com.impetus.kundera.metadata.MetadataBuilder Maven / Gradle / Ivy
/*******************************************************************************
* * Copyright 2012 Impetus Infotech.
* *
* * 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 com.impetus.kundera.metadata;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.persistence.Entity;
import javax.persistence.NamedNativeQueries;
import javax.persistence.NamedNativeQuery;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.PersistenceException;
import javax.persistence.Table;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.impetus.kundera.PersistenceProperties;
import com.impetus.kundera.metadata.model.ApplicationMetadata;
import com.impetus.kundera.metadata.model.EntityMetadata;
import com.impetus.kundera.metadata.model.KunderaMetadata;
import com.impetus.kundera.metadata.model.PersistenceUnitMetadata;
import com.impetus.kundera.metadata.processor.CacheableAnnotationProcessor;
import com.impetus.kundera.metadata.processor.EntityListenersProcessor;
import com.impetus.kundera.metadata.processor.IndexProcessor;
import com.impetus.kundera.metadata.processor.TableProcessor;
import com.impetus.kundera.metadata.validator.EntityValidator;
import com.impetus.kundera.metadata.validator.EntityValidatorImpl;
import com.impetus.kundera.metadata.validator.InvalidEntityDefinitionException;
/**
* Concrete implementation of IMetadataManager.
*
* @author animesh.kumar
*/
public class MetadataBuilder
{
/** the log used by this class. */
private static Logger log = LoggerFactory.getLogger(MetadataBuilder.class);
/** The metadata processors. */
private List metadataProcessors;
/** The Validator. */
private EntityValidator validator;
/** persistence unit */
private String persistenceUnit;
/** kundera client */
private String client;
private Map puProperties;
/**
* Instantiates a new metadata manager.
*
*/
public MetadataBuilder(String puName, String client, Map puProperties)
{
this.persistenceUnit = puName;
this.client = client;
this.puProperties = puProperties;
validator = new EntityValidatorImpl(puProperties);
metadataProcessors = new ArrayList();
// add processors to chain.
metadataProcessors.add(new TableProcessor(puProperties));
metadataProcessors.add(new CacheableAnnotationProcessor());
metadataProcessors.add(new IndexProcessor());
metadataProcessors.add(new EntityListenersProcessor());
}
/**
* Validate.
*
* @param clazz
* the clazz
*
* @throws PersistenceException
* the persistence exception
*/
public final void validate(Class clazz) throws PersistenceException
{
validator.validate(clazz);
}
/**
* Process.
*
* @param clazz
* the clazz
* @param externalProperties
* @return the entity metadata
*/
public EntityMetadata buildEntityMetadata(Class clazz)
{
EntityMetadata metadata = new EntityMetadata(clazz);
validate(clazz);
if (log.isDebugEnabled())
log.debug("Processing @Entity >> " + clazz);
for (MetadataProcessor processor : metadataProcessors)
{
// // in case it is not intend for current persistence unit.
// checkForRDBMS(metadata);
// checkForNeo4J(metadata);
setSchemaAndPU(clazz, metadata);
processor.process(clazz, metadata);
metadata = belongsToPersistenceUnit(metadata);
if (metadata == null)
{
break;
}
// Check for schema attribute of Table annotation.
if (MetadataUtils.isSchemaAttributeRequired(metadata.getPersistenceUnit())
&& StringUtils.isBlank(metadata.getSchema()))
{
if (log.isErrorEnabled())
{
log.error("It is mandatory to specify Schema alongwith Table name:" + metadata.getTableName()
+ ". This entity won't be persisted");
}
throw new InvalidEntityDefinitionException("It is mandatory to specify Schema alongwith Table name:"
+ metadata.getTableName() + ". This entity won't be persisted");
}
}
return metadata;
}
/**
* If parameterised metadata is not for intended persistence unit, assign it
* to null.
*
* @param metadata
* entity metadata
* @return metadata.
*/
private EntityMetadata belongsToPersistenceUnit(EntityMetadata metadata)
{
// if pu is null and client is not rdbms OR metadata pu does not match
// with configured one. don't process for anything.
