commit 100034b76429677f919eea98bc74eb17c392f979
Author: Christian Ehringfeld <c.ehringfeld@t-online.de>
Date:   Wed Jul 29 22:12:41 2015 +0200

    logger

diff --git a/EntityManager.pro b/EntityManager.pro
index 2002e06..572c4c7 100644
--- a/EntityManager.pro
+++ b/EntityManager.pro
@@ -24,7 +24,8 @@ src/entity.h \
     src/entityinstancefactory.h \
     src/condition.h \
     src/cache.h \
-    src/entityhelper.h
+    src/entityhelper.h \
+    src/logger.h
 
 SOURCES += \
 src/entity.cpp \
@@ -42,7 +43,8 @@ src/entity.cpp \
     src/entityinstancefactory.cpp \
     src/condition.cpp \
     src/cache.cpp \
-    src/entityhelper.cpp
+    src/entityhelper.cpp \
+    src/logger.cpp
 
 unix {
     target.path = /usr/lib
@@ -50,5 +52,6 @@ unix {
     QMAKE_CXXFLAGS += -Wall -Wextra -Wmaybe-uninitialized -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override -Wunsafe-loop-optimizations -pedantic -Wfloat-equal -Wundef -Wpointer-arith -Wcast-align -Wunreachable-code -O
 }
 CONFIG += c++14
+QMAKE_CXXFLAGS += -std=c++14
 #QMAKE_CXXFLAGS +=  -Winit-self
 CONFIG(release, debug|release):DEFINES += QT_NO_DEBUG_OUTPUT
diff --git a/samples/example/Example.pro b/samples/example/Example.pro
index bd31833..8239cf6 100644
--- a/samples/example/Example.pro
+++ b/samples/example/Example.pro
@@ -30,6 +30,7 @@ else:unix:!macx:CONFIG(release, release|debug): LIBS += -L$$PWD/../../../build-E
 unix:INCLUDEPATH += $$PWD/../../src
 unix:DEPENDPATH += $$PWD/../../src
 CONFIG += c++14
+QMAKE_CXXFLAGS += -std=c++14
 
 win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../build-EntityManager-Desktop-Release/release/ -lCuteEntityManager
 else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../build-EntityManager-Desktop-Debug/debug/ -lCuteEntityManager
@@ -37,6 +38,9 @@ else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../build-EntityManag
 win32:INCLUDEPATH += $$PWD/../../build-EntityManager-Desktop-Debug/debug
 win32:DEPENDPATH += $$PWD/../../build-EntityManager-Desktop-Debug/debug
 
+INCLUDEPATH += $$PWD/../../src
+DEPENDPATH += $$PWD/../../src
+
 unix {
 QMAKE_CXXFLAGS += -Wall -Wextra -Wmaybe-uninitialized -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override -Wunsafe-loop-optimizations -pedantic -Wfloat-equal -Wundef -Wpointer-arith -Wcast-align -Wunreachable-code -O -Winit-self
 }
diff --git a/src/logger.cpp b/src/logger.cpp
new file mode 100644
index 0000000..538ee80
--- /dev/null
+++ b/src/logger.cpp
@@ -0,0 +1,65 @@
+#include "logger.h"
+#include <QDir>
+#include <QDebug>
+#include <QTextStream>
+#include <QDateTime>
+
+Logger::Logger(QString path) {
+    this->path = path;
+}
+
+Logger::~Logger() {
+}
+
+QString Logger::defaultPath() const {
+    return QDir::currentPath() + "/errors.log";
+}
+
+void Logger::lastError(const QSqlQuery &q) {
+    QFile log(this->getPath());
+    log.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Append);
+    log.seek(log.size());
+    QTextStream stream(&log);
+    qDebug() << this->generateLogMsg(q.lastError());
+    qDebug() << generateLogMsg(q);
+    stream << this->generateLogMsg(q.lastError());
+    stream << generateLogMsg(q);
+    log.close();
+}
+
+void Logger::lastError(const QSqlError &e) {
+    if(e.isValid()) {
+        QFile log(this->getPath());
+        log.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Append);
+        log.seek(log.size());
+        QTextStream stream(&log);
+        qDebug() << this->generateLogMsg(e);
+        stream << this->generateLogMsg(e);
+        log.close();
+    }
+}
+
+QString Logger::generateLogMsg(const QSqlQuery &q) const {
+    QString r = "Query:<" + q.executedQuery() + ">";
+    QMap<QString, QVariant> m = q.boundValues();
+    QMap<QString,QVariant>::iterator i;
+    for (i = m.begin(); i != m.end(); ++i) {
+        r += "\n<" + i.key() + "|" + i.value().toString() + ">";
+    }
+    return r;
+}
+
+QString Logger::getPath() {
+    if(this->path.isEmpty()) {
+        this->path = this->defaultPath();
+    }
+    return path;
+}
+
+void Logger::setPath(const QString &value) {
+    path = value;
+}
+
+QString Logger::generateLogMsg(const QSqlError &e) const {
+    return "UTC:" + QDateTime::currentDateTime().toString("yyyy-MM-dd|hh:MM:ss") + "|" + e.driverText() + "|" + e.databaseText().toLatin1() + "\n";
+}
diff --git a/src/logger.h b/src/logger.h
new file mode 100644
index 0000000..1f33606
--- /dev/null
+++ b/src/logger.h
@@ -0,0 +1,29 @@
+#ifndef LOGGER_H
+#define LOGGER_H
+
+#include <QString>
+#include <QFile>
+#include <QSqlError>
+#include <QSqlQuery>
+
+class Logger
+{
+public:
+    Logger(QString path="");
+    virtual ~Logger();
+    QString defaultPath() const;
+
+    void lastError(const QSqlError &e);
+    void lastError(const QSqlQuery &q);
+    QString getPath();
+    void setPath(const QString &value);
+
+protected:
+    QString generateLogMsg(const QSqlError &e) const;
+    QString generateLogMsg(const QSqlQuery &q) const;
+
+private:
+    QString path;
+};
+
+#endif // LOGGER_H