ClassTransformation.addInitialization()
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Key: TAP5-852
URL: https://issues.apache.org/jira/browse/TAP5-852
Project: Tapestry 5
Issue Type: New Feature
Components: tapestry-core
Reporter: Howard M. Lewis Ship
It is very common to want to add some initialization to a component.
Currently, it is necessary to inject dependencies and directly add code.
It would be nice if there were new interfaces:
interface ComponentInitializer {
void initializeComponent(ComponentResources resources);
}
interface ComponentFieldInitializer {
Object initializeComponentField(ComponentResources resources);
}
These could be paired up with methods in ClassTransformation:
void addFieldInitialization(String fieldName, ComponentFieldInitializer
initializer);
void addInitialization(ComponentInitializer initializer);
These methods would translate to code executed in the constructor of the
component.
This would simplify many of the existing component class transform workers.
It also represents a way to start moving away from writing explicit code
generation (using Javassist psuedo-code) towards a more API driven approach
that could eventually be implemented using
ASM or some other better supported toolkit.
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