Class BsonUtils

java.lang.Object
org.springframework.data.mongodb.util.BsonUtils
public class BsonUtils extends Object
Internal API for operations on Bson elements that can be either Document or DBObject.
Since:
2.0
Author:
Christoph Strobl, Mark Paluch

  • Field Details

    • EMPTY_DOCUMENT

      public static final Document EMPTY_DOCUMENT
      The empty document (immutable). This document is serializable.
      Since:
      3.2.5

  • Constructor Details

    • BsonUtils

      public BsonUtils()

  • Method Details

    • get

      @Contract("null, _ -> null") public static <T> @Nullable T get(@Nullable Bson bson, String key)

    • asMap

      public static Map<String,Object> asMap(@Nullable Bson bson)
      Return the Bson object as Map. Depending on the input type, the return value can be either a casted version of bson or a converted (detached from the original value).
      Parameters:
      bson -
      Returns:

    • asMap

      public static Map<String,Object> asMap(@Nullable Bson bson, CodecRegistry codecRegistry)
      Return the Bson object as Map. Depending on the input type, the return value can be either a casted version of bson or a converted (detached from the original value) using the given CodecRegistry to obtain codecs that might be required for conversion.
      Parameters:
      bson - can be null.
      codecRegistry - must not be null.
      Returns:
      never null. Returns an empty Map if input Bson is null.
      Since:
      4.0

    • asDocument

      public static Document asDocument(@Nullable Bson bson)
      Return the Bson object as Document. Depending on the input type, the return value can be either a casted version of bson or a converted (detached from the original value).
      Parameters:
      bson -
      Returns:
      Since:
      3.2.5

    • asDocument

      public static Document asDocument(@Nullable Bson bson, CodecRegistry codecRegistry)
      Return the Bson object as Document. Depending on the input type, the return value can be either a casted version of bson or a converted (detached from the original value) using the given CodecRegistry to obtain codecs that might be required for conversion.
      Parameters:
      bson -
      codecRegistry - must not be null.
      Returns:
      never null.
      Since:
      4.0

    • asMutableDocument

      public static Document asMutableDocument(Bson bson)
      Return the Bson object as mutable Document containing all entries from Bson.
      Parameters:
      bson -
      Returns:
      a mutable Document containing all entries from Bson.
      Since:
      3.2.5

    • addToMap

      public static void addToMap(Bson bson, String key, @Nullable Object value)

    • addAllToMap

      public static void addAllToMap(Bson target, Map<String,?> source)
      Add all entries from the given source Map to the target.
      Parameters:
      target - must not be null.
      source - must not be null.
      Since:
      3.2

    • contains

      public static boolean contains(Bson bson, String key, @Nullable Object value)
      Check if a given entry (key/value pair) is present in the given Bson.
      Parameters:
      bson - must not be null.
      key - must not be null.
      value - can be null.
      Returns:
      true if (key/value pair) is present.
      Since:
      3.2

    • removeNullId

      public static boolean removeNullId(Bson bson)
      Remove _id : null from the given Bson if present.
      Parameters:
      bson - must not be null.
      Since:
      3.2

    • toJavaType

      public static Object toJavaType(BsonValue value)
      Extract the corresponding plain value from BsonValue. Eg. plain String from BsonString.
      Parameters:
      value - must not be null.
      Returns:
      Since:
      2.1

    • simpleToBsonValue

      public static BsonValue simpleToBsonValue(@Nullable Object source)
      Convert a given simple value (eg. String, Long) to its corresponding BsonValue.
      Parameters:
      source - must not be null.
      Returns:
      the corresponding BsonValue representation.
      Throws:
      IllegalArgumentException - if source does not correspond to a BsonValue type.
      Since:
      3.0

    • simpleToBsonValue

      @Contract("null, _ -> !null") public static BsonValue simpleToBsonValue(@Nullable Object source, CodecRegistry codecRegistry)
      Convert a given simple value (eg. String, Long) to its corresponding BsonValue.
      Parameters:
      source - can be null.
      codecRegistry - The CodecRegistry used as a fallback to convert types using native Codec. Must not be null.
      Returns:
      the corresponding BsonValue representation.
      Throws:
      IllegalArgumentException - if source does not correspond to a BsonValue type.
      Since:
      4.2

    • merge

      public static Document merge(Document... documents)
      Merge the given documents into on in the given order. Keys contained within multiple documents are overwritten by their follow-ups.
      Parameters:
      documents - must not be null. Can be empty.
      Returns:
      the document containing all key value pairs.
      Since:
      2.2

    • toDocumentOrElse

      public static Document toDocumentOrElse(String source, Function<String,Document> orElse)
      Parameters:
      source -
      orElse -
      Returns:
      Since:
      2.2

    • toJson

      public static @Nullable String toJson(@Nullable Document source)
      Serialize the given Document as Json applying default codecs if necessary.
      Parameters:
      source -
      Returns:
      Since:
      2.2.1

