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Jersey JSON Jackson (1.x) entity providers support module.

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/*
 * Copyright (c) 2012, 2018 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.jackson1;

import javax.ws.rs.core.Configuration;
import javax.ws.rs.core.Feature;
import javax.ws.rs.core.FeatureContext;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;

import org.glassfish.jersey.CommonProperties;
import org.glassfish.jersey.internal.InternalProperties;
import org.glassfish.jersey.internal.util.PropertiesHelper;

import org.codehaus.jackson.jaxrs.JacksonJaxbJsonProvider;
import org.codehaus.jackson.jaxrs.JsonMappingExceptionMapper;
import org.codehaus.jackson.jaxrs.JsonParseExceptionMapper;

/**
 * Feature used to register Jackson (1.x) JSON providers.
 *
 * @author Stepan Kopriva
 * @author Michal Gajdos
 */
public final class Jackson1Feature implements Feature {

    private static final String JSON_FEATURE = Jackson1Feature.class.getSimpleName();

    @Override
    public boolean configure(final FeatureContext context) {
        final Configuration config = context.getConfiguration();

        final String jsonFeature = CommonProperties.getValue(config.getProperties(), config.getRuntimeType(),
                InternalProperties.JSON_FEATURE, JSON_FEATURE, String.class);
        // Other JSON providers registered.
        if (!JSON_FEATURE.equalsIgnoreCase(jsonFeature)) {
            return false;
        }

        // Disable other JSON providers.
        context.property(PropertiesHelper.getPropertyNameForRuntime(InternalProperties.JSON_FEATURE, config.getRuntimeType()),
                JSON_FEATURE);

        // add the default Jackson exception mappers
        context.register(JsonParseExceptionMapper.class);
        context.register(JsonMappingExceptionMapper.class);
        context.register(JacksonJaxbJsonProvider.class, MessageBodyReader.class, MessageBodyWriter.class);
        return true;
    }
}