org.primefaces.metadata.BeanValidationMetadataExtractor Maven / Gradle / Ivy
/*
* Copyright 2009-2014 PrimeTek.
*
* 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.primefaces.metadata;
import java.util.Set;
import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.el.ValueReference;
import javax.faces.context.FacesContext;
import javax.validation.Validator;
import javax.validation.metadata.BeanDescriptor;
import javax.validation.metadata.ConstraintDescriptor;
import javax.validation.metadata.PropertyDescriptor;
import org.primefaces.context.RequestContext;
import org.primefaces.el.ValueExpressionAnalyzer;
public class BeanValidationMetadataExtractor {
public static Set> extract(FacesContext context, RequestContext requestContext, ValueExpression ve) {
if (ve != null) {
ELContext elContext = context.getELContext();
ValueReference vr = ValueExpressionAnalyzer.getReference(elContext, ve);
if (vr != null) {
Validator validator = requestContext.getApplicationContext().getValidatorFactory().getValidator();
Object base = vr.getBase();
Object property = vr.getProperty();
if (base != null && property != null) {
BeanDescriptor beanDescriptor = validator.getConstraintsForClass(base.getClass());
if (beanDescriptor != null) {
PropertyDescriptor propertyDescriptor = beanDescriptor.getConstraintsForProperty(property.toString());
if (propertyDescriptor != null) {
return propertyDescriptor.getConstraintDescriptors();
}
}
}
}
}
return null;
}
}