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Provides GeDA core integration for Spring framework
/*
* This code is distributed under The GNU Lesser General Public License (LGPLv3)
* Please visit GNU site for LGPLv3 http://www.gnu.org/copyleft/lesser.html
*
* Copyright Denis Pavlov 2009
* Web: http://www.inspire-software.com
* SVN: https://geda-genericdto.svn.sourceforge.net/svnroot/geda-genericdto
*/
package com.inspiresoftware.lib.dto.geda.impl;
import com.inspiresoftware.lib.dto.geda.DTOAdaptersRegistrar;
import com.inspiresoftware.lib.dto.geda.DTODSLRegistrar;
import com.inspiresoftware.lib.dto.geda.DTOSupport;
import com.inspiresoftware.lib.dto.geda.adapter.BeanFactory;
import com.inspiresoftware.lib.dto.geda.adapter.ExtensibleBeanFactory;
import com.inspiresoftware.lib.dto.geda.adapter.repository.AdaptersRepository;
import com.inspiresoftware.lib.dto.geda.adapter.repository.impl.AdaptersRepositoryImpl;
import com.inspiresoftware.lib.dto.geda.annotations.Dto;
import com.inspiresoftware.lib.dto.geda.assembler.Assembler;
import com.inspiresoftware.lib.dto.geda.assembler.DTOAssembler;
import com.inspiresoftware.lib.dto.geda.assembler.dsl.Registry;
import com.inspiresoftware.lib.dto.geda.assembler.dsl.impl.DefaultDSLRegistry;
import com.inspiresoftware.lib.dto.geda.event.DTOEventListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.CollectionUtils;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Basic implementation of the DTOSupport interface that provides the connection point
* between Spring AOP and the GeDA assembler worlds.
*
* This particular implementation supports the following context listeners:
* onDtoAssembly - fired just before transfer takes place
* onEntityAssembly - fired just before transfer takes place
* onDtoAssembled - fired immediately after assembly
* onDtoFailed - fired immediately after failed assembly
* onEntityAssembled - fired immediately after assembly
* onEntityFailed - fired immediately after failed assembly
*
* All event listeners provided with the following context:
* listener.onEvent(context, DTO, Entity [, Throwable])
*
*
* User: denispavlov
* Date: Sep 27, 2011
* Time: 5:33:05 PM
*/
public class DTOSupportImpl implements DTOSupport, InitializingBean {
private static final Logger LOG = LoggerFactory.getLogger(DTOSupportImpl.class);
private BeanFactory beanFactory;
private DTOAdaptersRegistrar adaptersRegistrar;
private DTODSLRegistrar dslRegistrar;
private final AdaptersRepository dtoValueConverters = new AdaptersRepositoryImpl();
private Registry dslRegistry = new DefaultDSLRegistry();
private DTOEventListener onDtoAssembly;
private DTOEventListener onEntityAssembly;
private DTOEventListener onDtoAssembled;
private DTOEventListener onDtoFailed;
private DTOEventListener onEntityAssembled;
private DTOEventListener onEntityFailed;
private final Map isClassAnnotatedCache = new ConcurrentHashMap();
public void setBeanFactory(final ExtensibleBeanFactory beanFactory) {
this.beanFactory = beanFactory;
this.dslRegistry = new DefaultDSLRegistry(beanFactory);
}
public void setAdaptersRegistrar(final DTOAdaptersRegistrar adaptersRegistrar) {
this.adaptersRegistrar = adaptersRegistrar;
}
public void setDslRegistrar(final DTODSLRegistrar dslRegistrar) {
this.dslRegistrar = dslRegistrar;
}
public void afterPropertiesSet() throws Exception {
this.registerCoreAdapters();
this.registerDSLMappings();
}
/**
* Extension hook to register mappings via DSL registry immediately after
* bean construction.
*/
protected void registerDSLMappings() {
if (this.dslRegistrar != null) {
this.dslRegistrar.registerMappings(this, this.dslRegistry);
}
}
/**
* Extension hook to register converters, retrievers and matchers immediately after
* bean construction.
