| /* |
| |
| Derby - Class org.apache.derby.iapi.sql.dictionary.TupleDescriptor |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to you under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| |
| package org.apache.derby.iapi.sql.dictionary; |
| |
| import org.apache.derby.catalog.DependableFinder; |
| import org.apache.derby.shared.common.sanity.SanityManager; |
| |
| /** |
| * This is the superclass of all Descriptors. Users of DataDictionary should use |
| * the specific descriptor. |
| * |
| */ |
| |
| public class TupleDescriptor |
| { |
| ////////////////////////////////////////////////////////////////// |
| // |
| // CONSTANTS |
| // |
| ////////////////////////////////////////////////////////////////// |
| |
| |
| ////////////////////////////////////////////////////////////////// |
| // |
| // STATE |
| // |
| ////////////////////////////////////////////////////////////////// |
| |
| private DataDictionary dataDictionary; |
| |
| ////////////////////////////////////////////////////////////////// |
| // |
| // CONSTRUCTOR |
| // |
| ////////////////////////////////////////////////////////////////// |
| |
| public TupleDescriptor() {} |
| |
| public TupleDescriptor(DataDictionary dataDictionary) |
| { |
| this.dataDictionary = dataDictionary; |
| } |
| |
| protected DataDictionary getDataDictionary() |
| { |
| return dataDictionary; |
| } |
| |
| protected void setDataDictionary(DataDictionary dd) |
| { |
| dataDictionary = dd; |
| } |
| |
| /** |
| * Is this provider persistent? A stored dependency will be required |
| * if both the dependent and provider are persistent. |
| * |
| * @return boolean Whether or not this provider is persistent. |
| */ |
| public boolean isPersistent() |
| { |
| return true; |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////// |
| // |
| // BEHAVIOR. These are only used by Replication!! |
| // |
| ////////////////////////////////////////////////////////////////// |
| |
| |
| DependableFinder getDependableFinder(int formatId) |
| { |
| return dataDictionary.getDependableFinder(formatId); |
| } |
| |
| DependableFinder getColumnDependableFinder(int formatId, byte[] |
| columnBitMap) |
| { |
| return dataDictionary.getColumnDependableFinder(formatId, columnBitMap); |
| } |
| |
| /** Each descriptor must identify itself with its type; i.e index, check |
| * constraint whatever. |
| */ |
| public String getDescriptorType() |
| { |
| if (SanityManager.DEBUG) {SanityManager.NOTREACHED(); } |
| return null; |
| } |
| /* each descriptor has a name |
| */ |
| public String getDescriptorName() |
| { |
| if (SanityManager.DEBUG) {SanityManager.NOTREACHED(); } |
| return null; |
| } |
| } |