1 files changed, 64 insertions, 0 deletions
diff --git a/field_string.go b/field_string.go
new file mode 100644
index 0000000..d44d517
--- /dev/null
+++ b/field_string.go
@@ -0,0 +1,64 @@
+/******************************************************************************
+*
+*  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 schwift
+
+//FieldString 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 methods on
+//the Headers types return this type. For example:
+//
+//    hdr := make(AccountHeaders)
+//    //the following two statements are equivalent:
+//    hdr["X-Container-Read"] = ".r:*,.rlistings"
+//    hdr.ReadACL().Set(".r:*,.rlistings")
+type FieldString struct {
+	h headerInterface
+	k string
+}
+
+//Exists checks whether there is a value for this header.
+func (f FieldString) 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 FieldString) Get() string {
+	return f.h.Get(f.k)
+}
+
+//Set writes a new value for this header into the corresponding schwift.Headers
+//instance.
+func (f FieldString) 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 FieldString) 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 FieldString) Clear() {
+	f.h.Clear(f.k)
+}
+
+func (f FieldString) validate() error {
+	return nil
+}