org.jooby.json.Jackson Maven / Gradle / Ivy
/**
* Apache License
* Version 2.0, January 2004
* http://www.apache.org/licenses/
*
* TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
*
* 1. Definitions.
*
* "License" shall mean the terms and conditions for use, reproduction,
* and distribution as defined by Sections 1 through 9 of this document.
*
* "Licensor" shall mean the copyright owner or entity authorized by
* the copyright owner that is granting the License.
*
* "Legal Entity" shall mean the union of the acting entity and all
* other entities that control, are controlled by, or are under common
* control with that entity. For the purposes of this definition,
* "control" means (i) the power, direct or indirect, to cause the
* direction or management of such entity, whether by contract or
* otherwise, or (ii) ownership of fifty percent (50%) or more of the
* outstanding shares, or (iii) beneficial ownership of such entity.
*
* "You" (or "Your") shall mean an individual or Legal Entity
* exercising permissions granted by this License.
*
* "Source" form shall mean the preferred form for making modifications,
* including but not limited to software source code, documentation
* source, and configuration files.
*
* "Object" form shall mean any form resulting from mechanical
* transformation or translation of a Source form, including but
* not limited to compiled object code, generated documentation,
* and conversions to other media types.
*
* "Work" shall mean the work of authorship, whether in Source or
* Object form, made available under the License, as indicated by a
* copyright notice that is included in or attached to the work
* (an example is provided in the Appendix below).
*
* "Derivative Works" shall mean any work, whether in Source or Object
* form, that is based on (or derived from) the Work and for which the
* editorial revisions, annotations, elaborations, or other modifications
* represent, as a whole, an original work of authorship. For the purposes
* of this License, Derivative Works shall not include works that remain
* separable from, or merely link (or bind by name) to the interfaces of,
* the Work and Derivative Works thereof.
*
* "Contribution" shall mean any work of authorship, including
* the original version of the Work and any modifications or additions
* to that Work or Derivative Works thereof, that is intentionally
* submitted to Licensor for inclusion in the Work by the copyright owner
* or by an individual or Legal Entity authorized to submit on behalf of
* the copyright owner. For the purposes of this definition, "submitted"
* means any form of electronic, verbal, or written communication sent
* to the Licensor or its representatives, including but not limited to
* communication on electronic mailing lists, source code control systems,
* and issue tracking systems that are managed by, or on behalf of, the
* Licensor for the purpose of discussing and improving the Work, but
* excluding communication that is conspicuously marked or otherwise
* designated in writing by the copyright owner as "Not a Contribution."
*
* "Contributor" shall mean Licensor and any individual or Legal Entity
* on behalf of whom a Contribution has been received by Licensor and
* subsequently incorporated within the Work.
*
* 2. Grant of Copyright License. Subject to the terms and conditions of
* this License, each Contributor hereby grants to You a perpetual,
* worldwide, non-exclusive, no-charge, royalty-free, irrevocable
* copyright license to reproduce, prepare Derivative Works of,
* publicly display, publicly perform, sublicense, and distribute the
* Work and such Derivative Works in Source or Object form.
*
* 3. Grant of Patent License. Subject to the terms and conditions of
* this License, each Contributor hereby grants to You a perpetual,
* worldwide, non-exclusive, no-charge, royalty-free, irrevocable
* (except as stated in this section) patent license to make, have made,
* use, offer to sell, sell, import, and otherwise transfer the Work,
* where such license applies only to those patent claims licensable
* by such Contributor that are necessarily infringed by their
* Contribution(s) alone or by combination of their Contribution(s)
* with the Work to which such Contribution(s) was submitted. If You
* institute patent litigation against any entity (including a
* cross-claim or counterclaim in a lawsuit) alleging that the Work
* or a Contribution incorporated within the Work constitutes direct
* or contributory patent infringement, then any patent licenses
* granted to You under this License for that Work shall terminate
* as of the date such litigation is filed.
*
* 4. Redistribution. You may reproduce and distribute copies of the
* Work or Derivative Works thereof in any medium, with or without
* modifications, and in Source or Object form, provided that You
* meet the following conditions:
*
* (a) You must give any other recipients of the Work or
* Derivative Works a copy of this License; and
*
* (b) You must cause any modified files to carry prominent notices
* stating that You changed the files; and
*
* (c) You must retain, in the Source form of any Derivative Works
* that You distribute, all copyright, patent, trademark, and
* attribution notices from the Source form of the Work,
* excluding those notices that do not pertain to any part of
* the Derivative Works; and
*
* (d) If the Work includes a "NOTICE" text file as part of its
* distribution, then any Derivative Works that You distribute must
* include a readable copy of the attribution notices contained
* within such NOTICE file, excluding those notices that do not
* pertain to any part of the Derivative Works, in at least one
* of the following places: within a NOTICE text file distributed
* as part of the Derivative Works; within the Source form or
* documentation, if provided along with the Derivative Works; or,
* within a display generated by the Derivative Works, if and
* wherever such third-party notices normally appear. The contents
* of the NOTICE file are for informational purposes only and
* do not modify the License. You may add Your own attribution
* notices within Derivative Works that You distribute, alongside
* or as an addendum to the NOTICE text from the Work, provided
* that such additional attribution notices cannot be construed
* as modifying the License.
