/*
* JBoss, Home of Professional Open Source
* Copyright 2012, 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.aggregated;
import java.util.Collections;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.validation.GroupSequence;
import javax.validation.metadata.GroupConversionDescriptor;
import org.hibernate.validator.internal.metadata.descriptor.GroupConversionDescriptorImpl;
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;
/**
* Provides group conversion functionality to {@link org.hibernate.validator.cfg.context.Cascadable}s.
*
* @author Gunnar Morling
*/
public class GroupConversionHelper {
private static final Log log = LoggerFactory.make();
private final Map<Class<?>, Class<?>> groupConversions;
public GroupConversionHelper(Map<Class<?>, Class<?>> groupConversions) {
this.groupConversions = Collections.unmodifiableMap( groupConversions );
}
/**
* Converts the given validation group as per the group conversion
* configuration for this property (as e.g. specified via
* {@code @ConvertGroup}.
*
* @param from The group to convert.
*
* @return The converted group. Will be the original group itself in case no
* conversion is to be performed.
*/
public Class<?> convertGroup(Class<?> from) {
Class<?> to = groupConversions.get( from );
return to != null ? to : from;
}
/**
* Returns a set with {@link GroupConversionDescriptor}s representing the
* underlying group conversions.
*
* @return A set with group conversion descriptors. May be empty, but never
* {@code null}.
*/
public Set<GroupConversionDescriptor> asDescriptors() {
Set<GroupConversionDescriptor> descriptors = newHashSet( groupConversions.size() );
for ( Entry<Class<?>, Class<?>> conversion : groupConversions.entrySet() ) {
descriptors.add(
new GroupConversionDescriptorImpl(
conversion.getKey(),
conversion.getValue()
)
);
}
return Collections.unmodifiableSet( descriptors );
}
public void validateGroupConversions(boolean isCascaded, String location) {
//group conversions may only be configured for cascadable elements
if ( !isCascaded && !groupConversions.isEmpty() ) {
throw log.getGroupConversionOnNonCascadingElementException( location );
}
//group conversions may not be configured using a sequence as source
for ( Class<?> oneGroup : groupConversions.keySet() ) {
if ( isGroupSequence( oneGroup ) ) {
throw log.getGroupConversionForSequenceException( oneGroup );
}
}
}
private boolean isGroupSequence(Class<?> oneGroup) {
return oneGroup.isAnnotationPresent( GroupSequence.class );
}
}