| /* |
| * Copyright (c) 2010-2013, 2015 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Stefan Winkler - initial API and implementation taken from AuditFeatureMapTableMappingWithRanges |
| * Stefan Winkler - Bug 329025: [DB] Support branching for range-based mapping strategy |
| */ |
| package org.eclipse.emf.cdo.server.internal.db.mapping.horizontal; |
| |
| import org.eclipse.emf.cdo.common.branch.CDOBranch; |
| import org.eclipse.emf.cdo.common.branch.CDOBranchManager; |
| import org.eclipse.emf.cdo.common.branch.CDOBranchPoint; |
| import org.eclipse.emf.cdo.common.id.CDOID; |
| import org.eclipse.emf.cdo.common.id.CDOIDUtil; |
| import org.eclipse.emf.cdo.common.revision.CDOList; |
| import org.eclipse.emf.cdo.common.revision.CDORevision; |
| import org.eclipse.emf.cdo.common.revision.CDORevisionUtil; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOAddFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOClearFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOContainerFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDeltaVisitor; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOListFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOMoveFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDORemoveFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOSetFeatureDelta; |
| import org.eclipse.emf.cdo.common.revision.delta.CDOUnsetFeatureDelta; |
| import org.eclipse.emf.cdo.server.IStoreAccessor.QueryXRefsContext; |
| import org.eclipse.emf.cdo.server.IStoreChunkReader; |
| import org.eclipse.emf.cdo.server.IStoreChunkReader.Chunk; |
| import org.eclipse.emf.cdo.server.db.IDBStore; |
| import org.eclipse.emf.cdo.server.db.IDBStoreAccessor; |
| import org.eclipse.emf.cdo.server.db.IDBStoreChunkReader; |
| import org.eclipse.emf.cdo.server.db.IIDHandler; |
| import org.eclipse.emf.cdo.server.db.mapping.IListMappingDeltaSupport; |
| import org.eclipse.emf.cdo.server.db.mapping.IMappingStrategy; |
| import org.eclipse.emf.cdo.server.db.mapping.ITypeMapping; |
| import org.eclipse.emf.cdo.server.internal.db.bundle.OM; |
| import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevision; |
| import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevisionManager; |
| import org.eclipse.emf.cdo.spi.server.InternalRepository; |
| |
| import org.eclipse.net4j.db.DBException; |
| import org.eclipse.net4j.db.DBType; |
| import org.eclipse.net4j.db.DBUtil; |
| import org.eclipse.net4j.db.IDBDatabase; |
| import org.eclipse.net4j.db.IDBPreparedStatement; |
| import org.eclipse.net4j.db.IDBPreparedStatement.ReuseProbability; |
| import org.eclipse.net4j.db.ddl.IDBIndex.Type; |
| import org.eclipse.net4j.db.ddl.IDBTable; |
| import org.eclipse.net4j.util.ImplementationError; |
| import org.eclipse.net4j.util.collection.MoveableList; |
| import org.eclipse.net4j.util.om.trace.ContextTracer; |
| |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.emf.ecore.EStructuralFeature; |
| import org.eclipse.emf.ecore.util.FeatureMap; |
| |
| import java.sql.ResultSet; |
| import java.sql.SQLException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * This is a featuremap-table mapping for audit mode. It is optimized for frequent insert operations at the list's end, |
| * which causes just 1 DB row to be changed. This is achieved by introducing a version range (columns |
| * {@link IMappingConstants#LIST_REVISION_VERSION_ADDED cdo_version_added} and |
| * {@link IMappingConstants#LIST_REVISION_VERSION_REMOVED cdo_version_removed}) which records for which revisions a particular |
| * entry existed. Also, this mapping is mainly optimized for potentially very large lists: the need for having the |
| * complete list stored in memory to do in-the-middle-moved and inserts is traded in for a few more DB access |
| * operations. |
| * |
| * @author Eike Stepper |
| * @author Stefan Winkler |
| * @author Lothar Werzinger |
| * @since 3.0 |
| */ |
| public class BranchingFeatureMapTableMappingWithRanges extends AbstractBasicListTableMapping |
| implements IListMappingDeltaSupport |
| { |
| private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, |
| BranchingFeatureMapTableMappingWithRanges.class); |
| |
| /** |
| * Used to clean up lists for detached objects. |
| */ |
| private static final int FINAL_VERSION = Integer.MAX_VALUE; |
| |
| /** |
| * The table of this mapping. |
| */ |
| private IDBTable table; |
| |
| /** |
| * The tags mapped to column names |
| */ |
| private Map<CDOID, String> tagMap; |
| |
| /** |
| * Column name Set |
| */ |
| private List<String> columnNames; |
| |
| /** |
| * The type mappings for the value fields. |
| */ |
| private Map<CDOID, ITypeMapping> typeMappings; |
| |
| private List<DBType> dbTypes; |
| |
| // --------- SQL strings - see initSQLStrings() ----------------- |
| private String sqlSelectChunksPrefix; |
| |
| private String sqlOrderByIndex; |
| |
| private String sqlInsert; |
| |
| private String sqlRemoveEntry; |
| |
| private String sqlDeleteEntry; |
| |
| private String sqlUpdateIndex; |
| |
| private String sqlGetValue; |
| |
| private String sqlClearList; |
| |
| public BranchingFeatureMapTableMappingWithRanges(IMappingStrategy mappingStrategy, EClass eClass, |
| EStructuralFeature feature) |
| { |
| super(mappingStrategy, eClass, feature); |
