package com.fasterxml.jackson.databind.type;
import java.util.*;
import com.fasterxml.jackson.databind.BaseMapTest;
import com.fasterxml.jackson.databind.JavaType;
/**
* Simple tests to verify for generic type binding functionality
* implemented by {@link TypeBindings} class.
*/
public class TestTypeBindings
extends BaseMapTest
{
static class AbstractType<A,B> { }
static class LongStringType extends AbstractType<Long,String> { }
static class InnerGenericTyping<K, V> extends AbstractMap<K, Collection<V>>
{
@Override
public Set<java.util.Map.Entry<K, Collection<V>>> entrySet() {
return null;
}
public class InnerClass extends AbstractMap<K, Collection<V>> {
@Override
public Set<java.util.Map.Entry<K, Collection<V>>> entrySet() {
return null;
}
}
}
/*
/**********************************************************
/* Test methods
/**********************************************************
*/
public void testAbstract() throws Exception
{
/* Abstract type does declare type parameters, but they are only
* known as 'Object.class' (via lower bound)
*/
TypeFactory tf = TypeFactory.defaultInstance();
TypeBindings b = new TypeBindings(tf, AbstractType.class);
assertEquals(2, b.getBindingCount());
JavaType obType = tf.constructType(Object.class);
assertEquals(obType, b.findType("A"));
assertEquals(obType, b.findType("B"));
}
public void testSimple() throws Exception
{
TypeFactory tf = TypeFactory.defaultInstance();
// concrete class does have bindings however
TypeBindings b = new TypeBindings(tf, LongStringType.class);
assertEquals(2, b.getBindingCount());
assertEquals(tf.constructType(Long.class), b.findType("A"));
assertEquals(tf.constructType(String.class), b.findType("B"));
}
// [JACKSON-677]
public void testInnerType() throws Exception
{
TypeFactory tf = TypeFactory.defaultInstance();
JavaType type = tf.constructType(InnerGenericTyping.InnerClass.class);
assertEquals(MapType.class, type.getClass());
JavaType keyType = type.getKeyType();
assertEquals(Object.class, keyType.getRawClass());
JavaType valueType = type.getContentType();
assertEquals(Collection.class, valueType.getRawClass());
JavaType vt2 = valueType.getContentType();
assertEquals(Object.class, vt2.getRawClass());
}
}