435 lines
8.8 KiB
C
435 lines
8.8 KiB
C
/***************************************************************************
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CTable.c
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The Table, Field and Index class
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(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#define __CTABLE_C
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#include <ctype.h>
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#include "main.h"
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#include "CField.h"
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#include "CIndex.h"
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#include "CTable.h"
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static GB_SUBCOLLECTION_DESC _fields_desc =
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{
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".TableFields",
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(void *)CFIELD_get,
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(void *)CFIELD_exist,
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(void *)CFIELD_list,
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(void *)CFIELD_release
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};
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static GB_SUBCOLLECTION_DESC _indexes_desc =
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{
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".TableIndexes",
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(void *)CINDEX_get,
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(void *)CINDEX_exist,
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(void *)CINDEX_list,
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(void *)CINDEX_release
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};
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static int valid_table(CTABLE *_object)
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{
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return !THIS->conn || !THIS->conn->db.handle;
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}
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static bool check_table(CCONNECTION *conn, char *name, bool must_exist)
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{
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bool exist = conn->driver->Table.Exist(&conn->db, name);
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if (must_exist)
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{
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if (!exist)
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{
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GB.Error("Unknown table: &1", name);
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return TRUE;
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}
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}
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else
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{
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if (exist)
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{
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GB.Error("Table already exists: &1", name);
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return TRUE;
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}
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}
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return FALSE;
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}
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static CTABLE *make_table(CCONNECTION *conn, const char *name, bool must_exist)
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{
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CTABLE *_object;
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if (check_table(conn, (char *)name, must_exist))
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return NULL;
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//fprintf(stderr, "make_table: '%s'\n", name);
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GB.New(POINTER(&_object), GB.FindClass("Table"), NULL, NULL);
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THIS->conn = conn;
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//GB.Ref(conn);
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THIS->driver = conn->driver;
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GB.NewString(&THIS->name, name, 0);
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//fprintf(stderr, "make_table: -> %p '%s'\n", THIS, THIS->name);
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return _object;
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}
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void *CTABLE_get(CCONNECTION *conn, const char *name)
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{
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return make_table(conn, name, TRUE);
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}
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int CTABLE_exist(CCONNECTION *conn, const char *name)
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{
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return conn->driver->Table.Exist(&conn->db, (char *)name);
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}
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void CTABLE_list(CCONNECTION *conn, char ***list)
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{
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conn->driver->Table.List(&conn->db, list);
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}
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void CTABLE_release(CCONNECTION *conn, void *_object)
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{
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THIS->conn = NULL;
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}
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/***************************************************************************
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Table
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***************************************************************************/
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static void free_new_fields(CTABLE *_object)
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{
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DB_FIELD *fp;
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DB_FIELD *next;
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for (fp = THIS->new_fields; fp; fp = next)
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{
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next = fp->next;
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CFIELD_free_info(fp);
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GB.Free(POINTER(&fp));
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}
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THIS->new_fields = NULL;
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}
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BEGIN_PROPERTY(CTABLE_primary_key)
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GB_ARRAY primary;
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int i, n;
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char *field;
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if (THIS->create)
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{
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if (READ_PROPERTY)
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{
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if (!THIS->primary)
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{
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GB.ReturnNull();
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return;
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}
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GB.ReturnObject(DB_StringArrayToGambasArray(THIS->primary));
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}
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else
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{
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primary = (GB_ARRAY)VPROP(GB_OBJECT);
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if (primary)
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n = GB.Array.Count(primary);
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else
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n = 0;
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for (i = 0; i < n; i++)
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{
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field = *((char **)GB.Array.Get(primary, i));
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if (!CFIELD_exist(THIS, field))
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{
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GB.Error("Unknown field: &1", field);
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return;
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}
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}
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DB_FreeStringArray(&THIS->primary);
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if (n)
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{
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GB.NewArray(&THIS->primary, sizeof(char *), n);
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for (i = 0; i < n; i++)
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GB.NewString(&THIS->primary[i], *((char **)GB.Array.Get(primary, i)), 0);
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}
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}
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}
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else
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{
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if (READ_PROPERTY)
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{
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if (THIS->driver->Table.PrimaryKey(&THIS->conn->db, THIS->name, &THIS->primary))
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return;
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GB.ReturnObject(DB_StringArrayToGambasArray(THIS->primary));
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DB_FreeStringArray(&THIS->primary);
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}
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else
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GB.Error("Read-only property");
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}
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END_PROPERTY
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BEGIN_PROPERTY(CTABLE_name)
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GB.ReturnString(THIS->name);
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END_PROPERTY
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BEGIN_PROPERTY(CTABLE_system)
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GB.ReturnBoolean(THIS->driver->Table.IsSystem(&THIS->conn->db, THIS->name));
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END_PROPERTY
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BEGIN_PROPERTY(CTABLE_type)
