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/ext/CoreXMLSerializers.java

    package com.fasterxml.jackson.databind.ext;
    
    import java.io.IOException;
    import java.util.Calendar;
    
    import javax.xml.datatype.Duration;
    import javax.xml.datatype.XMLGregorianCalendar;
    import javax.xml.namespace.QName;
    
    import com.fasterxml.jackson.core.*;
    import com.fasterxml.jackson.databind.*;
    import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
    import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
    import com.fasterxml.jackson.databind.ser.ContextualSerializer;
    import com.fasterxml.jackson.databind.ser.Serializers;
    import com.fasterxml.jackson.databind.ser.std.CalendarSerializer;
    import com.fasterxml.jackson.databind.ser.std.StdSerializer;
    import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
    
    /**
     * Provider for serializers of XML types that are part of full JDK 1.5, but
     * that some alleged 1.5 platforms are missing (Android, GAE).
     * And for this reason these are added using more dynamic mechanism.
     *<p>
     * Note: since many of classes defined are abstract, caller must take
     * care not to just use straight equivalency check but rather consider
     * subclassing as well.
     */
    public class CoreXMLSerializers extends Serializers.Base
    {
        @Override
        public JsonSerializer<?> findSerializer(SerializationConfig config,
                JavaType type, BeanDescription beanDesc)
        {
            Class<?> raw = type.getRawClass();
            if (Duration.class.isAssignableFrom(raw) || QName.class.isAssignableFrom(raw)) {
                return ToStringSerializer.instance;
            }
            if (XMLGregorianCalendar.class.isAssignableFrom(raw)) {
                return XMLGregorianCalendarSerializer.instance;
            }
            return null;
        }
    
        @SuppressWarnings("serial")
        public static class XMLGregorianCalendarSerializer
            extends StdSerializer<XMLGregorianCalendar>
            implements ContextualSerializer
        {
            final static XMLGregorianCalendarSerializer instance = new XMLGregorianCalendarSerializer();
    
            final JsonSerializer<Object> _delegate;
            
            public XMLGregorianCalendarSerializer() {
                this(CalendarSerializer.instance);
            }
    
            @SuppressWarnings("unchecked")
            protected XMLGregorianCalendarSerializer(JsonSerializer<?> del) {
                super(XMLGregorianCalendar.class);
                _delegate = (JsonSerializer<Object>) del;
            }
    
            @Override
            public JsonSerializer<?> getDelegatee() {
                return _delegate;
            }
    
            @Override
            public boolean isEmpty(SerializerProvider provider, XMLGregorianCalendar value) {
                return _delegate.isEmpty(provider, _convert(value));
            }
    
            @Override
            public void serialize(XMLGregorianCalendar value, JsonGenerator gen, SerializerProvider provider)
                    throws IOException {
                _delegate.serialize(_convert(value), gen, provider);
            }
    
            @Override
            public void serializeWithType(XMLGregorianCalendar value, JsonGenerator gen, SerializerProvider provider,
                    TypeSerializer typeSer) throws IOException
            {
                _delegate.serializeWithType(_convert(value), gen, provider, typeSer);
            }
    
            @Override
            public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException {
                _delegate.acceptJsonFormatVisitor(visitor, null);
            }
    
            @Override
            public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property)
                    throws JsonMappingException {
                JsonSerializer<?> ser = prov.handlePrimaryContextualization(_delegate, property);
                if (ser != _delegate) {
                    return new XMLGregorianCalendarSerializer(ser);
                }
                return this;
            }
    
            protected Calendar _convert(XMLGregorianCalendar input) {
                return (input == null) ? null : input.toGregorianCalendar();
            }
        }
    }
    

    com/fasterxml/jackson/databind/ext/CoreXMLSerializers.java

     

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    2022-03-29, 32027👍, 0💬