Package org.apache.beam.sdk.io.gcp.spanner.changestreams.model

Class Mod

  • All Implemented Interfaces:
    java.io.Serializable
    @DefaultCoder(org.apache.beam.sdk.coders.AvroCoder.class)
public class Mod
extends java.lang.Object
implements java.io.Serializable
    Represents a modification in a table emitted within a DataChangeRecord. Each mod contains keys, new values and old values returned as JSON strings.
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      Mod​(java.lang.String keysJson, java.lang.String oldValuesJson, java.lang.String newValuesJson)
      Constructs a mod from the primary key values, the old state of the row and the new state of the row.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object o)  
      java.lang.String getKeysJson()
      The primary keys of this specific modification.
      java.lang.String getNewValuesJson()
      The new column values after the modification was applied.
      java.lang.String getOldValuesJson()
      The old column values before the modification was applied.
      int hashCode()  
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • Mod

        public Mod​(java.lang.String keysJson,
           @Nullable
           java.lang.String oldValuesJson,
           @Nullable
           java.lang.String newValuesJson)
        Constructs a mod from the primary key values, the old state of the row and the new state of the row.
        Parameters:
        keysJson - JSON object as String, where the keys are the primary key column names and the values are the primary key column values
        oldValuesJson - JSON object as String, displaying the old state of the columns modified. This JSON object can be null in the case of an INSERT
        newValuesJson - JSON object as String, displaying the new state of the columns modified. This JSON object can be null in the case of a DELETE

    • Method Detail

      • getOldValuesJson

        @Nullable
public java.lang.String getOldValuesJson()
        The old column values before the modification was applied. This can be null when the modification was emitted for an INSERT operation. The values are returned as a JSON object (stringified), where the keys are the column names and the values are the column values.
        Returns:
        JSON object as String representing the old column values before the row was modified

      • getNewValuesJson

        @Nullable
public java.lang.String getNewValuesJson()
        The new column values after the modification was applied. This can be null when the modification was emitted for a DELETE operation. The values are returned as a JSON object (stringified), where the keys are the column names and the values are the column values.
        Returns:
        JSON object as String representing the new column values after the row was modified

      • getKeysJson

        public java.lang.String getKeysJson()
        The primary keys of this specific modification. This is always present and can not be null. The keys are returned as a JSON object (stringified), where the keys are the column names and the values are the column values.
        Returns:
        JSON object as String representing the primary key state for the row modified

      • equals

        public boolean equals​(@Nullable
                      java.lang.Object o)
        Overrides:
        equals in class java.lang.Object

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object