package com.fasterxml.jackson.databind.ser.std;

import java.io.IOException;
import java.lang.reflect.Type;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.type.WritableTypeId;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.util.TokenBuffer;

We also want to directly support serialization of TokenBuffer; and since it is part of core package, it cannot implement JsonSerializable (which is only included in the mapper package) /**
 * We also want to directly support serialization of {@link TokenBuffer};
 * and since it is part of core package, it cannot implement
 * {@link com.fasterxml.jackson.databind.JsonSerializable}
 * (which is only included in the mapper package)
 */
@JacksonStdImpl
@SuppressWarnings("serial")
public class TokenBufferSerializer
    extends StdSerializer<TokenBuffer>
{
    public TokenBufferSerializer() { super(TokenBuffer.class); }

    @Override
    public void serialize(TokenBuffer value, JsonGenerator jgen, SerializerProvider provider)
        throws IOException
    {
        value.serialize(jgen);
    }

    
Implementing typed output for contents of a TokenBuffer is very tricky,
since we do not know for sure what its contents might look like (or, rather,
we do know when serializing, but not necessarily when deserializing!)
One possibility would be to check the current token, and use that to
determine if we would output JSON Array, Object or scalar value.

Note that we just claim it is scalar; this should work ok and is simpler
than doing introspection on both serialization and deserialization.
/**
     * Implementing typed output for contents of a TokenBuffer is very tricky,
     * since we do not know for sure what its contents might look like (or, rather,
     * we do know when serializing, but not necessarily when deserializing!)
     * One possibility would be to check the current token, and use that to
     * determine if we would output JSON Array, Object or scalar value.
     *<p>
     * Note that we just claim it is scalar; this should work ok and is simpler
     * than doing introspection on both serialization and deserialization.
     */
    @Override
    public final void serializeWithType(TokenBuffer value, JsonGenerator g,
            SerializerProvider provider, TypeSerializer typeSer) throws IOException
    {
        // 28-Jun-2017, tatu: As per javadoc, not sure what to report as likely shape. Could
        //    even look into first actual token inside... but, for now let's keep it simple
        WritableTypeId typeIdDef = typeSer.writeTypePrefix(g,
                typeSer.typeId(value, JsonToken.VALUE_EMBEDDED_OBJECT));
        serialize(value, g, provider);
        typeSer.writeTypeSuffix(g, typeIdDef);
    }

    @Override
    public JsonNode getSchema(SerializerProvider provider, Type typeHint)
    {
        // Not 100% sure what we should say here: type is basically not known.
        // This seems like closest approximation
        return createSchemaNode("any", true);
    }
    
    @Override
    public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
        throws JsonMappingException
    {
        // Not 100% sure what we should say here: type is basically not known.
        // This seems like closest approximation
        visitor.expectAnyFormat(typeHint);
    }
}