Create quads hierarchy
* Move nquads into quad. * Create cquads simplified parser in quad. * Move Triple (renamed Quad) to quad. Also made sure mongo actually implements BulkLoader.
This commit is contained in:
kortschak
parent
01bc63810b
commit
401c58426f
51 changed files with 13400 additions and 5495 deletions
95
quad/cquads/actions.rl
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95
quad/cquads/actions.rl
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// Copyright 2014 The Cayley Authors. All rights reserved.
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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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%%{
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machine quads;
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action Escape {
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isEscaped = true
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}
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action Quote {
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isQuoted = true
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}
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action StartSubject {
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subject = p
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}
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action StartPredicate {
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predicate = p
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}
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action StartObject {
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object = p
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}
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action StartLabel {
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label = p
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}
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action SetSubject {
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if subject < 0 {
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panic("unexpected parser state: subject start not set")
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}
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q.Subject = unEscape(data[subject:p], isQuoted, isEscaped)
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isEscaped = false
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isQuoted = false
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}
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action SetPredicate {
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if predicate < 0 {
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panic("unexpected parser state: predicate start not set")
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}
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q.Predicate = unEscape(data[predicate:p], isQuoted, isEscaped)
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isEscaped = false
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isQuoted = false
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}
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action SetObject {
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if object < 0 {
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panic("unexpected parser state: object start not set")
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}
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q.Object = unEscape(data[object:p], isQuoted, isEscaped)
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isEscaped = false
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isQuoted = false
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}
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action SetLabel {
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if label < 0 {
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panic("unexpected parser state: label start not set")
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}
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q.Provenance = unEscape(data[label:p], isQuoted, isEscaped)
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isEscaped = false
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isQuoted = false
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}
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action Return {
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return q, nil
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}
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action Comment {
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}
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action Error {
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if p < len(data) {
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if r := data[p]; r < unicode.MaxASCII {
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return q, fmt.Errorf("%v: unexpected rune %q at %d", quad.ErrInvalid, data[p], p)
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} else {
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return q, fmt.Errorf("%v: unexpected rune %q (\\u%04x) at %d", quad.ErrInvalid, data[p], data[p], p)
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}
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}
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return q, quad.ErrIncomplete
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}
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}%%
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141
quad/cquads/cquads.go
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141
quad/cquads/cquads.go
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// Copyright 2014 The Cayley Authors. All rights reserved.
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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 cquads implements parsing N-Quads like line-based syntax
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// for RDF datasets.
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//
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// N-Quad parsing is performed as based on a simplified grammar derived from
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// the N-Quads grammar defined by http://www.w3.org/TR/n-quads/.
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//
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// For a complete definition of the grammar, see cquads.rl.
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package cquads
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"strconv"
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"github.com/google/cayley/quad"
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)
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// Parse returns a valid quad.Quad or a non-nil error. Parse does
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// handle comments except where the comment placement does not prevent
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// a complete valid quad.Quad from being defined.
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func Parse(str string) (*quad.Quad, error) {
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q, err := parse([]rune(str))
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return &q, err
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}
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// Decoder implements simplified N-Quad document parsing.
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type Decoder struct {
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r *bufio.Reader
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line []byte
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}
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// NewDecoder returns an N-Quad decoder that takes its input from the
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// provided io.Reader.
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func NewDecoder(r io.Reader) *Decoder {
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return &Decoder{r: bufio.NewReader(r)}
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}
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// Unmarshal returns the next valid N-Quad as a quad.Quad, or an error.
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func (dec *Decoder) Unmarshal() (*quad.Quad, error) {
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dec.line = dec.line[:0]
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var line []byte
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for {
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for {
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l, pre, err := dec.r.ReadLine()
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if err != nil {
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return nil, err
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}
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dec.line = append(dec.line, l...)
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if !pre {
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break
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}
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}
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if line = bytes.TrimSpace(dec.line); len(line) != 0 && line[0] != '#' {
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break
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}
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dec.line = dec.line[:0]
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}
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triple, err := Parse(string(line))
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if err != nil {
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return nil, fmt.Errorf("failed to parse %q: %v", dec.line, err)
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}
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if triple == nil {
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return dec.Unmarshal()
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}
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return triple, nil
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}
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func unEscape(r []rune, isQuoted, isEscaped bool) string {
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if isQuoted {
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r = r[1 : len(r)-1]
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}
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if !isEscaped {
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return string(r)
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}
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buf := bytes.NewBuffer(make([]byte, 0, len(r)))
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for i := 0; i < len(r); {
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switch r[i] {
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case '\\':
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i++
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var c byte
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switch r[i] {
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case 't':
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c = '\t'
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case 'b':
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c = '\b'
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case 'n':
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c = '\n'
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case 'r':
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c = '\r'
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case 'f':
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c = '\f'
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case '"':
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c = '"'
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case '\'':
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c = '\''
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case '\\':
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c = '\\'
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case 'u':
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rc, err := strconv.ParseInt(string(r[i+1:i+5]), 16, 32)
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if err != nil {
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panic(fmt.Errorf("internal parser error: %v", err))
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}
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buf.WriteRune(rune(rc))
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i += 5
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continue
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case 'U':
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rc, err := strconv.ParseInt(string(r[i+1:i+9]), 16, 32)
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if err != nil {
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panic(fmt.Errorf("internal parser error: %v", err))
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}
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buf.WriteRune(rune(rc))
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i += 9
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continue
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}
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buf.WriteByte(c)
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default:
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buf.WriteRune(r[i])
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}
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i++
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}
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return buf.String()
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}
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106
quad/cquads/cquads.rl
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106
quad/cquads/cquads.rl
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// Copyright 2014 The Cayley Authors. All rights reserved.
