@BindAdapter

Every supported java type in Kripton has a specific representation in its persisted state. This annotation allows to persist a field of a specific type in can be applied to a public field or a field with getter and setter. It is not used in SharedPreference and SQLite generation.

For example:

Bean

@BindType
public class Bean {

  @BindXml(xmlType = XmlType.ATTRIBUTE)
  public String description;

  @BindXml(xmlType = XmlType.ATTRIBUTE)
  public int id;
  
  public Date date;
}

Its rapresentation in JSON:

{"date":"2017-01-23T00:35:24.728Z","description":"hello","id":0}

Its rapresentation in XML (indented for readibility reasons):

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<bean description="hello" id="0">
  <date>2017-01-23T00:35:24.728Z</date>
</bean>

As you notice, field date is persisted like a string 2017-01-23T00:35:24.728Z. To persist date as a long, just change annotations and write an adapter class named DateAdapter:

new version Bean

@BindType
public class Bean {

  @BindXml(xmlType = XmlType.ATTRIBUTE)
  public String description;

  @BindXml(xmlType = XmlType.ATTRIBUTE)
  public int id;
  
  @BindAdapter(adapter = DateAdapter.class, dataType = Long.class)
  public Date date;
}

DateAdapter

public class DateAdapter implements BindTypeAdapter<Date, Long> {

  @Override
  public Date toJava(Long dataValue) throws Exception {
    return new Date(dataValue);
  }

  @Override
  public Long toData(Date javaValue) throws Exception {
    return javaValue.getTime();
  }
}

Bean's rapresentation in JSON:

{"date":1485132009409,"description":"hello","id":0}

Its rapresentation in XML (indented for readibility reasons):

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<bean description="hello" id="0">
  <date>1485132009409</date>
</bean>

Attributes

• adapter: TypeAdapter used to convert data