diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-20060522/java/das/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ChangeFactory.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-20060522/java/das/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ChangeFactory.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-20060522/java/das/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ChangeFactory.java b/sca-java-1.x/tags/java-M1-20060522/java/das/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ChangeFactory.java new file mode 100644 index 0000000000..c56c55c636 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-20060522/java/das/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/ChangeFactory.java @@ -0,0 +1,199 @@ +/** +* +* Copyright 2005 The Apache Software Foundation or its licensors, as applicable. +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ +package org.apache.tuscany.das.rdb.impl; + +import java.util.Iterator; + +import org.apache.tuscany.das.rdb.SDODataTypes; +import org.apache.tuscany.das.rdb.config.Table; +import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper; +import org.apache.tuscany.das.rdb.config.wrapper.TableWrapper; +import org.apache.tuscany.das.rdb.generator.impl.CudGenerator; +import org.apache.tuscany.das.rdb.util.DebugUtil; + +import commonj.sdo.DataObject; +import commonj.sdo.Property; +import commonj.sdo.Type; + +public class ChangeFactory { + + private final Type type; + + private InsertCommandImpl createCommand; + + private UpdateCommandImpl updateCommand; + + private DeleteCommandImpl deleteCommand; + + private static final boolean debug = false; + + private CudGenerator cudGenerator; + + private final MappingWrapper mapping; + + private final ConnectionImpl connection; + + public ChangeFactory(Type type, MappingWrapper mapping, ConnectionImpl connection) { + this.type = type; + this.mapping = mapping; + this.connection = connection; + } + + public Type getType() { + return this.type; + } + + public void setCreateCommand(InsertCommandImpl cmd) { + createCommand = cmd; + } + + public void setUpdateCommand(UpdateCommandImpl cmd) { + DebugUtil.debugln(getClass(), debug, "Setting Update Command to " + cmd); + updateCommand = cmd; + } + + public void setDeleteCommand(DeleteCommandImpl cmd) { + deleteCommand = cmd; + } + + private CudGenerator getCudGenerator() { + if (this.cudGenerator == null) + this.cudGenerator = new CudGenerator(); + return this.cudGenerator; + } + + ChangeOperation createUpdateOperation(DataObject changedObject, String propagatedID) { + return new UpdateOperation(getUpdateCommand(changedObject), changedObject, propagatedID); + } + ChangeOperation createUpdateOperation(DataObject changedObject) { + return createUpdateOperation(changedObject, null); + } + + ChangeOperation createDeleteOperation(DataObject changedObject) { + return new DeleteOperation(getDeleteCommand(changedObject), changedObject); + } + + ChangeOperation createInsertOperation(DataObject changedObject, String propagatedID) { + return new CreateOperation(getCreateCommand(changedObject), changedObject, propagatedID); + } + + ChangeOperation createInsertOperation(DataObject changedObject) { + return createInsertOperation(changedObject, null); + } + + + private InsertCommandImpl getCreateCommand(DataObject changedObject) { + + if ( createCommand == null ) { + Table table = mapping.getTableByPropertyName(changedObject.getType().getName()); + if (table == null ) { + if (changedObject.getType().getProperty("ID") != null ) { + // If the table is not defined in the config, assume it has a primary key of "ID" + mapping.addPrimaryKey(changedObject.getType().getName() + ".ID"); + table = mapping.getTableByPropertyName(changedObject.getType().getName()); + } else { + throw new RuntimeException("Table " + changedObject.getType().getName() + " was changed in the DataGraph but is not present in the Config"); + } + } + + + String createStatement = table.getCreate(); + if ( createStatement == null ) { + createCommand = getCudGenerator().getInsertCommand(mapping, changedObject, table); + } else { + createCommand = new InsertCommandImpl(createStatement); + Iterator i = getCudGenerator().getCreateParameters(mapping, changedObject, table).iterator(); + while (i.hasNext()) { + Property p = (Property)i.next(); + createCommand.addParameter(p.getName(), p.getType()); + } + } + createCommand.setConnection(connection); + createCommand.configWrapper = mapping; + } + return createCommand; + } + + private DeleteCommandImpl getDeleteCommand(DataObject changedObject) { + + if ( deleteCommand == null ) { + Table table = mapping.getTableByPropertyName(changedObject.getType().getName()); + if (table == null ) { + if (changedObject.getType().getProperty("ID") != null ) { + // If the table is not defined in the config, assume it has a primary key of "ID" + mapping.addPrimaryKey(changedObject.getType().getName() + ".ID"); + table = mapping.getTableByPropertyName(changedObject.getType().getName()); + } else { + throw new RuntimeException("Table " + changedObject.getType().getName() + " was changed in the DataGraph but is not present in the Config"); + } + } + + String deleteStatement = table.getDelete(); + if ( deleteStatement == null ) { + deleteCommand = getCudGenerator().getDeleteCommand(table); + } else { + deleteCommand = new DeleteCommandImpl(deleteStatement); + Iterator i = getCudGenerator().getDeleteParameters(table).iterator(); + while (i.hasNext()) { + deleteCommand.addParameter((String)i.next(), SDODataTypes.OBJECT); + } + } + deleteCommand.setConnection(connection); + } + return deleteCommand; + } + + private UpdateCommandImpl getUpdateCommand(DataObject changedObject) { + + if ( updateCommand == null ) { + Table table = mapping.getTableByPropertyName(changedObject.getType().getName()); + if (table == null ) { + if (changedObject.getType().getProperty("ID") != null ) { + // If the table is not defined in the config, assume it has a primary key of "ID" + mapping.addPrimaryKey(changedObject.getType().getName() + ".ID"); + table = mapping.getTableByPropertyName(changedObject.getType().getName()); + } else { + throw new RuntimeException("Table " + changedObject.getType().getName() + " was changed in the DataGraph but is not present in the Config"); + } + } + String updateStatement = table.getUpdate(); + if ( updateStatement == null ) { + updateCommand = getCudGenerator().getUpdateCommand(mapping, changedObject,table); + } else { + TableWrapper t = new TableWrapper(table); + if ( t.getCollisionColumn() != null ) + updateCommand = new OptimisticWriteCommandImpl(updateStatement); + else + updateCommand = new UpdateCommandImpl(updateStatement); + + + updateCommand.addParameters(getCudGenerator().getUpdateParameters(changedObject, table)); + + } + updateCommand.setConnection(connection); + updateCommand.configWrapper = mapping; + } + DebugUtil.debugln(getClass(), debug, "Returning updateCommand: " + updateCommand); + return updateCommand; + } + + public MappingWrapper getConfig() { + return this.mapping; + } + + +} |