| /***************************************************************** |
| * 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 |
| * |
| * https://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.cayenne.query; |
| |
| import java.io.Serializable; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.StringTokenizer; |
| |
| import org.apache.cayenne.Persistent; |
| import org.apache.cayenne.map.DataMap; |
| import org.apache.cayenne.map.DbEntity; |
| import org.apache.cayenne.map.EntityResolver; |
| import org.apache.cayenne.map.ObjEntity; |
| import org.apache.cayenne.map.Procedure; |
| import org.apache.cayenne.reflect.ClassDescriptor; |
| |
| /** |
| * Default mutable implementation of {@link QueryMetadata}. |
| * |
| * @since 1.1 |
| */ |
| class BaseQueryMetadata implements QueryMetadata, Serializable { |
| |
| private static final long serialVersionUID = 5129792493303459115L; |
| |
| int fetchLimit = QueryMetadata.FETCH_LIMIT_DEFAULT; |
| int fetchOffset = QueryMetadata.FETCH_OFFSET_DEFAULT; |
| |
| int statementFetchSize = QueryMetadata.FETCH_OFFSET_DEFAULT; |
| int queryTimeout = QueryMetadata.QUERY_TIMEOUT_DEFAULT; |
| |
| int pageSize = QueryMetadata.PAGE_SIZE_DEFAULT; |
| boolean fetchingDataRows = QueryMetadata.FETCHING_DATA_ROWS_DEFAULT; |
| QueryCacheStrategy cacheStrategy = QueryCacheStrategy.getDefaultStrategy(); |
| |
| PrefetchTreeNode prefetchTree; |
| String cacheKey; |
| |
| /** |
| * @since 4.0 cacheGroups array replaced with single cache group |
| */ |
| String cacheGroup; |
| |
| transient List<Object> resultSetMapping; |
| transient DbEntity dbEntity; |
| transient DataMap dataMap; |
| transient Object lastRoot; |
| transient ClassDescriptor classDescriptor; |
| transient EntityResolver lastEntityResolver; |
| |
| /** |
| * Copies values of another QueryMetadata object to this object. |
| */ |
| void copyFromInfo(QueryMetadata info) { |
| this.lastEntityResolver = null; |
| this.lastRoot = null; |
| this.classDescriptor = null; |
| this.dbEntity = null; |
| this.dataMap = null; |
| |
| this.fetchingDataRows = info.isFetchingDataRows(); |
| this.fetchLimit = info.getFetchLimit(); |
| this.pageSize = info.getPageSize(); |
| this.cacheStrategy = info.getCacheStrategy(); |
| this.cacheKey = info.getCacheKey(); |
| this.cacheGroup = info.getCacheGroup(); |
| this.resultSetMapping = info.getResultSetMapping(); |
| |
| setPrefetchTree(info.getPrefetchTree()); |
| } |
| |
| boolean resolve(Object root, EntityResolver resolver) { |
| |
| if (lastRoot != root || lastEntityResolver != resolver) { |
| |
| this.classDescriptor = null; |
| this.dbEntity = null; |
| this.dataMap = null; |
| |
| ObjEntity entity = null; |
| |
| if (root != null) { |
| if (root instanceof Class<?>) { |
| entity = resolver.getObjEntity((Class<?>) root, true); |
| if (entity != null) { |
| this.dbEntity = entity.getDbEntity(); |
| this.dataMap = entity.getDataMap(); |
| } |
| } else if (root instanceof ObjEntity) { |
| entity = (ObjEntity) root; |
| this.dbEntity = entity.getDbEntity(); |
| this.dataMap = entity.getDataMap(); |
| } else if (root instanceof String) { |
| entity = resolver.getObjEntity((String) root); |
| if (entity != null) { |
| this.dbEntity = entity.getDbEntity(); |
| this.dataMap = entity.getDataMap(); |
| } |
| } else if (root instanceof DbEntity) { |
| this.dbEntity = (DbEntity) root; |
| this.dataMap = dbEntity.getDataMap(); |
| } else if (root instanceof DataMap) { |
| this.dataMap = (DataMap) root; |
| } else if (root instanceof Persistent) { |
| entity = resolver.getObjEntity((Persistent) root); |
| if (entity != null) { |
| this.dbEntity = entity.getDbEntity(); |
| this.dataMap = entity.getDataMap(); |
| } |
| } |
| } |
| |
| if (entity != null) { |
| this.classDescriptor = resolver.getClassDescriptor(entity.getName()); |
| } |
| |
| this.lastRoot = root; |
