diff options
Diffstat (limited to 'das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/schema/emf/destroy/ECascadingObjectClassDestroyer.java')
| -rw-r--r-- | das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/schema/emf/destroy/ECascadingObjectClassDestroyer.java | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/schema/emf/destroy/ECascadingObjectClassDestroyer.java b/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/schema/emf/destroy/ECascadingObjectClassDestroyer.java new file mode 100644 index 0000000000..1ad3a1eb21 --- /dev/null +++ b/das-java/contrib/ldap/das.ldap/src/main/java/org/apache/tuscany/das/ldap/schema/emf/destroy/ECascadingObjectClassDestroyer.java @@ -0,0 +1,145 @@ +/* + * 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 ); + } + } + } + } +}
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