Public:BWmeta service/Java mapping

From YaddaWiki

Service details
Name	BWmeta
Code location (relative to SVN root)	projects/dir/bwmeta-core
Javadoc
Contact person	Jakub Jurkiewicz
edit BWmeta format Data Model BWMeta Model Design principles 1.0.5 example 1.2.0 example 2.0.0 example Feature requests Linked Open Data Hierarchys Book Journal BWmeta usage in YADDA Java mapping Rich text in Java mapping Transformers data sources Conventions and constants Contents and attachments Internationalization Tutorial How to convert to Dublic Core? Categorizations

General contracts

• Every class has a public empty constructor.
• Every setter and every list adder in every class returns this, which allows chained setting, e.g.:

new YElement()
    .setId("bwmeta1.element.foo")
    .addName(new YName().setText("Foo").setLanguage(YLanguage.English))
    .addDescription(new YDescription().setText("Lorem ipsum").setLanguage(YLanguage.Latin));

• Every property is protected, but has a public getter and setter.
• Getters of String, YLanguage and List properties can never return null. Instead, they return an empty String, YLanguage.Undetermined or an empty List, respectively.