org.apache.bval.jsr.JsrMetaBeanFactory Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.bval.jsr;
import org.apache.bval.MetaBeanFactory;
import org.apache.bval.jsr.groups.Group;
import org.apache.bval.jsr.util.ClassHelper;
import org.apache.bval.jsr.xml.MetaConstraint;
import org.apache.bval.model.Features.Property;
import org.apache.bval.model.Meta;
import org.apache.bval.model.MetaBean;
import org.apache.bval.model.MetaConstructor;
import org.apache.bval.model.MetaMethod;
import org.apache.bval.model.MetaParameter;
import org.apache.bval.model.MetaProperty;
import org.apache.bval.util.AccessStrategy;
import org.apache.bval.util.FieldAccess;
import org.apache.bval.util.MethodAccess;
import org.apache.bval.util.reflection.Reflection;
import org.apache.commons.weaver.privilizer.Privilizing;
import org.apache.commons.weaver.privilizer.Privilizing.CallTo;
import javax.validation.ConstraintDeclarationException;
import javax.validation.GroupDefinitionException;
import javax.validation.GroupSequence;
import javax.validation.groups.ConvertGroup;
import javax.validation.groups.Default;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Description: process the class annotations for JSR303 constraint validations to build the MetaBean with information
* from annotations and JSR303 constraint mappings (defined in xml)
*/
@Privilizing(@CallTo(Reflection.class))
public class JsrMetaBeanFactory implements MetaBeanFactory {
/** Shared log instance */
// of dubious utility as it's static :/
protected static final Logger log = Logger.getLogger(JsrMetaBeanFactory.class.getName());
/** {@link javax.validation.ValidatorFactory} used */
protected final ApacheValidatorFactory factory;
/**
* {@link AnnotationProcessor} used.
*/
protected AnnotationProcessor annotationProcessor;
/**
* Create a new Jsr303MetaBeanFactory instance.
*
* @param factory the validator factory.
*/
public JsrMetaBeanFactory(ApacheValidatorFactory factory) {
this.factory = factory;
this.annotationProcessor = new AnnotationProcessor(factory);
}
/**
* {@inheritDoc} Add the validation features to the metabean that come from JSR303 annotations in the beanClass.
*/
@Override
public void buildMetaBean(MetaBean metabean) {
try {
final Class beanClass = metabean.getBeanClass();
processGroupSequence(beanClass, metabean);
// process class, superclasses and interfaces
final List> classSequence =
ClassHelper.fillFullClassHierarchyAsList(new ArrayList>(), beanClass);
// start with superclasses and go down the hierarchy so that
// the child classes are processed last to have the chance to
// overwrite some declarations
// of their superclasses and that they see what they inherit at the
// time of processing
for (int i = classSequence.size() - 1; i >= 0; i--) {
Class eachClass = classSequence.get(i);
processClass(eachClass, metabean);
processGroupSequence(eachClass, metabean, "{GroupSequence:" + eachClass.getCanonicalName() + "}");
}
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(e);
} catch (InvocationTargetException e) {
throw new IllegalArgumentException(e.getTargetException());
}
}
/**
* Process class annotations, field and method annotations.
*
* @param beanClass
* @param metabean
* @throws IllegalAccessException
* @throws InvocationTargetException
*/
private void processClass(Class beanClass, MetaBean metabean)
throws IllegalAccessException, InvocationTargetException {
// if NOT ignore class level annotations
if (!factory.getAnnotationIgnores().isIgnoreAnnotations(beanClass)) {
annotationProcessor.processAnnotations(null, beanClass, beanClass, null,
new AppendValidationToMeta(metabean));
}
final Collection missingValid = new ArrayList();
final Field[] fields = Reflection.getDeclaredFields(beanClass);
for (final Field field : fields) {
MetaProperty metaProperty = metabean.getProperty(field.getName());
// create a property for those fields for which there is not yet a
// MetaProperty
if (!factory.getAnnotationIgnores().isIgnoreAnnotations(field)) {
AccessStrategy access = new FieldAccess(field);
boolean create = metaProperty == null;
if (create) {
metaProperty = addMetaProperty(metabean, access);
}
if (!annotationProcessor.processAnnotations(metaProperty, beanClass, field, access,
new AppendValidationToMeta(metaProperty)) && create) {
metabean.putProperty(metaProperty.getName(), null);
}
if (field.getAnnotation(ConvertGroup.class) != null) {
missingValid.add(field.getName());
}
}
}
final Method[] methods = Reflection.getDeclaredMethods(beanClass);
for (final Method method : methods) {
if (method.isSynthetic() || method.isBridge()) {
continue;
}
String propName = null;
if (method.getParameterTypes().length == 0) {
propName = MethodAccess.getPropertyName(method);
}
if (propName != null) {
if (!factory.getAnnotationIgnores().isIgnoreAnnotations(method)) {
AccessStrategy access = new MethodAccess(propName, method);
MetaProperty metaProperty = metabean.getProperty(propName);
boolean create = metaProperty == null;
// create a property for those methods for which there is
// not yet a MetaProperty
if (create) {
metaProperty = addMetaProperty(metabean, access);
}
if (!annotationProcessor.processAnnotations(metaProperty, beanClass, method, access,
new AppendValidationToMeta(metaProperty)) && create) {
metabean.putProperty(propName, null);
}
}
}
}
addXmlConstraints(beanClass, metabean);
