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Lightweight Object SQL Relational Mapping (OSRM)
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package com.objectsql.generator;
import com.objectsql.BaseServiceImpl;
import com.objectsql.BaseService;
import com.objectsql.SQLService;
import com.objectsql.ObjectSQLManager;
import com.objectsql.annotation.RdColumn;
import com.objectsql.annotation.RdId;
import com.objectsql.annotation.RdTable;
import com.objectsql.exception.ORMException;
import com.objectsql.query.QueryUtils;
import com.objectsql.support.ColumnType;
import com.objectsql.support.Table;
import com.objectsql.support.TableColumn;
import com.objectsql.utils.ORMUtils;
import java.io.Serializable;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.util.*;
public class CodeGenerator {
private static final String FOUR_SPACE = " ";
public static String generateEntity(String tableName,
SQLService sqlService,
boolean ignorePrefix,
Class baseEntity,
Map replaceClasses) {
Table table = sqlService.table(tableName);
if (table == null){
throw new ORMException("Table not found : " + tableName);
}
List columns = sqlService.tableColumns(tableName);
if (columns == null || columns.isEmpty()){
throw new ORMException("Table columns not found : " + tableName);
}
List contents = new ArrayList();
//add import
contents.add(String.format("import %s;", RdColumn.class.getName()));
contents.add(String.format("import %s;", RdId.class.getName()));
contents.add(String.format("import %s;", RdTable.class.getName()));
contents.add(String.format("import %s;", ColumnType.class.getName()));
//判断是否继承 BaseEntity
List baseEntityInfo = getBaseEntityInfo(baseEntity);
boolean useExtendEntity = contains(columns, replaceClasses, baseEntityInfo);
if(useExtendEntity && !baseEntityInfo.isEmpty()){
if(baseEntity != null){
contents.add(String.format("import %s;", baseEntity.getName()));
}
}else{
contents.add(String.format("import %s;", Serializable.class.getName()));
}
int insertIndex = contents.size();
List addedClasses = new ArrayList();
if(replaceClasses != null) {
Collection importClasses = replaceClasses.values();
for (String importClass : importClasses) {
if (!importClass.startsWith("java.lang.") && !addedClasses.contains(importClass)
&& !importClass.startsWith("[")) {
contents.add(String.format("import %s;", importClass));
addedClasses.add(importClass);
}
}
}
String beanName = beanName(table.getName(), ignorePrefix);
contents.add("/**");
contents.add("IService:");
contents.add("");
contents.addAll(generateInterface(beanName));
contents.add("");
contents.add("ServiceImplement:");
contents.add("");
contents.addAll(generateImplement(beanName));
contents.add("*/");
//add new line
contents.add("");
contents.add(String.format("@RdTable(name = \"%s\", comment = \"%s\")",
table.getName().toUpperCase(Locale.ROOT),
table.getComment() != null?table.getComment().trim():""));
if(useExtendEntity){
//public class Product extends BaseEntity {
contents.add(String.format("public class %s extends BaseEntity {", beanName));
}else{
contents.add(String.format("public class %s implements Serializable {", beanName));
}
//add new line
contents.add("");
//serial version
contents.add(FOUR_SPACE + "private static final long serialVersionUID = 1L;");
//add new line
contents.add("");
List constantFields = new ArrayList();
List fields = new ArrayList();
List getSeters = new ArrayList();
boolean containsDate = false;
boolean containColumnType = false;
for(int i = 0; i < columns.size(); i++){
TableColumn column = columns.get(i);
String columnName = column.getColumn().toUpperCase(Locale.ROOT);
String fieldName = QueryUtils.displayName(column.getColumn());
String className = column.getColumnClass();
