Package com.salesforce.multicloudj.docstore.gcp

Class SpannerDecoder

java.lang.Object
com.salesforce.multicloudj.docstore.gcp.SpannerDecoder
All Implemented Interfaces:
Decoder
public class SpannerDecoder extends Object implements Decoder
SpannerDecoder implements the Decoder interface for Google Cloud Spanner. It converts Spanner Struct types into Java objects for retrieval from Spanner.

This decoder handles: - Primitive types (boolean, int, long, double, string) - Byte arrays - Lists and arrays - Maps and structs - Null values

  • Constructor Details

    • SpannerDecoder

      public SpannerDecoder(com.google.cloud.spanner.Struct struct)
      Creates a new SpannerDecoder with the specified Struct.
      Parameters:
      struct - The Spanner Struct to decode

    • SpannerDecoder

      public SpannerDecoder(com.google.cloud.spanner.Value value)

  • Method Details

    • asString

      public String asString()
      Decodes a Spanner Value into a string.
      Specified by:
      asString in interface Decoder
      Returns:
      The decoded string value, or null if the value is null

    • asInt

      public Integer asInt()
      Decodes a Spanner Value into an integer.
      Specified by:
      asInt in interface Decoder
      Returns:
      The decoded integer value, or null if the value is null

    • asLong

      public Long asLong()
      Decodes a Spanner Value into a long.
      Specified by:
      asLong in interface Decoder
      Returns:
      The decoded long value, or null if the value is null

    • asFloat

      public Float asFloat()
      Decodes a Spanner Value into a float.
      Specified by:
      asFloat in interface Decoder
      Returns:
      The decoded float value, or null if the value is null

    • asDouble

      public Double asDouble()
      Decodes a Spanner Value into a double.
      Specified by:
      asDouble in interface Decoder
      Returns:
      The decoded double value, or null if the value is null

    • asBytes

      public byte[] asBytes()
      Decodes a Spanner Value into a byte array.
      Specified by:
      asBytes in interface Decoder
      Returns:
      The decoded byte array, or null if the value is null

    • asBool

      public Boolean asBool()
      Decodes a Spanner Value into a boolean.
      Specified by:
      asBool in interface Decoder
      Returns:
      The decoded boolean value, or null if the value is null

    • asNull

      public Boolean asNull()
      Checks if the Spanner Value is null.
      Specified by:
      asNull in interface Decoder
      Returns:
      true if the value is null, false otherwise

    • decodeList

      public void decodeList(ListDecoderCallback callback)
      Decodes a list of Spanner Values using the provided callback.
      Specified by:
      decodeList in interface Decoder
      Parameters:
      callback - The callback to handle each list element

    • listLen

      public int listLen()
      Gets the length of the list in the Spanner Value.
      Specified by:
      listLen in interface Decoder
      Returns:
      The number of elements in the list

    • decodeMap

      public void decodeMap(MapDecoderCallback callback)
      Decodes a map of Spanner Values using the provided callback.
      Specified by:
      decodeMap in interface Decoder
      Parameters:
      callback - The callback to handle each map entry

    • asInterface

      public Object asInterface()
      Converts the Spanner Value into a Java object. This method handles all supported Spanner types and converts them into their corresponding Java types.
      Specified by:
      asInterface in interface Decoder
      Returns:
      The converted Java object

    • setValue

      public void setValue(com.google.cloud.spanner.Value value)
      Sets the current value to decode.
      Parameters:
      value - The value to decode