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/introspect/ConcreteBeanPropertyBase.java

    package com.fasterxml.jackson.databind.introspect;
    
    import java.util.Collections;
    import java.util.List;
    
    import com.fasterxml.jackson.annotation.JsonFormat;
    import com.fasterxml.jackson.annotation.JsonInclude;
    import com.fasterxml.jackson.databind.AnnotationIntrospector;
    import com.fasterxml.jackson.databind.BeanProperty;
    import com.fasterxml.jackson.databind.PropertyMetadata;
    import com.fasterxml.jackson.databind.PropertyName;
    import com.fasterxml.jackson.databind.cfg.MapperConfig;
    
    /**
     * Intermediate {@link BeanProperty} class shared by concrete readable- and
     * writable property implementations for sharing common functionality.
     *
     * @since 2.7
     */
    public abstract class ConcreteBeanPropertyBase
        implements BeanProperty, java.io.Serializable
    {
        private static final long serialVersionUID = 1;
    
        /**
         * Additional information about property
         *
         * @since 2.3
         */
        protected final PropertyMetadata _metadata;
    
        /**
         * @since 2.9
         */
        protected transient List<PropertyName> _aliases;
    
        protected ConcreteBeanPropertyBase(PropertyMetadata md) {
            _metadata = (md == null) ? PropertyMetadata.STD_REQUIRED_OR_OPTIONAL : md;
        }
    
        protected ConcreteBeanPropertyBase(ConcreteBeanPropertyBase src) {
            _metadata = src._metadata;
        }
    
        @Override
        public boolean isRequired() { return _metadata.isRequired(); }
    
        @Override
        public PropertyMetadata getMetadata() { return _metadata; }
        
        @Override
        public boolean isVirtual() { return false; }
    
        @Override
        @Deprecated
        public final JsonFormat.Value findFormatOverrides(AnnotationIntrospector intr) {
            JsonFormat.Value f = null;
            if (intr != null) {
                AnnotatedMember member = getMember();
                if (member != null) {
                    f = intr.findFormat(member);
                }
            }
            if (f == null) {
                f = EMPTY_FORMAT;
            }
            return f;
        }
    
        @Override
        public JsonFormat.Value findPropertyFormat(MapperConfig<?> config, Class<?> baseType)
        {
            JsonFormat.Value v1 = config.getDefaultPropertyFormat(baseType);
            JsonFormat.Value v2 = null;
            AnnotationIntrospector intr = config.getAnnotationIntrospector();
            if (intr != null) {
                AnnotatedMember member = getMember();
                if (member != null) {
                    v2 = intr.findFormat(member);
                }
            }
            if (v1 == null) {
                return (v2 == null) ? EMPTY_FORMAT : v2;
            }
            return (v2 == null) ? v1 : v1.withOverrides(v2);
        }
    
        @Override
        public JsonInclude.Value findPropertyInclusion(MapperConfig<?> config, Class<?> baseType)
        {
            AnnotationIntrospector intr = config.getAnnotationIntrospector();
            AnnotatedMember member = getMember();
            if (member == null) {
                JsonInclude.Value def = config.getDefaultPropertyInclusion(baseType);
                return def;
            }
            JsonInclude.Value v0 = config.getDefaultInclusion(baseType, member.getRawType());
            if (intr == null) {
                return v0;
            }
            JsonInclude.Value v = intr.findPropertyInclusion(member);
            if (v0 == null) {
                return v;
            }
            return v0.withOverrides(v);
        }
    
        @Override
        public List<PropertyName> findAliases(MapperConfig<?> config)
        {
            List<PropertyName> aliases = _aliases;
            if (aliases == null) {
                AnnotationIntrospector intr = config.getAnnotationIntrospector();
                if (intr != null) {
                    final AnnotatedMember member = getMember();
                    if (member != null) {
                        aliases = intr.findPropertyAliases(member);
                    }
                }
                if (aliases == null) {
                    aliases = Collections.emptyList();
                }
                _aliases = aliases;
            }
            return aliases;
        }
    }
    

    com/fasterxml/jackson/databind/introspect/ConcreteBeanPropertyBase.java

     

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    2022-03-29, 32306👍, 0💬