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More use of implicit sharing of QgsExpression

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This commit is contained in:
Matthias Kuhn 2015-12-16 23:16:49 +01:00
parent efaae1f609
commit b9f0c0625a
4 changed files with 13 additions and 7 deletions
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1
src/core/qgsexpressionfieldbuffer.cpp
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@ -36,6 +36,7 @@ void QgsExpressionFieldBuffer::removeExpression( int index )
void QgsExpressionFieldBuffer::updateExpression( int index, const QString& exp )
{
mExpressions[index].expression = exp;
mExpressions[index].cachedExpression = QgsExpression( exp );
}
void QgsExpressionFieldBuffer::writeXml( QDomNode& layerNode, QDomDocument& document ) const

9
src/core/qgsexpressionfieldbuffer.h
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@ -23,6 +23,7 @@
#include <QDomNode>
#include "qgsfield.h"
#include "qgsexpression.h"
/**
* Buffers information about expression fields for a vector layer.
@ -34,10 +35,14 @@ class CORE_EXPORT QgsExpressionFieldBuffer
public:
typedef struct ExpressionField
{
ExpressionField() {}
ExpressionField( const QString& exp, const QgsField& fld ) : expression( exp ), field( fld ) {}
ExpressionField() : cachedExpression( expression ) {}
ExpressionField( const QString& exp, const QgsField& fld ) : expression( exp ), cachedExpression( exp ), field( fld ) {}
/**
* @deprecated use cachedExpression instead
*/
QString expression;
QgsExpression cachedExpression;
QgsField field;
} ExpressionField;

2
src/core/qgsvectorlayerfeatureiterator.cpp
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@ -530,7 +530,7 @@ void QgsVectorLayerFeatureIterator::prepareExpressions()
|| mRequest.subsetOfAttributes().contains( i ) )
{
int oi = mSource->mFields.fieldOriginIndex( i );
QgsExpression* exp = new QgsExpression( exps[oi].expression );
QgsExpression* exp = new QgsExpression( exps[oi].cachedExpression );
exp->prepare( mExpressionContext.data() );
mExpressionFieldInfo.insert( i, exp );

8
tests/src/python/test_qgsvectorlayer.py
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@ -965,16 +965,16 @@ class TestQgsVectorLayer(TestCase):
idx = layer.addExpressionField('5', QgsField('test', QVariant.LongLong))
assert(layer.getFeatures().next()[idx] == 5)
assert(layer.pendingFields().count() == cnt + 1)
self.assertEquals(layer.getFeatures().next()[idx], 5)
self.assertEquals(layer.pendingFields().count(), cnt + 1)
layer.updateExpressionField(idx, '9')
assert(layer.getFeatures().next()[idx] == 9)
self.assertEquals(layer.getFeatures().next()[idx], 9)
layer.removeExpressionField(idx)
assert(layer.pendingFields().count() == cnt)
self.assertEquals(layer.pendingFields().count(), cnt)
def test_ExpressionFilter(self):
layer = createLayerWithOnePoint()