| initDBTypes(); |
| initTable(); |
| initSQLStrings(); |
| } |
| |
| private void initDBTypes() |
| { |
| // TODO add annotation processing here ... |
| ITypeMapping.Registry registry = ITypeMapping.Registry.INSTANCE; |
| dbTypes = new ArrayList<DBType>(registry.getDefaultFeatureMapDBTypes()); |
| } |
| |
| private void initTable() |
| { |
| String tableName = getMappingStrategy().getTableName(getContainingClass(), getFeature()); |
| IDBStore store = getMappingStrategy().getStore(); |
| DBType idType = store.getIDHandler().getDBType(); |
| int idLength = store.getIDColumnLength(); |
| |
| IDBDatabase database = getMappingStrategy().getStore().getDatabase(); |
| table = database.getSchema().getTable(tableName); |
| if (table == null) |
| { |
| table = database.getSchemaTransaction().getWorkingCopy().addTable(tableName); |
| table.addField(FEATUREMAP_REVISION_ID, idType, idLength); |
| table.addField(LIST_REVISION_BRANCH, DBType.INTEGER); |
| table.addField(FEATUREMAP_VERSION_ADDED, DBType.INTEGER); |
| table.addField(FEATUREMAP_VERSION_REMOVED, DBType.INTEGER); |
| table.addField(FEATUREMAP_IDX, DBType.INTEGER); |
| table.addField(FEATUREMAP_TAG, idType, idLength); |
| |
| tagMap = CDOIDUtil.createMap(); |
| typeMappings = CDOIDUtil.createMap(); |
| columnNames = new ArrayList<String>(); |
| |
| initTypeColumns(true); |
| |
| table.addIndex(Type.NON_UNIQUE, FEATUREMAP_REVISION_ID); |
| table.addIndex(Type.NON_UNIQUE, LIST_REVISION_BRANCH); |
| table.addIndex(Type.NON_UNIQUE, FEATUREMAP_VERSION_ADDED); |
| table.addIndex(Type.NON_UNIQUE, FEATUREMAP_VERSION_REMOVED); |
| table.addIndex(Type.NON_UNIQUE, FEATUREMAP_IDX); |
| table.addIndex(Type.NON_UNIQUE, FEATUREMAP_TAG); |
| } |
| else |
| { |
| initTypeColumns(false); |
| } |
| } |
| |
| private void initTypeColumns(boolean create) |
| { |
| for (DBType type : getDBTypes()) |
| { |
| String column = FEATUREMAP_VALUE + "_" + type.name(); |
| if (create) |
| { |
| table.addField(column, type); |
| } |
| |
| columnNames.add(column); |
| } |
| } |
| |
| private void initSQLStrings() |
| { |
| String tableName = getTable().getName(); |
| |
| // ---------------- SELECT to read chunks ---------------------------- |
| StringBuilder builder = new StringBuilder(); |
| builder.append("SELECT "); //$NON-NLS-1$ |
| |
| builder.append(FEATUREMAP_IDX); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_TAG); |
| builder.append(", "); //$NON-NLS-1$ |
| |
| Iterator<String> iter = columnNames.iterator(); |
| while (iter.hasNext()) |
| { |
| builder.append(iter.next()); |
| if (iter.hasNext()) |
| { |
| builder.append(", "); //$NON-NLS-1$ |
| } |
| } |
| |
| builder.append(" FROM "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_ADDED); |
| builder.append("<=? AND ("); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append(" IS NULL OR "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append(">?)"); //$NON-NLS-1$ |
| sqlSelectChunksPrefix = builder.toString(); |
| |
| sqlOrderByIndex = " ORDER BY " + FEATUREMAP_IDX; //$NON-NLS-1$ |
| |
| // ----------------- INSERT - prefix ----------------- |
| builder = new StringBuilder("INSERT INTO "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append("("); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_ADDED); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_IDX); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_TAG); |
| |
| for (int i = 0; i < columnNames.size(); i++) |
| { |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(columnNames.get(i)); |
| } |
| |
| builder.append(") VALUES (?, ?, ?, ?, ?, ?"); //$NON-NLS-1$ |
| for (int i = 0; i < columnNames.size(); i++) |
| { |
| builder.append(", ?"); //$NON-NLS-1$ |
| } |
| |
| builder.append(")"); //$NON-NLS-1$ |
| sqlInsert = builder.toString(); |
| |
| // ----------------- remove current entry ----------------- |
| builder = new StringBuilder("UPDATE "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" SET "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append("=? "); //$NON-NLS-1$ |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_IDX); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append(" IS NULL"); //$NON-NLS-1$ |
| sqlRemoveEntry = builder.toString(); |
| |
| // ----------------- delete temporary entry ----------------- |
| builder = new StringBuilder("DELETE FROM "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_IDX); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_ADDED); |
| builder.append("=?"); //$NON-NLS-1$ |
| sqlDeleteEntry = builder.toString(); |
| |
| // ----------------- update index ----------------- |
| builder = new StringBuilder("UPDATE "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" SET "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_IDX); |
| builder.append("=? WHERE "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_ADDED); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_IDX); |
| builder.append("=?"); //$NON-NLS-1$ |
| sqlUpdateIndex = builder.toString(); |
| |
| // ----------------- get current value ----------------- |
| builder = new StringBuilder("SELECT "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_TAG); |
| builder.append(", "); //$NON-NLS-1$ |
| |
| iter = columnNames.iterator(); |
| while (iter.hasNext()) |
| { |
| builder.append(iter.next()); |
