func (b *Builder) conditionOrProperty(data Property) interface{} {
parse := func(expr string, required bool) walk.Condition {
var negated bool
if strings.HasPrefix(expr, "!") {
negated = true
expr = strings.TrimSpace(expr[1:])
}
var condition walk.Condition
if p := b.property(expr); p != nil {
condition = p.(walk.Condition)
} else if c, ok := conditionsByName[expr]; ok {
condition = c
} else if required {
panic("unknown condition or property name: " + expr)
}
if negated {
condition = walk.NewNegatedCondition(condition)
}
return condition
}
switch val := data.(type) {
case bindData:
if c, ok := b.knownCompositeConditions[val.expression]; ok {
return c
} else if conds := strings.Split(val.expression, "&&"); len(conds) > 1 {
// This looks like a composite condition.
for i, s := range conds {
conds[i] = strings.TrimSpace(s)
}
var conditions []walk.Condition
for _, cond := range conds {
conditions = append(conditions, parse(cond, true))
}
var condition walk.Condition
if len(conditions) > 1 {
condition = walk.NewAllCondition(conditions...)
b.knownCompositeConditions[val.expression] = condition
} else {
condition = conditions[0]
}
return condition
}
return parse(val.expression, false)
case walk.Condition:
return val
}
return nil
}
func (b *Builder) conditionOrProperty(data Property) interface{} {
switch val := data.(type) {
case bindData:
if c, ok := b.knownCompositeConditions[val.expression]; ok {
return c
} else if conds := strings.Split(val.expression, "&&"); len(conds) > 1 {
// This looks like a composite condition.
for i, s := range conds {
conds[i] = strings.TrimSpace(s)
}
var conditions []walk.Condition
for _, cond := range conds {
if p := b.property(cond); p != nil {
conditions = append(conditions, p.(walk.Condition))
} else if c, ok := conditionsByName[cond]; ok {
conditions = append(conditions, c)
} else {
panic("unknown condition or property name: " + cond)
}
}
var condition walk.Condition
if len(conditions) > 1 {
condition = walk.NewAllCondition(conditions...)
b.knownCompositeConditions[val.expression] = condition
} else {
condition = conditions[0]
}
return condition
}
if p := b.property(val.expression); p != nil {
return p
}
return conditionsByName[val.expression]
case walk.Condition:
return val
}
return nil
}