[23] | 1 | /* |
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| 2 | * fmgVen - A Convention over Configuration Java ORM Tool |
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| 3 | * Copyright 2010 Fatih Mehmet Güler |
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| 4 | * |
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| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 6 | * you may not use this file except in compliance with the License. |
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| 7 | * You may obtain a copy of the License at |
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| 8 | * |
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 10 | * |
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| 11 | * Unless required by applicable law or agreed to in writing, software |
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 14 | * See the License for the specific language governing permissions and |
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| 15 | * limitations under the License. |
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| 16 | * under the License. |
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| 17 | */ |
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| 18 | package com.fmguler.ven; |
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| 19 | |
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[26] | 20 | import com.fmguler.ven.util.Convert; |
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| 21 | import java.beans.PropertyDescriptor; |
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| 22 | import java.util.Date; |
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[23] | 23 | import java.util.HashSet; |
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| 24 | import java.util.Set; |
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[26] | 25 | import org.springframework.beans.BeanWrapper; |
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| 26 | import org.springframework.beans.BeanWrapperImpl; |
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[23] | 27 | |
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| 28 | /** |
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| 29 | * Generates queries in the form of 'Convention over Configuration' of the specified class. |
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| 30 | * @author Fatih Mehmet Güler |
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| 31 | */ |
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| 32 | public class QueryGenerator { |
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| 33 | private Set domainPackages; |
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[26] | 34 | private Set dbClasses; |
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[23] | 35 | |
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| 36 | public QueryGenerator() { |
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| 37 | domainPackages = new HashSet(); |
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[26] | 38 | dbClasses = new HashSet(); |
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| 39 | //the predefined database classes; |
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| 40 | this.dbClasses.add(Integer.class); |
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| 41 | this.dbClasses.add(String.class); |
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| 42 | this.dbClasses.add(Date.class); |
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| 43 | this.dbClasses.add(Double.class); |
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| 44 | this.dbClasses.add(Boolean.class); |
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[23] | 45 | } |
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| 46 | |
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| 47 | public String generateSelectQuery() { |
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| 48 | return null; |
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| 49 | } |
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| 50 | |
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| 51 | public String generateCountQuery() { |
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| 52 | return null; |
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| 53 | } |
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| 54 | |
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[26] | 55 | public String generateInsertQuery(Object object) throws VenException { |
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| 56 | BeanWrapper wr = new BeanWrapperImpl(object); |
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| 57 | String objectName = Convert.toSimpleName(object.getClass().getName()); |
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| 58 | String tableName = Convert.toDB(objectName); |
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| 59 | PropertyDescriptor[] pdArr = wr.getPropertyDescriptors(); |
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| 60 | |
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| 61 | //generate insert query |
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| 62 | StringBuffer query = new StringBuffer("insert into " + tableName + "("); |
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| 63 | StringBuffer values = new StringBuffer(" values("); |
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| 64 | for (int i = 0; i < pdArr.length; i++) { |
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| 65 | Class fieldClass = pdArr[i].getPropertyType(); //field class |
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| 66 | String columnName = Convert.toDB(pdArr[i].getName()); //column name |
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| 67 | String fieldName = pdArr[i].getName(); //field name |
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| 68 | //if (fieldName.equals("id")) continue; //remove if it does not break the sequence |
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| 69 | if (dbClasses.contains(fieldClass)) { //direct database field (Integer,String,Date, etc) |
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| 70 | query.append(columnName); |
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| 71 | query.append(","); |
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| 72 | values.append(":").append(fieldName); |
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| 73 | values.append(","); |
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| 74 | } |
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| 75 | if (fieldClass.getPackage() != null && domainPackages.contains(fieldClass.getPackage().getName())) { //object |
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| 76 | query.append(Convert.toDB(fieldName)).append("_id"); |
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| 77 | query.append(","); |
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| 78 | values.append(":").append(fieldName).append(".id"); |
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| 79 | values.append(","); |
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| 80 | } |
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| 81 | } |
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| 82 | query.deleteCharAt(query.length() - 1); |
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| 83 | query.append(")"); |
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| 84 | values.deleteCharAt(values.length() - 1); |
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| 85 | values.append(");"); |
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| 86 | query.append(values); |
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| 87 | |
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| 88 | return query.toString(); |
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[23] | 89 | } |
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| 90 | |
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[26] | 91 | /** |
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| 92 | * Generates insert/update query |
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| 93 | * @return the insert update SQL query |
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| 94 | */ |
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| 95 | public String generateUpdateQuery(Object object) throws VenException { |
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| 96 | BeanWrapper wr = new BeanWrapperImpl(object); |
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| 97 | String objectName = Convert.toSimpleName(object.getClass().getName()); |
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| 98 | String tableName = Convert.toDB(objectName); |
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| 99 | PropertyDescriptor[] pdArr = wr.getPropertyDescriptors(); |
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| 100 | |
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| 101 | StringBuffer query = new StringBuffer("update " + tableName + " set "); |
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| 102 | for (int i = 0; i < pdArr.length; i++) { |
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| 103 | Class fieldClass = pdArr[i].getPropertyType(); //field class |
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| 104 | String columnName = Convert.toDB(pdArr[i].getName()); //column name |
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| 105 | String fieldName = pdArr[i].getName(); //field name |
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| 106 | if (dbClasses.contains(fieldClass)) { //direct database field (Integer,String,Date, etc) |
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| 107 | query.append(columnName).append("=:").append(fieldName); |
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| 108 | query.append(","); |
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| 109 | } |
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| 110 | if (fieldClass.getPackage() != null && domainPackages.contains(fieldClass.getPackage().getName())) { //object |
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| 111 | query.append(columnName).append("_id=:").append(fieldName).append(".id"); |
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| 112 | query.append(","); |
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| 113 | } |
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| 114 | } |
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| 115 | query.deleteCharAt(query.length() - 1); |
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| 116 | query.append(" where id = :id ;"); //TODO: remove the last comma |
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| 117 | return query.toString(); |
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| 118 | } |
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| 119 | |
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| 120 | public String generateSequenceQuery(Object object) throws VenException { |
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| 121 | String objectName = Convert.toSimpleName(object.getClass().getName()); |
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| 122 | String tableName = Convert.toDB(objectName); |
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| 123 | return "select nextval('" + tableName + "_id_seq');"; |
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| 124 | } |
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| 125 | |
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| 126 | //-------------------------------------------------------------------------- |
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| 127 | //SETTERS |
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[23] | 128 | public void addDomainPackage(String domainPackage) { |
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| 129 | domainPackages.add(domainPackage); |
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| 130 | } |
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| 131 | } |
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