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/******************************************************************************
*
* Copyright 2018 Stefan Majewsky <majewsky@gmx.net>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
package headers
//String is a helper type that provides type-safe access to a Swift header key
//whose value is a string. It cannot be directly constructed, but some subtypes
//of schwift.Headers have fields of this type. For example:
//
// var hdr AccountHeaders
// //the following two statements are equivalent:
// hdr.Set("X-Container-Read", ".r:*,.rlistings")
// hdr.ReadACL.Set(".r:*,.rlistings")
// //because hdr.ReadACL is a headers.String instance
type String struct {
Base
}
//Exists checks whether there is a value for this header.
func (f String) Exists() bool {
return f.H.Get(f.K) != ""
}
//Get returns the value for this header, or the empty string if there is no value.
func (f String) Get() string {
return f.H.Get(f.K)
}
//Set writes a new value for this header into the corresponding schwift.Headers
//instance.
func (f String) Set(value string) {
f.H.Set(f.K, value)
}
//Del removes this key from the original schwift.Headers instance, so that the
//key will remain unchanged on the server during Update().
func (f String) Del() {
f.H.Del(f.K)
}
//Clear sets this key to an empty string in the original schwift.Headers
//instance, so that the key will be removed on the server during Update().
func (f String) Clear() {
f.H.Clear(f.K)
}
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