| /** |
| * 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.repository.memory; |
| |
| import com.google.common.collect.ImmutableCollection; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.atlas.AtlasException; |
| import org.apache.atlas.typesystem.ITypedReferenceableInstance; |
| import org.apache.atlas.typesystem.persistence.Id; |
| import org.apache.atlas.typesystem.types.DataTypes; |
| import org.apache.atlas.typesystem.types.Multiplicity; |
| import org.apache.atlas.typesystem.types.ObjectGraphWalker; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| public class ReplaceIdWithInstance implements ObjectGraphWalker.NodeProcessor { |
| |
| public final Map<Id, ITypedReferenceableInstance> idToInstanceMap; |
| final MemRepository repository; |
| ObjectGraphWalker walker; |
| |
| public ReplaceIdWithInstance(MemRepository repository) { |
| this.repository = repository; |
| idToInstanceMap = new HashMap<>(); |
| } |
| |
| void setWalker(ObjectGraphWalker walker) { |
| this.walker = walker; |
| } |
| |
| @Override |
| public void processNode(ObjectGraphWalker.Node nd) throws AtlasException { |
| if (nd.attributeName != null) { |
| if (nd.aInfo.isComposite && nd.value != null) { |
| if (nd.aInfo.dataType().getTypeCategory() == DataTypes.TypeCategory.CLASS) { |
| if (nd.value instanceof Id) { |
| Id id = (Id) nd.value; |
| ITypedReferenceableInstance r = getInstance(id); |
| nd.instance.set(nd.attributeName, r); |
| } |
| } else if (nd.aInfo.dataType().getTypeCategory() == DataTypes.TypeCategory.ARRAY) { |
| DataTypes.ArrayType aT = (DataTypes.ArrayType) nd.aInfo.dataType(); |
| nd.instance.set(nd.attributeName, |
| convertToInstances((ImmutableCollection) nd.value, nd.aInfo.multiplicity, aT)); |
| } else if (nd.aInfo.dataType().getTypeCategory() == DataTypes.TypeCategory.MAP) { |
| DataTypes.MapType mT = (DataTypes.MapType) nd.aInfo.dataType(); |
| nd.instance.set(nd.attributeName, convertToInstances((ImmutableMap) nd.value, nd.aInfo.multiplicity, mT)); |
| } |
| } |
| } |
| } |
| |
| ImmutableCollection<?> convertToInstances(ImmutableCollection<?> val, Multiplicity m, DataTypes.ArrayType arrType) |
| throws AtlasException { |
| |
| if (val == null || arrType.getElemType().getTypeCategory() != DataTypes.TypeCategory.CLASS) { |
| return val; |
| } |
| |
| ImmutableCollection.Builder b = m.isUnique ? ImmutableSet.builder() : ImmutableList.builder(); |
| for (Object elem : val) { |
| if (elem instanceof Id) { |
| Id id = (Id) elem; |
| elem = getInstance(id); |
| } |
| |
| b.add(elem); |
| |
| } |
| return b.build(); |
| } |
| |
| ImmutableMap<?, ?> convertToInstances(ImmutableMap val, Multiplicity m, DataTypes.MapType mapType) |
| throws AtlasException { |
| |
| if (val == null || (mapType.getKeyType().getTypeCategory() != DataTypes.TypeCategory.CLASS |
| && mapType.getValueType().getTypeCategory() != DataTypes.TypeCategory.CLASS)) { |
| return val; |
| } |
| ImmutableMap.Builder b = ImmutableMap.builder(); |
| for (Map.Entry elem : (Iterable<Map.Entry>) val.entrySet()) { |
| Object oldKey = elem.getKey(); |
| Object oldValue = elem.getValue(); |
| Object newKey = oldKey; |
| Object newValue = oldValue; |
| |
| if (oldKey instanceof Id) { |
| Id id = (Id) elem; |
| ITypedReferenceableInstance r = getInstance(id); |
| } |
| |
| if (oldValue instanceof Id) { |
| Id id = (Id) elem; |
| ITypedReferenceableInstance r = getInstance(id); |
| } |
| |
| b.put(newKey, newValue); |
| } |
| return b.build(); |
| } |
| |
| ITypedReferenceableInstance getInstance(Id id) throws AtlasException { |
| |
| ITypedReferenceableInstance r = idToInstanceMap.get(id); |
| if (r == null) { |
| r = repository.get(id); |
| idToInstanceMap.put(id, r); |
| walker.addRoot(r); |
| } |
| return r; |
| } |
| } |