{"id":558,"date":"2004-01-21T15:15:32","date_gmt":"2004-01-21T19:15:32","guid":{"rendered":"http:\/\/wordpress.cephas.net\/?p=558"},"modified":"2004-01-21T15:15:32","modified_gmt":"2004-01-21T19:15:32","slug":"hibernate-code-generation","status":"publish","type":"post","link":"https:\/\/cephas.net\/blog\/2004\/01\/21\/hibernate-code-generation\/","title":{"rendered":"Hibernate Code Generation"},"content":{"rendered":"

Justin left a comment<\/a> about various tools for generating Java code from XML. Last week while I was reading about Hibernate I was interested to read that the same files you use to persist POJO’s to a database using Hibernate can be used to create the Java objects as well. It’s reasonably well documented on the hibernate site<\/a>, but doesn’t include all the classes you need on the classpath, so here’s an example from my system:
\n
\njava -cp C:\\hibernate\\hibernate-2.1\\hibernate2.jar;
\nC:\\hibernate\\hibernate-extensions-2.1\\tools\\hibernate-tools.jar;
\nC:\\hibernate\\hibernate-2.1\\lib\\commons-collections.jar;
\nC:\\hibernate\\hibernate-2.1\\lib\\commons-logging.jar;
\nC:\\hibernate\\hibernate-extensions-2.1\\tools\\lib\\jdom.jar net.sf.hibernate.tool.hbm2java.CodeGenerator Resource.hbm.xml
\n<\/code>
\nwhere Resource.hbm.xml looks likes this:
\n
\n<?xml version=\"1.0\"?>
\n<!DOCTYPE hibernate-mapping
\n PUBLIC \"-\/\/Hibernate\/Hibernate Mapping DTD\/\/EN\"
\n \"http:\/\/hibernate.sourceforge.net\/hibernate-mapping-2.0.dtd\">
\n<hibernate-mapping package=\"com.mycompany\" auto-import=\"false\">
\n <class name=\"Resource\" table=\"resource\">
\n  <id name=\"id\" type=\"int\" unsaved-value=\"0\" >
\n    <column name=\"id\" sql-type=\"int\" not-null=\"true\"\/>
\n    <generator class=\"identity\" \/>
\n   <\/id>
\n   <property name=\"label\" type=\"string\" \/>
\n   <property name=\"filename\" type=\"string\" \/>
\n   <property name=\"teaser\" type=\"string\" \/>
\n   <property name=\"type\" type=\"string\" \/>
\n   <property name=\"url\" type=\"string\" \/>
\n   <property name=\"datetimecreated\" type=\"date\" \/>
\n   <property name=\"datetimemodified\" type=\"date\" \/>
\n   <property name=\"createdby\" type=\"string\" \/>
\n   <property name=\"modifiedby\" type=\"string\" \/>
\n   <property name=\"active\" type=\"integer\" \/>
\n   <property name=\"archive\" type=\"integer\" \/>
\n <\/class>
\n<\/hibernate-mapping>
\n<\/code>
\nThis will automatically create a JavaBean, with full and empty constructors, getters and setters for all the fields, a toString() method, an equals() method, and a hashCode() method. Additionally, you can use an external configuration file to add an interface that the bean implements, change the rendering mechanism, the package, etc.<\/p>\n

Cooler still, you can go backwards and create Hibernate mapping files directly from your existing compiled classes using the net.sf.hibernate.tool.class2hbm.MapGenerator<\/code>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Justin left a comment about various tools for generating Java code from XML. Last week while I was reading about Hibernate I was interested to read that the same files you use to persist POJO’s to a database using Hibernate can be used to create the Java objects as well. It’s reasonably well documented on … Continue reading Hibernate Code Generation<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,2],"tags":[],"_links":{"self":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/posts\/558"}],"collection":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/comments?post=558"}],"version-history":[{"count":0,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/posts\/558\/revisions"}],"wp:attachment":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/media?parent=558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/categories?post=558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/tags?post=558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}