| /* |
| * 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 |
| * |
| * This class has been derived from AbstractListTableMapping |
| * |
| * Contributors: |
| * Stefan Winkler - initial API and implementation taken from AuditListTableMappingWithRanges |
| * 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.revision.CDOList; |
| import org.eclipse.emf.cdo.common.revision.CDORevision; |
| 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.ITransaction; |
| 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.collection.Pair; |
| import org.eclipse.net4j.util.om.trace.ContextTracer; |
| |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.emf.ecore.EReference; |
| import org.eclipse.emf.ecore.EStructuralFeature; |
| |
| 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; |
| |
| /** |
| * This is a list-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 cdo_version_added and |
| * 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 memopy 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 |
| */ |
| public class BranchingListTableMappingWithRanges extends AbstractBasicListTableMapping |
| implements IListMappingDeltaSupport |
| { |
| private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, BranchingListTableMappingWithRanges.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 type mapping for the value field. |
| */ |
| private ITypeMapping typeMapping; |
| |
| // --------- SQL strings - see initSQLStrings() ----------------- |
| private String sqlSelectChunksPrefix; |
| |
| private String sqlOrderByIndex; |
| |
| private String sqlInsertEntry; |
| |
| private String sqlDeleteEntry; |
| |
| private String sqlRemoveEntry; |
| |
| private String sqlUpdateIndex; |
| |
| private String sqlGetValue; |
| |
| private String sqlClearList; |
| |
| public BranchingListTableMappingWithRanges(IMappingStrategy mappingStrategy, EClass eClass, |
| EStructuralFeature feature) |
| { |
| super(mappingStrategy, eClass, feature); |
| initTable(); |
| initSQLStrings(); |
| } |
| |
| private void initTable() |
| { |
| String tableName = getMappingStrategy().getTableName(getContainingClass(), getFeature()); |
| typeMapping = getMappingStrategy().createValueMapping(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(LIST_REVISION_ID, idType, idLength, true); |
| table.addField(LIST_REVISION_BRANCH, DBType.INTEGER, true); |
| table.addField(LIST_REVISION_VERSION_ADDED, DBType.INTEGER); |
| table.addField(LIST_REVISION_VERSION_REMOVED, DBType.INTEGER); |
| table.addField(LIST_IDX, DBType.INTEGER, true); |
| |
| // TODO think about indexes |
| table.addIndex(Type.NON_UNIQUE, LIST_REVISION_ID, LIST_REVISION_BRANCH, LIST_REVISION_VERSION_ADDED, |
| LIST_REVISION_VERSION_REMOVED, LIST_IDX); |
| |
| typeMapping.createDBField(table, LIST_VALUE); |
| } |
| else |
| { |
| typeMapping.setDBField(table, LIST_VALUE); |
| } |
| } |
| |
| public Collection<IDBTable> getDBTables() |
| { |
| return Collections.singleton(table); |
| } |
| |
| private void initSQLStrings() |
| { |
| String tableName = getTable().getName(); |
| |
| // ---------------- read chunks ---------------------------- |
| StringBuilder builder = new StringBuilder(); |
| builder.append("SELECT "); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append(", "); //$NON-NLS-1$ |
| builder.append(LIST_VALUE); |
| builder.append(" FROM "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_ADDED); |
| builder.append("<=? AND ("); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append(" IS NULL OR "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append(">?)"); //$NON-NLS-1$ |
| sqlSelectChunksPrefix = builder.toString(); |
| |
| sqlOrderByIndex = " ORDER BY " + LIST_IDX; //$NON-NLS-1$ |
| |
| // ----------------- insert entry ----------------- |
| builder = new StringBuilder("INSERT INTO "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append("("); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append(","); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append(","); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_ADDED); |
| builder.append(","); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append(","); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append(","); //$NON-NLS-1$ |
| builder.append(LIST_VALUE); |
| builder.append(") VALUES (?, ?, ?, ?, ?, ?)"); //$NON-NLS-1$ |
| sqlInsertEntry = builder.toString(); |
| |
| // ----------------- remove current entry ----------------- |
| builder = new StringBuilder("UPDATE "); //$NON-NLS-1$ |
| builder.append(getTable()); |
