| /* |
| * 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.openjpa.jdbc.meta.strats; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.openjpa.jdbc.schema.Column; |
| import org.apache.openjpa.meta.JavaTypes; |
| |
| /** |
| * Uses a version number for optimistic versioning. |
| * |
| * @author Abe White |
| */ |
| public class NumberVersionStrategy |
| extends ColumnVersionStrategy { |
| |
| |
| private static final long serialVersionUID = 1L; |
| |
| public static final String ALIAS = "version-number"; |
| |
| private Number _initial = 1; |
| private Integer _javaType = null; |
| |
| /** |
| * Set the initial value for version column. Defaults to 1. |
| */ |
| public void setInitialValue(int initial) { |
| _initial = initial; |
| } |
| |
| /** |
| * Return the initial value for version column. Defaults to 1. |
| */ |
| public int getInitialValue() { |
| return _initial.intValue(); |
| } |
| |
| @Override |
| public String getAlias() { |
| return ALIAS; |
| } |
| |
| @Override |
| protected int getJavaType() { |
| if (_javaType == null && vers.getClassMapping().getVersionFieldMapping() != null) { |
| _javaType = vers.getClassMapping().getVersionFieldMapping().getTypeCode(); |
| } else { |
| return JavaTypes.INT; |
| } |
| |
| return _javaType; |
| } |
| |
| @Override |
| protected Object nextVersion(Object version) { |
| if (version == null) |
| return _initial; |
| return ((Number) version).intValue() + 1; |
| } |
| |
| @Override |
| public Map<Column,String> getBulkUpdateValues() { |
| Column[] cols = vers.getColumns(); |
| Map<Column,String> map = new HashMap<>(cols.length); |
| for (Column col : cols) { |
| map.put(col, col.getName() + " + 1"); |
| } |
| return map; |
| } |
| } |