| /** |
| * 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.atlas.type; |
| |
| |
| import org.apache.atlas.AtlasErrorCode; |
| import org.apache.atlas.exception.AtlasBaseException; |
| import org.apache.atlas.model.typedef.AtlasRelationshipDef; |
| import org.apache.atlas.model.typedef.AtlasRelationshipDef.RelationshipCategory; |
| import org.apache.atlas.model.typedef.AtlasRelationshipEndPointDef; |
| import org.apache.atlas.model.typedef.AtlasStructDef.AtlasAttributeDef; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * class that implements behaviour of an relationship-type. |
| */ |
| public class AtlasRelationshipType extends AtlasStructType { |
| private static final Logger LOG = LoggerFactory.getLogger(AtlasRelationshipType.class); |
| |
| private final AtlasRelationshipDef relationshipDef; |
| |
| public AtlasRelationshipType(AtlasRelationshipDef relationshipDef) { |
| super(relationshipDef); |
| |
| this.relationshipDef = relationshipDef; |
| } |
| |
| public AtlasRelationshipType(AtlasRelationshipDef relationshipDef, AtlasTypeRegistry typeRegistry) throws AtlasBaseException { |
| super(relationshipDef); |
| |
| this.relationshipDef = relationshipDef; |
| |
| resolveReferences(typeRegistry); |
| } |
| public AtlasRelationshipDef getRelationshipDef() { return relationshipDef; } |
| |
| @Override |
| public void resolveReferences(AtlasTypeRegistry typeRegistry) throws AtlasBaseException { |
| super.resolveReferences(typeRegistry); |
| |
| validateAtlasRelationshipDef(this.relationshipDef); |
| } |
| |
| @Override |
| public boolean isValidValue(Object obj) { |
| boolean ret = true; |
| |
| if (obj != null) { |
| validateAtlasRelationshipType((AtlasRelationshipType) obj); |
| ret = super.isValidValue(obj); |
| } |
| |
| return ret; |
| } |
| |
| @Override |
| public boolean isValidValueForUpdate(Object obj) { |
| boolean ret = true; |
| |
| if (obj != null) { |
| validateAtlasRelationshipType((AtlasRelationshipType) obj); |
| ret = super.isValidValueForUpdate(obj); |
| } |
| |
| return ret; |
| } |
| /** |
| * Validate the fields in the the RelationshipType are consistent with respect to themselves. |
| * @param type |
| * @throws AtlasBaseException |
| */ |
| private boolean validateAtlasRelationshipType(AtlasRelationshipType type) { |
| boolean isValid = false; |
| try { |
| validateAtlasRelationshipDef(type.getRelationshipDef()); |
| isValid = true; |
| } catch (AtlasBaseException abe) { |
| LOG.error("Validation error for AtlasRelationshipType", abe); |
| } |
| return isValid; |
| } |
| |
| /** |
| * Throw an exception so we can junit easily. |
| * @param relationshipDef |
| * @throws AtlasBaseException |
| */ |
| public static void validateAtlasRelationshipDef(AtlasRelationshipDef relationshipDef) throws AtlasBaseException { |
| AtlasRelationshipEndPointDef endPointDef1 = relationshipDef.getEndPointDef1(); |
| AtlasRelationshipEndPointDef endPointDef2 = relationshipDef.getEndPointDef2(); |
| boolean isContainer1 = endPointDef1.getIsContainer(); |
| boolean isContainer2 = endPointDef2.getIsContainer(); |
| RelationshipCategory relationshipCategory = relationshipDef.getRelationshipCategory(); |
| String name = relationshipDef.getName(); |
| |
| if (isContainer1 && isContainer2) { |
| // we support 0 or 1 of these flags. |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_DOUBLE_CONTAINERS, name); |
| } |
| if ((isContainer1 || isContainer2)) { |
| // we have an isContainer defined in an endpoint |
| if (relationshipCategory == RelationshipCategory.ASSOCIATION) { |
| // associations are not containment relaitonships - so do not allow an endpoiint with isContainer |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_ASSOCIATION_AND_CONTAINER, name); |
| } |
| } else { |
| // we do not have an isContainer defined in an endpoint |
| if (relationshipCategory == RelationshipCategory.COMPOSITION) { |
| // COMPOSITION needs one endpoint to be the container. |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_COMPOSITION_NO_CONTAINER, name); |
| } else if (relationshipCategory == RelationshipCategory.AGGREGATION) { |
| // AGGREGATION needs one endpoint to be the container. |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_AGGREGATION_NO_CONTAINER, name); |
| } |
| } |
| if (relationshipCategory == RelationshipCategory.COMPOSITION) { |
| // composition containers should not be multiple cardinality |
| if (endPointDef1 != null && |
| endPointDef1.getCardinality() == AtlasAttributeDef.Cardinality.SET && |
| endPointDef1.getIsContainer()) { |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_COMPOSITION_SET_CONTAINER, name); |
| } |
| if (endPointDef2 != null && endPointDef2 != null && |
| endPointDef2.getCardinality() == AtlasAttributeDef.Cardinality.SET && |
| endPointDef2.getIsContainer()) { |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_COMPOSITION_SET_CONTAINER, name); |
| } |
| } |
| if ((endPointDef1 != null && endPointDef1.getCardinality() == AtlasAttributeDef.Cardinality.LIST) || |
| (endPointDef2 != null && endPointDef2.getCardinality() == AtlasAttributeDef.Cardinality.LIST)) { |
| throw new AtlasBaseException(AtlasErrorCode.RELATIONSHIPDEF_LIST_ON_ENDPOINT, name); |
| } |
| } |
| } |