratorJAXBGrammarGenerator());
        } catch (JAXBException je) {
            return false;
        }
    }
}