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if (THIS->create)
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{
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if (READ_PROPERTY)
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GB.ReturnString(THIS->type);
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else
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GB.StoreString(PROP(GB_STRING), &THIS->type);
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}
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else
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{
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if (READ_PROPERTY)
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GB.ReturnNewZeroString(THIS->driver->Table.Type(&THIS->conn->db, THIS->name, NULL));
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else
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THIS->driver->Table.Type(&THIS->conn->db, THIS->name, GB.ToZeroString(PROP(GB_STRING)));
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}
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END_PROPERTY
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BEGIN_METHOD_VOID(CTABLE_update)
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DB_FIELD *fp;
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DB_FIELD *fp_serial = NULL;
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if (!THIS->new_fields)
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{
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GB.Error("No field");
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return;
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}
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for (fp = THIS->new_fields; fp; fp = fp->next)
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{
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if (fp->type == DB_T_SERIAL)
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{
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if (THIS->conn->db.flags.no_serial)
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{
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GB.Error("Serial fields are not supported");
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return;
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}
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if (fp_serial)
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{
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GB.Error("Only one serial field is allowed");
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return;
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}
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fp_serial = fp;
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}
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else if (fp->type == DB_T_BLOB)
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{
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if (THIS->conn->db.flags.no_blob)
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{
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GB.Error("Blob fields are not supported");
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return;
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}
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}
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}
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if (fp_serial)
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{
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if (!(THIS->primary && GB.Count(THIS->primary) == 1 && strcmp(THIS->primary[0], fp_serial->name) == 0))
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{
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GB.Error("The serial field must be the primary key");
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return;
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}
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}
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/*if (!THIS->primary || GB.Count(THIS->primary) == 0)
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{
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GB.Error("No primary key");
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return;
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}*/
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if (THIS->driver->Table.Create(&THIS->conn->db, THIS->name, THIS->new_fields, THIS->primary, THIS->type))
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return;
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free_new_fields(THIS);
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DB_FreeStringArray(&THIS->primary);
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THIS->create = FALSE;
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//GB.Unref(THIS);
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END_METHOD
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BEGIN_METHOD_VOID(CTABLE_free)
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//fprintf(stderr, "CTABLE_free: %p '%s'\n", THIS, THIS->name);
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if (!valid_table(THIS))
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GB.SubCollection.Remove(THIS->conn->tables, THIS->name, 0);
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//GB.Unref(POINTER(&THIS->conn));
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GB.FreeString(&THIS->name);
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GB.FreeString(&THIS->type);
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DB_FreeStringArray(&THIS->primary);
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GB.Unref(POINTER(&THIS->fields));
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GB.Unref(POINTER(&THIS->indexes));
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free_new_fields(THIS);
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END_METHOD
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BEGIN_PROPERTY(CTABLE_fields)
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GB.SubCollection.New(&THIS->fields, &_fields_desc, THIS);
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GB.ReturnObject(THIS->fields);
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END_PROPERTY
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BEGIN_PROPERTY(CTABLE_indexes)
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GB.SubCollection.New(&THIS->indexes, &_indexes_desc, THIS);
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GB.ReturnObject(THIS->indexes);
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END_PROPERTY
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BEGIN_PROPERTY(CTABLE_connection)
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GB.ReturnObject(THIS->conn);
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END_PROPERTY
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GB_DESC CTableDesc[] =
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{
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GB_DECLARE("Table", sizeof(CTABLE)),
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GB_NOT_CREATABLE(),
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GB_HOOK_CHECK(valid_table),
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GB_METHOD("_free", NULL, CTABLE_free, NULL),
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//GB_METHOD("AddField", NULL, CTABLE_add_field, "(Name)s(Type)i[(Length)i(Default)v"])
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GB_PROPERTY_READ("Name", "s", CTABLE_name),
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GB_PROPERTY_READ("System", "b", CTABLE_system),
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GB_PROPERTY("PrimaryKey", "String[]", CTABLE_primary_key),
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GB_PROPERTY("Type", "s", CTABLE_type),
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GB_PROPERTY_READ("Connection", "Connection", CTABLE_connection),
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GB_METHOD("Update", NULL, CTABLE_update, NULL),
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GB_PROPERTY_READ("Fields", ".TableFields", CTABLE_fields),
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GB_PROPERTY_READ("Indexes", ".TableIndexes", CTABLE_indexes),
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GB_END_DECLARE
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};
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/***************************************************************************
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.ConnectionTables
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***************************************************************************/
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#undef THIS
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#define THIS ((GB_SUBCOLLECTION)_object)
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BEGIN_METHOD(CTABLE_add, GB_STRING name; GB_STRING type)
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CCONNECTION *conn = GB.SubCollection.Container(THIS);
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CTABLE *table;
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char *name = GB.ToZeroString(ARG(name));
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if (DB_CheckName(name, "table"))
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return;
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table = make_table(conn, name, FALSE);
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if (!table)
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return;
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GB.SubCollection.Add(THIS, STRING(name), LENGTH(name), table);
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if (!MISSING(type))
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GB.StoreString(ARG(type), &table->type);
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table->create = TRUE;
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GB.ReturnObject(table);
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END_METHOD
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BEGIN_METHOD(CTABLE_remove, GB_STRING name)
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CCONNECTION *conn = GB.SubCollection.Container(THIS);
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char *name = GB.ToZeroString(ARG(name));
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if (check_table(conn, name, TRUE))
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return;
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GB.SubCollection.Remove(THIS, STRING(name), LENGTH(name));
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conn->driver->Table.Delete(&conn->db, name);
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END_METHOD
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GB_DESC CConnectionTablesDesc[] =
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{
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GB_DECLARE(".ConnectionTables", 0), GB_INHERITS(".SubCollection"),
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GB_METHOD("Add", "Table", CTABLE_add, "(Name)s[(Type)s]"),
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GB_METHOD("Remove", NULL, CTABLE_remove, "(Name)s"),
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GB_END_DECLARE
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};
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