1 // Copyright 2014 Google Inc. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package proptools 16 17 import ( 18 "reflect" 19 "strings" 20 "unicode" 21 "unicode/utf8" 22 ) 23 24 func PropertyNameForField(fieldName string) string { 25 r, size := utf8.DecodeRuneInString(fieldName) 26 propertyName := string(unicode.ToLower(r)) 27 if len(fieldName) > size { 28 propertyName += fieldName[size:] 29 } 30 return propertyName 31 } 32 33 func FieldNameForProperty(propertyName string) string { 34 r, size := utf8.DecodeRuneInString(propertyName) 35 fieldName := string(unicode.ToUpper(r)) 36 if len(propertyName) > size { 37 fieldName += propertyName[size:] 38 } 39 return fieldName 40 } 41 42 func HasTag(field reflect.StructField, name, value string) bool { 43 tag := field.Tag.Get(name) 44 for _, entry := range strings.Split(tag, ",") { 45 if entry == value { 46 return true 47 } 48 } 49 50 return false 51 } 52 53 // BoolPtr returns a pointer to a new bool containing the given value. 54 func BoolPtr(b bool) *bool { 55 return &b 56 } 57 58 // StringPtr returns a pointer to a new string containing the given value. 59 func StringPtr(s string) *string { 60 return &s 61 } 62 63 // Bool takes a pointer to a bool and returns true iff the pointer is non-nil and points to a true 64 // value. 65 func Bool(b *bool) bool { 66 if b != nil { 67 return *b 68 } 69 return false 70 } 71 72 // String takes a pointer to a string and returns the value of the string if the pointer is non-nil, 73 // or an empty string. 74 func String(s *string) string { 75 if s != nil { 76 return *s 77 } 78 return "" 79 } 80
