initial commit

vendor/github.com/blevesearch/bleve/index/firestorm/dump.go

@@ -0,0 +1,92 @@
+//  Copyright (c) 2015 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 firestorm
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/index/store"
+)
+
+// the functions in this file are only intended to be used by
+// the bleve_dump utility and the debug http handlers
+// if your application relies on them, you're doing something wrong
+// they may change or be removed at any time
+
+func (f *Firestorm) dumpPrefix(kvreader store.KVReader, rv chan interface{}, prefix []byte) error {
+	return visitPrefix(kvreader, prefix, func(key, val []byte) (bool, error) {
+		row, err := parseFromKeyValue(key, val)
+		if err != nil {
+			rv <- err
+			return false, err
+		}
+		rv <- row
+		return true, nil
+	})
+}
+
+func (f *Firestorm) dumpDoc(kvreader store.KVReader, rv chan interface{}, docID []byte) error {
+	// without a back index we have no choice but to walk the term freq and stored rows
+
+	// walk the term freqs
+	err := visitPrefix(kvreader, TermFreqKeyPrefix, func(key, val []byte) (bool, error) {
+		tfr, err := NewTermFreqRowKV(key, val)
+		if err != nil {
+			rv <- err
+			return false, err
+		}
+		if bytes.Compare(tfr.DocID(), docID) == 0 {
+			rv <- tfr
+		}
+		return true, nil
+	})
+
+	if err != nil {
+		return err
+	}
+
+	// now walk the stored
+	err = visitPrefix(kvreader, StoredKeyPrefix, func(key, val []byte) (bool, error) {
+		sr, err := NewStoredRowKV(key, val)
+		if err != nil {
+			rv <- err
+			return false, err
+		}
+		if bytes.Compare(sr.DocID(), docID) == 0 {
+			rv <- sr
+		}
+		return true, nil
+	})
+
+	return err
+}
+
+func parseFromKeyValue(key, value []byte) (index.IndexRow, error) {
+	if len(key) > 0 {
+		switch key[0] {
+		case VersionKey[0]:
+			return NewVersionRowV(value)
+		case FieldKeyPrefix[0]:
+			return NewFieldRowKV(key, value)
+		case DictionaryKeyPrefix[0]:
+			return NewDictionaryRowKV(key, value)
+		case TermFreqKeyPrefix[0]:
+			return NewTermFreqRowKV(key, value)
+		case StoredKeyPrefix[0]:
+			return NewStoredRowKV(key, value)
+		case InternalKeyPrefix[0]:
+			return NewInternalRowKV(key, value)
+		}
+		return nil, fmt.Errorf("Unknown field type '%s'", string(key[0]))
+	}
+	return nil, fmt.Errorf("Invalid empty key")
+}