if(replaceClasses != null && replaceClasses.containsKey(className)) {
className = replaceClasses.get(className);
}
if("[B".equals(className)){
className = "byte []";
}else if(!className.startsWith("java.lang.")){
String ip = "import " + className + ";";
if(!contents.contains(ip)) {
contents.add(insertIndex, ip);
}
}
boolean isTimestamp = (Long.class.getName().equals(className) || BigDecimal.class.getName().equals(className)) && column.getPrecision() == 15 && column.getScale() == 0;
if(isTimestamp){
className = Date.class.getName();
if(!baseEntityInfo.contains(fieldName + "," + className)){
containsDate = true;
}
}
if(!useExtendEntity || !baseEntityInfo.contains(fieldName + "," + className)){
if(!ORMUtils.isEmpty(column.getComment())) {
constantFields.add(FOUR_SPACE + "/** " + column.getComment() + " */");
}
constantFields.add(FOUR_SPACE + String.format("public static final String T_%s = \"%s\";", columnName, columnName));
List rdColumnInfo = new ArrayList();
boolean skipDefaultValue = false;
rdColumnInfo.add(String.format("name = T_%s", columnName));
if(!ORMUtils.isEmpty(column.getComment())){
String [] cs = column.getComment().split(";");
if(cs.length > 0){
rdColumnInfo.add(String.format("title = \"%s\"", cs[0]));
}
if(cs.length > 1){
rdColumnInfo.add(String.format("description = \"%s\"", cs[1]));
}
}
if(String.class.getName().equals(className) || Character.class.getName().equals(className)){
if("text".equalsIgnoreCase(column.getType()) && column.getLength() == 65535){
rdColumnInfo.add("type = ColumnType.TEXT");
containColumnType = true;
}else if(column.getLength() != 191){
rdColumnInfo.add(String.format("length = %d", column.getLength()));
}else{
//do nothing.
}
}else if((Integer.class.getName().equals(className) || Long.class.getName().equals(className))) {
if(column.getPrecision() > 0){
rdColumnInfo.add(String.format("precision = %d", column.getPrecision()));
}
}else if(Double.class.getName().equals(className) || Float.class.getName().equals(className) || BigDecimal.class.getName().equals(className)){
if(column.getPrecision() > 0){
rdColumnInfo.add(String.format("precision = %d", column.getPrecision()));
}
if(column.getScale() > 0){
rdColumnInfo.add(String.format("scale = %d", column.getScale()));
}
}else if(Date.class.getName().equals(className)){
if(isTimestamp) {
rdColumnInfo.add("type = ColumnType.LONG");
containColumnType = true;
}else if("datetime".equalsIgnoreCase(column.getType())){
rdColumnInfo.add("type = ColumnType.DATETIME");
containColumnType = true;
}else if("timestamp".equalsIgnoreCase(column.getType())){
rdColumnInfo.add("type = ColumnType.TIMESTAMP");
containColumnType = true;
skipDefaultValue = true;
}
}else if("[B".equals(className) || "byte []".equals(className)){
if("blob".equals(column.getType())){
rdColumnInfo.add("type = ColumnType.BLOB");
containColumnType = true;
}else if("varbinary".equals(column.getType())){
rdColumnInfo.add("type = ColumnType.BINARY");
containColumnType = true;
}
}
if(!ORMUtils.isEmpty(column.getDefaultValue()) && !skipDefaultValue){
rdColumnInfo.add(String.format("defaultValue = \"%s\"", column.getDefaultValue()));
}
rdColumnInfo.add(String.format("order = %d", (i+1) * 10));
int lastIndex = className.lastIndexOf(".");
if(lastIndex > -1) {
className = className.substring(lastIndex + 1);
}
if(!column.isNullable()){
rdColumnInfo.add("nullable = false");
}
if(column.isPrimaryKey()) {
fields.add(FOUR_SPACE + String.format("@RdId"));
}
fields.add(FOUR_SPACE + String.format("@RdColumn(%s)", ORMUtils.join(rdColumnInfo, ", ")));
fields.add(FOUR_SPACE + String.format("private %s %s;", className, fieldName));
fields.add("");
getSeters.addAll(createGetAndSet(FOUR_SPACE, className, fieldName));
}
}
