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This is a drop in replacement for the auth0 java-jwt library (see https://github.com/auth0/java-jwt). This jar makes sure there are no external dependencies (e.g. fasterXml, Apacha Commons) needed. This is useful when deploying to an application server (e.g. tomcat with Alfreso or Pega).

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package com.fasterxml.jackson.databind.util;

import java.io.IOException;

import com.fasterxml.jackson.core.*;

import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;

/**
 * Container class that can be used to wrap any Object instances (including
 * nulls), and will serialize embedded in
 * JSONP wrapping.
 * 
 * @see com.fasterxml.jackson.databind.util.JSONWrappedObject
 * 
 * @author tatu
 */
public class JSONPObject
    implements JsonSerializable
{
    /**
     * JSONP function name to use for serialization
     */
    protected final String _function;
    
    /**
     * Value to be serialized as JSONP padded; can be null.
     */
    protected final Object _value;

    /**
     * Optional static type to use for serialization; if null, runtime
     * type is used. Can be used to specify declared type which defines
     * serializer to use, as well as aspects of extra type information
     * to include (if any).
     */
    protected final JavaType _serializationType;

    public JSONPObject(String function, Object value) {
        this(function, value, (JavaType) null);
    }

    public JSONPObject(String function, Object value, JavaType asType)
    {
        _function = function;
        _value = value;
        _serializationType = asType;
    }
    
    /*
    /**********************************************************
    /* JsonSerializable(WithType) implementation
    /**********************************************************
     */

    @Override
    public void serializeWithType(JsonGenerator jgen, SerializerProvider provider, TypeSerializer typeSer)
            throws IOException, JsonProcessingException
    {
        // No type for JSONP wrapping: value serializer will handle typing for value:
        serialize(jgen, provider);
    }

    @Override
    public void serialize(JsonGenerator jgen, SerializerProvider provider)
            throws IOException, JsonProcessingException
    {
        // First, wrapping:
        jgen.writeRaw(_function);
        jgen.writeRaw('(');
        if (_value == null) {
            provider.defaultSerializeNull(jgen);
        } else if (_serializationType != null) {
            provider.findTypedValueSerializer(_serializationType, true, null).serialize(_value, jgen, provider);
        } else {
            Class cls = _value.getClass();
            provider.findTypedValueSerializer(cls, true, null).serialize(_value, jgen, provider);
        }
        jgen.writeRaw(')');
    }

    /*
    /**************************************************************
    /* Accessors
    /**************************************************************
     */
    
    public String getFunction() { return _function; }
    public Object getValue() { return _value; }
    public JavaType getSerializationType() { return _serializationType; }
}