/*
* 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.genericdtoassembler.org
* SVN: https://svn.code.sf.net/p/geda-genericdto/code/trunk/
* SVN (mirror): http://geda-genericdto.googlecode.com/svn/trunk/
*/
package com.inspiresoftware.lib.dto.geda.interceptor;
import com.inspiresoftware.lib.dto.geda.DTOSupport;
import com.inspiresoftware.lib.dto.geda.annotations.Occurrence;
import com.inspiresoftware.lib.dto.geda.config.GeDAInfrastructure;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.CollectionUtils;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Map;
/**
* The workhorse of the whole enterprise - interceptor that will use dto support facade
* in order to enrich DTO/Entities whist method invocation takes place.
* <p/>
* User: denispavlov
* Date: Jan 25, 2012
* Time: 8:03:32 PM
*/
public class GeDAInterceptor implements MethodInterceptor, GeDAInfrastructure {
private static final Logger LOG = LoggerFactory.getLogger(GeDAInterceptor.class);
private DTOSupport support;
private AdviceConfigResolver resolver;
public GeDAInterceptor() {
}
public void setSupport(final DTOSupport support) {
this.support = support;
}
public void setResolver(final AdviceConfigResolver resolver) {
this.resolver = resolver;
}
/** {@inheritDoc} */
public Object invoke(final MethodInvocation invocation) throws Throwable {
final Method method = invocation.getMethod();
final Class<?> targetClass = (invocation.getThis() != null ? invocation.getThis().getClass() : null);
final Map<Occurrence, AdviceConfig> cfg = this.resolver.resolve(method, targetClass);
if (CollectionUtils.isEmpty(cfg)) {
if (LOG.isDebugEnabled()) {
LOG.debug("skipping method {} because it is not advised", invocation.getMethod());
}
return invocation.proceed(); // unadvised
}
final Object[] args = invocation.getArguments();
if (cfg.containsKey(Occurrence.BEFORE_METHOD_INVOCATION)) {
final AdviceConfig configuration = cfg.get(Occurrence.BEFORE_METHOD_INVOCATION);
if (LOG.isDebugEnabled()) {
LOG.debug("performing transfer in mode {} before invocation of {} ",
configuration.getDtoSupportMode().name(), invocation.getMethod());
}
this.invokeTransferBefore(args, configuration);
}
final Object result = invocation.proceed();
if (cfg.containsKey(Occurrence.AFTER_METHOD_INVOCATION)) {
final AdviceConfig configuration = cfg.get(Occurrence.AFTER_METHOD_INVOCATION);
if (LOG.isDebugEnabled()) {
LOG.debug("performing transfer in mode {} after invocation of {}",
configuration.getDtoSupportMode().name(), invocation.getMethod());
}
return this.invokeTransferAfter(args, result, configuration);
}
return result;
}
/**
* Perform actual assembly of the DTO/Entity
*
* @param args current invocation arguments
* @param cfg configuration mode
*/
protected void invokeTransferBefore(final Object[] args,
final AdviceConfig cfg) {
final AdviceConfig.DTOSupportMode mode = cfg.getDtoSupportMode();
switch (mode) {
case DTO_TO_ENTITY:
this.support.assembleEntity(args[cfg.getDtoSourceIndex()], args[cfg.getEntityTargetIndex()], cfg.getContext());
break;
case DTO_TO_ENTITY_KEY:
this.support.assembleEntityByKey(args[cfg.getDtoSourceIndex()], cfg.getEntityKey(), cfg.getContext());
break;
case DTO_BY_FILTER_TO_ENTITY:
this.support.assembleEntity(cfg.getDtoFilterKey(),
args[cfg.getDtoSourceIndex()], args[cfg.getEntityTargetIndex()], cfg.getContext());
break;
case DTO_BY_FILTER_TO_ENTITY_KEY:
this.support.assembleEntityByKey(cfg.getDtoFilterKey(),
args[cfg.getDtoSourceIndex()], cfg.getEntityKey(), cfg.getContext());
break;
case DTOS_TO_ENTITIES:
this.support.assembleEntities(cfg.getEntityKey(),
(Collection) args[cfg.getDtoSourceIndex()], (Collection) args[cfg.getEntityTargetIndex()], cfg.getContext());
break;
case DTOS_TO_ENTITIES_BY_FILTER:
this.support.assembleEntities(cfg.getDtoFilterKey(), cfg.getEntityKey(),
(Collection) args[cfg.getDtoSourceIndex()], (Collection) args[cfg.getEntityTargetIndex()], cfg.getContext());
break;
case ENTITY_TO_DTO:
this.support.assembleDto(args[cfg.getDtoTargetIndex()], args[cfg.getEntitySourceIndex()], cfg.getContext());
break;