| if (iter.hasNext()) |
| { |
| builder.append(", "); //$NON-NLS-1$ |
| } |
| } |
| |
| builder.append(" FROM "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_IDX); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append(" IS NULL"); //$NON-NLS-1$ |
| sqlGetValue = builder.toString(); |
| |
| // ----------- clear list items ------------------------- |
| builder = new StringBuilder("UPDATE "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" SET "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append("=? "); //$NON-NLS-1$ |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(FEATUREMAP_VERSION_REMOVED); |
| builder.append(" IS NULL"); //$NON-NLS-1$ |
| sqlClearList = builder.toString(); |
| } |
| |
| public Collection<IDBTable> getDBTables() |
| { |
| return Collections.singleton(table); |
| } |
| |
| protected List<DBType> getDBTypes() |
| { |
| return dbTypes; |
| } |
| |
| protected final IDBTable getTable() |
| { |
| return table; |
| } |
| |
| protected final List<String> getColumnNames() |
| { |
| return columnNames; |
| } |
| |
| protected final Map<CDOID, ITypeMapping> getTypeMappings() |
| { |
| return typeMappings; |
| } |
| |
| protected final Map<CDOID, String> getTagMap() |
| { |
| return tagMap; |
| } |
| |
| public void readValues(IDBStoreAccessor accessor, InternalCDORevision revision, int listChunk) |
| { |
| MoveableList<Object> list = revision.getList(getFeature()); |
| int valuesToRead = list.size(); |
| |
| if (listChunk != CDORevision.UNCHUNKED && listChunk < valuesToRead) |
| { |
| valuesToRead = listChunk; |
| } |
| |
| if (valuesToRead == 0) |
| { |
| // nothing to read take shortcut |
| return; |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading list values for feature {0}.{1} of {2}", getContainingClass().getName(), getFeature() //$NON-NLS-1$ |
| .getName(), revision); |
| } |
| |
| String sql = sqlSelectChunksPrefix + sqlOrderByIndex; |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sql, ReuseProbability.HIGH); |
| ResultSet resultSet = null; |
| |
| IStoreChunkReader baseReader = null; |
| |
| try |
| { |
| CDOID id = revision.getID(); |
| int branchID = revision.getBranch().getID(); |
| |
| idHandler.setCDOID(stmt, 1, id); |
| stmt.setInt(2, branchID); |
| stmt.setInt(3, revision.getVersion()); |
| stmt.setInt(4, revision.getVersion()); |
| |
| stmt.setMaxRows(valuesToRead); // optimization - don't read unneeded rows. |
| |
| resultSet = stmt.executeQuery(); |
| |
| int currentIndex = 0; |
| |
| while (valuesToRead > 0 && resultSet.next()) |
| { |
| int index = resultSet.getInt(1); |
| if (index > currentIndex) |
| { |
| if (baseReader == null) |
| { |
| baseReader = createBaseChunkReader(accessor, id, branchID); |
| } |
| |
| baseReader.addRangedChunk(currentIndex, index); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Scheduling range {0}-{1} to be read from base revision", currentIndex, index); //$NON-NLS-1$ |
| } |
| |
| valuesToRead -= index - currentIndex; |
| currentIndex = index; |
| } |
| |
| CDOID tag = idHandler.getCDOID(resultSet, 2); |
| Object value = getTypeMapping(tag).readValue(resultSet); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Read value for index {0} from result set: {1}", currentIndex, value); //$NON-NLS-1$ |
| } |
| |
| list.set(currentIndex++, CDORevisionUtil.createFeatureMapEntry(getFeatureByTag(tag), value)); |
| valuesToRead--; |
| } |
| |
| if (valuesToRead > 0) |
| { |
| if (baseReader == null) |
| { |
| baseReader = createBaseChunkReader(accessor, id, branchID); |
| } |
| |
| baseReader.addRangedChunk(currentIndex, currentIndex + valuesToRead); |
| } |
| } |
| catch (SQLException ex) |
| { |
| throw new DBException(ex); |
| } |
| finally |
| { |
| DBUtil.close(resultSet); |
| DBUtil.close(stmt); |
| } |
| |
| if (baseReader != null) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading base revision chunks for featureMap {0}.{1} of {2} from base revision {3}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), revision, baseReader.getRevision()); |
| } |
| |
| List<Chunk> baseChunks = baseReader.executeRead(); |
| for (Chunk chunk : baseChunks) |
| { |
| int startIndex = chunk.getStartIndex(); |
| for (int i = 0; i < chunk.size(); i++) |
| { |
| list.set(startIndex + i, chunk.get(i)); |
| } |
| } |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading list values done for feature {0}.{1} of {2}", getContainingClass().getName(), //$NON-NLS-1$ |
| getFeature().getName(), revision); |
| } |
| } |
| |
| public final void readChunks(IDBStoreChunkReader chunkReader, List<Chunk> chunks, String where) |
| { |
| CDORevision revision = chunkReader.getRevision(); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading list chunk values for feature {0}.{1} of {2}", getContainingClass().getName(), //$NON-NLS-1$ |
| getFeature().getName(), revision); |
| } |
| |
| StringBuilder builder = new StringBuilder(sqlSelectChunksPrefix); |
| if (where != null) |
| { |
| builder.append(" AND "); //$NON-NLS-1$ |
| builder.append(where); |
| } |
| |
| builder.append(sqlOrderByIndex); |
| String sql = builder.toString(); |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = chunkReader.getAccessor().getDBConnection().prepareStatement(sql, ReuseProbability.LOW); |
| ResultSet resultSet = null; |
