Jackson Data Binding Source Code

Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

  • Jackson Data Binding module allows you to converts JSON to and from POJO (Plain Old Java Object) using property accessor or using annotations.
  • Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.12.4-sources.jar). You can download it at Jackson Maven Website.

    You can also browse Jackson Databind Source Code below:

    ✍: FYIcenter.com

    com/fasterxml/jackson/databind/ser/std/ToStringSerializerBase.java

    package com.fasterxml.jackson.databind.ser.std;
    
    import java.io.IOException;
    import java.lang.reflect.Type;
    
    import com.fasterxml.jackson.core.JsonGenerator;
    import com.fasterxml.jackson.core.JsonToken;
    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.jsonFormatVisitors.JsonFormatVisitorWrapper;
    import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
    
    /**
     * Intermediate base class that serves as base for standard {@link ToStringSerializer}
     * as well as for custom subtypes that want to add processing for converting from
     * value to output into its {@code String} representation (whereas standard version
     * simply calls value object's {@code toString()} method).
     *
     * @since 2.10
     */
    @SuppressWarnings("serial")
    public abstract class ToStringSerializerBase
        extends StdSerializer<Object>
    {
        public ToStringSerializerBase(Class<?> handledType) {
            super(handledType, false);
        }
    
        @Override
        public boolean isEmpty(SerializerProvider prov, Object value) {
            return valueToString(value).isEmpty();
        }
    
        @Override
        public void serialize(Object value, JsonGenerator gen, SerializerProvider provider)
            throws IOException
        {
            gen.writeString(valueToString(value));
        }
    
        /**
         * Default implementation will write type prefix, call regular serialization
         * method (since assumption is that value itself does not need JSON
         * Array or Object start/end markers), and then write type suffix.
         * This should work for most cases; some sub-classes may want to
         * change this behavior.
         */
        @Override
        public void serializeWithType(Object value, JsonGenerator g, SerializerProvider provider,
                TypeSerializer typeSer)
            throws IOException
        {
            WritableTypeId typeIdDef = typeSer.writeTypePrefix(g,
                    typeSer.typeId(value, JsonToken.VALUE_STRING));
            serialize(value, g, provider);
            typeSer.writeTypeSuffix(g, typeIdDef);
        }
    
        @Override
        public JsonNode getSchema(SerializerProvider provider, Type typeHint) throws JsonMappingException {
            return createSchemaNode("string", true);
        }
    
        @Override
        public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException
        {
            visitStringFormat(visitor, typeHint);
        }
    
        public abstract String valueToString(Object value);
    }
    

    com/fasterxml/jackson/databind/ser/std/ToStringSerializerBase.java

     

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    2022-03-29, 31974👍, 0💬