*/
protected void registerCoreAdapters() {
if (this.adaptersRegistrar != null) {
this.adaptersRegistrar.registerAdapters(this);
}
}
/** {@inheritDoc} */
public T assembleDto(final T dto, final Object entity, final String context) {
return assembleDto(null, dto, entity, context);
}
/** {@inheritDoc} */
public T assembleDtoByKey(final String dtoKey, final Object entity, final String context) {
final Object dto = this.beanFactory.get(dtoKey);
if (dto == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + dtoKey);
}
return (T) assembleDto(null, dto, entity, context);
}
/** {@inheritDoc} */
public T assembleDto(final String dtoFilter, final T dto, final Object entity, final String context) {
final Class dtoClassFilter;
if (dtoFilter == null) {
dtoClassFilter = dto.getClass();
} else {
dtoClassFilter = this.beanFactory.getClazz(dtoFilter);
if (dtoClassFilter == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + dtoFilter);
}
}
try {
if (this.onDtoAssembly != null) {
this.onDtoAssembly.onEvent(context, dto, entity);
}
if (isAnnotatedClass(dtoClassFilter)) {
DTOAssembler.newAssembler(dtoClassFilter, entity.getClass())
.assembleDto(dto, entity, this.dtoValueConverters.getAll(), this.beanFactory);
} else {
DTOAssembler.newAssembler(dtoClassFilter, entity.getClass(), dslRegistry)
.assembleDto(dto, entity, this.dtoValueConverters.getAll(), this.beanFactory);
}
if (this.onDtoAssembled != null) {
this.onDtoAssembled.onEvent(context, dto, entity);
}
return dto;
} catch (final RuntimeException re) {
if (this.onDtoFailed != null) {
this.onDtoFailed.onEvent(context, dto, entity, re);
LOG.error("Exception skipped by event listener", re);
return null;
}
throw re; // re-throw
}
}
/** {@inheritDoc} */
public T assembleDtoByKey(final String dtoFilter, final String dtoKey, final Object entity, final String context) {
final Object dto = this.beanFactory.get(dtoKey);
if (dto == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + dtoKey);
}
return (T) assembleDto(dtoFilter, dto, entity, context);
}
/** {@inheritDoc} */
public void assembleDtos(final String keyDto, final Collection dtos, final Collection entities, final String context) {
assembleDtos(null, keyDto, dtos, entities, context);
}
/** {@inheritDoc} */
public void assembleDtos(final String dtoFilter, final String keyDto,
final Collection dtos, final Collection entities, final String context) {
if (!CollectionUtils.isEmpty(entities)) {
final Class dtoClassFilter;
if (dtoFilter == null) {
dtoClassFilter = this.beanFactory.getClazz(keyDto);
if (dtoClassFilter == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + keyDto);
}
} else {
dtoClassFilter = this.beanFactory.getClazz(dtoFilter);
if (dtoClassFilter == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + dtoFilter);
}
}
final Class entityClass = entities.iterator().next().getClass();
final Assembler asm;
if (isAnnotatedClass(dtoClassFilter)) {
asm = DTOAssembler.newAssembler(dtoClassFilter, entityClass);
} else {
asm = DTOAssembler.newAssembler(dtoClassFilter, entityClass, dslRegistry);
}
for (final Object entity : entities) {
final Object dto = this.beanFactory.get(keyDto);
if (dto == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + keyDto);
}
try {
if (this.onDtoAssembly != null) {
this.onDtoAssembly.onEvent(context, dto, entity);
}
asm.assembleDto(dto, entity, this.dtoValueConverters.getAll(), this.beanFactory);
dtos.add((T) dto);
if (this.onDtoAssembled != null) {
this.onDtoAssembled.onEvent(context, dto, entity);
}
} catch (final RuntimeException re) {
if (this.onDtoFailed != null) {
this.onDtoFailed.onEvent(context, dto, entity, re);
LOG.error("Exception skipped by event listener", re);
continue;
}
throw re; // re-throw
}
}
}
}
/** {@inheritDoc} */
public T assembleEntity(final Object dto, final T entity, final String context) {
return assembleEntity(null, dto, entity, context);
}
/** {@inheritDoc} */
public T assembleEntityByKey(final Object dto, final String entityKey, final String context) {
final Object entity = this.beanFactory.get(entityKey);
if (entity == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + entityKey);
}
return (T) assembleEntity(null, dto, entity, context);
}
/** {@inheritDoc} */
public T assembleEntityByKey(final String dtoFilter, final Object dto, final String entityKey, final String context) {
final Object entity = this.beanFactory.get(entityKey);
if (entity == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + entityKey);
}
return (T) assembleEntity(dtoFilter, dto, entity, context);
}
/** {@inheritDoc} */
