110 lines
2.8 KiB
Go
110 lines
2.8 KiB
Go
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// Copyright 2015 xeipuuv ( https://github.com/xeipuuv )
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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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// author xeipuuv
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// author-github https://github.com/xeipuuv
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// author-mail xeipuuv@gmail.com
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//
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// repository-name gojsonschema
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// repository-desc An implementation of JSON Schema, based on IETF's draft v4 - Go language.
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//
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// description Defines resources pooling.
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// Eases referencing and avoids downloading the same resource twice.
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//
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// created 26-02-2013
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package gojsonschema
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import (
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"errors"
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"github.com/xeipuuv/gojsonreference"
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)
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type schemaPoolDocument struct {
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Document interface{}
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}
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type schemaPool struct {
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schemaPoolDocuments map[string]*schemaPoolDocument
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standaloneDocument interface{}
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jsonLoaderFactory JSONLoaderFactory
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}
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func newSchemaPool(f JSONLoaderFactory) *schemaPool {
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p := &schemaPool{}
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p.schemaPoolDocuments = make(map[string]*schemaPoolDocument)
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p.standaloneDocument = nil
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p.jsonLoaderFactory = f
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return p
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}
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func (p *schemaPool) SetStandaloneDocument(document interface{}) {
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p.standaloneDocument = document
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}
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func (p *schemaPool) GetStandaloneDocument() (document interface{}) {
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return p.standaloneDocument
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}
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func (p *schemaPool) GetDocument(reference gojsonreference.JsonReference) (*schemaPoolDocument, error) {
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if internalLogEnabled {
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internalLog("Get Document ( %s )", reference.String())
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}
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var err error
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// It is not possible to load anything that is not canonical...
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if !reference.IsCanonical() {
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return nil, errors.New(formatErrorDescription(
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Locale.ReferenceMustBeCanonical(),
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ErrorDetails{"reference": reference},
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))
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}
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refToUrl := reference
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refToUrl.GetUrl().Fragment = ""
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var spd *schemaPoolDocument
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// Try to find the requested document in the pool
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for k := range p.schemaPoolDocuments {
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if k == refToUrl.String() {
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spd = p.schemaPoolDocuments[k]
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}
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}
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if spd != nil {
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if internalLogEnabled {
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internalLog(" From pool")
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}
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return spd, nil
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}
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jsonReferenceLoader := p.jsonLoaderFactory.New(reference.String())
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document, err := jsonReferenceLoader.LoadJSON()
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if err != nil {
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return nil, err
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}
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spd = &schemaPoolDocument{Document: document}
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// add the document to the pool for potential later use
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p.schemaPoolDocuments[refToUrl.String()] = spd
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return spd, nil
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}
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