if(containsDate){
contents.add(insertIndex, "import java.util.Date;");
}
if (!containColumnType){
contents.remove("import com.objectsql.support.ColumnType;");
}
contents.addAll(constantFields);
//add new line
contents.add("");
contents.addAll(fields);
contents.addAll(getSeters);
contents.add("}");
return ORMUtils.join(contents, "\n");
}
public static List generateImplement(String beanName) {
List contents = new ArrayList();
contents.add(String.format("import %s;", BaseServiceImpl.class.getName()));
contents.add(String.format("import %s;", ObjectSQLManager.class.getName()));
//add new line
contents.add("");
contents.add(String.format("public class %sServiceImpl extends BaseServiceImpl<%s> implements I%sService {",
beanName, beanName, beanName));
contents.add(FOUR_SPACE + String.format("public %sServiceImpl(ObjectSQLManager objectSQLManager){", beanName));
contents.add(FOUR_SPACE + FOUR_SPACE + "super(objectSQLManager);");
contents.add(FOUR_SPACE + "}");
contents.add("}");
return contents;
}
public static List generateInterface(String beanName) {
List contents = new ArrayList();
contents.add(String.format("import %s;", BaseService.class.getName()));
//add new line
contents.add("");
contents.add(String.format("public interface I%sService extends BaseService<%s> {", beanName, beanName));
contents.add("");
contents.add("}");
return contents;
}
private static List getBaseEntityInfo(Class clazz){
List info = new ArrayList();
if(clazz != null) {
Field[] fields = clazz.getDeclaredFields();
for (Field field : fields) {
if (field.getDeclaredAnnotation(RdColumn.class) != null) {
info.add(field.getName() + "," + field.getType().getName());
}
}
}
return info;
}
public static String beanName(String tableName, boolean ignorePrefix){
tableName = tableName.toUpperCase(Locale.ROOT);
String [] bns = tableName.split("_");
if (bns.length == 1){
return tableName.substring(0, 1) + tableName.substring(1).toLowerCase(Locale.ROOT);
}
StringBuffer contents = new StringBuffer();
for(int i = 0; i < bns.length; i++){
String bn = bns[i];
if(!(i == 0 && ignorePrefix)){
if (bn.length() == 1){
throw new RuntimeException("Column name length should more than 1.");
}
contents.append(bn.substring(0, 1) + bn.substring(1).toLowerCase(Locale.ROOT));
}
}
return contents.toString();
}
public static List createGetAndSet(String FOUR_SPACE, String className, String fieldName){
List temp = new ArrayList();
if(fieldName == null || fieldName.length() <= 1) {
throw new RuntimeException("Field name length should more than 1.");
}
String suffix = fieldName.substring(0,1).toUpperCase(Locale.ROOT) + fieldName.substring(1);
//add new line
temp.add("");
temp.add(FOUR_SPACE + String.format("public %s get%s(){", className, suffix));
temp.add(FOUR_SPACE + FOUR_SPACE + String.format("return this.%s;", fieldName));
temp.add(FOUR_SPACE + "}");
temp.add(FOUR_SPACE + String.format("public void set%s(%s %s){", suffix, className, fieldName));
temp.add(FOUR_SPACE + FOUR_SPACE + String.format("this.%s = %s;", fieldName, fieldName));
temp.add(FOUR_SPACE + "}");
return temp;
}
private static boolean contains(List columns, Map replace, List values){
if (replace == null){
return false;
}
List columnClass = new ArrayList();
for(TableColumn column : columns){
String clazz = column.getColumnClass();
if(BigDecimal.class.getName().equals(clazz) || Long.class.getName().equals(clazz)){
if(column.getPrecision() == 15 && column.getScale() == 0){
clazz = Date.class.getName();
}
}
if(replace.containsKey(clazz)) {
columnClass.add(QueryUtils.displayName(column.getColumn()) + "," + replace.get(clazz));
}else{
columnClass.add(QueryUtils.displayName(column.getColumn()) + "," + clazz);
}
}
return columnClass.containsAll(values);
}
}