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DATAREST-209 - Removed hard dependency on Jackson Hibernate 4 module.

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The build script now declares the Jackson Hibernate 4 as optional dependency to avoid being registered in a non-Hibernate environment. Tightened auto-registration checks to also check for Hibernate 4 presence at all.

We automatically activate verbose date rendering when registering the Joda Time module.
This commit is contained in:
Oliver Gierke
2013-12-19 14:52:44 +01:00
parent af520871dc
commit 204d2870e7
2 changed files with 54 additions and 23 deletions
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72
spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/json/Jackson2DatatypeHelper.java
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@@ -1,46 +1,76 @@
/*
* Copyright 2013 the original author or authors.
*
* 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.springframework.data.rest.webmvc.json;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.Version;
import org.springframework.util.ClassUtils;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.hibernate4.Hibernate4Module;
import com.fasterxml.jackson.datatype.joda.JodaModule;
/**
* Helper class to register datatype modules based on their presence in the classpath.
*
* @author Jon Brisbin
* @author Oliver Gierke
*/
public class Jackson2DatatypeHelper {
private static final Logger LOG = LoggerFactory.getLogger(Jackson2DatatypeHelper.class);
private static final boolean IS_HIBERNATE_AVAILABLE = ClassUtils.isPresent("org.hibernate.Version",
Jackson2DatatypeHelper.class.getClassLoader());
private static final boolean IS_HIBERNATE4_MODULE_AVAILABLE = ClassUtils.isPresent(
"com.fasterxml.jackson.datatype.hibernate4.Hibernate4Module", Jackson2DatatypeHelper.class.getClassLoader());
private static final boolean IS_JODA_MODULE_AVAILABLE = ClassUtils.isPresent(
"com.fasterxml.jackson.datatype.joda.JodaModule", Jackson2DatatypeHelper.class.getClassLoader());
public static void configureObjectMapper(ObjectMapper mapper) {
// Hibernate types
if (IS_HIBERNATE4_MODULE_AVAILABLE) {
try {
mapper.registerModule((Module) Class.forName("com.fasterxml.jackson.datatype.hibernate4.Hibernate4Module")
.newInstance());
} catch (Throwable t) {
if (LOG.isDebugEnabled()) {
LOG.debug(t.getMessage(), t);
}
}
if (IS_HIBERNATE_AVAILABLE && Hibernate4Checker.isHibernate4() && IS_HIBERNATE4_MODULE_AVAILABLE) {
Hibernate4ModuleRegistrar.registerModule(mapper);
}
// JODA time
if (IS_JODA_MODULE_AVAILABLE) {
try {
mapper.registerModule((Module) Class.forName("com.fasterxml.jackson.datatype.joda.JodaModule").newInstance());
} catch (Throwable t) {
if (LOG.isDebugEnabled()) {
LOG.debug(t.getMessage(), t);
}
}
JodaModuleRegistrar.registerModule(mapper);
}
}
private static class Hibernate4Checker {
public static boolean isHibernate4() {
return Version.getVersionString().startsWith("4");
}
}
private static class Hibernate4ModuleRegistrar {
public static void registerModule(ObjectMapper mapper) {
mapper.registerModule(new Hibernate4Module());
}
}
private static class JodaModuleRegistrar {
public static void registerModule(ObjectMapper mapper) {
mapper.registerModule(new JodaModule());
mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
}
}
}