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linker.go
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linker.go
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package linker
import (
"fmt"
"github.com/TIBCOSoftware/flogo-lib/logger"
"github.com/TIBCOSoftware/flogo-contrib/action/flow/definition"
"github.com/TIBCOSoftware/flogo-lib/core/data"
"github.com/TIBCOSoftware/flogo-lib/core/mapper/exprmapper"
)
var log = logger.GetLogger("linker")
type linkerManager struct {
}
type linkerFactory struct {
}
func NewDefaultLinkerFactory() definition.LinkExprManagerFactory {
return &linkerFactory{}
}
func (factory *linkerFactory) NewLinkExprManager() definition.LinkExprManager {
return &linkerManager{}
}
func (em *linkerManager) EvalLinkExpr(link *definition.Link, scope data.Scope) (bool, error) {
value := link.Value()
if value == "" {
return true, nil
}
log.Debugf("WI link expression value [%s]", value)
funcValue, err := exprmapper.GetMappingValue(value, scope, definition.GetDataResolver())
if err != nil {
log.Error("Get value from link value %+v, error %s", value, err.Error())
return false, fmt.Errorf("Get value from link value %+v, error %s", value, err.Error())
}
b, err := data.CoerceToBoolean(funcValue)
if err != nil {
log.Error("Parser [%+v] to boolean error [%s]", value, err.Error())
return false, fmt.Errorf("Parser [%+v] to boolean error [%s]", value, err.Error())
}
log.Debugf("Linking %s result %b", link.Value(), b)
return b, nil
}