| builder.append(" SET "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append("=? "); //$NON-NLS-1$ |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_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(getTable()); |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_ADDED); |
| builder.append("=?"); //$NON-NLS-1$ |
| sqlDeleteEntry = builder.toString(); |
| |
| // ----------------- update index ----------------- |
| builder = new StringBuilder("UPDATE "); //$NON-NLS-1$ |
| builder.append(getTable()); |
| builder.append(" SET "); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append("=? WHERE "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_ADDED); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append("=?"); //$NON-NLS-1$ |
| sqlUpdateIndex = builder.toString(); |
| |
| // ----------------- get current value ----------------- |
| builder = new StringBuilder("SELECT "); //$NON-NLS-1$ |
| builder.append(LIST_VALUE); |
| builder.append(" FROM "); //$NON-NLS-1$ |
| builder.append(getTable()); |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append(" IS NULL"); //$NON-NLS-1$ |
| sqlGetValue = builder.toString(); |
| |
| // ----------- clear list items ------------------------- |
| builder = new StringBuilder("UPDATE "); //$NON-NLS-1$ |
| builder.append(getTable()); |
| builder.append(" SET "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append("=? "); //$NON-NLS-1$ |
| builder.append(" WHERE "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_BRANCH); |
| builder.append("=? AND "); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_VERSION_REMOVED); |
| builder.append(" IS NULL"); //$NON-NLS-1$ |
| sqlClearList = builder.toString(); |
| } |
| |
| protected final IDBTable getTable() |
| { |
| return table; |
| } |
| |
| protected final ITypeMapping getTypeMapping() |
| { |
| return typeMapping; |
| } |
| |
| public void readValues(IDBStoreAccessor accessor, InternalCDORevision revision, final 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; |
| } |
| |
| CDOID id = revision.getID(); |
| int branchID = revision.getBranch().getID(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading list values for feature {0}.{1} of {2}", getContainingClass().getName(), //$NON-NLS-1$ |
| getFeature().getName(), revision); |
| } |
| |
| String sql = sqlSelectChunksPrefix + sqlOrderByIndex; |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sql, ReuseProbability.HIGH); |
| ResultSet resultSet = null; |
| ArrayList<Pair<Integer, Integer>> toReadFromBase = null; // list of chunks to be read from base revision |
| |
| try |
| { |
| 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 (toReadFromBase == null) |
| { |
| toReadFromBase = new ArrayList<Pair<Integer, Integer>>(); |
| } |
| toReadFromBase.add(Pair.create(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; |
| } |
| |
| Object value = typeMapping.readValue(resultSet); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Read value for index {0} from result set: {1}", currentIndex, value); //$NON-NLS-1$ |
| } |
| |
| list.set(currentIndex++, value); |
| valuesToRead--; |
| } |
| |
| if (valuesToRead > 0) |
| { |
| if (toReadFromBase == null) |
| { |
| toReadFromBase = new ArrayList<Pair<Integer, Integer>>(); |
| } |
| toReadFromBase.add(Pair.create(currentIndex, currentIndex + valuesToRead)); |
| } |
| } |
| catch (SQLException ex) |
| { |
| throw new DBException(ex); |
| } |
| finally |
| { |
| DBUtil.close(resultSet); |
| DBUtil.close(stmt); |
| } |
| |
| // read missing values from base revision ... |
| if (toReadFromBase != null) |
| { |
| IStoreChunkReader baseReader = createBaseChunkReader(accessor, id, branchID); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading base revision chunks for feature {0}.{1} of {2} from base revision {3}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), revision, baseReader.getRevision()); |
| } |
| |
| for (Pair<Integer, Integer> range : toReadFromBase) |
| { |
| baseReader.addRangedChunk(range.getElement1(), range.getElement2()); |
| } |
| |
| List<Chunk> baseChunks = baseReader.executeRead(); |
| for (Chunk chunk : baseChunks) |
| { |
| int startIndex = chunk.getStartIndex(); |
| for (int i = 0; i < chunk.size(); i++) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Copying value {0} at chunk index {1}+{2} to index {3}", //$NON-NLS-1$ |
| chunk.get(i), startIndex, i, startIndex + i); |
| } |
| |
| list.set(startIndex + i, chunk.get(i)); |
| } |
| } |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading {3} list values done for feature {0}.{1} of {2}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), revision, list.size()); |
| } |
| } |
| |
