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| 1 | +/*************************************************************************** |
| 2 | + qgsfieldvalidator.cpp - description |
| 3 | + ------------------- |
| 4 | + begin : March 2011 |
| 5 | + copyright : (C) 2011 by SunilRajKiran-kCube |
| 6 | + email : sunilraj.kiran@kcubeconsulting.com |
| 7 | +
|
| 8 | + adapted version of QValidator for QgsField |
| 9 | + ***************************************************************************/ |
| 10 | + |
| 11 | +/*************************************************************************** |
| 12 | + * * |
| 13 | + * This program is free software; you can redistribute it and/or modify * |
| 14 | + * it under the terms of the GNU General Public License as published by * |
| 15 | + * the Free Software Foundation; either version 2 of the License, or * |
| 16 | + * (at your option) any later version. * |
| 17 | + * * |
| 18 | + ***************************************************************************/ |
| 19 | +/* $Id$ */ |
| 20 | + |
| 21 | +#include "qgsfieldvalidator.h" |
| 22 | + |
| 23 | +#include <QValidator> |
| 24 | +#include <QRegExpValidator> |
| 25 | +#include <QDate> |
| 26 | +#include <QVariant> |
| 27 | +#include <QSettings> |
| 28 | + |
| 29 | +#include "qgslogger.h" |
| 30 | +#include "qgslonglongvalidator.h" |
| 31 | +#include "qgsfield.h" |
| 32 | + |
| 33 | +QgsFieldValidator::QgsFieldValidator( QObject *parent, const QgsField &field ) |
| 34 | + : QValidator( parent ) |
| 35 | + , mField( field ) |
| 36 | +{ |
| 37 | + switch ( mField.type() ) |
| 38 | + { |
| 39 | + case QVariant::Int: |
| 40 | + { |
| 41 | + if ( mField.length() > 0 ) |
| 42 | + { |
| 43 | + QString re = QString( "-?\\d{0,%1}" ).arg( mField.length() ); |
| 44 | + mValidator = new QRegExpValidator( QRegExp( re ), parent ); |
| 45 | + } |
| 46 | + else |
| 47 | + { |
| 48 | + mValidator = new QIntValidator( parent ); |
| 49 | + } |
| 50 | + } |
| 51 | + break; |
| 52 | + |
| 53 | + case QVariant::Double: |
| 54 | + { |
| 55 | + if ( mField.length() > 0 && mField.precision() > 0 ) |
| 56 | + { |
| 57 | + QString re = QString( "-?\\d{0,%1}(\\.\\d{0,%2})?" ).arg( mField.length() - mField.precision() ).arg( mField.precision() ); |
| 58 | + mValidator = new QRegExpValidator( QRegExp( re ), parent ); |
| 59 | + } |
| 60 | + else if ( mField.precision() > 0 ) |
| 61 | + { |
| 62 | + QString re = QString( "-?\\d*(\\.\\d{0,%1))?" ).arg( mField.precision() ); |
| 63 | + mValidator = new QRegExpValidator( QRegExp( re ), parent ); |
| 64 | + } |
| 65 | + else |
| 66 | + { |
| 67 | + mValidator = new QDoubleValidator( parent ); |
| 68 | + } |
| 69 | + } |
| 70 | + break; |
| 71 | + |
| 72 | + case QVariant::LongLong : |
| 73 | + mValidator = new QgsLongLongValidator( parent ); |
| 74 | + break; |
| 75 | + |
| 76 | + default: |
| 77 | + mValidator = 0; |
| 78 | + } |
| 79 | + |
| 80 | + QSettings settings; |
| 81 | + mNullValue = settings.value( "qgis/nullValue", "NULL" ).toString(); |
| 82 | +} |
| 83 | + |
| 84 | +QgsFieldValidator::~QgsFieldValidator() |
| 85 | +{ |
| 86 | + delete mValidator; |
| 87 | +} |
| 88 | + |
| 89 | +QValidator::State QgsFieldValidator::validate( QString &s, int &i ) const |
| 90 | +{ |
| 91 | + // empty values are considered NULL for numbers and dates and are acceptable |
| 92 | + if ( s.isEmpty() && |
| 93 | + ( mField.type() == QVariant::Double |
| 94 | + || mField.type() == QVariant::Int |
| 95 | + || mField.type() == QVariant::LongLong |
| 96 | + || mField.type() == QVariant::Date |
| 97 | + ) |
| 98 | + ) |
| 99 | + { |
| 100 | + return Acceptable; |
| 101 | + } |
| 102 | + |
| 103 | + // delegate to the child validator if any |
| 104 | + if ( mValidator ) |
| 105 | + { |
| 106 | + QValidator::State result = mValidator->validate( s, i ); |
| 107 | + return result; |
| 108 | + } |
| 109 | + else if ( mField.type() == QVariant::String ) |
| 110 | + { |
| 111 | + // allow to enter the NULL representation, which might be |
| 112 | + // longer than the actual field |
| 113 | + if ( mNullValue.size() > 0 && |
| 114 | + s.size() > 0 && |
| 115 | + s.size() < mNullValue.size() && |
| 116 | + s == mNullValue.left( s.size() ) ) |
| 117 | + return Intermediate; |
| 118 | + |
| 119 | + if ( s == mNullValue ) |
| 120 | + return Acceptable; |
| 121 | + |
| 122 | + if ( mField.length() > 0 && s.size() > mField.length() ) |
| 123 | + return Invalid; |
| 124 | + } |
| 125 | + else if ( mField.type() == QVariant::Date ) |
| 126 | + { |
| 127 | + return QDate::fromString( s ).isValid() ? Acceptable : Intermediate; |
| 128 | + } |
| 129 | + else |
| 130 | + { |
| 131 | + QgsDebugMsg( "unsupported type for validation" ); |
| 132 | + return Invalid; |
| 133 | + } |
| 134 | + |
| 135 | + return Acceptable; |
| 136 | +} |
| 137 | + |
| 138 | +void QgsFieldValidator::fixup( QString &s ) const |
| 139 | +{ |
| 140 | + if ( mValidator ) |
| 141 | + { |
| 142 | + mValidator->fixup( s ); |
| 143 | + } |
| 144 | + else if ( mField.type() == QVariant::String && mField.length() > 0 && s.size() > mField.length() ) |
| 145 | + { |
| 146 | + // if the value is longer, this must be a partial NULL representation |
| 147 | + s = mNullValue; |
| 148 | + } |
| 149 | + else if ( mField.type() == QVariant::Date ) |
| 150 | + { |
| 151 | + // invalid dates will also translate to NULL |
| 152 | + s = ""; |
| 153 | + } |
| 154 | +} |
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