package com.em.validation.client.metadata;
/*
GWT Validation Framework - A JSR-303 validation framework for GWT
(c) 2008 gwt-validation contributors (http://code.google.com/p/gwt-validation/)
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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.
*/
import java.lang.annotation.ElementType;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import javax.validation.groups.Default;
import javax.validation.metadata.ConstraintDescriptor;
import javax.validation.metadata.ElementDescriptor;
import javax.validation.metadata.ElementDescriptor.ConstraintFinder;
import javax.validation.metadata.PropertyDescriptor;
import javax.validation.metadata.Scope;
import com.em.validation.client.metadata.factory.DescriptorFactory;
import com.em.validation.client.reflector.IReflector;
/**
* The constraint finder implementation that uses the special properties of the implemented descriptors to do things
* like navigate the type hierarchy for local and other scopes.
*
* @author chris
*
*/
public class BeanConstraintFinderImpl extends AbstractConstraintFinder {
protected BeanConstraintFinderImpl(IReflector reflector, ElementDescriptor descriptor) {
this.backingReflector = reflector;
}
@Override
public Set<ConstraintDescriptor<?>> findConstraints(Scope scope, Set<ElementType> declaredOnTypes, Set<Class<?>> matchingGroups) {
Set<ConstraintDescriptor<?>> initial = new HashSet<ConstraintDescriptor<?>>();
if(this.backingReflector == null) return initial;
Set<ConstraintDescriptor<?>> results = new HashSet<ConstraintDescriptor<?>>();
Set<String> propertySet = new HashSet<String>();
if(Scope.HIERARCHY.equals(scope)) {
propertySet.addAll(this.backingReflector.getPropertyNames());
} else if(Scope.LOCAL_ELEMENT.equals(scope)) {
propertySet.addAll(this.backingReflector.getDeclaredPropertyNames());
}
//find class level constraint descriptors
if(declaredOnTypes == null || declaredOnTypes.isEmpty() || declaredOnTypes.contains(ElementType.TYPE)) {
Set<ConstraintDescriptor<?>> classDescriptors = this.backingReflector.getClassConstraintDescriptors(scope);
for(ConstraintDescriptor<?> descriptor : classDescriptors) {
//get group set so we can manipulate
Set<Class<?>> groupSet = descriptor.getGroups();
boolean keep = true;
//if there are no matching groups, the matching set is the default group
if(matchingGroups.isEmpty()) {
matchingGroups.add(Default.class);
}
//account for the default group if no groups are present
if(groupSet.isEmpty()) {
groupSet.add(Default.class);
}
//check each found group
boolean found = false;
Iterator<Class<?>> matchingGroupsIter = matchingGroups.iterator();
while (!found && matchingGroupsIter.hasNext()) {
found = this.foundIn(groupSet, matchingGroupsIter.next());
}
keep = keep && found;
if(keep) {
results.add(descriptor);
}
}
}
//get constraints for each property name
for(String propertyName : propertySet) {
PropertyDescriptor property = DescriptorFactory.INSTANCE.getPropertyDescriptor(this.backingReflector, propertyName);
//create finder
ConstraintFinder finder = property.findConstraints()
.lookingAt(scope)
.declaredOn(declaredOnTypes.toArray(new ElementType[]{}))
.unorderedAndMatchingGroups(matchingGroups.toArray(new Class<?>[]{}));
//find and add to results
results.addAll(finder.getConstraintDescriptors());
}
return results;
}
}