| this.lastEntityResolver = resolver; |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void initWithProperties(Map<String, ?> properties) { |
| // must init defaults even if properties are empty |
| if (properties == null) { |
| properties = Collections.emptyMap(); |
| } |
| |
| Object fetchOffset = properties.get(QueryMetadata.FETCH_OFFSET_PROPERTY); |
| Object fetchLimit = properties.get(QueryMetadata.FETCH_LIMIT_PROPERTY); |
| Object pageSize = properties.get(QueryMetadata.PAGE_SIZE_PROPERTY); |
| Object statementFetchSize = properties.get(QueryMetadata.STATEMENT_FETCH_SIZE_PROPERTY); |
| Object fetchingDataRows = properties.get(QueryMetadata.FETCHING_DATA_ROWS_PROPERTY); |
| |
| Object cacheStrategy = properties.get(QueryMetadata.CACHE_STRATEGY_PROPERTY); |
| |
| Object cacheGroups = properties.get(QueryMetadata.CACHE_GROUPS_PROPERTY); |
| |
| // init ivars from properties |
| this.fetchOffset = (fetchOffset != null) ? Integer.parseInt(fetchOffset.toString()) |
| : QueryMetadata.FETCH_OFFSET_DEFAULT; |
| |
| this.fetchLimit = (fetchLimit != null) ? Integer.parseInt(fetchLimit.toString()) |
| : QueryMetadata.FETCH_LIMIT_DEFAULT; |
| |
| this.pageSize = (pageSize != null) ? Integer.parseInt(pageSize.toString()) : QueryMetadata.PAGE_SIZE_DEFAULT; |
| |
| this.statementFetchSize = (statementFetchSize != null) ? Integer.parseInt(statementFetchSize.toString()) |
| : QueryMetadata.STATEMENT_FETCH_SIZE_DEFAULT; |
| |
| this.fetchingDataRows = (fetchingDataRows != null) ? "true".equalsIgnoreCase(fetchingDataRows.toString()) |
| : QueryMetadata.FETCHING_DATA_ROWS_DEFAULT; |
| |
| this.cacheStrategy = (cacheStrategy != null) ? QueryCacheStrategy.safeValueOf(cacheStrategy.toString()) |
| : QueryCacheStrategy.getDefaultStrategy(); |
| |
| this.cacheGroup = null; |
| if(cacheGroups instanceof String) { |
| if(((String) cacheGroups).contains(",")) { |
| StringTokenizer toks = new StringTokenizer(cacheGroups.toString(), ","); |
| if(toks.countTokens() > 0) { |
| this.cacheGroup = toks.nextToken(); |
| } |
| } else { |
| this.cacheGroup = (String) cacheGroups; |
| } |
| } else if (cacheGroups instanceof String[]) { |
| this.cacheGroup = ((String[]) cacheGroups)[0]; |
| } |
| } |
| |
| /** |
| * @since 1.2 |
| */ |
| public String getCacheKey() { |
| return cacheKey; |
| } |
| |
| /** |
| * @since 1.2 |
| */ |
| public DataMap getDataMap() { |
| return dataMap; |
| } |
| |
| /** |
| * @since 1.2 |
| */ |
| public Procedure getProcedure() { |
| return null; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public Map<String, String> getPathSplitAliases() { |
| return Collections.emptyMap(); |
| } |
| |
| /** |
| * @since 1.2 |
| */ |
| public DbEntity getDbEntity() { |
| return dbEntity; |
| } |
| |
| /** |
| * @since 1.2 |
| */ |
| public ObjEntity getObjEntity() { |
| return classDescriptor != null ? classDescriptor.getEntity() : null; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public ClassDescriptor getClassDescriptor() { |
| return classDescriptor; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public List<Object> getResultSetMapping() { |
| return resultSetMapping; |
| } |
| |
| /** |
| * used by select translator |
| * @since 4.2 |
| */ |
| @Override |
| public void setResultSetMapping(List<Object> resultSetMapping) { |
| this.resultSetMapping = resultSetMapping; |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| @Override |
| public boolean isSingleResultSetMapping() { |
| return resultSetMapping != null && resultSetMapping.size() == 1; |
| } |
| |
| /** |
| * @since 1.2 |
| */ |
| public PrefetchTreeNode getPrefetchTree() { |
| return prefetchTree; |
| } |
| |
| void setPrefetchTree(PrefetchTreeNode prefetchTree) { |
| this.prefetchTree = prefetchTree != null ? deepClone(prefetchTree, null) : null; |
| } |
| |
