Adding upstream version 2.5.1.

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

analysis/type.go

@@ -0,0 +1,120 @@
+//  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 analysis
+
+import (
+	"fmt"
+	"time"
+)
+
+type CharFilter interface {
+	Filter([]byte) []byte
+}
+
+type TokenType int
+
+const (
+	AlphaNumeric TokenType = iota
+	Ideographic
+	Numeric
+	DateTime
+	Shingle
+	Single
+	Double
+	Boolean
+	IP
+)
+
+// Token represents one occurrence of a term at a particular location in a
+// field.
+type Token struct {
+	// Start specifies the byte offset of the beginning of the term in the
+	// field.
+	Start int `json:"start"`
+
+	// End specifies the byte offset of the end of the term in the field.
+	End  int    `json:"end"`
+	Term []byte `json:"term"`
+
+	// Position specifies the 1-based index of the token in the sequence of
+	// occurrences of its term in the field.
+	Position int       `json:"position"`
+	Type     TokenType `json:"type"`
+	KeyWord  bool      `json:"keyword"`
+}
+
+func (t *Token) String() string {
+	return fmt.Sprintf("Start: %d  End: %d  Position: %d  Token: %s  Type: %d", t.Start, t.End, t.Position, string(t.Term), t.Type)
+}
+
+type TokenStream []*Token
+
+// A Tokenizer splits an input string into tokens, the usual behaviour being to
+// map words to tokens.
+type Tokenizer interface {
+	Tokenize([]byte) TokenStream
+}
+
+// A TokenFilter adds, transforms or removes tokens from a token stream.
+type TokenFilter interface {
+	Filter(TokenStream) TokenStream
+}
+
+type Analyzer interface {
+	Analyze([]byte) TokenStream
+}
+
+type DefaultAnalyzer struct {
+	CharFilters  []CharFilter
+	Tokenizer    Tokenizer
+	TokenFilters []TokenFilter
+}
+
+func (a *DefaultAnalyzer) Analyze(input []byte) TokenStream {
+	if a.CharFilters != nil {
+		for _, cf := range a.CharFilters {
+			input = cf.Filter(input)
+		}
+	}
+	tokens := a.Tokenizer.Tokenize(input)
+	if a.TokenFilters != nil {
+		for _, tf := range a.TokenFilters {
+			tokens = tf.Filter(tokens)
+		}
+	}
+	return tokens
+}
+
+var ErrInvalidDateTime = fmt.Errorf("unable to parse datetime with any of the layouts")
+
+var ErrInvalidTimestampString = fmt.Errorf("unable to parse timestamp string")
+var ErrInvalidTimestampRange = fmt.Errorf("timestamp out of range")
+
+type DateTimeParser interface {
+	ParseDateTime(string) (time.Time, string, error)
+}
+
+const SynonymSourceType = "synonym"
+
+type SynonymSourceVisitor func(name string, item SynonymSource) error
+
+type SynonymSource interface {
+	Analyzer() string
+	Collection() string
+}
+
+type ByteArrayConverter interface {
+	Convert([]byte) (interface{}, error)
+}