package com.fasterxml.jackson.databind.module;
import java.util.Map;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.BaseMapTest;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.KeyDeserializer;
import com.fasterxml.jackson.databind.ObjectMapper;
public class TestKeyDeserializers extends BaseMapTest
{
static class FooKeyDeserializer extends KeyDeserializer
{
@Override
public Foo deserializeKey(String key, DeserializationContext ctxt)
{
return new Foo(key);
}
}
static class Foo {
public String value;
public Foo(String v) { value = v; }
}
/*
/**********************************************************
/* Unit tests
/**********************************************************
*/
public void testKeyDeserializers() throws Exception
{
ObjectMapper mapper = new ObjectMapper();
SimpleModule mod = new SimpleModule("test", Version.unknownVersion());
mod.addKeyDeserializer(Foo.class, new FooKeyDeserializer());
mapper.registerModule(mod);
Map<Foo,Integer> map = mapper.readValue("{\"a\":3}",
new TypeReference<Map<Foo,Integer>>() {} );
assertNotNull(map);
assertEquals(1, map.size());
Foo foo = map.keySet().iterator().next();
assertEquals("a", foo.value);
}
}