| /** |
| * 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.ImmutableBiMap; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Lists; |
| import org.apache.atlas.repository.RepositoryException; |
| import org.apache.atlas.typesystem.persistence.Id; |
| import org.apache.atlas.typesystem.persistence.ReferenceableInstance; |
| import org.apache.atlas.typesystem.persistence.StructInstance; |
| import org.apache.atlas.typesystem.types.AttributeInfo; |
| import org.apache.atlas.typesystem.types.HierarchicalType; |
| import org.apache.atlas.typesystem.types.IConstructableType; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| @Deprecated |
| public abstract class HierarchicalTypeStore { |
| |
| final MemRepository repository; |
| final IConstructableType hierarchicalType; |
| final ArrayList<String> typeNameList; |
| final ImmutableMap<AttributeInfo, IAttributeStore> attrStores; |
| final ImmutableList<HierarchicalTypeStore> superTypeStores; |
| |
| |
| /** |
| * Map Id to position in storage lists. |
| */ |
| Map<Id, Integer> idPosMap; |
| |
| List<Integer> freePositions; |
| |
| int nextPos; |
| |
| /** |
| * Lock for each Class/Trait. |
| */ |
| ReentrantReadWriteLock lock; |
| |
| HierarchicalTypeStore(MemRepository repository, HierarchicalType hierarchicalType) throws RepositoryException { |
| this.hierarchicalType = (IConstructableType) hierarchicalType; |
| this.repository = repository; |
| ImmutableMap.Builder<AttributeInfo, IAttributeStore> b = |
| new ImmutableBiMap.Builder<>(); |
| typeNameList = Lists.newArrayList((String) null); |
| ImmutableList<AttributeInfo> l = hierarchicalType.immediateAttrs; |
| for (AttributeInfo i : l) { |
| b.put(i, AttributeStores.createStore(i)); |
| } |
| attrStores = b.build(); |
| |
| ImmutableList.Builder<HierarchicalTypeStore> b1 = new ImmutableList.Builder<>(); |
| Set<String> allSuperTypeNames = hierarchicalType.getAllSuperTypeNames(); |
| for (String s : allSuperTypeNames) { |
| b1.add(repository.getStore(s)); |
| } |
| superTypeStores = b1.build(); |
| |
| nextPos = 0; |
| idPosMap = new HashMap<>(); |
| freePositions = new ArrayList<>(); |
| |
| lock = new ReentrantReadWriteLock(); |
| } |
| |
| /** |
| * Assign a storage position to an Id. |
| * - try to assign from freePositions |
| * - ensure storage capacity. |
| * - add entry in idPosMap. |
| * @param id |
| * @return |
| * @throws RepositoryException |
| */ |
| int assignPosition(Id id) throws RepositoryException { |
| |
| int pos = -1; |
| if (!freePositions.isEmpty()) { |
| pos = freePositions.remove(0); |
| } else { |
| pos = nextPos++; |
| ensureCapacity(pos); |
| } |
| |
| idPosMap.put(id, pos); |
| |
| for (HierarchicalTypeStore s : superTypeStores) { |
| s.assignPosition(id); |
| } |
| |
| return pos; |
| } |
| |
| /** |
| * - remove from idPosMap |
| * - add to freePositions. |
| * @throws RepositoryException |
| */ |
| void releaseId(Id id) { |
| |
| Integer pos = idPosMap.get(id); |
| if (pos != null) { |
| idPosMap.remove(id); |
| freePositions.add(pos); |
| |
| for (HierarchicalTypeStore s : superTypeStores) { |
| s.releaseId(id); |
| } |
| } |
| } |
| |
| void acquireReadLock() { |
| lock.readLock().lock(); |
| } |
| |
| void acquireWriteLock() { |
| lock.writeLock().lock(); |
| } |
| |
| void releaseReadLock() { |
| lock.readLock().unlock(); |
| } |
| |
| void releaseWriteLock() { |
| lock.writeLock().unlock(); |
| } |
| |
| protected void storeFields(int pos, StructInstance s) throws RepositoryException { |
| for (Map.Entry<AttributeInfo, IAttributeStore> e : attrStores.entrySet()) { |
| IAttributeStore attributeStore = e.getValue(); |
| attributeStore.store(pos, hierarchicalType, s); |
| } |
| } |
| |
| protected void loadFields(int pos, StructInstance s) throws RepositoryException { |
| for (Map.Entry<AttributeInfo, IAttributeStore> e : attrStores.entrySet()) { |
| IAttributeStore attributeStore = e.getValue(); |
| attributeStore.load(pos, hierarchicalType, s); |
| } |
| } |
| |
| /** |
| * - store the typeName |
| * - store the immediate attributes in the respective IAttributeStore |
| * - call store on each SuperType. |
| * @param i |
| * @throws RepositoryException |
| */ |
| void store(ReferenceableInstance i) throws RepositoryException { |
| int pos = idPosMap.get(i.getId()); |
| typeNameList.set(pos, i.getTypeName()); |
| storeFields(pos, i); |
| |
| for (HierarchicalTypeStore s : superTypeStores) { |
| s.store(i); |
| } |
| } |
| |
| /** |
| * - copy over the immediate attribute values from the respective IAttributeStore |
| * - call load on each SuperType. |
| * @param i |
| * @throws RepositoryException |
| */ |
| void load(ReferenceableInstance i) throws RepositoryException { |
| int pos = idPosMap.get(i.getId()); |
| loadFields(pos, i); |
| |
| for (HierarchicalTypeStore s : superTypeStores) { |
| s.load(i); |
| } |
| } |
| |
| public void ensureCapacity(int pos) throws RepositoryException { |
| while (typeNameList.size() < pos + 1) { |
| typeNameList.add(null); |
| } |
| for (Map.Entry<AttributeInfo, IAttributeStore> e : attrStores.entrySet()) { |
| IAttributeStore attributeStore = e.getValue(); |
| attributeStore.ensureCapacity(pos); |
| } |
| } |
| } |