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com.fasterxml.jackson.databind.ser.impl.UnwrappingBeanSerializer Maven / Gradle / Ivy
General data-binding functionality for Jackson: works on core streaming API
package com.fasterxml.jackson.databind.ser.impl;
import java.io.IOException;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.io.SerializedString;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.ser.*;
import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase;
import com.fasterxml.jackson.databind.util.NameTransformer;
public class UnwrappingBeanSerializer
extends BeanSerializerBase
{
/**
* Transformer used to add prefix and/or suffix for properties
* of unwrapped POJO.
*/
protected final NameTransformer _nameTransformer;
/*
/**********************************************************
/* Life-cycle: constructors
/**********************************************************
*/
/**
* Constructor used for creating unwrapping instance of a
* standard BeanSerializer
*/
public UnwrappingBeanSerializer(BeanSerializerBase src, NameTransformer transformer) {
super(src, transformer);
_nameTransformer = transformer;
}
public UnwrappingBeanSerializer(UnwrappingBeanSerializer src, ObjectIdWriter objectIdWriter) {
super(src, objectIdWriter);
_nameTransformer = src._nameTransformer;
}
protected UnwrappingBeanSerializer(UnwrappingBeanSerializer src, String[] toIgnore) {
super(src, toIgnore);
_nameTransformer = src._nameTransformer;
}
/*
/**********************************************************
/* Life-cycle: factory methods, fluent factories
/**********************************************************
*/
@Override
public JsonSerializer unwrappingSerializer(NameTransformer transformer) {
// !!! 23-Jan-2012, tatu: Should we chain transformers?
return new UnwrappingBeanSerializer(this, transformer);
}
@Override
public boolean isUnwrappingSerializer() {
return true; // sure is
}
@Override
public UnwrappingBeanSerializer withObjectIdWriter(ObjectIdWriter objectIdWriter) {
return new UnwrappingBeanSerializer(this, objectIdWriter);
}
@Override
protected UnwrappingBeanSerializer withIgnorals(String[] toIgnore) {
return new UnwrappingBeanSerializer(this, toIgnore);
}
/**
* JSON Array output can not be done if unwrapping operation is
* requested; so implementation will simply return 'this'.
*/
@Override
protected BeanSerializerBase asArraySerializer() {
return this;
}
/*
/**********************************************************
/* JsonSerializer implementation that differs between impls
/**********************************************************
*/
/**
* Main serialization method that will delegate actual output to
* configured
* {@link BeanPropertyWriter} instances.
*/
@Override
public final void serialize(Object bean, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
if (_objectIdWriter != null) {
serializeWithObjectId(bean, jgen, provider);
return;
}
if (_propertyFilterId != null) {
serializeFieldsFiltered(bean, jgen, provider);
} else {
serializeFields(bean, jgen, provider);
}
}
private final void serializeWithObjectId(Object bean, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
final ObjectIdWriter w = _objectIdWriter;
WritableObjectId oid = provider.findObjectId(bean, w.generator);
Object id = oid.id;
if (id != null) { // have seen before; serialize just id
oid.serializer.serialize(id, jgen, provider);
return;
}
// if not, bit more work:
oid.serializer = w.serializer;
oid.id = id = oid.generator.generateId(bean);
// possibly. Or maybe not:
if (w.alwaysAsId) {
oid.serializer.serialize(id, jgen, provider);
return;
}
jgen.writeStartObject();
SerializedString name = w.propertyName;
if (name != null) {
jgen.writeFieldName(name);
w.serializer.serialize(id, jgen, provider);
}
if (_propertyFilterId != null) {
serializeFieldsFiltered(bean, jgen, provider);
} else {
serializeFields(bean, jgen, provider);
}
jgen.writeEndObject();
}
/*
/**********************************************************
/* Standard methods
/**********************************************************
*/
@Override public String toString() {
return "UnwrappingBeanSerializer for "+handledType().getName();
}
}