| IStoreChunkReader baseReader = null; |
| |
| try |
| { |
| idHandler.setCDOID(stmt, 1, revision.getID()); |
| stmt.setInt(2, revision.getBranch().getID()); |
| stmt.setInt(3, revision.getVersion()); |
| stmt.setInt(4, revision.getVersion()); |
| |
| resultSet = stmt.executeQuery(); |
| |
| int nextDBIndex = Integer.MAX_VALUE; // next available DB index |
| if (resultSet.next()) |
| { |
| nextDBIndex = resultSet.getInt(1); |
| } |
| |
| for (Chunk chunk : chunks) |
| { |
| int startIndex = chunk.getStartIndex(); |
| int missingValueStartIndex = -1; |
| |
| for (int i = 0; i < chunk.size(); i++) |
| { |
| int nextListIndex = startIndex + i; // next expected list index |
| |
| if (nextDBIndex == nextListIndex) |
| { |
| // DB value is available. check first if missing indexes were present before. |
| if (missingValueStartIndex != -1) |
| { |
| // read missing indexes from missingValueStartIndex to currentIndex |
| if (baseReader == null) |
| { |
| baseReader = createBaseChunkReader(chunkReader.getAccessor(), chunkReader.getRevision().getID(), |
| chunkReader.getRevision().getBranch().getID()); |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Scheduling range {0}-{1} to be read from base revision", missingValueStartIndex, //$NON-NLS-1$ |
| nextListIndex); |
| } |
| |
| baseReader.addRangedChunk(missingValueStartIndex, nextListIndex); |
| |
| // reset missingValueStartIndex |
| missingValueStartIndex = -1; |
| } |
| |
| // now read value and set to chunk |
| CDOID tag = idHandler.getCDOID(resultSet, 2); |
| Object value = getTypeMapping(tag).readValue(resultSet); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("ChunkReader read value for index {0} from result set: {1}", nextDBIndex, value); //$NON-NLS-1$ |
| } |
| |
| chunk.add(i, CDORevisionUtil.createFeatureMapEntry(getFeatureByTag(tag), value)); |
| |
| // advance DB cursor and read next available index |
| if (resultSet.next()) |
| { |
| nextDBIndex = resultSet.getInt(1); |
| } |
| else |
| { |
| // no more DB indexes available, but we have to continue checking for gaps, therefore set to MAX_VALUE |
| nextDBIndex = Integer.MAX_VALUE; |
| } |
| } |
| else |
| { |
| // gap between next DB index and next list index detected. |
| // skip until end of chunk or until DB value becomes available |
| if (missingValueStartIndex == -1) |
| { |
| missingValueStartIndex = nextListIndex; |
| } |
| } |
| } |
| |
| // chunk complete. check for missing values at the end of the chunk. |
| if (missingValueStartIndex != -1) |
| { |
| // read missing indexes from missingValueStartIndex to last chunk index |
| if (baseReader == null) |
| { |
| baseReader = createBaseChunkReader(chunkReader.getAccessor(), chunkReader.getRevision().getID(), |
| chunkReader.getRevision().getBranch().getID()); |
| } |
| baseReader.addRangedChunk(missingValueStartIndex, chunk.getStartIndex() + chunk.size()); |
| } |
| } |
| } |
| catch (SQLException ex) |
| { |
| throw new DBException(ex); |
| } |
| finally |
| { |
| DBUtil.close(resultSet); |
| DBUtil.close(stmt); |
| } |
| |
| // now read missing values from base revision. |
| if (baseReader != null) |
| { |
| List<Chunk> baseChunks = baseReader.executeRead(); |
| |
| Iterator<Chunk> thisIterator = chunks.iterator(); |
| Chunk thisChunk = thisIterator.next(); |
| |
| for (Chunk baseChunk : baseChunks) |
| { |
| int baseStartIndex = baseChunk.getStartIndex(); |
| |
| while (baseStartIndex > thisChunk.getStartIndex() + thisChunk.size()) |
| { |
| // advance thisChunk, because it does not match baseChunk |
| thisChunk = thisIterator.next(); |
| } |
| |
| // baseChunk now corresponds to this chunk, but startIndex of baseChunk may be higher. |
| // therefore calculate offset |
| int offset = thisChunk.getStartIndex() - baseStartIndex; |
| |
| // and copy values. |
| for (int i = 0; i < baseChunk.size(); i++) |
| { |
| thisChunk.add(i + offset, baseChunk.get(i)); |
| } |
| } // finally, continue with the next baseChunk |
| |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading list chunk values done for feature {0}.{1} of {2}", getContainingClass().getName(), //$NON-NLS-1$ |
| getFeature(), revision); |
| } |
| } |
| |
| public void writeValues(IDBStoreAccessor accessor, InternalCDORevision revision) |
| { |
| CDOList values = revision.getList(getFeature()); |
| |
| int idx = 0; |
| for (Object element : values) |
| { |
| writeValue(accessor, revision, idx++, element); |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Writing done"); //$NON-NLS-1$ |
| } |
| } |
| |
| protected final void writeValue(IDBStoreAccessor accessor, CDORevision revision, int idx, Object value) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Writing value for feature {0}.{1} index {2} of {3} : {4}", getContainingClass().getName(), //$NON-NLS-1$ |
| getFeature(), idx, revision, value); |
| } |
| |
| addEntry(accessor, revision.getID(), revision.getBranch().getID(), revision.getVersion(), idx, value, |
| revision.getTimeStamp()); |
| } |
| |
| /** |
| * Get column name (lazy). |
| * |
| * @param tag |
| * The feature's MetaID in CDO |
| * @return the column name where the values are stored |
| */ |
| protected String getColumnName(CDOID tag) |
| { |
| String column = tagMap.get(tag); |
| if (column == null) |
| { |
| addFeature(tag); |