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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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// Ragel gramar definition derived from http://www.w3.org/TR/n-quads/#sec-grammar.
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%%{
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machine quads;
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alphtype rune;
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PN_CHARS_BASE = [A-Za-z]
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| 0x00c0 .. 0x00d6
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| 0x00d8 .. 0x00f6
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| 0x00f8 .. 0x02ff
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| 0x0370 .. 0x037d
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| 0x037f .. 0x1fff
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| 0x200c .. 0x200d
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| 0x2070 .. 0x218f
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| 0x2c00 .. 0x2fef
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| 0x3001 .. 0xd7ff
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| 0xf900 .. 0xfdcf
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| 0xfdf0 .. 0xfffd
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| 0x10000 .. 0xeffff
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;
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PN_CHARS_U = PN_CHARS_BASE | '_' | ':' ;
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PN_CHARS = PN_CHARS_U
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| '-'
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| [0-9]
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| 0xb7
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| 0x0300 .. 0x036f
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| 0x203f .. 0x2040
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;
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ECHAR = ('\\' [tbnrf"'\\]) %Escape ;
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UCHAR = ('\\u' xdigit {4}
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| '\\U' xdigit {8}) %Escape
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;
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BLANK_NODE_LABEL = '_:' (PN_CHARS_U | [0-9]) ((PN_CHARS | '.')* PN_CHARS)? ;
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STRING_LITERAL = (
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'!'
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| '#' .. '['
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| ']' .. 0x7e
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| 0x80 .. 0x10ffff
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| ECHAR
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| UCHAR)+ - ('_:' | any* '.' | '#' any*)
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;
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STRING_LITERAL_QUOTE = '"' (
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0x00 .. 0x09
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| 0x0b .. 0x0c
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| 0x0e .. '!'
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| '#' .. '['
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| ']' .. 0x10ffff
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| ECHAR
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| UCHAR)*
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'"'
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;
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IRIREF = '<' (
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'!' .. ';'
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| '='
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| '?' .. '['
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| ']'
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| '_'
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| 'a' .. 'z'
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| '~'
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| 0x80 .. 0x10ffff
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| UCHAR)*
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'>'
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;
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LANGTAG = '@' [a-zA-Z]+ ('-' [a-zA-Z0-9]+)* ;
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whitespace = [ \t] ;
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literal = STRING_LITERAL | STRING_LITERAL_QUOTE % Quote | STRING_LITERAL_QUOTE ('^^' IRIREF | LANGTAG) ;
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subject = (literal | BLANK_NODE_LABEL) ;
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predicate = literal ;
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object = (literal | BLANK_NODE_LABEL) ;
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graphLabel = (literal | BLANK_NODE_LABEL) ;
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statement := (
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whitespace* subject >StartSubject %SetSubject
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whitespace+ predicate >StartPredicate %SetPredicate
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whitespace+ object >StartObject %SetObject
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(whitespace+ graphLabel >StartLabel %SetLabel)?
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whitespace* '.' whitespace* ('#' any*)? >Comment
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) %Return @!Error ;
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}%%
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782
quad/cquads/cquads_test.go
Normal file
782
quad/cquads/cquads_test.go
Normal file
File diff suppressed because it is too large
Load diff
6692
quad/cquads/parse.go
Normal file
6692
quad/cquads/parse.go
Normal file
File diff suppressed because it is too large
Load diff
58
quad/cquads/parse.rl
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58
quad/cquads/parse.rl
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@ -0,0 +1,58 @@
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// GO SOURCE FILE MACHINE GENERATED BY RAGEL; DO NOT EDIT
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// Copyright 2014 The Cayley Authors. All rights reserved.
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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 cquads
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import (
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"fmt"
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"unicode"
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"github.com/google/cayley/quad"
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)
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%%{
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machine quads;
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include "actions.rl";
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include "cquads.rl";
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write data;
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}%%
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func parse(data []rune) (quad.Quad, error) {
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var (
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cs, p int
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pe = len(data)
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eof = pe
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subject = -1
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predicate = -1
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object = -1
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label = -1
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isEscaped bool
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isQuoted bool
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q quad.Quad
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)
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%%write init;
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%%write exec;
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return quad.Quad{}, quad.ErrInvalid
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}
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