@Validate method is called when the @Requires components are not validated yet
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Key: FELIX-2834
URL: https://issues.apache.org/jira/browse/FELIX-2834
Project: Felix
Issue Type: Bug
Components: iPOJO
Affects Versions: iPOJO-1.6.0
Reporter: Vincent Vandemeulebrouck
Declare two components one that requires the other.
Have an @Validate method.
Depending on the declaration order in the metadata.xml, the component that
requires the other may have acces to a component which has not been validated.
Example:
@Component
class Component1
{
@Requires
Component2 c2;
@Validate
public void init() {
// this may cause an NullPointerException, as c2.usefullData is created in
the @Validate method
if (c2.usefullData.length()>0) {
// Do something
}
}
}
@Component
class Component2
{
String usefullData;
@Validate
public void init() { usefullData="ready"; }
}
If you declare this metadata.xml, the @Validate will fail:
<ipojo>
<instance component="Component1" />
<instance component="Component2" />
</ipojo>
Changing the order of components in xml solves the problem, although I think
the validation should be called only when the required components are validated.
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