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/*******************************************************************************
* Copyright (c) 2001, 2006 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.List;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.jem.java.JavaHelpers;
import org.eclipse.jst.j2ee.ejb.CMPAttribute;
import org.eclipse.jst.j2ee.ejb.CommonRelationshipRole;
import org.eclipse.jst.j2ee.ejb.ContainerManagedEntity;
import org.eclipse.jst.j2ee.ejb.EjbPackage;
import org.eclipse.jst.j2ee.ejb.IRoleShapeStrategy;
/**
* Insert the type's description here.
* Creation date: (11/6/2000 11:41:33 AM)
* @author: Administrator
*/
public class EJB20FlattenedRoleShapeStrategy extends RoleShapeStrategy {
/**
* FlattenedRoleShapeStrategy constructor comment.
*/
public EJB20FlattenedRoleShapeStrategy(CommonRelationshipRole aRole) {
super(aRole);
}
@Override
protected boolean canContinue() {
return !busy && role.getName() != null && (role.isForward() ||
(role.isMany() && (role.getOppositeAsCommonRole() == null ||
role.getOppositeAsCommonRole().isMany())));
}
public boolean usesAttributeNamed(String attributeName) {
if (attributeName != null) {
int index = attributeName.indexOf(IRoleShapeStrategy.ATTRIBUTE_NAME_JOINER);
String name = attributeName.substring(0, index);
return getRole().getName().equals(name);
}
return false;
}
/**
* @see RoleShapeStrategy#reconcileAttributes(CommonRelationshipRole, String, List, List)
*/
@Override
protected void reconcileAttributes(CommonRelationshipRole aRole, String attributeName, List aList, List computedNames) {
Resource res = aRole.eResource();
boolean dirtyFlag = res != null ? res.isModified() : false;
try {
if (aRole.getOppositeAsCommonRole() != null) {
ContainerManagedEntity entity = aRole.getOppositeAsCommonRole().getSourceEntity();
// ContainerManagedEntityExtension roleType = (ContainerManagedEntityExtension)getTypeExtension(aRole);
if (entity != null)
collectAttributes(entity, attributeName, aList, computedNames);
}
} finally {
if (res != null)
res.setModified(dirtyFlag);
}
}
/**
* @see com.ibm.ejs.models.base.extensions.ejbext.impl.FlattenedRoleShapeStrategy#setDerivedAttributeType(CMPAttribute, JavaHelpers)
*/
protected void setDerivedAttributeType(CMPAttribute attribute, CMPAttribute targetAttribute, boolean isNew) {
if (targetAttribute == null) return;
JavaHelpers fieldType = targetAttribute.getType();
if (fieldType != null) {
int singleRoleNameSize = getRole().getName().length() + targetAttribute.getName().length() + 1; //one for the underscore
if (!(attribute.getName().length() > singleRoleNameSize)) //don't set the originating type since we are derived from another derived attribute
attribute.setOriginatingType(fieldType);
attribute.setEType(fieldType.getWrapper());
}
if (isNew && !getRole().isKey())
attribute.setDerived(true);
}
/**
* getFields method comment.
*/
protected void collectAttributes(ContainerManagedEntity type, String attributeName, List aList, List computedNames) {
collectKeyModelledAttributes(type, attributeName, aList, computedNames);
collectKeyRoleAttributes(type, attributeName, aList, computedNames);
}
/**
* @deprecated to be safe, really should use collectAttributes(ContainerManagedEntity entity, CMPAttribute type, String attributeName, List aList, List computedNames)
* @param type
* @param attributeName
* @param aList
* @param computedNames
*/
protected void collectAttributes(CMPAttribute type, String attributeName, List aList, List computedNames) {
// This is necessary for code generation
ContainerManagedEntity entity = (ContainerManagedEntity) type.eContainer();
collectAttributes(entity, type, attributeName, aList, computedNames);
}
/**
*
*/
protected void collectAttributes(ContainerManagedEntity entity, CMPAttribute type, String attributeName, List aList, List computedNames) {
boolean isNewAttribute = false;
attributeName = appendName(attributeName, type.getName());
computedNames.add(attributeName);
CMPAttribute attribute = getCMPEntity().getPersistentAttribute(attributeName);
if (attribute == null) {
attribute = createPersistentAttribute(attributeName);
isNewAttribute = true;
}
if (entity != null)
setDerivedAttributeType(attribute, type, isNewAttribute);
if (isNewAttribute) {
if (getRole().isKey())
getCMPEntity().getKeyAttributes().add(attribute);
aList.add(attribute);
getCMPEntity().getPersistentAttributes().add(attribute);
} else {
if (!aList.contains(attribute))
aList.add(attribute);
}
}
protected CMPAttribute createPersistentAttribute(String aName) {
CMPAttribute attribute = ((EjbPackage)EPackage.Registry.INSTANCE.getEPackage(EjbPackage.eNS_URI)).getEjbFactory().createCMPAttribute();
attribute.setName(aName);
attribute.setDescription("Generated to support relationships. Do NOT delete.");
return attribute;
}
/**
* getFields method comment.
*/
protected void collectKeyModelledAttributes(ContainerManagedEntity entity, String attributeName, List aList, List computedNames) {
java.util.Iterator it = entity.getFilteredFeatures(ModelledKeyAttributeFilter.singleton()).iterator();
CMPAttribute attribute;
while (it.hasNext()) {
attribute = (CMPAttribute) it.next();
collectAttributes(entity, attribute, attributeName, aList, computedNames);
}
}
/**
* getFields method comment.
*/
protected void collectKeyRoleAttributes(ContainerManagedEntity entity, String attributeName, List aList, List computedNames) {
if(visitedKeyTypes.contains(entity)){
throw new RuntimeException("Key role cycle detected");
}
visitedKeyTypes.add(entity);
java.util.Iterator it = entity.getFilteredFeatures(KeyRelationshipRoleFilter.singleton()).iterator();
CommonRelationshipRole aRole;
while (it.hasNext()) {
aRole = (CommonRelationshipRole) it.next();
String attName = appendName(attributeName, aRole.getName());
reconcileAttributes(aRole, attName, aList, computedNames);
}
}
protected ContainerManagedEntity getCMPEntity() {
return getRole().getSourceEntity();
}
}
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