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* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.hibernate.validator.internal.metadata.provider;
import java.util.Set;
import javax.validation.ParameterNameProvider;
import org.hibernate.validator.internal.cfg.DefaultConstraintMapping;
import org.hibernate.validator.internal.metadata.core.AnnotationProcessingOptions;
import org.hibernate.validator.internal.metadata.core.AnnotationProcessingOptionsImpl;
import org.hibernate.validator.internal.metadata.core.ConstraintHelper;
import org.hibernate.validator.internal.metadata.raw.BeanConfiguration;
import org.hibernate.validator.internal.util.Contracts;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
import static org.hibernate.validator.internal.util.CollectionHelper.newHashSet;
/**
* A {@link MetaDataProvider} based on the programmatic constraint API.
*
* @author Gunnar Morling
*/
public class ProgrammaticMetaDataProvider extends MetaDataProviderKeyedByClassName {
private static final Log log = LoggerFactory.make();
private final AnnotationProcessingOptions annotationProcessingOptions;
private final ParameterNameProvider parameterNameProvider;
public ProgrammaticMetaDataProvider(ConstraintHelper constraintHelper,
ParameterNameProvider parameterNameProvider,
Set<DefaultConstraintMapping> constraintMappings) {
super( constraintHelper );
Contracts.assertNotNull( constraintMappings );
this.parameterNameProvider = parameterNameProvider;
assertUniquenessOfConfiguredTypes( constraintMappings );
addAllBeanConfigurations( constraintMappings );
annotationProcessingOptions = mergeAnnotationProcessingOptions( constraintMappings );
}
private void assertUniquenessOfConfiguredTypes(Set<DefaultConstraintMapping> mappings) {
Set<Class<?>> allConfiguredTypes = newHashSet();
for ( DefaultConstraintMapping constraintMapping : mappings ) {
for ( Class<?> configuredType : constraintMapping.getConfiguredTypes() ) {
if ( allConfiguredTypes.contains( configuredType ) ) {
throw log.getBeanClassHasAlreadyBeConfiguredViaProgrammaticApiException( configuredType.getName() );
}
}
allConfiguredTypes.addAll( constraintMapping.getConfiguredTypes() );
}
}
private void addAllBeanConfigurations(Set<DefaultConstraintMapping> mappings) {
for ( DefaultConstraintMapping mapping : mappings ) {
Set<BeanConfiguration<?>> beanConfigurations = mapping.getBeanConfigurations(
constraintHelper,
parameterNameProvider
);
for ( BeanConfiguration<?> beanConfiguration : beanConfigurations ) {
addBeanConfiguration( beanConfiguration.getBeanClass(), beanConfiguration );
}
}
}
/**
* Creates a single merged {@code AnnotationProcessingOptions} in case multiple programmatic mappings are provided.
* <p>
* Note that it is made sure at this point that no element (type, property, method etc.) is configured more than once within
* all the given contexts. So the "merge" pulls together the information for all configured elements, but it will never
* merge several configurations for one given element.
*
* @param contexts set of mapping contexts providing annotation processing options to be merged
*
* @return a single annotation processing options object
*/
private AnnotationProcessingOptions mergeAnnotationProcessingOptions(Set<DefaultConstraintMapping> mappings) {
// if we only have one mapping we can return the context of just this mapping
if ( mappings.size() == 1 ) {
return mappings.iterator().next().getAnnotationProcessingOptions();
}
AnnotationProcessingOptions options = new AnnotationProcessingOptionsImpl();
for ( DefaultConstraintMapping mapping : mappings ) {
options.merge( mapping.getAnnotationProcessingOptions() );
}
return options;
}
@Override
public AnnotationProcessingOptions getAnnotationProcessingOptions() {
return annotationProcessingOptions;
}
}