Module com.couchbase.columnar.client.java
Package com.couchbase.columnar.client.java.json

Class JsonObject

java.lang.Object
com.couchbase.columnar.client.java.json.JsonValue
com.couchbase.columnar.client.java.json.JsonObject
public final class JsonObject extends JsonValue
Represents a JSON object that can be stored and loaded from Couchbase Server.

If boxed return values are unboxed, the calling code needs to make sure to handle potential NullPointerExceptions.

The JsonObject is backed by a Map and is intended to work similar to it API wise, but to only allow to store such objects which can be represented by JSON.

  • Method Details

    • create

      public static JsonObject create()
      Creates an empty JsonObject.
      Returns:
      an empty JsonObject.

    • create

      public static JsonObject create(int initialCapacity)
      Creates an empty JsonObject.
      Parameters:
      initialCapacity - the initial capacity for the object.
      Returns:
      an empty JsonObject.

    • from

      public static JsonObject from(Map<String,?> mapData)
      Constructs a JsonObject from a Map<String, ?>.

      This is only possible if the given Map is well-formed, that is it contains non-null keys, and all values are of a supported type.

      A null input Map or null key will lead to a NullPointerException being thrown. If any unsupported value is present in the Map, an IllegalArgumentException will be thrown.

      *Sub Maps and Lists* If possible, Maps and Lists contained in mapData will be converted to JsonObject and JsonArray respectively. However, same restrictions apply. Any non-convertible collection will raise a ClassCastException. If the sub-conversion raises an exception (like an InvalidArgumentException) then it is put as cause for the ClassCastException.

      Parameters:
      mapData - the Map to convert to a JsonObject
      Returns:
      the resulting JsonObject
      Throws:
      IllegalArgumentException - in case one or more unsupported values are present
      NullPointerException - in case a null map is provided or if it contains a null key
      ClassCastException - if map contains a sub-Map or sub-List not supported (see above)

    • fromJson

      public static JsonObject fromJson(String jsonObject)
      Static method to create a JsonObject from a JSON String.

      The string is expected to be a valid JSON object representation (eg. starting with a '{').

      Parameters:
      jsonObject - the JSON String to convert to a JsonObject.
      Returns:
      the corresponding JsonObject.
      Throws:
      IllegalArgumentException - if the conversion cannot be done.

    • fromJson

      public static JsonObject fromJson(byte[] jsonObject)

    • put

      public JsonObject put(String name, @Nullable Object value)
      Stores a Object value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.
      Throws:
      IllegalArgumentException - if the value is not a supported JSON type

    • get

      public @Nullable Object get(String name)
      Retrieves the (potential null) content and not casting its type.
      Parameters:
      name - the key of the field.
      Returns:
      the value of the field, or null if it does not exist.

    • put

      public JsonObject put(String name, @Nullable String value)
      Stores a String value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • getString

      public @Nullable String getString(String name)
      Retrieves the value from the field name and casts it to String.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • put

      public JsonObject put(String name, int value)
      Stores a Integer value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • getInt

      public @Nullable Integer getInt(String name)
      Retrieves the value from the field name and casts it to Integer.

      Note that if value was stored as another numerical type, some truncation or rounding may occur.

      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • put

      public JsonObject put(String name, long value)
      Stores a Long value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • getLong

      public @Nullable Long getLong(String name)
      Retrieves the value from the field name and casts it to Long.

      Note that if value was stored as another numerical type, some truncation or rounding may occur.

      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • put

      public JsonObject put(String name, double value)
      Stores a Double value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • getDouble

      public @Nullable Double getDouble(String name)
      Retrieves the value from the field name and casts it to Double.

      Note that if value was stored as another numerical type, some truncation or rounding may occur.

      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • put

      public JsonObject put(String name, boolean value)
      Stores a Boolean value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • getBoolean

      public @Nullable Boolean getBoolean(String name)
      Retrieves the value from the field name and casts it to Boolean.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • put

      public JsonObject put(String name, @Nullable JsonObject value)
      Stores a JsonObject value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • put

      public JsonObject put(String name, @Nullable Map<String,?> value)
      Attempt to convert a Map to a JsonObject value and store it, identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.
      See Also:

    • getObject

      public @Nullable JsonObject getObject(String name)
      Retrieves the value from the field name and casts it to JsonObject.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • put

      public JsonObject put(String name, @Nullable JsonArray value)
      Stores a JsonArray value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • put

      public JsonObject put(String name, @Nullable Number value)
      Stores a Number value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • put

      public JsonObject put(String name, @Nullable List<?> value)
      Stores a JsonArray value identified by the field name.
      Parameters:
      name - the name of the JSON field.
      value - the value of the JSON field.
      Returns:
      the JsonObject.

    • getArray

      public @Nullable JsonArray getArray(String name)
      Retrieves the value from the field name and casts it to JsonArray.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • getBigInteger

      public @Nullable BigInteger getBigInteger(String name)
      Retrieves the value from the field name and casts it to BigInteger.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • getBigDecimal

      public @Nullable BigDecimal getBigDecimal(String name)
      Retrieves the value from the field name and casts it to BigDecimal.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • getNumber

      public @Nullable Number getNumber(String name)
      Retrieves the value from the field name and casts it to Number.
      Parameters:
      name - the name of the field.
      Returns:
      the result or null if it does not exist.

    • putNull

      public JsonObject putNull(String name)
      Store a null value identified by the field's name.

      This method is equivalent to calling put(String, Object) with a null value explicitly cast to Object.

      Parameters:
      name - The null field's name.
      Returns:
      the JsonObject

    • removeKey

      public JsonObject removeKey(String name)
      Removes an entry from the JsonObject.
      Parameters:
      name - the name of the field to remove
      Returns:
      the JsonObject

    • getNames

      public Set<String> getNames()
      Returns a set of field names on the JsonObject.
      Returns:
      the set of names on the object.

    • isEmpty

      public boolean isEmpty()
      Returns true if the JsonObject is empty, false otherwise.
      Returns:
      true if empty, false otherwise.

    • toMap

      public Map<String,@Nullable Object> toMap()
      Transforms the JsonObject into a Map. The resulting map is not backed by this JsonObject, and all sub-objects or sub-arrays (JsonArray) are also recursively converted to maps and lists, respectively.
      Returns:
      the content copied as a Map.

    • containsKey

      public boolean containsKey(String name)
      Checks if the JsonObject contains the field name.
      Parameters:
      name - the name of the field.
      Returns:
      true if its contained, false otherwise.

    • containsValue

      public boolean containsValue(Object value)
      Checks if the JsonObject contains the value.
      Parameters:
      value - the actual value.
      Returns:
      true if its contained, false otherwise.

    • size

      public int size()
      The size of the JsonObject.
      Returns:
      the size.

    • toString

      public String toString()
      Converts the JsonObject into its JSON string representation.
      Overrides:
      toString in class Object
      Returns:
      the JSON string representing this JsonObject.

    • toBytes

      public byte[] toBytes()
      Similar to toString() but turns this object directly into an encoded byte array.
      Returns:
      the byte array representing this JsonObject.

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object