    • isJsonDocument

      @Contract("null -> false") public static boolean isJsonDocument(@Nullable String value)
      Check if a given String looks like parsable json.
      Parameters:
      value - can be null.
      Returns:
      true if the given value looks like a json document.
      Since:
      3.0

    • isJsonArray

      @Contract("null -> false") public static boolean isJsonArray(@Nullable String value)
      Check if a given String looks like parsable json array.
      Parameters:
      value - can be null.
      Returns:
      true if the given value looks like a json array.
      Since:
      3.0

    • parse

      public static Document parse(String json, @Nullable CodecRegistryProvider codecRegistryProvider)
      Parse the given json to Document applying transformations as specified by a potentially given Codec.
      Parameters:
      json - must not be null.
      codecRegistryProvider - can be null. In that case the default DocumentCodec is used.
      Returns:
      never null.
      Throws:
      IllegalArgumentException - if the required argument is null.
      Since:
      3.0

    • resolveValue

      public static @Nullable Object resolveValue(Bson bson, String key)
      Resolve the value for a given key. If the given Bson value contains the key the value is immediately returned. If not and the key contains a path using the dot (.) notation it will try to resolve the path by inspecting the individual parts. If one of the intermediate ones is null or cannot be inspected further (wrong) type, null is returned.
      Parameters:
      bson - the source to inspect. Must not be null.
      key - the key to lookup. Must not be null.
      Returns:
      can be null.
      Since:
      3.0.8

    • resolveValue

      public static @Nullable Object resolveValue(Bson bson, FieldName fieldName)
      Resolve the value for a given field name. If the given name is a FieldName.Type.KEY the value is obtained from the target Bson immediately. If the given fieldName is a FieldName.Type.PATH maybe using the dot (.) notation it will try to resolve the path by inspecting the individual parts. If one of the intermediate ones is null or cannot be inspected further (wrong) type, null is returned.
      Parameters:
      bson - the source to inspect. Must not be null.
      fieldName - the name to lookup. Must not be null.
      Returns:
      can be null.
      Since:
      4.2

    • resolveValue

      public static @Nullable Object resolveValue(Map<String,Object> source, FieldName fieldName)
      Resolve the value for a given field name. If the given name is a FieldName.Type.KEY the value is obtained from the target Bson immediately. If the given fieldName is a FieldName.Type.PATH maybe using the dot (.) notation it will try to resolve the path by inspecting the individual parts. If one of the intermediate ones is null or cannot be inspected further (wrong) type, null is returned.
      Parameters:
      source - the source to inspect. Must not be null.
      fieldName - the key to lookup. Must not be null.
      Returns:
      can be null.
      Since:
      4.2

    • resolveValue

      public static @Nullable Object resolveValue(Map<String,Object> source, String key)
      Resolve the value for a given key. If the given Map value contains the key the value is immediately returned. If not and the key contains a path using the dot (.) notation it will try to resolve the path by inspecting the individual parts. If one of the intermediate ones is null or cannot be inspected further (wrong) type, null is returned.
      Parameters:
      source - the source to inspect. Must not be null.
      key - the key to lookup. Must not be null.
      Returns:
      can be null.
      Since:
      4.1

    • hasValue

      public static boolean hasValue(Bson bson, FieldName fieldName)

    • hasValue

      public static boolean hasValue(Bson bson, String key)
      Returns whether the underlying bson has a value (null or non-null) for the given key.
      Parameters:
      bson - the source to inspect. Must not be null.
      key - the key to lookup. Must not be null.
      Returns:
      true if no non null value present.
      Since:
      3.0.8

    • asBson

      public static Bson asBson(Object source)
      Returns the given source object as Bson, i.e. Documents and maps as is or throw IllegalArgumentException.
      Parameters:
      source -
      Returns:
      the converted/casted source object.
      Throws:
      IllegalArgumentException - if source cannot be converted/cast to Bson.
      Since:
      3.2.3
      See Also:

    • supportsBson

      public static boolean supportsBson(Object source)
      Returns the given source can be used/converted as Bson.
      Parameters:
      source -
      Returns:
      true if the given source can be converted to Bson.
      Since:
      3.2.3

    • asCollection

      public static Collection<?> asCollection(Object source)
      Returns given object as Collection. Will return the Collection as is if the source is a Collection already, will convert an array into a Collection or simply create a single element collection for everything else.
      Parameters:
      source - must not be null.
      Returns:
      never null.
      Since:
      3.2

    • mapValues

      public static Document mapValues(Document source, BiFunction<String,Object,Object> valueMapper)

    • mapEntries

      public static Document mapEntries(Document source, Function<Map.Entry<String,Object>, String> keyMapper, Function<Map.Entry<String,Object>, Object> valueMapper)