snapshot of https://github.com/blevesearch/bleve.git (master, 2026-09-15; blobs > 131072B omitted)

index_alias.go

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+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// 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 bleve
+
+// An IndexAlias is a wrapper around one or more
+// Index objects.  It has two distinct modes of
+// operation.
+// 1.  When it points to a single index, ALL index
+// operations are valid and will be passed through
+// to the underlying index.
+// 2.  When it points to more than one index, the only
+// valid operation is Search.  In this case the
+// search will be performed across all the
+// underlying indexes and the results merged.
+// Calls to Add/Remove/Swap the underlying indexes
+// are atomic, so you can safely change the
+// underlying Index objects while other components
+// are performing operations.
+type IndexAlias interface {
+	Index
+
+	Add(i ...Index)
+	Remove(i ...Index)
+	Swap(in, out []Index)
+}