File indexing completed on 2022-11-23 11:08:56

0001 /* This file is part of the KDE project
0002    Copyright (C) 2003-2011 Jarosław Staniek <staniek@kde.org>
0003 
0004    This library is free software; you can redistribute it and/or
0005    modify it under the terms of the GNU Library General Public
0006    License as published by the Free Software Foundation; either
0007    version 2 of the License, or (at your option) any later version.
0008 
0009    This library is distributed in the hope that it will be useful,
0010    but WITHOUT ANY WARRANTY; without even the implied warranty of
0011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0012    Library General Public License for more details.
0013 
0014    You should have received a copy of the GNU Library General Public License
0015    along with this library; see the file COPYING.LIB.  If not, write to
0016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0017  * Boston, MA 02110-1301, USA.
0018 */
0019 
0020 #include "KDbRecordEditBuffer.h"
0021 #include "KDb.h"
0022 #include "KDbQueryColumnInfo.h"
0023 #include "kdb_debug.h"
0024 
0025 KDbRecordEditBuffer::KDbRecordEditBuffer(bool dbAwareBuffer)
0026         : m_simpleBuffer(dbAwareBuffer ? nullptr : new SimpleMap())
0027         , m_simpleBufferIt(dbAwareBuffer ? nullptr : new SimpleMap::ConstIterator())
0028         , m_dbBuffer(dbAwareBuffer ? new DbHash() : nullptr)
0029         , m_dbBufferIt(dbAwareBuffer ? new DbHash::Iterator() : nullptr)
0030         , m_defaultValuesDbBuffer(dbAwareBuffer ? new QMap<KDbQueryColumnInfo*, bool>() : nullptr)
0031         , m_defaultValuesDbBufferIt(dbAwareBuffer ? new QMap<KDbQueryColumnInfo*, bool>::ConstIterator() : nullptr)
0032 {
0033 }
0034 
0035 KDbRecordEditBuffer::~KDbRecordEditBuffer()
0036 {
0037     delete m_simpleBuffer;
0038     delete m_simpleBufferIt;
0039     delete m_dbBuffer;
0040     delete m_dbBufferIt;
0041     delete m_defaultValuesDbBuffer;
0042     delete m_defaultValuesDbBufferIt;
0043 }
0044 
0045 bool KDbRecordEditBuffer::isDBAware() const
0046 {
0047     return m_dbBuffer != nullptr;
0048 }
0049 
0050 const QVariant* KDbRecordEditBuffer::at(KDbQueryColumnInfo* ci, bool useDefaultValueIfPossible) const
0051 {
0052     if (!ci) {
0053         kdbWarning() << "no KDbQueryColumnInfo provided";
0054         return nullptr;
0055     }
0056     if (!m_dbBuffer) {
0057         kdbWarning() << "not db-aware buffer!";
0058         return nullptr;
0059     }
0060     *m_dbBufferIt = m_dbBuffer->find(ci);
0061     QVariant* result = nullptr;
0062     if (*m_dbBufferIt != m_dbBuffer->end())
0063         result = &(*m_dbBufferIt).value();
0064     if (useDefaultValueIfPossible
0065             && (!result || result->isNull())
0066             && ci->field() && !ci->field()->defaultValue().isNull() && KDb::isDefaultValueAllowed(*ci->field())
0067             && !hasDefaultValueAt(*ci)) {
0068         //no buffered or stored value: try to get a default value declared in a field, so user can modify it
0069         if (!result)
0070             m_dbBuffer->insert(ci, ci->field()->defaultValue());
0071         result = &(*m_dbBuffer)[ ci ];
0072         m_defaultValuesDbBuffer->insert(ci, true);
0073     }
0074     return (const QVariant*)result;
0075 }
0076 
0077 const QVariant* KDbRecordEditBuffer::at(const KDbField &field) const
0078 {
0079     if (!m_simpleBuffer) {
0080         kdbWarning() << "this is db-aware buffer!";
0081         return nullptr;
0082     }
0083     *m_simpleBufferIt = m_simpleBuffer->constFind(field.name());
0084     if (*m_simpleBufferIt == m_simpleBuffer->constEnd()) {
0085         //kdbWarning() << "no such field:" << field;
0086         return nullptr;
0087     }
0088     return &(*m_simpleBufferIt).value();
0089 }
0090 
0091 const QVariant* KDbRecordEditBuffer::at(const QString& fname) const
0092 {
