/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat, Inc. and/or its affiliates or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.search.cfg.impl;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Properties;
import org.hibernate.annotations.common.reflection.ReflectionManager;
import org.hibernate.annotations.common.reflection.java.JavaReflectionManager;
import org.hibernate.mapping.PersistentClass;
import org.hibernate.search.cfg.SearchMapping;
import org.hibernate.search.cfg.spi.SearchConfiguration;
import org.hibernate.search.cfg.spi.SearchConfigurationBase;
import org.hibernate.search.engine.impl.HibernateStatelessInitializer;
import org.hibernate.search.engine.service.classloading.spi.ClassLoaderService;
import org.hibernate.search.engine.service.spi.Service;
import org.hibernate.search.spi.InstanceInitializer;
/**
* Search configuration implementation wrapping an Hibernate Core configuration
*
* @author Emmanuel Bernard
*/
public class SearchConfigurationFromHibernateCore extends SearchConfigurationBase implements SearchConfiguration {
private final org.hibernate.cfg.Configuration cfg;
private final ClassLoaderService classLoaderService;
private ReflectionManager reflectionManager;
public SearchConfigurationFromHibernateCore(org.hibernate.cfg.Configuration cfg,
org.hibernate.boot.registry.classloading.spi.ClassLoaderService hibernateClassLoaderService) {
// hmm, not sure why we throw NullPointerExceptions from these sanity checks
// Shouldn't we use AssertionFailure or a log message + SearchException? (HF)
if ( cfg == null ) {
throw new NullPointerException( "Configuration is null" );
}
this.cfg = cfg;
if ( hibernateClassLoaderService == null ) {
throw new NullPointerException( "ClassLoaderService is null" );
}
this.classLoaderService = new DelegatingClassLoaderService( hibernateClassLoaderService );
}
@Override
public Iterator<Class<?>> getClassMappings() {
return new ClassIterator( cfg.getClassMappings() );
}
@Override
public Class<?> getClassMapping(String name) {
return cfg.getClassMapping( name ).getMappedClass();
}
@Override
public String getProperty(String propertyName) {
return cfg.getProperty( propertyName );
}
@Override
public Properties getProperties() {
return cfg.getProperties();
}
@Override
public ReflectionManager getReflectionManager() {
if ( reflectionManager == null ) {
try {
//TODO introduce a ReflectionManagerHolder interface to avoid reflection
//I want to avoid hard link between HAN and Search for such a simple need
//reuse the existing reflectionManager one when possible
reflectionManager =
(ReflectionManager) cfg.getClass().getMethod( "getReflectionManager" ).invoke( cfg );
}
catch (Exception e) {
reflectionManager = new JavaReflectionManager();
}
}
return reflectionManager;
}
@Override
public SearchMapping getProgrammaticMapping() {
return null;
}
@Override
public Map<Class<? extends Service>, Object> getProvidedServices() {
return Collections.emptyMap();
}
@Override
public InstanceInitializer getInstanceInitializer() {
return HibernateStatelessInitializer.INSTANCE;
}
@Override
public boolean isIndexMetadataComplete() {
return true;
}
@Override
public ClassLoaderService getClassLoaderService() {
return classLoaderService;
}
private static class ClassIterator implements Iterator<Class<?>> {
private Iterator hibernatePersistentClassIterator;
private Class<?> future;
private ClassIterator(Iterator hibernatePersistentClassIterator) {
this.hibernatePersistentClassIterator = hibernatePersistentClassIterator;
}
@Override
public boolean hasNext() {
//we need to read the next non null one. getMappedClass() can return null and should be ignored
if ( future != null ) {
return true;
}
do {
if ( !hibernatePersistentClassIterator.hasNext() ) {
future = null;
return false;
}
final PersistentClass pc = (PersistentClass) hibernatePersistentClassIterator.next();
future = pc.getMappedClass();
}
while ( future == null );
return true;
}
@Override
public Class<?> next() {
//run hasNext to init the next element
if ( !hasNext() ) {
throw new NoSuchElementException();
}
Class<?> result = future;
future = null;
return result;
}
@Override
public void remove() {
throw new UnsupportedOperationException( "Cannot modify Hibernate Core metadata" );
}
}
}