case ENTITY_TO_DTO_KEY:
this.support.assembleDtoByKey(cfg.getDtoKey(), args[cfg.getEntitySourceIndex()], cfg.getContext());
break;
case ENTITY_TO_DTO_BY_FILTER:
this.support.assembleDto(cfg.getDtoFilterKey(),
args[cfg.getDtoTargetIndex()], args[cfg.getEntitySourceIndex()], cfg.getContext());
break;
case ENTITY_TO_DTO_KEY_BY_FILTER:
this.support.assembleDtoByKey(cfg.getDtoFilterKey(),
cfg.getDtoKey(), args[cfg.getEntitySourceIndex()], cfg.getContext());
break;
case ENTITIES_TO_DTOS:
this.support.assembleDtos(cfg.getDtoKey(),
(Collection) args[cfg.getDtoTargetIndex()], (Collection) args[cfg.getEntitySourceIndex()], cfg.getContext());
break;
case ENTITIES_TO_DTOS_BY_FILTER:
this.support.assembleDtos(cfg.getDtoFilterKey(), cfg.getDtoKey(),
(Collection) args[cfg.getDtoTargetIndex()], (Collection) args[cfg.getEntitySourceIndex()], cfg.getContext());
break;
default:
LOG.warn("Unknown support mode [{}]", cfg);
break;
}
}
/**
* Perform actual assembly of the DTO/Entity
*
* @param args current invocation arguments
* @param result result of the method invocation
* @param cfg configuration mode
*/
protected Object invokeTransferAfter(final Object[] args,
final Object result,
final AdviceConfig cfg) {
final AdviceConfig.DTOSupportMode mode = cfg.getDtoSupportMode();
switch (mode) {
case DTO_TO_ENTITY:
if (cfg.getEntityTargetIndex() == -1) {
return this.support.assembleEntity(args[cfg.getDtoSourceIndex()], result, cfg.getContext());
} else {
this.support.assembleEntity(args[cfg.getDtoSourceIndex()], args[cfg.getEntityTargetIndex()], cfg.getContext());
return result;
}
case DTO_TO_ENTITY_KEY:
return this.support.assembleEntityByKey(args[cfg.getDtoSourceIndex()], cfg.getEntityKey(), cfg.getContext());
case DTO_BY_FILTER_TO_ENTITY:
if (cfg.getEntityTargetIndex() == -1) {
return this.support.assembleEntity(cfg.getDtoFilterKey(),
args[cfg.getDtoSourceIndex()], result, cfg.getContext());
} else {
this.support.assembleEntity(cfg.getDtoFilterKey(),
args[cfg.getDtoSourceIndex()], args[cfg.getEntityTargetIndex()], cfg.getContext());
return result;
}
case DTO_BY_FILTER_TO_ENTITY_KEY:
return this.support.assembleEntityByKey(cfg.getDtoFilterKey(),
args[cfg.getDtoSourceIndex()], cfg.getEntityKey(), cfg.getContext());
case DTOS_TO_ENTITIES:
this.support.assembleEntities(cfg.getEntityKey(),
(Collection) args[cfg.getDtoSourceIndex()], (Collection) args[cfg.getEntityTargetIndex()], cfg.getContext());
return result;
case DTOS_TO_ENTITIES_BY_FILTER:
this.support.assembleEntities(cfg.getDtoFilterKey(), cfg.getEntityKey(),
(Collection) args[cfg.getDtoSourceIndex()], (Collection) args[cfg.getEntityTargetIndex()], cfg.getContext());
return result;
case ENTITY_TO_DTO:
if (cfg.getDtoTargetIndex() == -1) {
return this.support.assembleDto(result, args[cfg.getEntitySourceIndex()], cfg.getContext());
} else {
this.support.assembleDto(args[cfg.getDtoTargetIndex()], args[cfg.getEntitySourceIndex()], cfg.getContext());
return result;
}
case ENTITY_TO_DTO_KEY:
return this.support.assembleDtoByKey(cfg.getDtoKey(), args[cfg.getEntitySourceIndex()], cfg.getContext());
case ENTITY_TO_DTO_BY_FILTER:
if (cfg.getDtoTargetIndex() == -1) {
return this.support.assembleDto(cfg.getDtoFilterKey(),
result, args[cfg.getEntitySourceIndex()], cfg.getContext());
} else {
this.support.assembleDto(cfg.getDtoFilterKey(),
args[cfg.getDtoTargetIndex()], args[cfg.getEntitySourceIndex()], cfg.getContext());
return result;
}
case ENTITY_TO_DTO_KEY_BY_FILTER:
return this.support.assembleDtoByKey(cfg.getDtoFilterKey(),
cfg.getDtoKey(), args[cfg.getEntitySourceIndex()], cfg.getContext());
case ENTITIES_TO_DTOS:
this.support.assembleDtos(cfg.getDtoKey(),
(Collection) args[cfg.getDtoTargetIndex()], (Collection) args[cfg.getEntitySourceIndex()], cfg.getContext());
return result;
case ENTITIES_TO_DTOS_BY_FILTER:
this.support.assembleDtos(cfg.getDtoFilterKey(), cfg.getDtoKey(),
(Collection) args[cfg.getDtoTargetIndex()], (Collection) args[cfg.getEntitySourceIndex()], cfg.getContext());
return result;
default:
LOG.warn("Unknown support mode [{}]", cfg);
return result;
}
}
}