| public final void readChunks(IDBStoreChunkReader chunkReader, List<Chunk> chunks, String where) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Reading list chunk values for feature {0}.{1} of {2}", getContainingClass().getName(), //$NON-NLS-1$ |
| getFeature().getName(), chunkReader.getRevision()); |
| } |
| |
| CDORevision revision = chunkReader.getRevision(); |
| CDOID id = revision.getID(); |
| int branchID = revision.getBranch().getID(); |
| |
| 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, id); |
| stmt.setInt(2, branchID); |
| stmt.setInt(3, revision.getVersion()); |
| stmt.setInt(4, revision.getVersion()); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Readung Chunks: {0}", stmt); //$NON-NLS-1$ |
| } |
| |
| 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(), id, branchID); |
| } |
| |
| 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 |
| Object value = typeMapping.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, 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(), id, branchID); |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Scheduling range {0}-{1} to be read from base revision", missingValueStartIndex, //$NON-NLS-1$ |
| chunk.getStartIndex() + chunk.size()); |
| } |
| |
| 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 thisChunk, but startIndex of baseChunk may be higher. |
| // therefore calculate offset |
| int offset = baseStartIndex - thisChunk.getStartIndex(); |
| |
| // and copy values. |
| for (int i = 0; i < baseChunk.size(); i++) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Copying base chunk reader value {0} at index {1} to current chunk reader at index {2}.", |
| baseChunk.get(i), baseChunk.getStartIndex() + i, thisChunk.getStartIndex() + i + offset); |
| } |
| |
| 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}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), 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 index, Object value) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Writing value for feature {0}.{1} index {2} of {3} : {4}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, revision, value); |
| } |
| |
| addEntry(accessor, revision.getID(), revision.getBranch().getID(), revision.getVersion(), index, value); |
| } |
| |
| /** |
| * 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 |
| * @param lastIndex |
| */ |
| public void clearList(IDBStoreAccessor accessor, CDOID id, int branchId, int oldVersion, int newVersion, |
| int lastIndex) |
| { |
| // 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)); |
| } |
| } |
| |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlClearList, ReuseProbability.HIGH); |
| |
| try |
| { |
| // clear rest of the list |
| stmt.setInt(1, newVersion); |
| getMappingStrategy().getStore().getIDHandler().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) |
| { |
| ITransaction transaction = accessor.getTransaction(); |
| InternalCDORevision revision = (InternalCDORevision)transaction.getRevision(id); |
| if (revision == null) |
| { |
| // This must be an attempt to resurrect an object, i.e., revise its detached revision |
| return; |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("objectDetached {1}", revision); //$NON-NLS-1$ |
| } |
| |
| int branchID = transaction.getBranch().getID(); |
| int version = revision.getVersion(); |
| int lastIndex = revision.getList(getFeature()).size() - 1; |
| |
| clearList(accessor, id, branchID, version, FINAL_VERSION, lastIndex); |
| } |
| |
| @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, final 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); |
| |
| 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); |
| } |
| |
| visitor.finishPendingRemove(); |
| } |
| |
| /** |
| * @author Stefan Winkler |
| * @author Andras Peteri |
| */ |
| private class ListDeltaVisitor implements CDOFeatureDeltaVisitor |
| { |
| private IDBStoreAccessor accessor; |
| |
| private CDOID id; |
| |
| private int branchID; |
| |
| private int oldVersion; |
| |
| private int newVersion; |
| |
| private int lastIndex; |
| |
| private int lastRemovedIndex; |
| |
| public ListDeltaVisitor(IDBStoreAccessor accessor, InternalCDORevision originalRevision, int targetBranchID, |
| int oldVersion, int newVersion) |
| { |
| this.accessor = accessor; |
| id = originalRevision.getID(); |
| branchID = targetBranchID; |
| this.oldVersion = oldVersion; |
| this.newVersion = newVersion; |
| lastIndex = originalRevision.getList(getFeature()).size() - 1; |
| lastRemovedIndex = -1; |
| } |
| |
| public void visit(CDOAddFeatureDelta delta) |
| { |
| finishPendingRemove(); |
| 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()); |
| |
| ++lastIndex; |
| } |
| |
| public void visit(CDORemoveFeatureDelta delta) |