| column = tagMap.get(tag); |
| } |
| |
| return column; |
| } |
| |
| /** |
| * Get type mapping (lazy). |
| * |
| * @param tag |
| * The feature's MetaID in CDO |
| * @return the corresponding type mapping |
| */ |
| protected ITypeMapping getTypeMapping(CDOID tag) |
| { |
| ITypeMapping typeMapping = typeMappings.get(tag); |
| if (typeMapping == null) |
| { |
| addFeature(tag); |
| typeMapping = typeMappings.get(tag); |
| } |
| |
| return typeMapping; |
| } |
| |
| private void addFeature(CDOID tag) |
| { |
| EStructuralFeature modelFeature = getFeatureByTag(tag); |
| |
| ITypeMapping typeMapping = getMappingStrategy().createValueMapping(modelFeature); |
| String column = FEATUREMAP_VALUE + "_" + typeMapping.getDBType(); //$NON-NLS-1$ |
| |
| tagMap.put(tag, column); |
| typeMapping.setDBField(table, column); |
| typeMappings.put(tag, typeMapping); |
| } |
| |
| /** |
| * @param metaID |
| * @return the column name where the values are stored |
| */ |
| private EStructuralFeature getFeatureByTag(CDOID tag) |
| { |
| return (EStructuralFeature)getMappingStrategy().getStore().getMetaDataManager().getMetaInstance(tag); |
| } |
| |
| /** |
| * @param feature |
| * The EStructuralFeature |
| * @return The feature's MetaID in CDO |
| */ |
| protected CDOID getTagByFeature(EStructuralFeature feature, long created) |
| { |
| return getMappingStrategy().getStore().getMetaDataManager().getMetaID(feature, created); |
| } |
| |
| /** |
| * Clear a list of a given revision. |
| * |
| * @param accessor |
| * the accessor to use |
| * @param id |
| * the id of the revision from which to remove all items |
| */ |
| public void clearList(IDBStoreAccessor accessor, CDOID id, int branchId, int oldVersion, int newVersion, |
| int lastIndex, long timestamp) |
| { |
| // check for each index if the value exists in the current branch |
| for (int i = 0; i <= lastIndex; i++) |
| { |
| if (getValue(accessor, id, branchId, i, false) == null) |
| { |
| // if not, add a historic entry for missing ones. |
| addHistoricEntry(accessor, id, branchId, 0, newVersion, i, getValueFromBase(accessor, id, branchId, i), |
| timestamp); |
| } |
| } |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlClearList, ReuseProbability.HIGH); |
| |
| try |
| { |
| // clear rest of the list |
| stmt.setInt(1, newVersion); |
| idHandler.setCDOID(stmt, 2, id); |
| stmt.setInt(3, branchId); |
| |
| int result = DBUtil.update(stmt, false); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("ClearList result: {0}", result); //$NON-NLS-1$ |
| } |
| } |
| catch (SQLException e) |
| { |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| |
| public void objectDetached(IDBStoreAccessor accessor, CDOID id, long revised) |
| { |
| InternalCDORevision revision = (InternalCDORevision)accessor.getTransaction().getRevision(id); |
| int branchId = accessor.getTransaction().getBranch().getID(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("objectDetached {1}", revision); //$NON-NLS-1$ |
| } |
| |
| clearList(accessor, id, branchId, revision.getVersion(), FINAL_VERSION, revision.getList(getFeature()).size() - 1, |
| revised); |
| } |
| |
| @Override |
| public void rawDeleted(IDBStoreAccessor accessor, CDOID id, CDOBranch branch, int version) |
| { |
| throw new UnsupportedOperationException("Raw deletion does not work in range-based mappings"); |
| } |
| |
| public void processDelta(final IDBStoreAccessor accessor, final CDOID id, final int branchId, int oldVersion, |
| final int newVersion, long created, CDOListFeatureDelta delta) |
| { |
| List<CDOFeatureDelta> listChanges = delta.getListChanges(); |
| if (listChanges.size() == 0) |
| { |
| // nothing to do. |
| return; |
| } |
| |
| InternalCDORevision originalRevision = (InternalCDORevision)accessor.getTransaction().getRevision(id); |
| int oldListSize = originalRevision.getList(getFeature()).size(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("ListTableMapping.processDelta for revision {0} - previous list size: {1}", originalRevision, //$NON-NLS-1$ |
| oldListSize); |
| } |
| |
| // let the visitor collect the changes |
| ListDeltaVisitor visitor = new ListDeltaVisitor(accessor, originalRevision, branchId, oldVersion, newVersion, |
| created); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Processing deltas..."); //$NON-NLS-1$ |
| } |
| |
| // optimization: it's only necessary to process deltas |
| // starting with the last feature delta which clears the list |
| // (any operation before the clear is cascaded by it anyway) |
| int index = listChanges.size() - 1; |
| while (index > 0) |
| { |
| CDOFeatureDelta listDelta = listChanges.get(index); |
| if (listDelta instanceof CDOClearFeatureDelta || listDelta instanceof CDOUnsetFeatureDelta) |
| { |
| break; |
| } |
| index--; |
| } |
| while (index < listChanges.size()) |
| { |
| listChanges.get(index++).accept(visitor); |
| } |
| } |
| |
| private class ListDeltaVisitor implements CDOFeatureDeltaVisitor |
| { |
| private IDBStoreAccessor accessor; |
| |
| private InternalCDORevision originalRevision; |
| |
| private CDOID id; |
| |
| private int branchID; |
| |
| private int oldVersion; |
| |
| private int newVersion; |
| |
| private int lastIndex; |
| |
| private long timestamp; |
| |
