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added comments to builder pattern

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This commit is contained in:
ismayilmalik 2019-03-17 11:27:03 +03:00
parent 5412783f26
commit 128db9aef2
1 changed files with 7 additions and 0 deletions
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7
creational/builder/builder.go
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@ -1,5 +1,6 @@
package builder package builder
// Product to build
type PersonalComputer struct { type PersonalComputer struct {
ramCap int ramCap int
hddCap int hddCap int
@ -8,6 +9,7 @@ type PersonalComputer struct {
gpu string gpu string
} }
// Each builder should implement this interface
type PCBuilder interface { type PCBuilder interface {
SetRAM() PCBuilder SetRAM() PCBuilder
SetHDD() PCBuilder SetHDD() PCBuilder
@ -22,6 +24,11 @@ type HomeEditionPCBuilder struct {
pc PersonalComputer pc PersonalComputer
} }
// You may ask "Wait? we can set those values on struct initialization.Why
// brand new pattern for it?" and you are right. But remember this is just a
// concise implementation for with informational intend. In reality your
// construction methods will be more sophisticated, so struct initialization
// will not help.
func (b *HomeEditionPCBuilder) SetRAM() PCBuilder { func (b *HomeEditionPCBuilder) SetRAM() PCBuilder {
b.pc.ramCap = 4 b.pc.ramCap = 4
return b return b