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37 lines
1.3 KiB
37 lines
1.3 KiB
// Copyright (c) 2014 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package bleve
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// An IndexAlias is a wrapper around one or more
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// Index objects. It has two distinct modes of
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// operation.
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// 1. When it points to a single index, ALL index
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// operations are valid and will be passed through
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// to the underlying index.
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// 2. When it points to more than one index, the only
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// valid operation is Search. In this case the
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// search will be performed across all the
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// underlying indexes and the results merged.
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// Calls to Add/Remove/Swap the underlying indexes
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// are atomic, so you can safely change the
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// underlying Index objects while other components
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// are performing operations.
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type IndexAlias interface {
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Index
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Add(i ...Index)
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Remove(i ...Index)
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Swap(in, out []Index)
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}
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