storage/aaLoadFlow.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent tw=79 ft=cpp: */
   3 /*
   4  * Copyright (C) 2007 Sergey Yanovich <ynvich@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <abstract/aacore.h>
  23
  24 #include "nsCOMPtr.h"
  25 #include "nsIMutableArray.h"
  26 #include "nsComponentManagerUtils.h"
  27 #include "nsStringAPI.h"
  28 #include "nsEmbedString.h"
  29
  30 /* Unfrozen API */
  31 #include "unstable/mozIStorageConnection.h"
  32 #include "unstable/mozIStorageStatement.h"
  33
  34 /* Project includes */
  35 #include <abstract/base/aaIEntity.h>
  36 #include <abstract/base/aaIResource.h>
  37 #include <abstract/base/aaIFlow.h>
  38 #include <abstract/storage/aaILoadQuery.h>
  39 #include "aaLoadFlow.h"
  40
  41 #define AA_LOADFLOW_SELECT_QUERY "SELECT flow.id, flow.tag, flow.entity_id,\
  42     entity.tag, giveR.id, giveR.tag, takeR.id, takeR.tag, flow.rate\
  43   FROM flow\
  44   LEFT JOIN entity ON flow.entity_id == entity.id\
  45   LEFT JOIN term AS giveT ON giveT.flow_id = flow.id AND giveT.side = 0\
  46   LEFT JOIN resource AS giveR ON giveR.id = giveT.resource_id\
  47   LEFT JOIN term AS takeT ON takeT.flow_id = flow.id AND takeT.side = 1\
  48   LEFT JOIN resource AS takeR ON takeR.id = takeT.resource_id"
  49 #define AA_FLOW_ITEM_CONTRACT "@aasii.org/base/flow;1"
  50
  51 aaLoadFlow::aaLoadFlow(nsISupports *aOuter)
  52   :aaLoadQuery(aOuter)
  53 {
  54 }
  55
  56 aaLoadFlow::~aaLoadFlow()
  57 {
  58 }
  59
  60 NS_IMPL_ISUPPORTS_INHERITED0(aaLoadFlow,
  61                              aaLoadQuery)
  62
  63 /* Virtual methods */
  64 const char*
  65 aaLoadFlow::getSelectQuery() const
  66 {
  67   return AA_LOADFLOW_SELECT_QUERY;
  68 }
  69
  70 aaIDataNode*
  71 aaLoadFlow::fetchRow()
  72 {
  73   nsresult rv;
  74   PRInt64 flowId, entityId, giveId, takeId;
  75   double rate;
  76   nsEmbedCString tag;
  77   rv = mStatement->GetInt64(0, &flowId);
  78   if (NS_FAILED(rv))
  79     return nsnull;
  80
  81   rv = mStatement->GetUTF8String(1, tag);
  82   if (NS_FAILED(rv))
  83     return nsnull;
  84
  85   rv = mStatement->GetInt64(2, &entityId);
  86   if (NS_FAILED(rv))
  87     return nsnull;
  88
  89   nsEmbedCString entityTag;
  90   rv = mStatement->GetUTF8String(3, entityTag);
  91   if (NS_FAILED(rv))
  92     return nsnull;
  93
  94   rv = mStatement->GetInt64(4, &giveId);
  95   if (NS_FAILED(rv))
  96     return nsnull;
  97
  98   nsEmbedCString giveTag;
  99   rv = mStatement->GetUTF8String(5, giveTag);
 100   if (NS_FAILED(rv))
 101     return nsnull;
 102
 103   rv = mStatement->GetInt64(6, &takeId);
 104   if (NS_FAILED(rv))
 105     return nsnull;
 106
 107   nsEmbedCString takeTag;
 108   rv = mStatement->GetUTF8String(7, takeTag);
 109   if (NS_FAILED(rv))
 110     return nsnull;
 111
 112   rv = mStatement->GetDouble(8, &rate);
 113   if (NS_FAILED(rv))
 114     return nsnull;
 115
 116   nsCOMPtr<aaIEntity> entity(do_CreateInstance("@aasii.org/base/entity;1"));
 117   if (! entity)
 118     return nsnull;
 119
 120   rv = entity->SetId(entityId);
 121   if (NS_FAILED(rv))
 122     return nsnull;
 123
 124   rv = entity->SetTag(NS_ConvertUTF8toUTF16(entityTag));
 125   if (NS_FAILED(rv))
 126     return nsnull;
 127
 128   nsCOMPtr<aaIResource> give(do_CreateInstance("@aasii.org/base/resource;1"));
 129   if (! give)
 130     return nsnull;
 131
 132   rv = give->SetId(giveId);
 133   if (NS_FAILED(rv))
 134     return nsnull;
 135
 136   rv = give->SetTag(NS_ConvertUTF8toUTF16(giveTag));
 137   if (NS_FAILED(rv))
 138     return nsnull;
 139
 140   nsCOMPtr<aaIResource> take(do_CreateInstance("@aasii.org/base/resource;1"));
 141   if (! take)
 142     return nsnull;
 143
 144   rv = take->SetId(takeId);
 145   if (NS_FAILED(rv))
 146     return nsnull;
 147
 148   rv = take->SetTag(NS_ConvertUTF8toUTF16(takeTag));
 149   if (NS_FAILED(rv))
 150     return nsnull;
 151
 152   aaIFlow* flow;
 153   CallCreateInstance("@aasii.org/base/flow;1", nsnull, &flow);
 154   if (! flow)
 155     return nsnull;
 156
 157   flow->SetId(flowId);
 158   flow->SetTag(NS_ConvertUTF8toUTF16(tag));
 159   flow->SetEntity(entity);
 160   flow->SetGiveResource(give);
 161   flow->SetTakeResource(take);
 162   flow->SetRate(rate);
 163
 164   return flow;
 165 }
 166