0093     if (!m_simpleBuffer) {
0094         kdbWarning() << "this is db-aware buffer!";
0095         return nullptr;
0096     }
0097     *m_simpleBufferIt = m_simpleBuffer->constFind(fname);
0098     if (*m_simpleBufferIt == m_simpleBuffer->constEnd()) {
0099         //kdbWarning() << "no such field:" << fname;
0100         return nullptr;
0101     }
0102     return &(*m_simpleBufferIt).value();
0103 }
0104 
0105 void KDbRecordEditBuffer::removeAt(const KDbQueryColumnInfo& ci)
0106 {
0107     if (!m_dbBuffer) {
0108         kdbWarning() << "not db-aware buffer!";
0109         return;
0110     }
0111     m_dbBuffer->remove(const_cast<KDbQueryColumnInfo*>(&ci)); // const_cast ok here, we won't modify ci
0112 }
0113 
0114 void KDbRecordEditBuffer::removeAt(const KDbField& field)
0115 {
0116     if (!m_simpleBuffer) {
0117         kdbWarning() << "this is db-aware buffer!";
0118         return;
0119     }
0120     m_simpleBuffer->remove(field.name());
0121 }
0122 
0123 void KDbRecordEditBuffer::removeAt(const QString& fname)
0124 {
0125     if (!m_simpleBuffer) {
0126         kdbWarning() << "this is db-aware buffer!";
0127         return;
0128     }
0129     m_simpleBuffer->remove(fname);
0130 }
0131 
0132 void KDbRecordEditBuffer::clear()
0133 {
0134     if (m_dbBuffer) {
0135         m_dbBuffer->clear();
0136         m_defaultValuesDbBuffer->clear();
0137     }
0138     if (m_simpleBuffer)
0139         m_simpleBuffer->clear();
0140 }
0141 
0142 bool KDbRecordEditBuffer::isEmpty() const
0143 {
0144     if (m_dbBuffer)
0145         return m_dbBuffer->isEmpty();
0146     if (m_simpleBuffer)
0147         return m_simpleBuffer->isEmpty();
0148     return true;
0149 }
0150 
0151 void KDbRecordEditBuffer::insert(KDbQueryColumnInfo *ci, const QVariant &val)
0152 {
0153     if (ci && m_dbBuffer) {
0154         m_dbBuffer->insert(ci, val);
0155         m_defaultValuesDbBuffer->remove(ci);
0156     }
0157 }
0158 
0159 void KDbRecordEditBuffer::insert(const QString &fname, const QVariant &val)
0160 {
0161     if (m_simpleBuffer) {
0162         m_simpleBuffer->insert(fname, val);
0163     }
0164 }
0165 
0166 bool KDbRecordEditBuffer::hasDefaultValueAt(const KDbQueryColumnInfo &ci) const
0167 {
0168     return m_defaultValuesDbBuffer->value(const_cast<KDbQueryColumnInfo*>(&ci), false);
0169 }
0170 
0171 KDbRecordEditBuffer::SimpleMap KDbRecordEditBuffer::simpleBuffer() const
0172 {
0173     return *m_simpleBuffer;
0174 }
0175 
0176 KDbRecordEditBuffer::DbHash KDbRecordEditBuffer::dbBuffer() const
0177 {
0178     return *m_dbBuffer;
0179 }
0180 
0181 KDB_EXPORT QDebug operator<<(QDebug dbg, const KDbRecordEditBuffer& buffer)
0182 {
0183     if (buffer.isDBAware()) {
0184         const KDbRecordEditBuffer::DbHash buf(buffer.dbBuffer());
0185         dbg.space() << "RecordEditBuffer type=DB-AWARE," << buf.count() << "field(s):\n";
0186         for (KDbRecordEditBuffer::DbHash::ConstIterator it = buf.constBegin();
0187              it != buf.constEnd(); ++it)
0188         {
0189             dbg.nospace() << "* field name=" << qPrintable(it.key()->field()->name()) << " val="
0190             << (it.value().isNull() ? QLatin1String("<NULL>") : it.value().toString())
0191             << (buffer.hasDefaultValueAt(*it.key()) ? " DEFAULT\n" : "\n");
0192         }
0193         return dbg.space();
0194     }
0195     const KDbRecordEditBuffer::SimpleMap map(buffer.simpleBuffer());
0196     dbg.space() << "RecordEditBuffer type=SIMPLE," << map.count() << "field(s):\n";
0197     for (KDbRecordEditBuffer::SimpleMap::ConstIterator it = map.constBegin();
0198          it != map.constEnd(); ++it)
0199     {
0200         dbg.nospace() << "* field name=" << qPrintable(it.key()) << " val="
0201         << (it.value().isNull() ? QLatin1String("<NULL>") : it.value().toString()) << "\n";
0202     }
0203     return dbg.space();
0204 }