| { |
| finishPendingRemove(); |
| lastRemovedIndex = delta.getIndex(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Removing at: {0}", lastRemovedIndex); //$NON-NLS-1$ |
| } |
| |
| // remove the item |
| removeEntry(accessor, id, branchID, oldVersion, newVersion, lastRemovedIndex); |
| } |
| |
| public void visit(CDOSetFeatureDelta delta) |
| { |
| finishPendingRemove(); |
| 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); |
| |
| // create the item |
| addEntry(accessor, id, branchID, newVersion, index, delta.getValue()); |
| } |
| |
| 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); |
| lastIndex = -1; |
| lastRemovedIndex = -1; |
| } |
| |
| public void visit(CDOClearFeatureDelta delta) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Clearing"); //$NON-NLS-1$ |
| } |
| |
| clearList(accessor, id, branchID, oldVersion, newVersion, lastIndex); |
| lastIndex = -1; |
| lastRemovedIndex = -1; |
| } |
| |
| public void visit(CDOMoveFeatureDelta delta) |
| { |
| int fromIdx = delta.getOldPosition(); |
| int toIdx = delta.getNewPosition(); |
| |
| // optimization: a move from the end of the list to an index that was just removed requires no shifting |
| boolean optimizeMove = lastRemovedIndex != -1 && fromIdx == lastIndex - 1 && toIdx == lastRemovedIndex; |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Delta Moving: {0} to {1}", fromIdx, toIdx); //$NON-NLS-1$ |
| } |
| |
| // items after a pending remove have an index offset by one |
| if (optimizeMove) |
| { |
| fromIdx++; |
| } |
| else |
| { |
| finishPendingRemove(); |
| } |
| |
| Object value = getValue(accessor, id, branchID, fromIdx, true); |
| |
| // remove the item |
| removeEntry(accessor, id, branchID, oldVersion, newVersion, fromIdx); |
| |
| // adjust indexes and shift either up or down for regular moves |
| if (!optimizeMove) |
| { |
| 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); |
| } |
| } |
| else |
| { |
| // finish the optimized move by resetting lastRemovedIndex |
| lastRemovedIndex = -1; |
| --lastIndex; |
| } |
| |
| // create the item |
| addEntry(accessor, id, branchID, newVersion, toIdx, value); |
| } |
| |
| public void visit(CDOListFeatureDelta delta) |
| { |
| throw new ImplementationError("Should not be called"); //$NON-NLS-1$ |
| } |
| |
| public void visit(CDOContainerFeatureDelta delta) |
| { |
| throw new ImplementationError("Should not be called"); //$NON-NLS-1$ |
| } |
| |
| public void finishPendingRemove() |
| { |
| if (lastRemovedIndex != -1) |
| { |
| int startIndex = lastRemovedIndex; |
| int endIndex = lastIndex; |
| |
| // make room for the new item |
| moveOneUp(accessor, id, branchID, oldVersion, newVersion, startIndex + 1, endIndex); |
| |
| --lastIndex; |
| lastRemovedIndex = -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, 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("moveOneUp updated: {0} -> {1}", index, index - 1); //$NON-NLS-1$ |
| } |
| |
| break; |
| // no entry for current revision there. |
| 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); |
| } |
| 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); |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneUp add: {0}", index - 1); //$NON-NLS-1$ |
| } |
| |
| addEntry(accessor, id, branchId, newVersion, index - 1, value); |
| 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); |
| } |
| 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); |
| } |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("moveOneDown add: {0}", index + 1); //$NON-NLS-1$ |
| } |
| |
| addEntry(accessor, id, branchId, newVersion, index + 1, value); |
| 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) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Adding value for feature {0}.{1} index {2} of {3}:{4}v{5} : {6}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, branchId, version, value); |
| } |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlInsertEntry, ReuseProbability.HIGH); |
| |
| try |
| { |
| int column = 1; |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, version); // versionAdded |
| stmt.setNull(column++, DBType.INTEGER.getCode()); // versionRemoved |
| stmt.setInt(column++, index); |
| typeMapping.setValue(stmt, column++, value); |
| |
| 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) |
| { |
| 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); |
| } |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlInsertEntry, ReuseProbability.HIGH); |
| |
| try |
| { |
| int column = 1; |
| idHandler.setCDOID(stmt, column++, id); |
| stmt.setInt(column++, branchId); |
| stmt.setInt(column++, versionAdded); // versionAdded |