public T assembleEntity(final String dtoFilter, final Object dto, final T entity, final String context) {
final Class dtoClassFilter;
if (dtoFilter == null) {
dtoClassFilter = dto.getClass();
} else {
dtoClassFilter = this.beanFactory.getClazz(dtoFilter);
if (dtoClassFilter == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + dtoFilter);
}
}
try {
if (this.onEntityAssembly != null) {
this.onEntityAssembly.onEvent(context, dto, entity);
}
if (isAnnotatedClass(dtoClassFilter)) {
DTOAssembler.newAssembler(dtoClassFilter, entity.getClass())
.assembleEntity(dto, entity, this.dtoValueConverters.getAll(), this.beanFactory);
} else {
DTOAssembler.newAssembler(dtoClassFilter, entity.getClass(), dslRegistry)
.assembleEntity(dto, entity, this.dtoValueConverters.getAll(), this.beanFactory);
}
if (this.onEntityAssembled != null) {
this.onEntityAssembled.onEvent(context, dto, entity);
}
return entity;
} catch (final RuntimeException re) {
if (this.onEntityFailed != null) {
this.onEntityFailed.onEvent(context, dto, entity, re);
LOG.error("Exception skipped by event listener", re);
return null;
}
throw re; // re-throw
}
}
/** {@inheritDoc} */
public void assembleEntities(final String entityKey, final Collection dtos, final Collection entities, final String context) {
assembleEntities(null, entityKey, dtos, entities, context);
}
/** {@inheritDoc} */
public void assembleEntities(final String dtoFilter, final String entityKey,
final Collection dtos, final Collection entities, final String context) {
if (!CollectionUtils.isEmpty(dtos)) {
final Class dtoClassFilter;
if (dtoFilter == null) {
dtoClassFilter = dtos.iterator().next().getClass();
} else {
dtoClassFilter = this.beanFactory.getClazz(dtoFilter);
if (dtoClassFilter == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + dtoFilter);
}
}
final Class entityClass = this.beanFactory.getClazz(entityKey);
if (entityClass == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + entityKey);
}
final Assembler asm;
if (isAnnotatedClass(dtoClassFilter)) {
asm = DTOAssembler.newAssembler(dtoClassFilter, entityClass);
} else {
asm = DTOAssembler.newAssembler(dtoClassFilter, entityClass, dslRegistry);
}
for (final Object dto : dtos) {
final Object entity = this.beanFactory.get(entityKey);
if (entity == null) {
throw new IllegalArgumentException("DTO factory has no class specified for key: " + entityKey);
}
try {
if (this.onEntityAssembly != null) {
this.onEntityAssembly.onEvent(context, dto, entity);
}
asm.assembleEntity(dto, entity, this.dtoValueConverters.getAll(), this.beanFactory);
entities.add((T) entity);
if (this.onEntityAssembled != null) {
this.onEntityAssembled.onEvent(context, dto, entity);
}
} catch (final RuntimeException re) {
if (this.onEntityFailed != null) {
this.onEntityFailed.onEvent(context, dto, entity, re);
LOG.error("Exception skipped by event listener", re);
continue;
}
throw re; // re-throw
}
}
}
}
/** {@inheritDoc} */
public void registerAdapter(final String key, final Object converter) {
LOG.debug("Registering [{}] with key [{}]", converter, key);
this.dtoValueConverters.registerAdapter(key, converter);
}
/**
* @param onDtoAssembled listener invoked after assembly
*/
public void setOnDtoAssembled(final DTOEventListener onDtoAssembled) {
this.onDtoAssembled = onDtoAssembled;
}
/**
* @param onDtoFailed listener invoked after failed assembly
*/
public void setOnDtoFailed(final DTOEventListener onDtoFailed) {
this.onDtoFailed = onDtoFailed;
}
/**
* @param onEntityAssembled listener invoked after assembly
*/
public void setOnEntityAssembled(final DTOEventListener onEntityAssembled) {
this.onEntityAssembled = onEntityAssembled;
}
/**
* @param onEntityFailed listener
*/
public void setOnEntityFailed(final DTOEventListener onEntityFailed) {
this.onEntityFailed = onEntityFailed;
}
/**
* @param onDtoAssembly listener invoked before assembly
*/
public void setOnDtoAssembly(final DTOEventListener onDtoAssembly) {
this.onDtoAssembly = onDtoAssembly;
}
/**
* @param onEntityAssembly listener invoked before assembly
*/
public void setOnEntityAssembly(final DTOEventListener onEntityAssembly) {
this.onEntityAssembly = onEntityAssembly;
}
private Boolean isAnnotatedClass(final Class clazz) {
final Integer classHash = Integer.valueOf(clazz.hashCode());
Boolean isAnn;
if (isClassAnnotatedCache.containsKey(classHash)) {
isAnn = isClassAnnotatedCache.get(classHash);
} else {
isAnn = Boolean.valueOf(clazz.getAnnotation(Dto.class) != null);
isClassAnnotatedCache.put(classHash, isAnn);
}
return isAnn;
}
}
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