java.lang.Object
java.lang.Throwable
java.lang.Exception
com.thetransactioncompany.jsonrpc2.JSONRPC2Error
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
JSONRPC2ExtendedError
public class JSONRPC2Errorextends Exception
Represents a JSON-RPC 2.0 error that occurred during the processing of a request. This class is immutable.

The protocol expects error objects to be structured like this:

  • code An integer that indicates the error type.
  • message A string providing a short description of the error. The message should be limited to a concise single sentence.
  • data Additional information, which may be omitted. Its contents is entirely defined by the application.

Note that the "Error" word in the class name was put there solely to comply with the parlance of the JSON-RPC spec. This class doesn't inherit from java.lang.Error. It's a regular subclass of java.lang.Exception and, if thrown, it's to indicate a condition that a reasonable application might want to catch.

This class also includes convenient final static instances for all standard JSON-RPC 2.0 errors:

Note that the range -32099..-32000 is reserved for additional server errors.

The mapping between JSON and Java entities (as defined by the underlying JSON Smart library):

    true|false  <--->  java.lang.Boolean
    number      <--->  java.lang.Number
    string      <--->  java.lang.String
    array       <--->  java.util.List
    object      <--->  java.util.Map
    null        <--->  null
See Also:

  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      Serial version UID.
      See Also:

    • PARSE_ERROR

      public static final JSONRPC2Error PARSE_ERROR
      JSON parse error (-32700).

    • INVALID_REQUEST

      public static final JSONRPC2Error INVALID_REQUEST
      Invalid JSON-RPC 2.0 request error (-32600).

    • METHOD_NOT_FOUND

      public static final JSONRPC2Error METHOD_NOT_FOUND
      Method not found error (-32601).

    • INVALID_PARAMS

      public static final JSONRPC2Error INVALID_PARAMS
      Invalid parameters error (-32602).

    • INTERNAL_ERROR

      public static final JSONRPC2Error INTERNAL_ERROR
      Internal JSON-RPC 2.0 error (-32603).

    • code

      private final int code
      The error code.

    • data

      private final Object data
      The optional error data.

  • Constructor Details

    • JSONRPC2Error

      public JSONRPC2Error(int code, String message)
      Creates a new JSON-RPC 2.0 error with the specified code and message. The optional data is omitted.
      Parameters:
      code - The error code (standard pre-defined or application-specific).
      message - The error message.

    • JSONRPC2Error

      public JSONRPC2Error(int code, String message, Object data)
      Creates a new JSON-RPC 2.0 error with the specified code, message and data.
      Parameters:
      code - The error code (standard pre-defined or application-specific).
      message - The error message.
      data - Optional error data, must map to a valid JSON type.

  • Method Details

    • getCode

      public int getCode()
      Gets the JSON-RPC 2.0 error code.
      Returns:
      The error code.

    • getData

      public Object getData()
      Gets the JSON-RPC 2.0 error data.
      Returns:
      The error data, null if none was specified.

    • setData

      public JSONRPC2Error setData(Object data)
      Sets the specified data to a JSON-RPC 2.0 error.
      Parameters:
      data - Optional error data, must map to a valid JSON type.
      Returns:
      A new JSON-RPC 2.0 error with the set data.

    • appendMessage

      public JSONRPC2Error appendMessage(String apx)
      Appends the specified string to the message of this JSON-RPC 2.0 error.
      Parameters:
      apx - The string to append to the original error message.
      Returns:
      A new JSON-RPC 2.0 error with the appended message.

    • toJSONObject

      public JsonObject toJSONObject()
      Returns a JSON object representation of this JSON-RPC 2.0 error.
      Returns:
      A JSON object representing this error object.

    • toString

      public String toString()
      Serialises the error object to a JSON string.
      Overrides:
      toString in class Throwable
      Returns:
      A JSON-encoded string representing this error object.

    • equals

      public boolean equals(Object object)
      Overrides Object.equals().
      Overrides:
      equals in class Object
      Parameters:
      object - The object to compare to.
      Returns:
      true if both objects are instances if this class and their error codes are identical, false if not.

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object