| stmt.setInt(column++, versionRemoved); // versionRemoved |
| stmt.setInt(column++, index); |
| typeMapping.setValue(stmt, column++, value); |
| |
| 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) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Removing value for feature {0}.{1} index {2} of {3}:{4}v{5}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, branchId, 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); |
| } |
| } |
| } |
| catch (SQLException e) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Removing value for feature {0}.{1} index {2} of {3}:{4}v{5} FAILED {6}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, branchId, 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}:{4}v{5} FAILED {6}", //$NON-NLS-1$ |
| getContainingClass().getName(), getFeature().getName(), index, id, branchId, newVersion, e.getMessage()); |
| } |
| |
| throw new DBException(e); |
| } |
| finally |
| { |
| DBUtil.close(stmt); |
| } |
| } |
| |
| /** |
| * Read a single value from the current revision's list. |
| * |
| * @param accessor |
| * the store accessor |
| * @param id |
| * the revision's ID |
| * @param branchId |
| * the revision's branch ID |
| * @param index |
| * the index from which to get the value |
| * @param getFromBase |
| * if <code>true</code>, the value is recursively loaded from the base revision of a branch, if it is not |
| * present in the current branch (because it has not been changed since the branch fork). If |
| * <code>false</code>, <code>null</code> is returned in the former case. |
| */ |
| private Object getValue(IDBStoreAccessor accessor, CDOID id, int branchId, int index, boolean getFromBase) |
| { |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sqlGetValue, ReuseProbability.HIGH); |
| Object 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()) |
| { |
| result = typeMapping.readValue(resultSet); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Read value (index {0}) from result set: {1}", index, result); //$NON-NLS-1$ |
| } |
| } |
| else |
| { |
| // value is not in this branch. |
| // -> read from base revision |
| if (getFromBase) |
| { |
| result = getValueFromBase(accessor, id, branchId, index); |
| } // else: result remains null |
| } |
| } |
| 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 Object getValueFromBase(IDBStoreAccessor accessor, CDOID id, int branchID, int index) |
| { |
| IStoreChunkReader chunkReader = createBaseChunkReader(accessor, id, branchID); |
| chunkReader.addSimpleChunk(index); |
| List<Chunk> chunks = chunkReader.executeRead(); |
| return 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) |
| { |
| |
| String tableName = getTable().getName(); |
| String listJoin = getMappingStrategy().getListJoin("a_t", "l_t"); |
| |
| StringBuilder builder = new StringBuilder(); |
| builder.append("SELECT l_t."); //$NON-NLS-1$ |
| builder.append(LIST_REVISION_ID); |
| builder.append(", l_t."); //$NON-NLS-1$ |
| builder.append(LIST_VALUE); |
| builder.append(", l_t."); //$NON-NLS-1$ |
| builder.append(LIST_IDX); |
| builder.append(" FROM "); //$NON-NLS-1$ |
| builder.append(tableName); |
| builder.append(" l_t, ");//$NON-NLS-1$ |
| builder.append(mainTableName); |
| builder.append(" a_t WHERE ");//$NON-NLS-1$ |
| builder.append("a_t." + mainTableWhere);//$NON-NLS-1$ |
| builder.append(listJoin); |
| builder.append(" AND "); //$NON-NLS-1$ |
| builder.append(LIST_VALUE); |
| builder.append(" IN "); //$NON-NLS-1$ |
| builder.append(idString); |
| String sql = builder.toString(); |
| |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format("Query XRefs (list): {0}", sql); |
| } |
| |
| IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler(); |
| IDBPreparedStatement stmt = accessor.getDBConnection().prepareStatement(sql, ReuseProbability.MEDIUM); |
| ResultSet resultSet = null; |
| |
| try |
| { |
| resultSet = stmt.executeQuery(); |
| while (resultSet.next()) |
| { |
| CDOID sourceID = idHandler.getCDOID(resultSet, 1); |
| CDOID targetID = idHandler.getCDOID(resultSet, 2); |
| int idx = resultSet.getInt(3); |
| |
| boolean more = context.addXRef(targetID, sourceID, (EReference)getFeature(), idx); |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format(" add XRef to context: src={0}, tgt={1}, idx={2}", sourceID, targetID, idx); |
| } |
| |
| if (!more) |
| { |
| if (TRACER.isEnabled()) |
| { |
| TRACER.format(" result limit reached. Ignoring further results."); |
| } |
| |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| catch (SQLException ex) |
| { |
| throw new DBException(ex); |
| } |
| finally |
| { |
| DBUtil.close(resultSet); |
| DBUtil.close(stmt); |
| } |
| } |
| } |
