120 lines
4.1 KiB
Go
120 lines
4.1 KiB
Go
package main
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import (
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"fmt"
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"io"
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)
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func (msg *MsgName) iterTop(w io.Writer) {
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var BASE string = msg.Name
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fmt.Fprintln(w, "type "+BASE+"Iterator struct {")
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fmt.Fprintln(w, " sync.RWMutex")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " things []*"+BASE)
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fmt.Fprintln(w, " index int")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// New"+BASE+"Iterator initializes a new iterator.")
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fmt.Fprintln(w, "func New"+BASE+"Iterator(things []*"+BASE+") *"+BASE+"Iterator {")
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fmt.Fprintln(w, " return &"+BASE+"Iterator{things: things}")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// Scan moves to the next element and returns false if there are no more things.")
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fmt.Fprintln(w, "// Use Scan() in a loop, similar to a while loop")
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fmt.Fprintln(w, "//")
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fmt.Fprintln(w, "// for iterator.Scan() ")
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fmt.Fprintln(w, "// d := iterator.Next(")
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fmt.Fprintln(w, "// fmt.Println(\"found UUID:\", d.Uuid")
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fmt.Fprintln(w, "// }")
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fmt.Fprintln(w, "func (it *"+BASE+"Iterator) Scan() bool {")
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fmt.Fprintln(w, " if it.index >= len(it.things) {")
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fmt.Fprintln(w, " return false")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " it.index++")
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fmt.Fprintln(w, " return true")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func (msg *MsgName) iterNext(w io.Writer) {
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var BASE string = msg.Name
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fmt.Fprintln(w, "// Next() returns the next thing in the array")
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fmt.Fprintln(w, "func (it *"+BASE+"Iterator) Next() *"+BASE+" {")
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fmt.Fprintln(w, " if it.things[it.index-1] == nil {")
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fmt.Fprintln(w, " for i, d := range it.things {")
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fmt.Fprintln(w, " fmt.Println(\"i =\", i, d)")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " return it.things[it.index-1]")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func (pf *File) selectAllFunc(w io.Writer) {
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var BASES string = pf.Bases.Name
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var BASE string = pf.Base.Name
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var LOCK string = pf.Bases.Lockname
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fmt.Fprintln(w, "func (x *"+BASES+") All() *"+BASE+"Iterator {")
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fmt.Fprintln(w, " "+BASE+"Pointers := x.selectAll"+BASE+"()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " iterator := New"+BASE+"Iterator("+BASE+"Pointers)")
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fmt.Fprintln(w, " return iterator")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "func (x *"+BASES+") Len() int {")
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fmt.Fprintln(w, " "+LOCK+".RLock()")
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fmt.Fprintln(w, " defer "+LOCK+".RUnlock()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " return len(x."+BASES+")")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func (pf *File) sortByFunc(w io.Writer) {
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var BASES string = pf.Bases.Name
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var BASE string = pf.Base.Name
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for _, SORT := range pf.Base.Sort {
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fmt.Fprintln(w, "func (x *"+BASES+") SortBy"+SORT+"() *"+BASE+"Iterator {")
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fmt.Fprintln(w, " things := x.selectAll"+BASE+"()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " sort.Sort("+BASE+""+SORT+"(things))")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " iterator := New"+BASE+"Iterator(things)")
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fmt.Fprintln(w, " return iterator")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "type "+BASE+""+SORT+" []*"+BASE+"")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "func (a "+BASE+""+SORT+") Len() int { return len(a) }")
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fmt.Fprintln(w, "func (a "+BASE+""+SORT+") Less(i, j int) bool { return a[i]."+SORT+" < a[j]."+SORT+" }")
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fmt.Fprintln(w, "func (a "+BASE+""+SORT+") Swap(i, j int) { a[i], a[j] = a[j], a[i] }")
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fmt.Fprintln(w, "")
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}
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}
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func (pf *File) iterSelect(w io.Writer) {
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var BASES string = pf.Bases.Name
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var BASE string = pf.Base.Name
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var LOCK string = pf.Bases.Lockname
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fmt.Fprintln(w, "// safely returns a slice of pointers to the "+BASE+" protobufs")
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fmt.Fprintln(w, "func (x *"+BASES+") selectAll"+BASE+"() []*"+BASE+" {")
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fmt.Fprintln(w, " "+LOCK+".RLock()")
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fmt.Fprintln(w, " defer "+LOCK+".RUnlock()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " // Create a new slice to hold pointers to each "+BASE+"")
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fmt.Fprintln(w, " var tmp []*"+BASE+"")
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fmt.Fprintln(w, " tmp = make([]*"+BASE+", len(x."+BASES+"))")
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fmt.Fprintln(w, " for i, p := range x."+BASES+" {")
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fmt.Fprintln(w, " tmp[i] = p // Copy pointers for safe iteration")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " return tmp")
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fmt.Fprintln(w, "}")
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}
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