PersistenceUnitMetadata puMetadata = KunderaMetadata.INSTANCE.getApplicationMetadata()
.getPersistenceUnitMetadata(persistenceUnit);
String keyspace = puProperties != null ? (String) puProperties.get(PersistenceProperties.KUNDERA_KEYSPACE):null;
keyspace = keyspace == null ? puMetadata.getProperty(PersistenceProperties.KUNDERA_KEYSPACE):keyspace;
if (metadata.getPersistenceUnit() != null && !metadata.getPersistenceUnit().equals(persistenceUnit)
|| (keyspace != null && metadata.getSchema() != null && !metadata.getSchema().equals(keyspace)))
{
metadata = null;
}
else
{
applyMetadataChanges(metadata);
}
/*
* if ((metadata.getPersistenceUnit() == null &&
* !(Constants.RDBMS_CLIENT_FACTORY.equalsIgnoreCase(client) ||
* Constants.NEO4J_CLIENT_FACTORY .equalsIgnoreCase(client))) ||
* metadata.getPersistenceUnit() != null &&
* !metadata.getPersistenceUnit().equals(persistenceUnit)) { metadata =
* null; }
*/
return metadata;
}
private void applyMetadataChanges(EntityMetadata metadata)
{
metadata.setPersistenceUnit(persistenceUnit);
PersistenceUnitMetadata puMetadata = KunderaMetadata.INSTANCE.getApplicationMetadata()
.getPersistenceUnitMetadata(persistenceUnit);
String keyspace = puProperties != null ? (String) puProperties.get(PersistenceProperties.KUNDERA_KEYSPACE):null;
keyspace = keyspace == null ? puMetadata.getProperty(PersistenceProperties.KUNDERA_KEYSPACE):keyspace;
// precedence to @Table annotation.
if (metadata.getSchema() == null)
{
metadata.setSchema(keyspace);
}
if (metadata.getTableName() == null)
{
metadata.setTableName(metadata.getEntityClazz().getSimpleName());
}
}
private void setSchemaAndPU(Class clazz, EntityMetadata metadata)
{
Table table = clazz.getAnnotation(Table.class);
if (table != null)
{
// !StringUtils.isBlank(clazz.getAnnotation(Entity.class).name())
// Set Name of persistence object
metadata.setTableName(!StringUtils.isBlank(table.name()) ?
table.name() : clazz.getSimpleName());
// Add named/native query related application metadata.
addNamedNativeQueryMetadata(clazz);
// set schema name and persistence unit name (if provided)
String schemaStr = table.schema();
MetadataUtils.setSchemaAndPersistenceUnit(metadata, schemaStr, puProperties);
}
if (metadata.getPersistenceUnit() == null)
{
metadata.setPersistenceUnit(persistenceUnit);
}
}
/**
* Add named/native query annotated fields to application meta data.
*
* @param clazz
* entity class.
*/
private void addNamedNativeQueryMetadata(Class clazz)
{
ApplicationMetadata appMetadata = KunderaMetadata.INSTANCE.getApplicationMetadata();
String name, query = null;
if (clazz.isAnnotationPresent(NamedQuery.class))
{
NamedQuery ann = (NamedQuery) clazz.getAnnotation(NamedQuery.class);
appMetadata.addQueryToCollection(ann.name(), ann.query(), false, clazz);
}
if (clazz.isAnnotationPresent(NamedQueries.class))
{
NamedQueries ann = (NamedQueries) clazz.getAnnotation(NamedQueries.class);
NamedQuery[] anns = ann.value();
for (NamedQuery a : anns)
{
appMetadata.addQueryToCollection(a.name(), a.query(), false, clazz);
}
}
if (clazz.isAnnotationPresent(NamedNativeQuery.class))
{
NamedNativeQuery ann = (NamedNativeQuery) clazz.getAnnotation(NamedNativeQuery.class);
appMetadata.addQueryToCollection(ann.name(), ann.query(), true, clazz);
}
if (clazz.isAnnotationPresent(NamedNativeQueries.class))
{
NamedNativeQueries ann = (NamedNativeQueries) clazz.getAnnotation(NamedNativeQueries.class);
NamedNativeQuery[] anns = ann.value();
for (NamedNativeQuery a : anns)
{
appMetadata.addQueryToCollection(a.name(), a.query(), true, clazz);
}
}
}
}
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