github.com/rohankumardubey/aresdb@v0.0.2-0.20190517170215-e54e3ca06b9c/query/sql/util/util.go (about)

     1  //  Copyright (c) 2017-2018 Uber Technologies, Inc.
     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 util
    16  
    17  import (
    18  	"errors"
    19  	"strings"
    20  )
    21  
    22  // RequireNonNull validate a point is not null
    23  func RequireNonNull(pointer interface{}, errMsg string) {
    24  	if pointer == nil {
    25  		panic(errors.New(errMsg))
    26  	}
    27  }
    28  
    29  // GetSubstring returns substring embeded in a node's value (substring)
    30  func GetSubstring(str string) string {
    31  	front := strings.Index(str, "(")
    32  	return str[front+1 : len(str)-1]
    33  }
    34  
    35  // TrimQuote remove leading and tail quote
    36  func TrimQuote(str string) string {
    37  	if strings.HasPrefix(str, "\"") {
    38  		return strings.Trim(str, "\"")
    39  	} else if strings.HasPrefix(str, "'") {
    40  		return strings.Trim(str, "'")
    41  	}
    42  	return str
    43  }