*
* You may add Your own copyright statement to Your modifications and
* may provide additional or different license terms and conditions
* for use, reproduction, or distribution of Your modifications, or
* for any such Derivative Works as a whole, provided Your use,
* reproduction, and distribution of the Work otherwise complies with
* the conditions stated in this License.
*
* 5. Submission of Contributions. Unless You explicitly state otherwise,
* any Contribution intentionally submitted for inclusion in the Work
* by You to the Licensor shall be under the terms and conditions of
* this License, without any additional terms or conditions.
* Notwithstanding the above, nothing herein shall supersede or modify
* the terms of any separate license agreement you may have executed
* with Licensor regarding such Contributions.
*
* 6. Trademarks. This License does not grant permission to use the trade
* names, trademarks, service marks, or product names of the Licensor,
* except as required for reasonable and customary use in describing the
* origin of the Work and reproducing the content of the NOTICE file.
*
* 7. Disclaimer of Warranty. Unless required by applicable law or
* agreed to in writing, Licensor provides the Work (and each
* Contributor provides its Contributions) on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied, including, without limitation, any warranties or conditions
* of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
* PARTICULAR PURPOSE. You are solely responsible for determining the
* appropriateness of using or redistributing the Work and assume any
* risks associated with Your exercise of permissions under this License.
*
* 8. Limitation of Liability. In no event and under no legal theory,
* whether in tort (including negligence), contract, or otherwise,
* unless required by applicable law (such as deliberate and grossly
* negligent acts) or agreed to in writing, shall any Contributor be
* liable to You for damages, including any direct, indirect, special,
* incidental, or consequential damages of any character arising as a
* result of this License or out of the use or inability to use the
* Work (including but not limited to damages for loss of goodwill,
* work stoppage, computer failure or malfunction, or any and all
* other commercial damages or losses), even if such Contributor
* has been advised of the possibility of such damages.
*
* 9. Accepting Warranty or Additional Liability. While redistributing
* the Work or Derivative Works thereof, You may choose to offer,
* and charge a fee for, acceptance of support, warranty, indemnity,
* or other liability obligations and/or rights consistent with this
* License. However, in accepting such obligations, You may act only
* on Your own behalf and on Your sole responsibility, not on behalf
* of any other Contributor, and only if You agree to indemnify,
* defend, and hold each Contributor harmless for any liability
* incurred by, or claims asserted against, such Contributor by reason
* of your accepting any such warranty or additional liability.
*
* END OF TERMS AND CONDITIONS
*
* APPENDIX: How to apply the Apache License to your work.
*
* To apply the Apache License to your work, attach the following
* boilerplate notice, with the fields enclosed by brackets "{}"
* replaced with your own identifying information. (Don't include
* the brackets!) The text should be enclosed in the appropriate
* comment syntax for the file format. We also recommend that a
* file or class name and description of purpose be included on the
* same "printed page" as the copyright notice for easier
* identification within third-party archives.
*
* Copyright 2014 Edgar Espina
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jooby.json;
import static java.util.Objects.requireNonNull;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Optional;
import java.util.Set;
import java.util.TimeZone;
import java.util.function.Consumer;
import javax.inject.Inject;
import org.jooby.Env;
import org.jooby.Jooby;
import org.jooby.MediaType;
import org.jooby.Parser;
import org.jooby.Renderer;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
import com.google.inject.Binder;
import com.google.inject.Key;
import com.google.inject.multibindings.Multibinder;
import com.google.inject.name.Names;
import com.typesafe.config.Config;
/**
* jackson
*
* JSON support from the excellent Jackson
* library.
*
* This module provides a JSON {@link Parser} and {@link Renderer}, but also an
* {@link ObjectMapper}.