for (final String name : missingValid) {
final MetaProperty metaProperty = metabean.getProperty(name);
if (metaProperty != null && metaProperty.getFeature(Property.REF_CASCADE) == null) {
throw new ConstraintDeclarationException("@ConvertGroup needs @Valid");
}
}
missingValid.clear();
}
/**
* Add cascade validation and constraints from xml mappings
*
* @param beanClass
* @param metabean
* @throws IllegalAccessException
* @throws InvocationTargetException
*/
private void addXmlConstraints(Class beanClass, MetaBean metabean)
throws IllegalAccessException, InvocationTargetException {
for (final MetaConstraint metaConstraint : factory.getMetaConstraints(beanClass)) {
Meta meta;
AccessStrategy access = metaConstraint.getAccessStrategy();
boolean create = false;
if (access == null) { // class level
meta = null;
} else if (access.getElementType() == ElementType.METHOD
&& !metaConstraint.getMember().getName().startsWith("get")) { // TODO: better getter test
final Method method = Method.class.cast(metaConstraint.getMember());
meta = metabean.getMethod(method);
final MetaMethod metaMethod;
if (meta == null) {
meta = new MetaMethod(metabean, method);
metaMethod = MetaMethod.class.cast(meta);
metabean.addMethod(method, metaMethod);
} else {
metaMethod = MetaMethod.class.cast(meta);
}
final Integer index = metaConstraint.getIndex();
if (index != null && index >= 0) {
MetaParameter param = metaMethod.getParameter(index);
if (param == null) {
param = new MetaParameter(metaMethod, index);
metaMethod.addParameter(index, param);
}
param.addAnnotation(metaConstraint.getAnnotation());
} else {
metaMethod.addAnnotation(metaConstraint.getAnnotation());
}
continue;
} else if (access.getElementType() == ElementType.CONSTRUCTOR) {
final Constructor constructor = Constructor.class.cast(metaConstraint.getMember());
meta = metabean.getConstructor(constructor);
final MetaConstructor metaConstructor;
if (meta == null) {
meta = new MetaConstructor(metabean, constructor);
metaConstructor = MetaConstructor.class.cast(meta);
metabean.addConstructor(constructor, metaConstructor);
} else {
metaConstructor = MetaConstructor.class.cast(meta);
}
final Integer index = metaConstraint.getIndex();
if (index != null && index >= 0) {
MetaParameter param = metaConstructor.getParameter(index);
if (param == null) {
param = new MetaParameter(metaConstructor, index);
metaConstructor.addParameter(index, param);
}
param.addAnnotation(metaConstraint.getAnnotation());
} else {
metaConstructor.addAnnotation(metaConstraint.getAnnotation());
}
continue;
} else { // property level
meta = metabean.getProperty(access.getPropertyName());
create = meta == null;
if (create) {
meta = addMetaProperty(metabean, access);
}
}
if (!annotationProcessor.processAnnotation(metaConstraint.getAnnotation(), meta, beanClass,
metaConstraint.getAccessStrategy(), new AppendValidationToMeta(meta == null ? metabean : meta), false)
&& create) {
metabean.putProperty(access.getPropertyName(), null);
}
}
for (final AccessStrategy access : factory.getValidAccesses(beanClass)) {
if (access.getElementType() == ElementType.PARAMETER) {
continue;
}
MetaProperty metaProperty = metabean.getProperty(access.getPropertyName());
boolean create = metaProperty == null;
if (create) {
metaProperty = addMetaProperty(metabean, access);
}
if (!annotationProcessor.addAccessStrategy(metaProperty, access) && create) {
metabean.putProperty(access.getPropertyName(), null);
}
}
}
private void processGroupSequence(Class beanClass, MetaBean metabean) {
processGroupSequence(beanClass, metabean, JsrFeatures.Bean.GROUP_SEQUENCE);
}
private void processGroupSequence(Class beanClass, MetaBean metabean, String key) {
GroupSequence annotation = beanClass.getAnnotation(GroupSequence.class);
List groupSeq = metabean.getFeature(key);
if (groupSeq == null) {
groupSeq =
metabean.initFeature(key, new ArrayList(annotation == null ? 1 : annotation.value().length));
}
Class[] groupClasses = factory.getDefaultSequence(beanClass);
if (groupClasses == null || groupClasses.length == 0) {
if (annotation == null) {
groupSeq.add(Group.DEFAULT);
return;
} else {
groupClasses = annotation.value();
}
}
boolean containsDefault = false;
for (final Class groupClass : groupClasses) {
if (groupClass.getName().equals(beanClass.getName())) {
groupSeq.add(Group.DEFAULT);
containsDefault = true;
} else if (groupClass.getName().equals(Default.class.getName())) {
throw new GroupDefinitionException("'Default.class' must not appear in @GroupSequence! Use '"
+ beanClass.getSimpleName() + ".class' instead.");
} else {
groupSeq.add(new Group(groupClass));
}
}
if (!containsDefault) {
throw new GroupDefinitionException("Redefined default group sequence must contain " + beanClass.getName());
}
log.log(Level.FINEST,
String.format("Default group sequence for bean %s is: %s", beanClass.getName(), groupSeq));
}
/**
* Add a {@link MetaProperty} to a {@link MetaBean}.
* @param parentMetaBean
* @param access
* @return the created {@link MetaProperty}
*/
public static MetaProperty addMetaProperty(MetaBean parentMetaBean, AccessStrategy access) {
final MetaProperty result = new MetaProperty();
final String name = access.getPropertyName();
result.setName(name);
result.setType(access.getJavaType());
parentMetaBean.putProperty(name, result);
return result;
}
}
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