org.apache.bval.MetaBeanBuilder Maven / Gradle / Ivy
/*
* 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;
import org.apache.bval.model.MetaBean;
import org.apache.commons.lang.ClassUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
import java.util.Map;
/**
* Description: internal implementation class to construct metabeans with
* factories
*/
public class MetaBeanBuilder {
private static final Logger log = LoggerFactory.getLogger(MetaBeanBuilder.class);
/**
* here you can install different kinds of factories to create MetaBeans
* from
*/
private MetaBeanFactory[] factories;
/**
* Create a new MetaBeanBuilder instance.
*/
public MetaBeanBuilder() {
this(new MetaBeanFactory[] { new IntrospectorMetaBeanFactory() });
}
/**
* Create a new MetaBeanBuilder instance.
*
* @param factories
*/
public MetaBeanBuilder(MetaBeanFactory[] factories) {
setFactories(factories);
}
/**
* Get the configured set of {@link MetaBeanFactory} objects.
*
* @return {@link MetaBeanFactory} array
*/
public MetaBeanFactory[] getFactories() {
return factories;
}
/**
* Set the array of {@link MetaBeanFactory} instances with which to enrich
* {@link MetaBean}s.
*
* @param factories
*/
public void setFactories(MetaBeanFactory[] factories) {
this.factories = factories;
}
/**
* Build a {@link MetaBean} for a given id.
*
* @param beanInfoId
* @return MetaBean
* @throws Exception
* if unable to build
*/
public MetaBean buildForId(String beanInfoId) throws Exception {
throw new IllegalArgumentException("MetaBean " + beanInfoId + " not found");
}
/**
* Build beans for all known ids. Default implementation returns an empty
* map.
*
* @return Map of String : MetaBean
*/
public Map buildAll() throws Exception {
return new HashMap();
}
/**
* Find the named class.
*
* @param className
* @return Class found or null
*/
protected Class findLocalClass(String className) {
if (className != null) {
try {
return ClassUtils.getClass(className);
} catch (ClassNotFoundException e) {
log.trace("class not found: " + className, e);
}
}
return null;
}
/**
* Build a MetaBean for the specified class.
*
* @param clazz
* @return MetaBean
* @throws Exception
*/
public MetaBean buildForClass(Class clazz) throws Exception {
MetaBean meta = new MetaBean();
if (clazz != null) { // local class here?
meta.setBeanClass(clazz);
meta.setId(clazz.getName()); // default id = full class name!
}
for (MetaBeanFactory factory : factories) {
factory.buildMetaBean(meta);
}
return meta;
}
}