Sample for for an XSP Object data source that is writable

Question

I'm struggling with the Object datasource in an XPage:

  <xp:this.data>
    <xe:objectData var="demo" ignoreRequestParams="true"
        readonly="false" scope="view"
        createObject="#{javascript:return new demo.SampleBean();}">
    </xe:objectData>
  </xp:this.data>

When I execute save(); on the XPage in SSJS I get the error:

Error saving data source demo
The save method has not been implemented in the data source

The class is rather simple:

package demo;
import java.io.Serializable;

public class SampleBean implements Serializable {

private static final long serialVersionUID  = 1L;
private String name;
private String job;

public String getName() {
    return this.name;
}

public String getJob() {
    return this.job;
}

public void setName(final String name) {
    this.name = name;
}

public void setJob(final String job) {
    this.job = job;
}

public void dummyAction() {
        System.out.println("Here shall be logic");
}   

}

I tried to add a public void save(); method to the class, but that doesn't do the trick. So I'm looking for a sample of an Object datasource

Answer 1

You've defined the createObject attribute for the data source, but you haven't specified the saveObject attribute... that's what the error message you're getting ("save method has not been implemented") is referring to.

So, for example, if you want your dummyAction() method to run when a save is triggered, try this:

<xp:this.data>
  <xe:objectData var="demo" ignoreRequestParams="true"
      readonly="false" scope="view"
      createObject="#{javascript:return new demo.SampleBean();}"
      saveObject="#{javascript:return value.dummyAction();}">
  </xe:objectData>
</xp:this.data>

When the saveObject attribute is specified as a SSJS method binding, the variable value is bound to the data object, and then the method binding is invoked. So you can either pass value to some other object to handle the business logic of saving the object, or you can use a syntax of value.anyMethod() to keep the business logic of object serialization internal to the object itself.

NOTE: whatever logic you do use in this method, you'll want to return a boolean (not void), so that a return value of false can be treated as a cancellation, just like the standard Domino document data source does.