package com.fasterxml.jackson.module.paranamer;
import java.lang.reflect.*;
import com.thoughtworks.paranamer.BytecodeReadingParanamer;
import com.thoughtworks.paranamer.CachingParanamer;
import com.thoughtworks.paranamer.Paranamer;
import com.fasterxml.jackson.databind.AnnotationIntrospector;
import com.fasterxml.jackson.databind.PropertyName;
import com.fasterxml.jackson.databind.introspect.*;
/**
* Stand-alone {@link AnnotationIntrospector} that defines functionality
* to discover names of constructor (and factory method) parameters,
* on top of default Jackson annotation processing.
* It can be used as the replacement for vanilla
* {@link JacksonAnnotationIntrospector}.
*/
public class ParanamerOnJacksonAnnotationIntrospector
extends JacksonAnnotationIntrospector
{
private static final long serialVersionUID = 1;
protected final Paranamer _paranamer;
public ParanamerOnJacksonAnnotationIntrospector() {
this(new CachingParanamer(new BytecodeReadingParanamer()));
}
public ParanamerOnJacksonAnnotationIntrospector(Paranamer pn) {
_paranamer = pn;
}
@Override
public PropertyName findNameForDeserialization(Annotated a)
{
/* 14-Apr-2014, tatu: Important -- we should NOT introspect name here,
* since we are not using annotations; instead it needs to be done
* in {@link #findParameterSourceName(AnnotatedParameter)}.
*/
/*
PropertyName name = super.findNameForDeserialization(a);
if (name == null) {
if (a instanceof AnnotatedParameter) {
String rawName = _findParaName((AnnotatedParameter) a);
if (rawName != null) {
return new PropertyName(rawName);
}
}
}
*/
return null;
}
// since 2.4
@Override
public String findImplicitPropertyName(AnnotatedMember param) {
if (param instanceof AnnotatedParameter) {
return _findParaName((AnnotatedParameter) param);
}
return null;
}
/*
/**********************************************************
/* Internal methods
/**********************************************************
*/
protected String _findParaName(AnnotatedParameter param)
{
int index = param.getIndex();
AnnotatedElement ctor = param.getOwner().getAnnotated();
String[] names = _paranamer.lookupParameterNames((AccessibleObject) ctor);
if (names != null && index < names.length) {
return names[index];
}
return null;
}
}