| Clover Coverage Report - Impex Parent 1.0.21-SNAPSHOT (Aggregated) |
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| ConstraintNameGenerator | Line # 37 | 15 | 0% | 5 | 20 | 0% |
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| 1 | package org.apache.torque.engine.database.model; | |
| 2 | ||
| 3 | /* | |
| 4 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 5 | * or more contributor license agreements. See the NOTICE file | |
| 6 | * distributed with this work for additional information | |
| 7 | * regarding copyright ownership. The ASF licenses this file | |
| 8 | * to you under the Apache License, Version 2.0 (the | |
| 9 | * "License"); you may not use this file except in compliance | |
| 10 | * with the License. You may obtain a copy of the License at | |
| 11 | * | |
| 12 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 13 | * | |
| 14 | * Unless required by applicable law or agreed to in writing, | |
| 15 | * software distributed under the License is distributed on an | |
| 16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 17 | * KIND, either express or implied. See the License for the | |
| 18 | * specific language governing permissions and limitations | |
| 19 | * under the License. | |
| 20 | */ | |
| 21 | ||
| 22 | import java.util.List; | |
| 23 | ||
| 24 | import org.apache.commons.logging.Log; | |
| 25 | import org.apache.commons.logging.LogFactory; | |
| 26 | ||
| 27 | import org.apache.torque.engine.EngineException; | |
| 28 | ||
| 29 | /** | |
| 30 | * A <code>NameGenerator</code> implementation for table-specific | |
| 31 | * constraints. Conforms to the maximum column name length for the | |
| 32 | * type of database in use. | |
| 33 | * | |
| 34 | * @author <a href="mailto:dlr@finemaltcoding.com>Daniel Rall</a> | |
| 35 | * @version $Id: ConstraintNameGenerator.java,v 1.1 2007-10-21 07:57:27 abyrne Exp $ | |
| 36 | */ | |
| 37 | public class ConstraintNameGenerator implements NameGenerator | |
| 38 | { | |
| 39 | /** Logging class from commons.logging */ | |
| 40 | private static Log log = LogFactory.getLog(ConstraintNameGenerator.class); | |
| 41 | ||
| 42 | /** | |
| 43 | * First element of <code>inputs</code> should be of type {@link | |
| 44 | * org.apache.torque.engine.database.model.Database}, second | |
| 45 | * should be a table name, third is the type identifier (spared if | |
| 46 | * trimming is necessary due to database type length constraints), | |
| 47 | * and the fourth is a <code>Integer</code> indicating the number | |
| 48 | * of this contraint. | |
| 49 | * | |
| 50 | * @see org.apache.torque.engine.database.model.NameGenerator | |
| 51 | */ | |
| 52 | 0 |
 public String generateName(List inputs) |
| 53 | throws EngineException | |
| 54 | { | |
| 55 | 0 | StringBuffer name = new StringBuffer(); |
| 56 | 0 | Database db = (Database) inputs.get(0); |
| 57 | 0 | name.append((String) inputs.get(1)); |
| 58 | 0 | String namePostfix = (String) inputs.get(2); |
| 59 | 0 | String constraintNbr = inputs.get(3).toString(); |
| 60 | ||
| 61 | // Calculate maximum RDBMS-specific column character limit. | |
| 62 | 0 | int maxBodyLength = -1; |
| 63 | 0 | try |
| 64 | { | |
| 65 | 0 | int maxColumnNameLength = db.getPlatform().getMaxColumnNameLength(); |
| 66 | 0 | maxBodyLength = (maxColumnNameLength - namePostfix.length() |
| 67 | - constraintNbr.length() - 2); | |
| 68 | ||
| 69 | 0 | if (log.isDebugEnabled()) |
| 70 | { | |
| 71 | 0 | log.debug("maxColumnNameLength=" + maxColumnNameLength |
| 72 | + " maxBodyLength=" + maxBodyLength); | |
| 73 | } | |
| 74 | } | |
| 75 | catch (NumberFormatException maxLengthUnknown) | |
| 76 | { | |
| 77 | } | |
| 78 | ||
| 79 | // Do any necessary trimming. | |
| 80 | 0 | if (maxBodyLength != -1 && name.length() > maxBodyLength) |
| 81 | { | |
| 82 | 0 | name.setLength(maxBodyLength); |
| 83 | } | |
| 84 | ||
| 85 | 0 | name.append(STD_SEPARATOR_CHAR).append(namePostfix) |
| 86 | .append(STD_SEPARATOR_CHAR).append(constraintNbr); | |
| 87 | ||
| 88 | 0 | return name.toString(); |
| 89 | } | |
| 90 | } | |
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