*
* usage
*
*
* {
* use(new Jackson());
*
* // sending
* get("/my-api", req {@literal ->} new MyObject());
*
* // receiving a json body
* post("/my-api", req {@literal ->} {
* MyObject obj = req.body(MyObject.class);
* return obj;
* });
*
* // receiving a json param from a multipart or form url encoded
* post("/my-api", req {@literal ->} {
* MyObject obj = req.param("my-object").to(MyObject.class);
* return obj;
* });
* }
*
*
* advanced configuration
*
* If you need a special setting or configuration for your {@link ObjectMapper}:
*
*
*
* {
* use(new Jackson().configure(mapper {@literal ->} {
* // setup your custom object mapper
* });
* }
*
*
* or provide an {@link ObjectMapper} instance:
*
*
* {
* ObjectMapper mapper = ....;
* use(new Jackson(mapper));
* }
*
*
* It is possible to wire Jackson modules too:
*
*
* {
*
* use(new Jackson()
* .module(MyJacksonModuleWiredByGuice.class)
* );
* }
*
*
* This is useful when your jackson module require some dependencies.
*
* @author edgar
* @since 0.6.0
*/
public class Jackson implements Jooby.Module {
private static class PostConfigurer {
@Inject
public PostConfigurer(final ObjectMapper mapper, final Set jacksonModules) {
mapper.registerModules(jacksonModules);
}
}
private final Optional mapper;
private MediaType type = MediaType.json;
private Consumer configurer;
private List>> modules = new ArrayList<>();
private boolean raw;
/**
* Creates a new {@link Jackson} module and use the provided {@link ObjectMapper} instance.
*
* @param mapper {@link ObjectMapper} to apply.
*/
public Jackson(final ObjectMapper mapper) {
this.mapper = Optional.of(requireNonNull(mapper, "The mapper is required."));
}
/**
* Creates a new {@link Jackson} module.
*/
public Jackson() {
this.mapper = Optional.empty();
}
/**
* Set the json type supported by this module, default is: application/json.
*
* @param type Media type.
* @return This module.
*/
public Jackson type(final MediaType type) {
this.type = type;
return this;
}
/**
* Set the json type supported by this module, default is: application/json.
*
* @param type Media type.
* @return This module.
*/
public Jackson type(final String type) {
return type(MediaType.valueOf(type));
}
/**
* Apply advanced configuration over the provided {@link ObjectMapper}.
*
* @param configurer A configurer callback.
* @return This module.
*/
public Jackson doWith(final Consumer configurer) {
this.configurer = requireNonNull(configurer, "ObjectMapper configurer is required.");
return this;
}
/**
* Register the provided module.
*
* @param module A module instance.
* @return This module.
*/
public Jackson module(final Module module) {
requireNonNull(module, "Jackson Module is required.");
modules.add(binder -> binder.addBinding().toInstance(module));
return this;
}
/**
* Register the provided {@link Module}. The module will be instantiated by Guice.
*
* @param module Module type.
* @return This module.
*/
public Jackson module(final Class module) {
requireNonNull(module, "Jackson Module is required.");
modules.add(binder -> binder.addBinding().to(module));
return this;
}
/**
* Add support raw string json responses:
*
* {@code
* {
* get("/raw", () -> {
* return "{\"raw\": \"json\"}";
* });
* }
* }
*
* @return This module.
*/
public Jackson raw() {
raw = true;
return this;
}
@Override
public void configure(final Env env, final Config config, final Binder binder) {
// provided or default mapper.
ObjectMapper mapper = this.mapper.orElseGet(() -> {
ObjectMapper m = new ObjectMapper();
Locale locale = env.locale();
// Jackson clone the date format in order to make dateFormat thread-safe
m.setDateFormat(new SimpleDateFormat(config.getString("application.dateFormat"), locale));
m.setLocale(locale);
m.setTimeZone(TimeZone.getTimeZone(config.getString("application.tz")));
// default modules:
m.registerModule(new Jdk8Module());
m.registerModule(new JavaTimeModule());
m.registerModule(new ParameterNamesModule());
return m;
});
if (configurer != null) {
configurer.accept(mapper);
}
// bind mapper
binder.bind(ObjectMapper.class).toInstance(mapper);
// Jackson Modules from Guice
Multibinder mbinder = Multibinder.newSetBinder(binder, Module.class);
modules.forEach(m -> m.accept(mbinder));
// Jackson Configurer (like a post construct)
binder.bind(PostConfigurer.class).asEagerSingleton();
// json parser & renderer
JacksonParser parser = new JacksonParser(mapper, type);
JacksonRenderer renderer = raw
? new JacksonRawRenderer(mapper, type)
: new JacksonRenderer(mapper, type);
Multibinder.newSetBinder(binder, Renderer.class)
.addBinding()
.toInstance(renderer);
Multibinder.newSetBinder(binder, Parser.class)
.addBinding()
.toInstance(parser);
// direct access?
binder.bind(Key.get(Renderer.class, Names.named(renderer.toString()))).toInstance(renderer);
binder.bind(Key.get(Parser.class, Names.named(parser.toString()))).toInstance(parser);
}
}