Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

search/query/match_all.go

@@ -0,0 +1,56 @@
+//  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 query
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/blevesearch/bleve/v2/mapping"
+	"github.com/blevesearch/bleve/v2/search"
+	"github.com/blevesearch/bleve/v2/search/searcher"
+	index "github.com/blevesearch/bleve_index_api"
+)
+
+type MatchAllQuery struct {
+	BoostVal *Boost `json:"boost,omitempty"`
+}
+
+// NewMatchAllQuery creates a Query which will
+// match all documents in the index.
+func NewMatchAllQuery() *MatchAllQuery {
+	return &MatchAllQuery{}
+}
+
+func (q *MatchAllQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *MatchAllQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *MatchAllQuery) Searcher(ctx context.Context, i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewMatchAllSearcher(ctx, i, q.BoostVal.Value(), options)
+}
+
+func (q *MatchAllQuery) MarshalJSON() ([]byte, error) {
+	tmp := map[string]interface{}{
+		"boost":     q.BoostVal,
+		"match_all": map[string]interface{}{},
+	}
+	return json.Marshal(tmp)
+}