Adding upstream version 2.5.1.

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

analysis/analyzer/simple/simple.go

@@ -0,0 +1,49 @@
+//  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 simple
+
+import (
+	"github.com/blevesearch/bleve/v2/analysis"
+	"github.com/blevesearch/bleve/v2/analysis/token/lowercase"
+	"github.com/blevesearch/bleve/v2/analysis/tokenizer/letter"
+	"github.com/blevesearch/bleve/v2/registry"
+)
+
+const Name = "simple"
+
+func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.Analyzer, error) {
+	tokenizer, err := cache.TokenizerNamed(letter.Name)
+	if err != nil {
+		return nil, err
+	}
+	toLowerFilter, err := cache.TokenFilterNamed(lowercase.Name)
+	if err != nil {
+		return nil, err
+	}
+	rv := analysis.DefaultAnalyzer{
+		Tokenizer: tokenizer,
+		TokenFilters: []analysis.TokenFilter{
+			toLowerFilter,
+		},
+	}
+	return &rv, nil
+}
+
+func init() {
+	err := registry.RegisterAnalyzer(Name, AnalyzerConstructor)
+	if err != nil {
+		panic(err)
+	}
+}