| public ListDeltaVisitor(IDBStoreAccessor accessor, InternalCDORevision originalRevision, int targetBranchID, |
| int oldVersion, int newVersion, long timestamp) |
| { |
| this.accessor = accessor; |
| this.originalRevision = originalRevision; |
| id = this.originalRevision.getID(); |
| branchID = targetBranchID; |
| this.oldVersion = oldVersion; |
| this.newVersion = newVersion; |
| lastIndex = originalRevision.getList(getFeature()).size() - 1; |
| this.timestamp = timestamp; |
| } |
| |
| public void visit(CDOMoveFeatureDelta delta) |
| { |
| int fromIdx = delta.getOldPosition(); |
| int toIdx = delta.getNewPosition(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Moving: {0} to {1}", fromIdx, toIdx); //$NON-NLS-1$ |
| } |
| |
| Object value = getValue(accessor, id, branchID, fromIdx, true); |
| |
| // remove the item |
| removeEntry(accessor, id, branchID, oldVersion, newVersion, fromIdx, timestamp); |
| |
| // adjust indexes and shift either up or down |
| if (fromIdx < toIdx) |
| { |
| moveOneUp(accessor, id, branchID, oldVersion, newVersion, fromIdx + 1, toIdx); |
| } |
| else |
| { // fromIdx > toIdx here |
| moveOneDown(accessor, id, branchID, oldVersion, newVersion, toIdx, fromIdx - 1); |
| } |
| |
| // create the item |
| addEntry(accessor, id, branchID, newVersion, toIdx, value, timestamp); |
| } |
| |
| public void visit(CDOAddFeatureDelta delta) |
| { |
| int startIndex = delta.getIndex(); |
| int endIndex = lastIndex; |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Adding at: {0}", startIndex); //$NON-NLS-1$ |
| } |
| |
| if (startIndex <= endIndex) |
| { |
| // make room for the new item |
| moveOneDown(accessor, id, branchID, oldVersion, newVersion, startIndex, endIndex); |
| } |
| |
| // create the item |
| addEntry(accessor, id, branchID, newVersion, startIndex, delta.getValue(), timestamp); |
| |
| ++lastIndex; |
| } |
| |
| public void visit(CDORemoveFeatureDelta delta) |
| { |
| int startIndex = delta.getIndex(); |
| int endIndex = lastIndex; |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Removing at: {0}", startIndex); //$NON-NLS-1$ |
| } |
| |
| // remove the item |
| removeEntry(accessor, id, branchID, oldVersion, newVersion, startIndex, timestamp); |
| |
| // make room for the new item |
| moveOneUp(accessor, id, branchID, oldVersion, newVersion, startIndex + 1, endIndex); |
| |
| --lastIndex; |
| } |
| |
| public void visit(CDOSetFeatureDelta delta) |
| { |
| int index = delta.getIndex(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Setting at: {0}", index); //$NON-NLS-1$ |
| } |
| |
| // remove the item |
| removeEntry(accessor, id, branchID, oldVersion, newVersion, index, timestamp); |
| |
| // create the item |
| addEntry(accessor, id, branchID, newVersion, index, delta.getValue(), timestamp); |
| } |
| |
| public void visit(CDOUnsetFeatureDelta delta) |
| { |
| if (delta.getFeature().isUnsettable()) |
| { |
| throw new ImplementationError("Should not be called"); //$NON-NLS-1$ |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Unsetting"); //$NON-NLS-1$ |
| } |
| |
| clearList(accessor, id, branchID, oldVersion, newVersion, lastIndex, timestamp); |
| lastIndex = -1; |
| } |
| |
| public void visit(CDOListFeatureDelta delta) |
| { |
| throw new ImplementationError("Should not be called"); //$NON-NLS-1$ |
| } |
| |
| public void visit(CDOClearFeatureDelta delta) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Clearing"); //$NON-NLS-1$ |
| } |
| |
| clearList(accessor, id, branchID, oldVersion, newVersion, lastIndex, timestamp); |
| lastIndex = -1; |
| } |
| |
| public void visit(CDOContainerFeatureDelta delta) |
| { |
| throw new ImplementationError("Should not be called"); //$NON-NLS-1$ |
| } |
| |
| private void moveOneUp(IDBStoreAccessor accessor, CDOID id, int branchId, int oldVersion, int newVersion, |
| int startIndex, int endIndex) |
| { |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlUpdateIndex, ReuseProbability.HIGH); |
| |
| try |
| { |
| for (int index = startIndex; index <= endIndex; ++index) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneUp moving: {0} -> {1}", index, index - 1); //$NON-NLS-1$ |
| } |
| |
| int column = 1; |
| stmt.setInt(column++, index - 1); |
| idHandler.setCDOID(stmt, startIndex++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, newVersion); |
| stmt.setInt(column++, index); |
| |
| int result = DBUtil.update(stmt, false); |
| switch (result) |
| { |
| case 1: |
| // entry for current revision was already present. |
| // index update succeeded. |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneUp updated: {0} -> {1}", index, index - 1); //$NON-NLS-1$ |
| } |
| |
| break; |
| case 0: |
| Object value = getValue(accessor, id, branchId, index, false); |
| |
| if (value != null) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneUp remove: {0}", index); //$NON-NLS-1$ |
| } |
| |
| removeEntry(accessor, id, branchId, oldVersion, newVersion, index, timestamp); |
| } |
| else |
| { |
| value = getValueFromBase(accessor, id, branchId, index); |
| { |
| TRACER.format("moveOneUp add historic entry at: {0}", index); //$NON-NLS-1$ |
| } |
| |
| addHistoricEntry(accessor, id, branchId, 0, newVersion, index, value, timestamp); |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneUp add: {0}", index - 1); //$NON-NLS-1$ |
| } |
| |
