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io.honeybadger.com.fasterxml.jackson.databind.ser.std.IterableSerializer Maven / Gradle / Ivy
package com.fasterxml.jackson.databind.ser.std;
import java.io.IOException;
import java.util.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.ContainerSerializer;
@JacksonStdImpl
@SuppressWarnings("serial")
public class IterableSerializer
extends AsArraySerializerBase>
{
public IterableSerializer(JavaType elemType, boolean staticTyping,
TypeSerializer vts) {
super(Iterable.class, elemType, staticTyping, vts, null);
}
public IterableSerializer(IterableSerializer src, BeanProperty property,
TypeSerializer vts, JsonSerializer valueSerializer,
Boolean unwrapSingle) {
super(src, property, vts, valueSerializer, unwrapSingle);
}
@Override
public ContainerSerializer _withValueTypeSerializer(TypeSerializer vts) {
return new IterableSerializer(this, _property, vts, _elementSerializer, _unwrapSingle);
}
@Override
public IterableSerializer withResolved(BeanProperty property,
TypeSerializer vts, JsonSerializer elementSerializer,
Boolean unwrapSingle) {
return new IterableSerializer(this, property, vts, elementSerializer, unwrapSingle);
}
@Override
public boolean isEmpty(SerializerProvider prov, Iterable value) {
// Not really good way to implement this, but has to do for now:
return (value == null) || !value.iterator().hasNext();
}
@Override
public boolean hasSingleElement(Iterable value) {
// we can do it actually (fixed in 2.3.1)
if (value != null) {
Iterator it = value.iterator();
if (it.hasNext()) {
it.next();
if (!it.hasNext()) {
return true;
}
}
}
return false;
}
@Override
public final void serialize(Iterable value, JsonGenerator gen,
SerializerProvider provider)throws IOException
{
if (((_unwrapSingle == null) &&
provider.isEnabled(SerializationFeature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED))
|| (_unwrapSingle == Boolean.TRUE)) {
if (hasSingleElement(value)) {
serializeContents(value, gen, provider);
return;
}
}
gen.writeStartArray();
serializeContents(value, gen, provider);
gen.writeEndArray();
}
@Override
public void serializeContents(Iterable value, JsonGenerator jgen,
SerializerProvider provider) throws IOException
{
Iterator it = value.iterator();
if (it.hasNext()) {
final TypeSerializer typeSer = _valueTypeSerializer;
JsonSerializer prevSerializer = null;
Class prevClass = null;
do {
Object elem = it.next();
if (elem == null) {
provider.defaultSerializeNull(jgen);
continue;
}
JsonSerializer currSerializer = _elementSerializer;
if (currSerializer == null) {
// Minor optimization to avoid most lookups:
Class cc = elem.getClass();
if (cc == prevClass) {
currSerializer = prevSerializer;
} else {
currSerializer = provider.findValueSerializer(cc, _property);
prevSerializer = currSerializer;
prevClass = cc;
}
}
if (typeSer == null) {
currSerializer.serialize(elem, jgen, provider);
} else {
currSerializer.serializeWithType(elem, jgen, provider, typeSer);
}
} while (it.hasNext());
}
}
}
