com.fasterxml.jackson.databind.ser.impl.WritableObjectId Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
package com.fasterxml.jackson.databind.ser.impl;
import java.io.IOException;
import com.fasterxml.jackson.annotation.ObjectIdGenerator;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.SerializableString;
import com.fasterxml.jackson.databind.SerializerProvider;
/**
* Simple value container used to keep track of Object Ids during
* serialization.
*/
public final class WritableObjectId
{
public final ObjectIdGenerator> generator;
public Object id;
/**
* Marker to denote whether Object Id value has been written as part of an Object,
* to be referencible. Remains false when forward-reference is written.
*/
protected boolean idWritten = false;
public WritableObjectId(ObjectIdGenerator> generator) {
this.generator = generator;
}
public boolean writeAsId(JsonGenerator gen, SerializerProvider provider, ObjectIdWriter w) throws IOException
{
if ((id != null) && (idWritten || w.alwaysAsId)) {
// 03-Aug-2013, tatu: Prefer Native Object Ids if available
if (gen.canWriteObjectId()) {
gen.writeObjectRef(String.valueOf(id));
} else {
w.serializer.serialize(id, gen, provider);
}
return true;
}
return false;
}
public Object generateId(Object forPojo) {
// 04-Jun-2016, tatu: As per [databind#1255], need to consider possibility of
// id being generated for "alwaysAsId", but not being written as POJO; regardless,
// need to use existing id if there is one:
if (id == null) {
id = generator.generateId(forPojo);
}
return id;
}
/**
* Method called to output Object Id as specified.
*/
public void writeAsField(JsonGenerator gen, SerializerProvider provider,
ObjectIdWriter w) throws IOException
{
idWritten = true;
// 03-Aug-2013, tatu: Prefer Native Object Ids if available
if (gen.canWriteObjectId()) {
// Need to assume String(ified) ids, for now... could add 'long' variant?
// 05-Feb-2019, tatu: But in special case of `null` we should not coerce -- whether
// we should even call is an open question, but for now do pass to let generator
// decide what to do, if anything.
String idStr = (id == null) ? null : String.valueOf(id);
gen.writeObjectId(idStr);
return;
}
SerializableString name = w.propertyName;
if (name != null) {
// 05-Feb-2019, tatu: How about `null` id? For now, write
gen.writeFieldName(name);
w.serializer.serialize(id, gen, provider);
}
}
}
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