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JacksonFeature.java
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JacksonFeature.java
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/*
* Copyright (c) 2012, 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.jackson;
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.glassfish.jersey.jackson.internal.DefaultJacksonJaxbJsonProvider;
import org.glassfish.jersey.jackson.internal.FilteringJacksonJaxbJsonProvider;
import org.glassfish.jersey.jackson.internal.JacksonFilteringFeature;
import org.glassfish.jersey.jackson.internal.jackson.jaxrs.base.JsonMappingExceptionMapper;
import org.glassfish.jersey.jackson.internal.jackson.jaxrs.base.JsonParseExceptionMapper;
import org.glassfish.jersey.jackson.internal.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import org.glassfish.jersey.message.filtering.EntityFilteringFeature;
/**
* Feature used to register Jackson JSON providers.
*
* @author Stepan Kopriva
* @author Michal Gajdos
*/
public class JacksonFeature implements Feature {
/**
* Define whether to use Jackson's exception mappers ore not
* Using them can provide a useful information to the user, but it can expose unnecessary information, too.
*/
private final boolean registerExceptionMappers;
/**
* Default constructor enables registering Jackson's exception mappers
*/
public JacksonFeature() {
this(true);
}
private JacksonFeature(boolean registerExceptionMappers) {
this.registerExceptionMappers = registerExceptionMappers;
}
/**
* Create JacksonFeature with working Jackson's exception mappers
* @return JacksonFeature with working Jackson's exception mappers
*/
public static JacksonFeature withExceptionMappers() {
return new JacksonFeature();
}
/**
* Create JacksonFeature without registered Jackson's exception mappers
* @return JacksonFeature without registered Jackson's exception mappers
*/
public static JacksonFeature withoutExceptionMappers() {
return new JacksonFeature(false);
}
private static final String JSON_FEATURE = JacksonFeature.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);
// Register Jackson.
if (!config.isRegistered(JacksonJaxbJsonProvider.class)) {
if (registerExceptionMappers) {
// add the default Jackson exception mappers
context.register(JsonParseExceptionMapper.class);
context.register(JsonMappingExceptionMapper.class);
}
if (EntityFilteringFeature.enabled(config)) {
context.register(JacksonFilteringFeature.class);
context.register(FilteringJacksonJaxbJsonProvider.class, MessageBodyReader.class, MessageBodyWriter.class);
} else {
context.register(DefaultJacksonJaxbJsonProvider.class, MessageBodyReader.class, MessageBodyWriter.class);
}
}
return true;
}
}