143 lines
2.5 KiB
Go
143 lines
2.5 KiB
Go
// Copyright © 2016 Abcum Ltd
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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 sql
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import (
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"encoding/json"
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"fmt"
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"strconv"
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"time"
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)
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func in(token Token, tokens []Token) bool {
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for _, t := range tokens {
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if token == t {
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return true
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}
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}
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return false
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}
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func is(token Token, tokens ...Token) bool {
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for _, t := range tokens {
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if token == t {
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return true
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}
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}
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return false
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}
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func contains(search string, strings []string) bool {
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for _, str := range strings {
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if str == search {
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return true
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}
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}
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return false
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}
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func declare(tok Token, lit string) (Expr, error) {
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switch tok {
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case NULL:
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return &Null{}, nil
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case VOID:
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return &Void{}, nil
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case EMPTY:
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return &Empty{}, nil
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case ALL:
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return &Wildcard{}, nil
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case ASC:
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return &Asc{}, nil
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case DESC:
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return &Desc{}, nil
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case ID:
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return &IdentLiteral{Val: lit}, nil
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case IDENT:
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return &IdentLiteral{Val: lit}, nil
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case NOW:
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return &DatetimeLiteral{Val: time.Now()}, nil
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case DATE:
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t, err := time.Parse("2006-01-02", lit)
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return &DatetimeLiteral{Val: t}, err
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case TIME:
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t, err := time.Parse(time.RFC3339, lit)
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return &DatetimeLiteral{Val: t}, err
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case TRUE:
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return &BooleanLiteral{Val: true}, nil
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case FALSE:
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return &BooleanLiteral{Val: false}, nil
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case STRING:
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return &StringLiteral{Val: lit}, nil
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case REGION:
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return &StringLiteral{Val: lit}, nil
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case NUMBER:
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i, err := strconv.ParseInt(lit, 10, 64)
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return &NumberLiteral{Val: i}, err
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case DOUBLE:
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f, err := strconv.ParseFloat(lit, 64)
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return &DoubleLiteral{Val: f}, err
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case DURATION:
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t, err := time.ParseDuration(lit)
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return &DurationLiteral{Val: t}, err
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case ARRAY:
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var j ArrayLiteral
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json.Unmarshal([]byte(lit), &j.Val)
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if j.Val == nil {
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return &j, fmt.Errorf("Invalid JSON: %s", lit)
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}
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return &j, nil
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case JSON:
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var j JSONLiteral
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json.Unmarshal([]byte(lit), &j.Val)
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if j.Val == nil {
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return &j, fmt.Errorf("Invalid JSON: %s", lit)
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}
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return &j, nil
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}
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return lit, nil
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}
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