HIbernate-tools修改记录

本文详细介绍了如何改进Hibernate工具,包括增加中文注释,修改ID生成规则,增加集合注解的targetEntity属性,并提供了一段用于自动生成带注解的JavaDomain文件的代码示例。该过程涉及数据库映射和对象关系映射(ORM)技术的应用。

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HIbernate-tools修改记录
1,增加中文注释,参考BLOG:[url]http://www.blogjava.net/pauliz/archive/2009/11/13/302162.html[/url]
2,修改默认ID生成规则
public String getTableIdentifierStrategyName(TableIdentifier identifier) {
//return "assigned";
return "uuid";//默认UUID
}


3,增加ONE-TO-MANY的集合注解的targetEntity属性,也可以增加其他属性
public String generateCollectionAnnotation(Property property, Configuration cfg) {
StringBuffer annotation = new StringBuffer();
Value value = property.getValue();
if ( value != null && value instanceof Collection) {
Collection collection = (Collection) value;
if ( collection.isOneToMany() ) {
String mappedBy = null;
OneToMany oneToMany = (OneToMany) collection.getElement();
annotation.append(" @").append( importType( "javax.persistence.OneToMany") )
.append( "(cascade={").append(getCascadeType( property ) ).append("}")
//melon add FIXME 增加targetEntity属性
//.append(",targetEntity=").append(getTargetClassName(property)).append(".class")
.append(",targetEntity=").append(oneToMany.getReferencedEntityName()).append(".class")
.append(", fetch=").append( getFetchType( property ) );
if ( collection.isInverse() ) {
annotation.append(", mappedBy=\"");
mappedBy = getOneToManyMappedBy( cfg, collection );
annotation.append( mappedBy ).append("\"");
}
annotation.append(")");
if (mappedBy == null) annotation.append("\n").append( generateJoinColumnsAnnotation(property) );
}
else {
//TODO do the @OneToMany @JoinTable
//TODO composite element
String mappedBy = null;
annotation.append(" @").append( importType( "javax.persistence.ManyToMany") )
.append( "(cascade={").append(getCascadeType( property ) ).append("}")
.append(", fetch=").append( getFetchType( property ) );
if ( collection.isInverse() ) {
annotation.append(", mappedBy=\"");
mappedBy = getManyToManyMappedBy( cfg, collection );
annotation.append( mappedBy ).append("\"");
}
annotation.append(")");
if (mappedBy == null) {
annotation.append("\n @");
annotation.append( importType( "javax.persistence.JoinTable") ).append( "(name=\"" );
Table table = collection.getCollectionTable();

annotation.append( table.getName() );
annotation.append( "\"" );
if ( StringHelper.isNotEmpty( table.getSchema() ) ) {
annotation.append(", schema=\"").append( table.getSchema() ).append("\"");
}
if ( StringHelper.isNotEmpty( table.getCatalog() ) ) {
annotation.append(", catalog=\"").append( table.getCatalog() ).append("\"");
}
String uniqueConstraint = generateAnnTableUniqueConstraint(table);
if ( uniqueConstraint.length() > 0 ) {
annotation.append(", uniqueConstraints={").append(uniqueConstraint).append("}");
}
annotation.append( ", joinColumns = { ");
buildArrayOfJoinColumnAnnotation(
collection.getKey().getColumnIterator(),
annotation,
property.isInsertable(),
property.isUpdateable()
);
annotation.append( " }");
annotation.append( ", inverseJoinColumns = { ");
buildArrayOfJoinColumnAnnotation(
collection.getElement().getColumnIterator(),
annotation,
property.isInsertable(),
property.isUpdateable()
);
annotation.append( " }");
annotation.append(")");
}

}
String hibernateCascade = getHibernateCascadeTypeAnnotation( property );
if (hibernateCascade.length() > 0) annotation.append("\n ").append(hibernateCascade);
}
return annotation.toString();
}


4,通过hibernate.cfg.xml配置自动生成带注解的JAVA domain文件

import java.io.File;
import java.util.Properties;

import junit.framework.TestCase;

import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.JDBCMetaDataConfiguration;
import org.hibernate.cfg.reveng.DefaultReverseEngineeringStrategy;
import org.hibernate.cfg.reveng.ReverseEngineeringSettings;
import org.hibernate.tool.hbm2x.POJOExporter;

public class GeneratePojoTest extends TestCase {

public void testGenerateJava() {

Configuration xmlcfg = new Configuration().configure("/hibernate.cfg.xml");

JDBCMetaDataConfiguration cfg = new JDBCMetaDataConfiguration();
Properties properties = xmlcfg.getProperties();
cfg.setProperties(properties);

DefaultReverseEngineeringStrategy configurableNamingStrategy = new DefaultReverseEngineeringStrategy();
configurableNamingStrategy.setSettings(new ReverseEngineeringSettings()
.setDefaultPackageName("net.esj.test.generic")//要生成的包名
.setCreateCollectionForForeignKey(true)//是否生成many-to-one的在one端的集合类
.setCreateManyToOneForForeignKey(true)//是否生成many-to-one
.setDetectManyToMany(true)//是否生成many-to-many
.setDetectOptimisticLock(true) //乐观锁对象?
);
cfg.setReverseEngineeringStrategy(configurableNamingStrategy);
cfg.readFromJDBC();
cfg.buildMappings();

POJOExporter exporter = new POJOExporter(cfg,getOutputDir());
exporter.getProperties().setProperty("ejb3", "true");//ejb3注解
exporter.getProperties().setProperty("jdk5", "true");//jdk5语法(主要是集合类的泛型处理)
exporter.start();

// exporter = new POJOExporter(xmlcfg,getOutputDir());
// exporter.start();

//TestHelper.deleteDir(getOutputDir());
}

private File getOutputDir(){

File file = new File("E:\\program\\javaws\\melon_2.0\\src\\core\\main\\test");//生成项目的物理位置(跟目录,tools会自动根据pacakge建立相应路径)
return file;
}

}


直接用junit或mian函数运行,而非依赖于jboss的插件,省的更新eclipse或者迁移的时候各种麻烦
副项目包备份
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