| addEntry(accessor, id, branchId, newVersion, index - 1, value, timestamp); |
| break; |
| default: |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneUp Too many results: {0} -> {1}: {2}", index, index + 1, result); //$NON-NLS-1$ |
| } |
| |
| throw new DBException("Too many results"); //$NON-NLS-1$ |
| } |
| } |
| } |
| catch (SQLException e) |
| { |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| |
| private void moveOneDown(IDBStoreAccessor accessor, CDOID id, int branchId, int oldVersion, int newVersion, |
| int startIndex, int endIndex) |
| { |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlUpdateIndex, ReuseProbability.HIGH); |
| |
| try |
| { |
| for (int index = endIndex; index >= startIndex; --index) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneDown moving: {0} -> {1}", index, index + 1); //$NON-NLS-1$ |
| } |
| |
| int column = 1; |
| stmt.setInt(column++, index + 1); |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, newVersion); |
| stmt.setInt(column++, index); |
| |
| int result = DBUtil.update(stmt, false); |
| switch (result) |
| { |
| case 1: |
| // entry for current revision was already present. |
| // index update succeeded. |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneDown updated: {0} -> {1}", index, index + 1); //$NON-NLS-1$ |
| } |
| |
| break; |
| case 0: |
| Object value = getValue(accessor, id, branchId, index, false); |
| if (value != null) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneDown remove: {0}", index); //$NON-NLS-1$ |
| } |
| |
| removeEntry(accessor, id, branchId, oldVersion, newVersion, index, timestamp); |
| } |
| else |
| { |
| value = getValueFromBase(accessor, id, branchId, index); |
| { |
| TRACER.format("moveOneDown add historic entry at: {0}", index); //$NON-NLS-1$ |
| } |
| |
| addHistoricEntry(accessor, id, branchId, 0, newVersion, index, value, timestamp); |
| } |
| |
| addEntry(accessor, id, branchId, newVersion, index + 1, value, timestamp); |
| break; |
| default: |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneDown Too many results: {0} -> {1}: {2}", index, index + 1, result); //$NON-NLS-1$ |
| } |
| |
| throw new DBException("Too many results"); //$NON-NLS-1$ |
| } |
| } |
| } |
| catch (SQLException e) |
| { |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| } |
| |
| private void addEntry(IDBStoreAccessor accessor, CDOID id, int branchId, int version, int index, Object value, |
| long timestamp) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Adding value for feature() {0}.{1} index {2} of {3}v{4} : {5}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, version, value); |
| } |
| |
| FeatureMap.Entry entry = (FeatureMap.Entry)value; |
| EStructuralFeature entryFeature = entry.getEStructuralFeature(); |
| CDOID tag = getTagByFeature(entryFeature, timestamp); |
| String columnName = getColumnName(tag); |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlInsert, ReuseProbability.HIGH); |
| |
| try |
| { |
| int column = 1; |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, version); |
| stmt.setNull(column++, DBType.INTEGER.getCode()); // versionRemoved |
| stmt.setInt(column++, index); |
| idHandler.setCDOID(stmt, column++, tag); |
| |
| for (int i = 0; i < columnNames.size(); i++) |
| { |
| if (columnNames.get(i).equals(columnName)) |
| { |
| getTypeMapping(tag).setValue(stmt, column++, entry.getValue()); |
| } |
| else |
| { |
| stmt.setNull(column++, getDBTypes().get(i).getCode()); |
| } |
| } |
| |
| DBUtil.update(stmt, true); |
| } |
| catch (SQLException e) |
| { |
| throw new DBException(e); |
| } |
| catch (IllegalStateException e) |
| { |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| |
| private void addHistoricEntry(IDBStoreAccessor accessor, CDOID id, int branchId, int versionAdded, int versionRemoved, |
| int index, Object value, long timestamp) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Adding historic value for feature {0}.{1} index {2} of {3}:{4}v{5}-v{6} : {7}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, branchId, versionAdded, versionRemoved, |
| value); |
| } |
| |
| FeatureMap.Entry entry = (FeatureMap.Entry)value; |
| EStructuralFeature entryFeature = entry.getEStructuralFeature(); |
| CDOID tag = getTagByFeature(entryFeature, timestamp); |
| ITypeMapping typeMapping = getTypeMapping(tag); |
| String columnName = getColumnName(tag); |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlInsert, ReuseProbability.HIGH); |
| |
| try |
| { |
| int column = 1; |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, versionAdded); |
| stmt.setNull(column++, versionRemoved); |
| stmt.setInt(column++, index); |
| idHandler.setCDOID(stmt, column++, tag); |
| |
| for (int i = 0; i < columnNames.size(); i++) |
| { |
| if (columnNames.get(i).equals(columnName)) |
| { |
| typeMapping.setValue(stmt, column++, entry.getValue()); |
| } |
| else |
| { |
| stmt.setNull(column++, getDBTypes().get(i).getCode()); |
| } |
| } |
| |
| DBUtil.update(stmt, true); |
| } |
| catch (SQLException e) |
| { |
| throw new DBException(e); |
| } |
| catch (IllegalStateException e) |
| { |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| |
| private void removeEntry(IDBStoreAccessor accessor, CDOID id, int branchId, int oldVersion, int newVersion, int index, |