| private PrefetchTreeNode deepClone(PrefetchTreeNode source, PrefetchTreeNode targetParent) { |
| |
| PrefetchTreeNode target = new PrefetchTreeNode(targetParent, source.getName()); |
| target.setEjbqlPathEntityId(source.getEjbqlPathEntityId()); |
| target.setEntityName(source.getEntityName()); |
| target.setPhantom(source.isPhantom()); |
| target.setSemantics(source.getSemantics()); |
| |
| for (PrefetchTreeNode child : source.getChildren()) { |
| target.addChild(deepClone(child, target)); |
| } |
| |
| return target; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public QueryCacheStrategy getCacheStrategy() { |
| return cacheStrategy; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| void setCacheStrategy(QueryCacheStrategy cacheStrategy) { |
| this.cacheStrategy = cacheStrategy != null ? cacheStrategy : QueryCacheStrategy.getDefaultStrategy(); |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| @Override |
| public String getCacheGroup() { |
| return cacheGroup; |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| public void setCacheGroup(String group) { |
| this.cacheGroup = group; |
| } |
| |
| public boolean isFetchingDataRows() { |
| return fetchingDataRows; |
| } |
| |
| public int getFetchLimit() { |
| return fetchLimit; |
| } |
| |
| public int getPageSize() { |
| return pageSize; |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| public Query getOriginatingQuery() { |
| return null; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| public int getFetchOffset() { |
| return fetchOffset; |
| } |
| |
| public boolean isRefreshingObjects() { |
| return true; |
| } |
| |
| void setFetchingDataRows(boolean b) { |
| fetchingDataRows = b; |
| } |
| |
| void setFetchLimit(int i) { |
| fetchLimit = i; |
| } |
| |
| void setFetchOffset(int i) { |
| fetchOffset = i; |
| } |
| |
| void setPageSize(int i) { |
| pageSize = i; |
| } |
| |
| /** |
| * Sets statement's fetch size (0 for no default size) |
| * |
| * @since 3.0 |
| */ |
| void setStatementFetchSize(int size) { |
| this.statementFetchSize = size; |
| } |
| |
| /** |
| * @return statement's fetch size |
| * @since 3.0 |
| */ |
| public int getStatementFetchSize() { |
| return statementFetchSize; |
| } |
| |
| /** |
| * Sets query timeout(0 means no limit, -1 if doesn't set) |
| * @since 4.2 |
| */ |
| void setQueryTimeout(int queryTimeout) { |
| this.queryTimeout = queryTimeout; |
| } |
| |
| /** |
| * @return query timeout |
| * @since 4.2 |
| */ |
| public int getQueryTimeout() { |
| return queryTimeout; |
| } |
| |
| /** |
| * Adds a joint prefetch. |
| * |
| * @since 1.2 |
| */ |
| PrefetchTreeNode addPrefetch(String path, int semantics) { |
| if (prefetchTree == null) { |
| prefetchTree = new PrefetchTreeNode(); |
| } |
| |
| PrefetchTreeNode node = prefetchTree.addPath(path); |
| node.setSemantics(semantics); |
| node.setPhantom(false); |
| return node; |
| } |
| |
| /** |
| * Adds a joint prefetch. |
| * |
| * @since 4.0 |
| */ |
| void mergePrefetch(PrefetchTreeNode node) { |
| if (prefetchTree == null) { |
| prefetchTree = new PrefetchTreeNode(); |
| } |
| |
| prefetchTree.merge(node); |
| } |
| |
| /** |
| * Adds all prefetches from a provided collection. |
| * |
| * @since 1.2 |
| */ |
| void addPrefetches(Collection<String> prefetches, int semantics) { |
| if (prefetches != null) { |
| for (String prefetch : prefetches) { |
| addPrefetch(prefetch, semantics); |
| } |
| } |
| } |
| |
| /** |
| * Clears all joint prefetches. |
| * |
| * @since 1.2 |
| */ |
| void clearPrefetches() { |
| prefetchTree = null; |
| } |
| |
| /** |
| * Removes joint prefetch. |
| * |
| * @since 1.2 |
| */ |
| void removePrefetch(String prefetch) { |
| if (prefetchTree != null) { |
| prefetchTree.removePath(prefetch); |
| } |
| } |
| |
| /** |
| * @since 4.0 |
| */ |
| @Override |
| public boolean isSuppressingDistinct() { |
| return false; |
| } |
| } |