Examples of com.fasterxml.jackson.databind.type.TypeFactory

Package com.fasterxml.jackson.databind.type

Examples of com.fasterxml.jackson.databind.type.TypeFactory

com.fasterxml.jackson.databind.type.TypeFactory
Class used for creating concrete {@link JavaType} instances,given various inputs.
Instances of this class are accessible using {@link com.fasterxml.jackson.databind.ObjectMapper}as well as many objects it constructs (like {@link com.fasterxml.jackson.databind.DeserializationConfig} and{@link com.fasterxml.jackson.databind.SerializationConfig})), but usually those objects also expose convenience methods (constructType). So, you can do for example:
```
 JavaType stringType = mapper.constructType(String.class); 
```
However, more advanced methods are only exposed by factory so that you may need to use:
```
 JavaType stringCollection = mapper.getTypeFactory().constructCollectionType(List.class, String.class); 
```


    public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property)
        throws JsonMappingException
    {
        // First: figure out what is the fully generic delegate type:
        TypeFactory tf = ctxt.getTypeFactory();
        JavaType implType = tf.constructType(_converter.getClass());
        JavaType[] params = tf.findTypeParameters(implType, Converter.class);
        if (params == null || params.length != 2) {
            throw new JsonMappingException("Could not determine Converter parameterization for "
                    +implType);
        }
        // and then we can find serializer to delegate to, construct a new instance:

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        return findAdapterBoundType(adapter).isAssignableFrom(targetType);
    }


    private Class<?> findAdapterBoundType(XmlAdapter<?,?> adapter)
    {
        TypeFactory tf = getTypeFactory();
        JavaType adapterType = tf.constructType(adapter.getClass());
        JavaType[] params = tf.findTypeParameters(adapterType, XmlAdapter.class);
        // should not happen, except if our type resolution has a flaw, but:
        if (params == null || params.length < 2) {
            return Object.class;
        }
        return params[1].getRawClass();

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                mapper._deserializationContext = mapper._deserializationContext.with(df);
            }


//          @Override
            public void addTypeModifier(TypeModifier modifier) {
                TypeFactory f = mapper._typeFactory;
                f = f.withModifier(modifier);
                mapper.setTypeFactory(f);
            }


//          @Override
            public void addValueInstantiators(ValueInstantiators instantiators) {

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    if (conversionService.canConvert(sourceClass, targetClass)) {
      try {
        return convertListElements(td, conversionService.convert(argument, targetClass));
      } catch (Exception e) {


        TypeFactory typeFactory = objectMapper.getTypeFactory();
        if (td.isCollection()) {
          JavaType type = CollectionType.construct(td.getType(),
              typeFactory.constructType(td.getElementTypeDescriptor().getType()));
          return objectMapper.convertValue(argument, type);
        } else if (td.isArray()) {
          JavaType type = typeFactory.constructArrayType(td.getElementTypeDescriptor().getType());
          return objectMapper.convertValue(argument, type);
        }


        throw e;
      }

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        }
        
        // [JACKSON-283]: AtomicReference is a rather special type...
        if (AtomicReference.class.isAssignableFrom(cls)) {
            // Must find parameterization
            TypeFactory tf = config.getTypeFactory();
            JavaType[] params = tf.findTypeParameters(type, AtomicReference.class);
            JavaType referencedType;
            if (params == null || params.length < 1) { // untyped (raw)
                referencedType = TypeFactory.unknownType();
            } else {
                referencedType = params[0];

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        Class<?> cls = type.getRawClass();
        // [JACKSON-283]: AtomicReference is a rather special type...
        if (AtomicReference.class.isAssignableFrom(cls)) {
            // Must find parameterization
            TypeFactory tf = ctxt.getTypeFactory();
            JavaType[] params = tf.findTypeParameters(type, AtomicReference.class);
            JavaType referencedType;
            if (params == null || params.length < 1) { // untyped (raw)
                referencedType = TypeFactory.unknownType();
            } else {
                referencedType = params[0];

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          return conversionService.convert(value, TypeDescriptor.forObject(value),
              methodParameter.getTypeDescriptor());
        } catch (ConversionFailedException e) {
          // ignore this exception for collections and arrays.
          // try to convert the value with jackson
          TypeFactory typeFactory = jsonHandler.getMapper().getTypeFactory();
          if (methodParameter.getTypeDescriptor().isCollection()) {
            JavaType type = CollectionType.construct(
                methodParameter.getType(),
                typeFactory.constructType(methodParameter.getTypeDescriptor()
                    .getElementTypeDescriptor().getType()));
            return jsonHandler.convertValue(value, type);
          } else if (methodParameter.getTypeDescriptor().isArray()) {
            JavaType type = typeFactory.constructArrayType(methodParameter.getTypeDescriptor()
                .getElementTypeDescriptor().getType());
            return jsonHandler.convertValue(value, type);
          }


          throw e;

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        return targetType.isAssignableFrom(findAdapterBoundType(adapter));
    }


    private Class<?> findAdapterBoundType(XmlAdapter<?,?> adapter)
    {
        TypeFactory tf = getTypeFactory();
        JavaType adapterType = tf.constructType(adapter.getClass());
        JavaType[] params = tf.findTypeParameters(adapterType, XmlAdapter.class);
        // should not happen, except if our type resolution has a flaw, but:
        if (params == null || params.length < 2) {
            return Object.class;
        }
        return params[1].getRawClass();

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    }


    public JsonSerializer<Object> createContextual(SerializerProvider prov,
            BeanProperty property) throws JsonMappingException
    {
        TypeFactory typeFactory = prov.getConfig().getTypeFactory();


        JavaType type = typeFactory.constructType(_xmlAdapter.getClass());
        JavaType[] rawTypes = typeFactory.findTypeParameters(type, XmlAdapter.class);
        JavaType valueType = (rawTypes == null || rawTypes.length < 2)
            ? TypeFactory.unknownType() : rawTypes[0];


        JsonSerializer<Object> ser = prov.findValueSerializer(valueType, property);
        return new XmlAdapterJsonSerializer(_xmlAdapter, valueType, ser);

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              methodParameter.getTypeDescriptor());
        }
        catch (ConversionFailedException e) {
          // ignore this exception for collections and arrays.
          // try to convert the value with jackson
          TypeFactory typeFactory = jsonHandler.getMapper().getTypeFactory();
          if (methodParameter.getTypeDescriptor().isCollection()) {
            JavaType type = CollectionType.construct(
                methodParameter.getType(),
                typeFactory.constructType(methodParameter
                    .getTypeDescriptor().getElementTypeDescriptor()
                    .getType()));
            return jsonHandler.convertValue(value, type);
          }
          else if (methodParameter.getTypeDescriptor().isArray()) {
            JavaType type = typeFactory
                .constructArrayType(methodParameter.getTypeDescriptor()
                    .getElementTypeDescriptor().getType());
            return jsonHandler.convertValue(value, type);
          }

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