| long timestamp) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Removing value for feature() {0}.{1} index {2} of {3}v{4}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, newVersion); |
| } |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlDeleteEntry, ReuseProbability.HIGH); |
| |
| try |
| { |
| // try to delete a temporary entry first |
| int column = 1; |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, index); |
| stmt.setInt(column++, newVersion); |
| |
| int result = DBUtil.update(stmt, false); |
| if (result == 1) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("removeEntry deleted: {0}", index); //$NON-NLS-1$ |
| } |
| } |
| else if (result > 1) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("removeEntry Too many results: {0}: {1}", index, result); //$NON-NLS-1$ |
| } |
| |
| throw new DBException("Too many results"); //$NON-NLS-1$ |
| } |
| else |
| { |
| // no temporary entry found, so mark the entry as removed |
| DBUtil.close(stmt); |
| stmt = accessor.getDBConnection().prepareStatement(sqlRemoveEntry, ReuseProbability.HIGH); |
| |
| column = 1; |
| stmt.setInt(column++, newVersion); |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, index); |
| result = DBUtil.update(stmt, false); |
| |
| if (result == 0) |
| { |
| // no entry removed -> this means that we are in a branch and |
| // the entry has not been modified since the branch fork. |
| // therefore, we have to copy the base value and mark it as removed |
| Object value = getValueFromBase(accessor, id, branchId, index); |
| addHistoricEntry(accessor, id, branchId, 0, newVersion, index, value, timestamp); |
| } |
| } |
| } |
| catch (SQLException e) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Removing value for feature() {0}.{1} index {2} of {3}v{4} FAILED {5}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, newVersion, e.getMessage()); |
| } |
| |
| throw new DBException(e); |
| } |
| catch (IllegalStateException e) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Removing value for feature() {0}.{1} index {2} of {3}v{4} FAILED {5}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, newVersion, e.getMessage()); |
| } |
| |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| |
| private FeatureMap.Entry getValue(IDBStoreAccessor accessor, CDOID id, int branchId, int index, boolean getFromBase) |
| { |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlGetValue, ReuseProbability.HIGH); |
| FeatureMap.Entry result = null; |
| |
| try |
| { |
| int column = 1; |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, index); |
| |
| ResultSet resultSet = stmt.executeQuery(); |
| if (resultSet.next()) |
| { |
| CDOID tag = idHandler.getCDOID(resultSet, 1); |
| Object value = getTypeMapping(tag).readValue(resultSet); |
| result = CDORevisionUtil.createFeatureMapEntry(getFeatureByTag(tag), value); |
| } |
| else |
| { |
| // value is not in this branch. |
| // -> read from base revision |
| if (getFromBase) |
| { |
| result = getValueFromBase(accessor, id, branchId, index); |
| } // else: result remains null |
| } |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Read value (index {0}) from result set: {1}", index, result); //$NON-NLS-1$ |
| } |
| } |
| catch (SQLException e) |
| { |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Read a single value (at a given index) from the base revision |
| * |
| * @param accessor |
| * the DBStoreAccessor |
| * @param id |
| * the ID of the revision |
| * @param branchID |
| * the ID of the current (child) branch |
| * @param index |
| * the index to read the value from |
| * @return the value which is at index <code>index</code> in revision with ID <code>id</code> in the parent branch at |
| * the base of this branch (indicated by <code>branchID</code>). |
| */ |
| private FeatureMap.Entry getValueFromBase(IDBStoreAccessor accessor, CDOID id, int branchID, int index) |
| { |
| IStoreChunkReader chunkReader = createBaseChunkReader(accessor, id, branchID); |
| chunkReader.addSimpleChunk(index); |
| List<Chunk> chunks = chunkReader.executeRead(); |
| return (FeatureMap.Entry)chunks.get(0).get(0); |
| } |
| |
| private IStoreChunkReader createBaseChunkReader(IDBStoreAccessor accessor, CDOID id, int branchID) |
| { |
| InternalRepository repository = (InternalRepository)accessor.getStore().getRepository(); |
| |
| CDOBranchManager branchManager = repository.getBranchManager(); |
| CDOBranch branch = branchManager.getBranch(branchID); |
| CDOBranchPoint base = branch.getBase(); |
| if (base.getBranch() == null) |
| { |
| throw new IllegalArgumentException("Base branch is null: " + branch); |
| } |
| |
| InternalCDORevisionManager revisionManager = repository.getRevisionManager(); |
| InternalCDORevision baseRevision = revisionManager.getRevision(id, base, 0, CDORevision.DEPTH_NONE, true); |
| |
| return accessor.createChunkReader(baseRevision, getFeature()); |
| } |
| |
| public final boolean queryXRefs(IDBStoreAccessor accessor, String mainTableName, String mainTableWhere, |
| QueryXRefsContext context, String idString) |
| { |
| // must never be called (a feature map is not associated with an EReference feature, so XRefs are nor supported |
| // here) |
| throw new ImplementationError("Should never be called!"); |
| } |
| } |
