/*
* 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.
*/
package org.apache.bval.jsr303;
import java.lang.reflect.Constructor;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.List;
import javax.validation.ConstraintValidatorFactory;
import javax.validation.MessageInterpolator;
import javax.validation.TraversableResolver;
import javax.validation.ValidationException;
import javax.validation.Validator;
import javax.validation.ValidatorContext;
import org.apache.bval.IntrospectorMetaBeanFactory;
import org.apache.bval.MetaBeanBuilder;
import org.apache.bval.MetaBeanFactory;
import org.apache.bval.MetaBeanFinder;
import org.apache.bval.MetaBeanManager;
import org.apache.bval.jsr303.util.SecureActions;
import org.apache.bval.xml.XMLMetaBeanBuilder;
import org.apache.bval.xml.XMLMetaBeanFactory;
import org.apache.bval.xml.XMLMetaBeanManager;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.reflect.ConstructorUtils;
/**
* Description: Represents the context that is used to create
* <code>ClassValidator</code> instances.<br/>
*/
public class ApacheFactoryContext implements ValidatorContext {
private final ApacheValidatorFactory factory;
private final MetaBeanFinder metaBeanFinder;
private MessageInterpolator messageInterpolator;
private TraversableResolver traversableResolver;
private ConstraintValidatorFactory constraintValidatorFactory;
/**
* Create a new ApacheFactoryContext instance.
*
* @param factory
*/
public ApacheFactoryContext(ApacheValidatorFactory factory) {
this.factory = factory;
this.metaBeanFinder = buildMetaBeanFinder();
}
/**
* Create a new ApacheFactoryContext instance.
*
* @param factory
* @param metaBeanFinder
*/
protected ApacheFactoryContext(ApacheValidatorFactory factory, MetaBeanFinder metaBeanFinder) {
this.factory = factory;
this.metaBeanFinder = metaBeanFinder;
}
/**
* Get the {@link ApacheValidatorFactory} used by this
* {@link ApacheFactoryContext}.
*
* @return {@link ApacheValidatorFactory}
*/
public ApacheValidatorFactory getFactory() {
return factory;
}
/**
* Get the metaBeanFinder.
*
* @return {@link MetaBeanFinder}
*/
public final MetaBeanFinder getMetaBeanFinder() {
return metaBeanFinder;
}
/**
* {@inheritDoc}
*/
public ValidatorContext messageInterpolator(MessageInterpolator messageInterpolator) {
this.messageInterpolator = messageInterpolator;
return this;
}
/**
* {@inheritDoc}
*/
public ValidatorContext traversableResolver(TraversableResolver traversableResolver) {
this.traversableResolver = traversableResolver;
return this;
}
/**
* {@inheritDoc}
*/
public ValidatorContext constraintValidatorFactory(ConstraintValidatorFactory constraintValidatorFactory) {
this.constraintValidatorFactory = constraintValidatorFactory;
return this;
}
/**
* Get the {@link ConstraintValidatorFactory}.
*
* @return {@link ConstraintValidatorFactory}
*/
public ConstraintValidatorFactory getConstraintValidatorFactory() {
return constraintValidatorFactory == null ? factory.getConstraintValidatorFactory()
: constraintValidatorFactory;
}
/**
* {@inheritDoc}
*/
public Validator getValidator() {
ClassValidator validator = new ClassValidator(this);
if (Boolean.parseBoolean(factory.getProperties().get(
ApacheValidatorConfiguration.Properties.TREAT_MAPS_LIKE_BEANS))) {
validator.setTreatMapsLikeBeans(true);
}
return validator;
}
/**
* Get the {@link MessageInterpolator}.
*
* @return {@link MessageInterpolator}
*/
public MessageInterpolator getMessageInterpolator() {
return messageInterpolator == null ? factory.getMessageInterpolator() : messageInterpolator;
}
/**
* Get the {@link TraversableResolver}.
