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.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;

This is the special serializer for regular Strings. 

Since this is one of "native" types, no type information is ever
included on serialization (unlike for most scalar types as of 1.5)
/**
 * This is the special serializer for regular {@link java.lang.String}s.
 *<p>
 * Since this is one of "native" types, no type information is ever
 * included on serialization (unlike for most scalar types as of 1.5)
 */
@JacksonStdImpl
public final class StringSerializer
// NOTE: generic parameter changed from String to Object in 2.6, to avoid
//   use of bridge methods
// In 2.9, removed use of intermediate type `NonTypedScalarSerializerBase`
    extends StdScalarSerializer<Object>
{
    private static final long serialVersionUID = 1L;

    public StringSerializer() { super(String.class, false); }

    @Override
    public boolean isEmpty(SerializerProvider prov, Object value) {
        String str = (String) value;
        return str.length() == 0;
    }

    @Override
    public void serialize(Object value, JsonGenerator gen, SerializerProvider provider) throws IOException {
        gen.writeString((String) value);
    }

    @Override
    public final void serializeWithType(Object value, JsonGenerator gen, SerializerProvider provider,
            TypeSerializer typeSer) throws IOException
    {
        // no type info, just regular serialization
        gen.writeString((String) value);
    }

    @Override
    public JsonNode getSchema(SerializerProvider provider, Type typeHint) {
        return createSchemaNode("string", true);
    }

    @Override
    public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException {
        visitStringFormat(visitor, typeHint);
    }
}