Data source

For drop-down lists, drop-down check boxes, radio buttons, check boxes, etc., they require a selection list. The data source used to provide a list of choices is called a data source. There are generally several methods for setting up a data source.

1.value child node

Such as:

<?xml version='1.0' encoding='utf-8'?>

<attribute name="sex" descriptors="xworker.lang.MetaDescriptor3/@attribute" inputtype="select">
     <value name="male" value="male"/>
     <value name="female" value="female"/>
</attribute>

2. Override the List<Thing> getValues() method

For example:

<?xml version='1.0' encoding='utf-8'?>

<attribute name="job" descriptors="xworker.lang.MetaDescriptor3/@attribute" inputtype="select">
     <actions>
         <GroovyAction name="getValues" descriptors="xworker.groovy.GroovyAction">
             <code><![CDATA[import org.xmeta.Thing;

def values = [];

def male = new Thing();
male.put("name", "Male");
male.put("value", "male");
values.add(male);

def female = new Thing();
female.put("name", "Female");
female.put("value", "female");
values.add(female);

return values;]]></code>
         </GroovyAction>
     </actions>
</attribute>

3. Data object

The data object is a two-dimensional tabular data framework and a bridge between storage and interface. CURD operations on data can be implemented through data objects, which can also be easily mapped to the interface.

3.1. Set the data object as the data source

Such as:

<?xml version='1.0' encoding='utf-8'?>

<attribute name="fontName" descriptors="xworker.lang.MetaDescriptor3/@attribute" inputtype="select"
      relationDataObject="xworker.things.p2018.p02.p22.FontNames" relationValueField="name"
      relationLabelField="name"/>

3.2. Set the data warehouse as the data source

Such as:

<?xml version='1.0' encoding='utf-8'?>

<attribute name="fontName" descriptors="xworker.lang.MetaDescriptor3/@attribute" inputtype="select"
      dataStore="xworker.things.p2018.p02.p22.FontNameStore"/>