*
* @return {@link TraversableResolver}
*/
public TraversableResolver getTraversableResolver() {
return traversableResolver == null ? factory.getTraversableResolver() : traversableResolver;
}
/**
* Create MetaBeanManager that uses factories:
* <ol>
* <li>if enabled by
* {@link ApacheValidatorConfiguration.Properties#ENABLE_INTROSPECTOR}, an
* {@link IntrospectorMetaBeanFactory}</li>
* <li>{@link MetaBeanFactory} types (if any) specified by
* {@link ApacheValidatorConfiguration.Properties#METABEAN_FACTORY_CLASSNAMES}
* </li>
* <li>if no {@link Jsr303MetaBeanFactory} has yet been specified (this
* allows factory order customization), a {@link Jsr303MetaBeanFactory}
* which handles both JSR303-XML and JSR303-Annotations</li>
* <li>if enabled by
* {@link ApacheValidatorConfiguration.Properties#ENABLE_METABEANS_XML}, an
* {@link XMLMetaBeanFactory}</li>
* </ol>
*
* @return a new instance of MetaBeanManager with adequate MetaBeanFactories
*/
protected MetaBeanFinder buildMetaBeanFinder() {
List<MetaBeanFactory> builders = new ArrayList<MetaBeanFactory>();
if (Boolean.parseBoolean(factory.getProperties().get(
ApacheValidatorConfiguration.Properties.ENABLE_INTROSPECTOR))) {
builders.add(new IntrospectorMetaBeanFactory());
}
String[] factoryClassNames =
StringUtils.split(
factory.getProperties().get(ApacheValidatorConfiguration.Properties.METABEAN_FACTORY_CLASSNAMES));
if (factoryClassNames != null) {
for (String clsName : factoryClassNames) {
// cast, relying on #createMetaBeanFactory to throw the exception if incompatible:
@SuppressWarnings("unchecked")
Class<? extends MetaBeanFactory> factoryClass = (Class<? extends MetaBeanFactory>) loadClass(clsName);
builders.add(createMetaBeanFactory(factoryClass));
}
}
boolean jsr303Found = false;
for (MetaBeanFactory builder : builders) {
jsr303Found |= builder instanceof Jsr303MetaBeanFactory;
}
if (!jsr303Found) {
builders.add(new Jsr303MetaBeanFactory(this));
}
@SuppressWarnings("deprecation")
boolean enableMetaBeansXml = Boolean.parseBoolean(factory.getProperties().get(
ApacheValidatorConfiguration.Properties.ENABLE_METABEANS_XML));
if (enableMetaBeansXml) {
XMLMetaBeanManagerCreator.addFactory(builders);
}
return createMetaBeanManager(builders);
}
/**
* Create a {@link MetaBeanManager} using the specified builders.
*
* @param builders
* {@link MetaBeanFactory} {@link List}
* @return {@link MetaBeanManager}
*/
@SuppressWarnings("deprecation")
protected MetaBeanFinder createMetaBeanManager(List<MetaBeanFactory> builders) {
// as long as we support both: jsr303 (in the builders list) and xstream-xml metabeans:
if (Boolean.parseBoolean(factory.getProperties().get(
ApacheValidatorConfiguration.Properties.ENABLE_METABEANS_XML))) {
return XMLMetaBeanManagerCreator.createXMLMetaBeanManager(builders);
}
return new MetaBeanManager(new MetaBeanBuilder(builders.toArray(new MetaBeanFactory[builders.size()])));
}
private <F extends MetaBeanFactory> F createMetaBeanFactory(final Class<F> cls) {
return run(new PrivilegedAction<F>() {
public F run() {
try {
Constructor<F> c = ConstructorUtils.getMatchingAccessibleConstructor(cls, ApacheFactoryContext.this.getClass());
if (c != null) {
return c.newInstance(ApacheFactoryContext.this);
}
c = ConstructorUtils.getMatchingAccessibleConstructor(cls, getFactory().getClass());
if (c != null) {
return c.newInstance(getFactory());
}
return cls.newInstance();
} catch (Exception e) {
throw new ValidationException(e);
}
}
});
}
/**
* separate class to prevent the classloader to immediately load optional
* classes: XMLMetaBeanManager, XMLMetaBeanFactory, XMLMetaBeanBuilder that
* might not be available in the classpath
*/
private static class XMLMetaBeanManagerCreator {
static void addFactory(List<MetaBeanFactory> builders) {
builders.add(new XMLMetaBeanFactory());
}
/**
* Create the {@link MetaBeanManager} to process JSR303 XML. Requires
* bval-xstream at RT.
*
* @param builders
* @return {@link MetaBeanManager}
*/
// NOTE - We return MetaBeanManager instead of XMLMetaBeanManager to
// keep
// bval-xstream an optional module.
protected static MetaBeanManager createXMLMetaBeanManager(List<MetaBeanFactory> builders) {
return new XMLMetaBeanManager(
new XMLMetaBeanBuilder(builders.toArray(new MetaBeanFactory[builders.size()])));
}
}
private static <T> T doPrivileged(final PrivilegedAction<T> action) {
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(action);
} else {
return action.run();
}
}
private Class<?> loadClass(final String className) {
ClassLoader loader = doPrivileged(SecureActions.getContextClassLoader());
if (loader == null)
loader = getClass().getClassLoader();
try {
return Class.forName(className, true, loader);
} catch (ClassNotFoundException ex) {
throw new ValidationException("Unable to load class: " + className, ex);
}
}
private static <T> T run(PrivilegedAction<T> action) {
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(action);
} else {
return action.run();
}
}
}