#!/usr/bin/env python

from pvaccess import Channel

print '****************************'
print 'Testing union'
c = Channel('exampleRegularUnion')
pv = c.get()
print "original value",pv
isVariant = pv.isUnionVariant()
if isVariant==True :
    print channelName,"is not a regular union"
    exit
print "union introspection: "
print pv.getStructureDict()

names = pv.getUnionFieldNames()
print "union fieldNames",names
value = pv.selectUnionField(names[0])
value.setString("new value")
value = pv.getUnion()
print "putting",pv
c.put(pv)
pv = c.get()
print "received",pv
print "value:",pv.get()
value = pv.selectUnionField(names[1])
print 'selected field: ', pv.getSelectedUnionFieldName()
value.setScalarArray(["aaaa","bbbbb","ccccc"])
print "putting",pv
c.put(pv)
pv = c.get()
print "received",pv
print "value:",pv.get()
print "class:",pv.__class__.__name__
print 'selected field: ', pv.getSelectedUnionFieldName()

# This should fail
value.setInt(6)
print "putting",pv
c.put(pv)
pv = c.get()
print "received",pv