--- /dev/null
+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name: conditions.cl
+;;;; Purpose: Error conditions for high-level SQL interface
+;;;; Programmers: Kevin M. Rosenberg based on
+;;;; Original code by Pierre R. Mai
+;;;; Date Started: Feb 2002
+;;;;
+;;;; $Id: conditions.lisp,v 1.1 2002/09/30 10:19:01 kevin Exp $
+;;;;
+;;;; This file, part of CLSQL, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
+;;;;
+;;;; CLSQL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
+;;;; *************************************************************************
+
+(declaim (optimize (debug 3) (speed 3) (safety 1) (compilation-speed 0)))
+(in-package :clsql-base-sys)
+
+;;; Conditions
+(define-condition clsql-condition ()
+ ())
+
+(define-condition clsql-error (error clsql-condition)
+ ())
+
+(define-condition clsql-simple-error (simple-condition clsql-error)
+ ())
+
+(define-condition clsql-warning (warning clsql-condition)
+ ())
+
+(define-condition clsql-simple-warning (simple-condition clsql-warning)
+ ())
+
+(define-condition clsql-invalid-spec-error (clsql-error)
+ ((connection-spec :initarg :connection-spec
+ :reader clsql-invalid-spec-error-connection-spec)
+ (database-type :initarg :database-type
+ :reader clsql-invalid-spec-error-database-type)
+ (template :initarg :template
+ :reader clsql-invalid-spec-error-template))
+ (:report (lambda (c stream)
+ (format stream "The connection specification ~A~%is invalid for database type ~A.~%The connection specification must conform to ~A"
+ (clsql-invalid-spec-error-connection-spec c)
+ (clsql-invalid-spec-error-database-type c)
+ (clsql-invalid-spec-error-template c)))))
+
+(defmacro check-connection-spec (connection-spec database-type template)
+ "Check the connection specification against the provided template,
+and signal an clsql-invalid-spec-error if they don't match."
+ `(handler-case
+ (destructuring-bind ,template ,connection-spec
+ (declare (ignore ,@template))
+ t)
+ (error () (error 'clsql-invalid-spec-error
+ :connection-spec ,connection-spec
+ :database-type ,database-type
+ :template (quote ,template)))))
+
+(define-condition clsql-connect-error (clsql-error)
+ ((database-type :initarg :database-type
+ :reader clsql-connect-error-database-type)
+ (connection-spec :initarg :connection-spec
+ :reader clsql-connect-error-connection-spec)
+ (errno :initarg :errno :reader clsql-connect-error-errno)
+ (error :initarg :error :reader clsql-connect-error-error))
+ (:report (lambda (c stream)
+ (format stream "While trying to connect to database ~A~% using database-type ~A:~% Error ~D / ~A~% has occurred."
+ (database-name-from-spec
+ (clsql-connect-error-connection-spec c)
+ (clsql-connect-error-database-type c))
+ (clsql-connect-error-database-type c)
+ (clsql-connect-error-errno c)
+ (clsql-connect-error-error c)))))
+
+(define-condition clsql-sql-error (clsql-error)
+ ((database :initarg :database :reader clsql-sql-error-database)
+ (expression :initarg :expression :reader clsql-sql-error-expression)
+ (errno :initarg :errno :reader clsql-sql-error-errno)
+ (error :initarg :error :reader clsql-sql-error-error))
+ (:report (lambda (c stream)
+ (format stream "While accessing database ~A~% with expression ~S:~% Error ~D / ~A~% has occurred."
+ (clsql-sql-error-database c)
+ (clsql-sql-error-expression c)
+ (clsql-sql-error-errno c)
+ (clsql-sql-error-error c)))))
+
+(define-condition clsql-database-warning (clsql-warning)
+ ((database :initarg :database :reader clsql-database-warning-database)
+ (message :initarg :message :reader clsql-database-warning-message))
+ (:report (lambda (c stream)
+ (format stream "While accessing database ~A~% Warning: ~A~% has occurred."
+ (clsql-database-warning-database c)
+ (clsql-database-warning-message c)))))
+
+(define-condition clsql-exists-condition (clsql-condition)
+ ((old-db :initarg :old-db :reader clsql-exists-condition-old-db)
+ (new-db :initarg :new-db :reader clsql-exists-condition-new-db
+ :initform nil))
+ (:report (lambda (c stream)
+ (format stream "In call to ~S:~%" 'connect)
+ (cond
+ ((null (clsql-exists-condition-new-db c))
+ (format stream
+ " There is an existing connection ~A to database ~A."
+ (clsql-exists-condition-old-db c)
+ (database-name (clsql-exists-condition-old-db c))))
+ ((eq (clsql-exists-condition-new-db c)
+ (clsql-exists-condition-old-db c))
+ (format stream
+ " Using existing connection ~A to database ~A."
+ (clsql-exists-condition-old-db c)
+ (database-name (clsql-exists-condition-old-db c))))
+ (t
+ (format stream
+ " Created new connection ~A to database ~A~%, although there is an existing connection (~A)."
+ (clsql-exists-condition-new-db c)
+ (database-name (clsql-exists-condition-new-db c))
+ (clsql-exists-condition-old-db c)))))))
+
+(define-condition clsql-exists-warning (clsql-exists-condition
+ clsql-warning)
+ ())
+
+(define-condition clsql-exists-error (clsql-exists-condition
+ clsql-error)
+ ())
+
+(define-condition clsql-closed-error (clsql-error)
+ ((database :initarg :database :reader clsql-closed-error-database))
+ (:report (lambda (c stream)
+ (format stream "The database ~A has already been closed."
+ (clsql-closed-error-database c)))))
+
+(define-condition clsql-nodb-error (clsql-error)
+ ((database :initarg :database :reader clsql-nodb-error-database))
+ (:report (lambda (c stream)
+ (format stream "No such database ~S is open."
+ (clsql-nodb-error-database c)))))
+
+
+;; Signal conditions
+
+
+(defun signal-closed-database-error (database)
+ (cerror "Ignore this error and return nil."
+ 'clsql-closed-error
+ :database database))
+
+(defun signal-nodb-error (database)
+ (cerror "Ignore this error and return nil."
+ 'clsql-nodb-error
+ :database database))
+
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