| /******************************************************************************* |
| * Copyright (c) 2001, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.j2ee.ejb.internal.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.jst.j2ee.ejb.CMPAttribute; |
| import org.eclipse.jst.j2ee.ejb.ContainerManagedEntity; |
| import org.eclipse.jst.j2ee.ejb.EJBExtensionFilter; |
| import org.eclipse.jst.j2ee.ejb.EnterpriseBean; |
| import org.eclipse.jst.j2ee.ejb.Entity; |
| import org.eclipse.jst.j2ee.internal.EjbModuleExtensionHelper; |
| import org.eclipse.jst.j2ee.internal.IEJBModelExtenderManager; |
| import org.eclipse.jst.j2ee.internal.J2EEVersionConstants; |
| |
| public abstract class ContainerManagedEntityFilter implements EJBExtensionFilter { |
| |
| private static ThreadLocal<CMPCache> _cache = new ThreadLocal<CMPCache>(); |
| |
| public List filter(ContainerManagedEntity cmp){ |
| List list = getCache(this, cmp); |
| if (list != null)return list; |
| |
| list = filterNotcached(cmp); |
| setCache(this, cmp, list); |
| return list; |
| } |
| |
| /** |
| * Subclasses that don't implement the filter method need to override this method |
| * to provided the filtered results. |
| */ |
| protected List filterNotcached(ContainerManagedEntity cmp){ |
| return new ArrayList(); |
| } |
| |
| /** |
| * All CMPAttributeFilters only operate on ContainerManagedEntityExtension |
| * objects. |
| */ |
| public List filter(EnterpriseBean ejb) { |
| if (ejb.isEntity() && ((Entity) ejb).isContainerManagedEntity()) return filter((ContainerManagedEntity) ejb); |
| return new ArrayList(); |
| } |
| |
| protected void filterRoleAttributesByName(List allAttributes, List roleAttributes) { |
| if (!roleAttributes.isEmpty()) { |
| int allSize, roleSize; |
| roleSize = roleAttributes.size(); |
| CMPAttribute roleAtt, allAtt; |
| for (int i = 0; i < roleSize; i++) { |
| roleAtt = (CMPAttribute) roleAttributes.get(i); |
| allSize = allAttributes.size(); |
| for (int j = allSize - 1; j != -1; j--) { |
| allAtt = (CMPAttribute) allAttributes.get(j); |
| if (roleAtt == allAtt || roleAtt.getName().equals(allAtt.getName())) { |
| allAttributes.remove(j); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| protected EjbModuleExtensionHelper getEjbModuleExtHelper(Object context) { |
| return IEJBModelExtenderManager.INSTANCE.getEJBModuleExtension(context); |
| } |
| |
| protected List getLocalRelationshipRoles(ContainerManagedEntity cmp) { |
| EjbModuleExtensionHelper modelExtender = null; |
| if (cmp.getVersionID() >= J2EEVersionConstants.EJB_2_0_ID) |
| return cmp.getRoles(); |
| else if ( (modelExtender = getEjbModuleExtHelper(cmp)) != null ){ |
| return modelExtender.getLocalRelationshipRoles_cmp11(cmp); |
| } |
| return Collections.EMPTY_LIST; |
| } |
| |
| protected List getRelationshipRoles(ContainerManagedEntity cmp) { |
| List roles = new ArrayList(); |
| collectRelationshipRoles(cmp, getEjbModuleExtHelper(cmp), roles); |
| return Collections.unmodifiableList(roles); |
| } |
| |
| public void collectRelationshipRoles(ContainerManagedEntity cmp, EjbModuleExtensionHelper extensionHelper, List containerList) { |
| if(cmp == null) |
| return; |
| containerList.addAll(getLocalRelationshipRoles(cmp)); |
| if(extensionHelper != null) |
| collectRelationshipRoles((ContainerManagedEntity) extensionHelper.getSuperType(cmp), extensionHelper, containerList); |
| } |
| |
| /** |
| * Clear the cache and turn off caching. |
| */ |
| public void clearCache(){ |
| if (_cache == null)return; |
| getCache().clear(); |
| getCache().setEnabled(false); |
| } |
| |
| |
| protected void setCache(ContainerManagedEntityFilter filter, ContainerManagedEntity cmp, List list) { |
| getCache().set(filter, cmp, list); |
| } |
| |
| |
| protected List getCache(ContainerManagedEntityFilter filter, ContainerManagedEntity cmp) { |
| return getCache().get(filter, cmp); |
| } |
| |
| /** |
| * Answer the CMPCache for this thread. |
| * @return |
| */ |
| private CMPCache getCache(){ |
| CMPCache cache = _cache.get(); |
| if (cache == null){ |
| cache = new CMPCache(); |
| _cache.set(cache); |
| } |
| return cache; |
| } |
| |
| /** |
| * This method needs to be called (with the parameter true) if you wish the |
| * filter results to be cached. By default the results are not cached. |
| * <p> |
| * The cache is thread based. When done the clearCache method should be called. |
| * |
| * @param isEnabled set this to true to have the filter results cached. |
| */ |
| public void enableCache(boolean isEnabled){ |
| getCache().setEnabled(isEnabled); |
| } |
| |
| /** |
| * Keep a thread local cache of filtered results. |
| * @author karasiuk |
| * |
| */ |
| private static class CMPCache { |
| |
| /* |
| * We discovered some very deep code paths when validating EJBs. In one example project that |
| * only had a few beans, it took 12 hours to validate. Keeping a cache during validation |
| * reduced the time to seconds. |
| */ |
| |
| private Map _map = new HashMap(30); |
| |
| /** Is the cache turned on, by default it is not. */ |
| private boolean _enabled; |
| |
| public void setEnabled(boolean isEnabled){ |
| _enabled = isEnabled; |
| } |
| |
| public List get(ContainerManagedEntityFilter filter, ContainerManagedEntity cmp) { |
| if (!_enabled)return null; |
| |
| Map map = (Map)_map.get(filter); |
| if (map == null){ |
| map = new HashMap(100); |
| _map.put(filter, map); |
| } |
| return (List)map.get(cmp); |
| } |
| |
| public void set(ContainerManagedEntityFilter filter, ContainerManagedEntity cmp, List list) { |
| if (!_enabled)return; |
| |
| Map map = (Map)_map.get(filter); |
| if (map == null){ |
| map = new HashMap(100); |
| _map.put(filter, map); |
| } |
| |
| map.put(cmp, list); |
| } |
| |
| public void clear(){ |
| _map.clear(); |
| } |
| |
| } |
| |
| } |