| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.tuscany.das.ldap.schema.emf.destroy; |
| |
| import java.util.Map; |
| |
| import javax.naming.NamingEnumeration; |
| import javax.naming.NamingException; |
| import javax.naming.directory.Attributes; |
| import javax.naming.directory.BasicAttribute; |
| import javax.naming.directory.BasicAttributes; |
| import javax.naming.directory.DirContext; |
| import javax.naming.directory.SearchResult; |
| |
| import org.apache.tuscany.das.ldap.schema.constants.AttributeTypeConstants; |
| import org.eclipse.emf.ecore.EClass; |
| |
| /** |
| * The Class ECascadingObjectClassDestroyer. |
| * |
| * The purose of this class is to destroy a ObjectClass |
| * that is the parent of other ObjectClass entries. |
| * |
| * It first checks to see whether the EClass instance |
| * is a parent of other EClassifiers by examining |
| * whether the metaContext contains the EClass |
| * instance's name. |
| * |
| * If the EClass instance has an an metaContext child entry, |
| * then this instance is a parent of other EClassifiers. |
| * Therefore we check to see whether there are EClass |
| * instances left to delete that inherit from this EClass. |
| * |
| * If none are left we delete the parentMetaContext entry. |
| * If there are more children left, we leave the parentMetaContext |
| * entry in place and delete the children. |
| * |
| * If there is no parentMetaEntryContext, it means that this |
| * EClass instance does not have any children. Therefore it's |
| * safe to delete the corresponding ObjectClass. |
| */ |
| public class ECascadingObjectClassDestroyer |
| implements AttributeTypeConstants |
| { |
| |
| |
| public static void destroy( |
| Map<String, EClass> eClassNameToEClassMap, |
| DirContext metaContext, |
| DirContext attributeTypesContext, |
| DirContext objectClassesContext, |
| EClass eClass, |
| String oidPrefix) |
| throws NamingException, Exception |
| { |
| String rdn = |
| null; |
| DirContext eClassParentMetaContext = |
| null; |
| try |
| { |
| eClassParentMetaContext = |
| ( DirContext ) |
| metaContext. |
| lookup( CN + "=" + eClass.getName() ); |
| } |
| catch (Exception e) |
| { |
| //This eClass can be deleted, because it is not used a super class. |
| } |
| |
| if (eClassParentMetaContext == null) |
| { |
| EObjectClassDestroyer.destroy( |
| metaContext, |
| attributeTypesContext, |
| objectClassesContext, |
| eClass, |
| oidPrefix ); |
| } |
| else |
| { |
| Attributes searchAttributes = |
| new BasicAttributes(true); |
| |
| searchAttributes.put(new BasicAttribute(CN)); |
| |
| NamingEnumeration<SearchResult> childEntries = |
| eClassParentMetaContext.search("", searchAttributes); |
| |
| if (childEntries.hasMore()) |
| { |
| while (childEntries.hasMore()) |
| { |
| SearchResult childEntry = |
| childEntries.next(); |
| |
| Attributes childEntryAttributes = |
| childEntry.getAttributes(); |
| |
| String eClassName = |
| ( String ) |
| childEntryAttributes.get( CN ).get(); |
| |
| EClass childEClass = |
| eClassNameToEClassMap.get( eClassName ); |
| |
| destroy( |
| eClassNameToEClassMap, |
| metaContext, |
| attributeTypesContext, |
| objectClassesContext, |
| childEClass, |
| oidPrefix ); |
| |
| EObjectClassDestroyer.destroy( |
| metaContext, |
| attributeTypesContext, |
| objectClassesContext, |
| eClass, |
| oidPrefix ); |
| |
| rdn = CN + "=" + eClass.getName(); |
| metaContext.destroySubcontext( rdn ); |
| } |
| } |
| } |
| } |
| } |