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com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase Maven / Gradle / Ivy
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package com.fasterxml.jackson.databind.ser.std;
import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonArrayFormatVisitor;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.jsonschema.SchemaAware;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.ser.ContainerSerializer;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import com.fasterxml.jackson.databind.ser.impl.PropertySerializerMap;
import com.fasterxml.jackson.databind.type.TypeFactory;
/**
* Base class for serializers that will output contents as JSON
* arrays; typically serializers used for {@link java.util.Collection}
* and array types.
*/
public abstract class AsArraySerializerBase
extends ContainerSerializer
implements ContextualSerializer
{
protected final boolean _staticTyping;
protected final JavaType _elementType;
/**
* Type serializer used for values, if any.
*/
protected final TypeSerializer _valueTypeSerializer;
/**
* Value serializer to use, if it can be statically determined
*/
protected final JsonSerializer _elementSerializer;
/**
* Collection-valued property being serialized with this instance
*/
protected final BeanProperty _property;
/**
* If element type can not be statically determined, mapping from
* runtime type to serializer is handled using this object
*/
protected PropertySerializerMap _dynamicSerializers;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
protected AsArraySerializerBase(Class cls, JavaType et, boolean staticTyping,
TypeSerializer vts, BeanProperty property, JsonSerializer elementSerializer)
{
// typing with generics is messy... have to resort to this:
super(cls, false);
_elementType = et;
// static if explicitly requested, or if element type is final
_staticTyping = staticTyping || (et != null && et.isFinal());
_valueTypeSerializer = vts;
_property = property;
_elementSerializer = elementSerializer;
_dynamicSerializers = PropertySerializerMap.emptyMap();
}
@SuppressWarnings("unchecked")
protected AsArraySerializerBase(AsArraySerializerBase src,
BeanProperty property, TypeSerializer vts, JsonSerializer elementSerializer)
{
super(src);
_elementType = src._elementType;
_staticTyping = src._staticTyping;
_valueTypeSerializer = vts;
_property = property;
_elementSerializer = (JsonSerializer) elementSerializer;
_dynamicSerializers = src._dynamicSerializers;
}
public abstract AsArraySerializerBase withResolved(BeanProperty property,
TypeSerializer vts, JsonSerializer elementSerializer);
/*
/**********************************************************
/* Post-processing
/**********************************************************
*/
/**
* This method is needed to resolve contextual annotations like
* per-property overrides, as well as do recursive call
* to createContextual of content serializer, if
* known statically.
*/
@Override
public JsonSerializer createContextual(SerializerProvider provider,
BeanProperty property)
throws JsonMappingException
{
TypeSerializer typeSer = _valueTypeSerializer;
if (typeSer != null) {
typeSer = typeSer.forProperty(property);
}
/* 29-Sep-2012, tatu: Actually, we need to do much more contextual
* checking here since we finally know for sure the property,
* and it may have overrides
*/
JsonSerializer ser = null;
// First: if we have a property, may have property-annotation overrides
if (property != null) {
AnnotatedMember m = property.getMember();
if (m != null) {
Object serDef = provider.getAnnotationIntrospector().findContentSerializer(m);
if (serDef != null) {
ser = provider.serializerInstance(m, serDef);
}
}
}
if (ser == null) {
ser = _elementSerializer;
}
// 18-Feb-2013, tatu: May have a content converter:
ser = findConvertingContentSerializer(provider, property, ser);
if (ser == null) {
// 30-Sep-2012, tatu: One more thing -- if explicit content type is annotated,
// we can consider it a static case as well.
if (_elementType != null) {
// 20-Aug-2013, tatu: Need to avoid trying to access serializer for java.lang.Object tho
if ((_staticTyping && _elementType.getRawClass() != Object.class)
|| hasContentTypeAnnotation(provider, property)) {
ser = provider.findValueSerializer(_elementType, property);
}
}
} else {
ser = provider.handleSecondaryContextualization(ser, property);
}
if ((ser != _elementSerializer) || (property != _property) || _valueTypeSerializer != typeSer) {
return withResolved(property, typeSer, ser);
}
return this;
}
/*
/**********************************************************
/* Accessors
/**********************************************************
*/
@Override
public JavaType getContentType() {
return _elementType;
}
@Override
public JsonSerializer getContentSerializer() {
return _elementSerializer;
}
/*
/**********************************************************
/* Serialization
/**********************************************************
*/
@Override
public final void serialize(T value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
// [JACKSON-805]
if (provider.isEnabled(SerializationFeature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED)
&& hasSingleElement(value)) {
serializeContents(value, jgen, provider);
return;
}
jgen.writeStartArray();
serializeContents(value, jgen, provider);
jgen.writeEndArray();
}
// Note: was 'final' modifier in 2.2 and before; no real need to be, removed
@Override
public void serializeWithType(T value, JsonGenerator jgen, SerializerProvider provider,
TypeSerializer typeSer)
throws IOException, JsonGenerationException
{
// note: let's NOT consider [JACKSON-805] here; gets too complicated, and probably just won't work
typeSer.writeTypePrefixForArray(value, jgen);
serializeContents(value, jgen, provider);
typeSer.writeTypeSuffixForArray(value, jgen);
}
protected abstract void serializeContents(T value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException;
@SuppressWarnings("deprecation")
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
throws JsonMappingException
{
ObjectNode o = createSchemaNode("array", true);
JavaType contentType = _elementType;
if (contentType != null) {
JsonNode schemaNode = null;
// 15-Oct-2010, tatu: We can't serialize plain Object.class; but what should it produce here? Untyped?
if (contentType.getRawClass() != Object.class) {
JsonSerializer ser = provider.findValueSerializer(contentType, _property);
if (ser instanceof SchemaAware) {
schemaNode = ((SchemaAware) ser).getSchema(provider, null);
}
}
if (schemaNode == null) {
schemaNode = com.fasterxml.jackson.databind.jsonschema.JsonSchema.getDefaultSchemaNode();
}
o.put("items", schemaNode);
}
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonArrayFormatVisitor arrayVisitor = (visitor == null) ? null : visitor.expectArrayFormat(typeHint);
if (arrayVisitor != null) {
/* 01-Sep-2014, tatu: Earlier was trying to make use of 'typeHint' for some
* reason, causing NPE (as per https://github.com/FasterXML/jackson-module-jsonSchema/issues/34)
* if coupled with `@JsonValue`. But I can't see much benefit of trying to rely
* on TypeHint here so code is simplified like so:
*/
JsonSerializer valueSer = _elementSerializer;
if (valueSer == null) {
valueSer = visitor.getProvider().findValueSerializer(_elementType, _property);
}
arrayVisitor.itemsFormat(valueSer, _elementType);
}
}
protected final JsonSerializer _findAndAddDynamic(PropertySerializerMap map,
Class type, SerializerProvider provider) throws JsonMappingException
{
PropertySerializerMap.SerializerAndMapResult result = map.findAndAddSecondarySerializer(type, provider, _property);
// did we get a new map of serializers? If so, start using it
if (map != result.map) {
_dynamicSerializers = result.map;
}
return result.serializer;
}
protected final JsonSerializer _findAndAddDynamic(PropertySerializerMap map,
JavaType type, SerializerProvider provider) throws JsonMappingException
{
PropertySerializerMap.SerializerAndMapResult result = map.findAndAddSecondarySerializer(type, provider, _property);
if (map != result.map) {
_dynamicSerializers = result.map;
}
return result.serializer;
}
}
