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src/main/java/es/elixir/bsc/json/schema/impl/JsonSchemaElementsCache.java
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| /** | ||
| * ***************************************************************************** | ||
| * Copyright (C) 2024 ELIXIR ES, Spanish National Bioinformatics Institute (INB) | ||
| * and Barcelona Supercomputing Center (BSC) | ||
| * | ||
| * Modifications to the initial code base are copyright of their respective | ||
| * authors, or their employers as appropriate. | ||
| * | ||
| * This library is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public | ||
| * License as published by the Free Software Foundation; either | ||
| * version 2.1 of the License, or (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | ||
| * MA 02110-1301 USA | ||
| ***************************************************************************** | ||
| */ | ||
|
|
||
| package es.elixir.bsc.json.schema.impl; | ||
|
|
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| import es.elixir.bsc.json.schema.JsonSchemaLocator; | ||
| import es.elixir.bsc.json.schema.model.JsonReference; | ||
| import es.elixir.bsc.json.schema.model.impl.AbstractJsonSchema; | ||
| import es.elixir.bsc.json.schema.model.impl.AbstractJsonSchemaElement; | ||
| import es.elixir.bsc.json.schema.model.impl.JsonMultitypeSchemaWrapper; | ||
| import java.net.URI; | ||
| import java.net.URISyntaxException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * Simple HashMap based elements storage implementation. | ||
| * | ||
| * The cache doesn't store JsonMultitypeSchemaWrapper's children because all | ||
| * they have the same $id as a 'wrapper' an thus cached together. | ||
| * | ||
| * @author Dmitry Repchevsky | ||
| */ | ||
|
|
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| public class JsonSchemaElementsCache { | ||
| private final Map<URI, AbstractJsonSchema> cache = new HashMap(); | ||
|
|
||
| /** | ||
| * Get previously parsed JSON (sub)schema. | ||
| * | ||
| * @param locator the locator to the JSON schema document | ||
| * @param jsonPointer JSON pointer to the (sub)schema ("/" for the root) | ||
| * | ||
| * @return either found JSON schema or null if not found | ||
| */ | ||
| public AbstractJsonSchema get(JsonSchemaLocator locator, String jsonPointer) { | ||
| return cache.get(resolve(locator.uri, jsonPointer)); | ||
| } | ||
|
|
||
| /** | ||
| * Get previously parsed JSON (sub)schema. | ||
| * | ||
| * @param schema JSON (sub)schema template (actually we need an $id of it) | ||
| * | ||
| * @return either found JSON schema or null if not found | ||
| */ | ||
| public AbstractJsonSchema get(AbstractJsonSchema schema) { | ||
| return schema.getParent() instanceof JsonMultitypeSchemaWrapper ? null : cache.get(schema.getId()); | ||
| } | ||
|
|
||
| /** | ||
| * Put the JSON (sub)schema into the cache. | ||
| * | ||
| * @param schema (sub)schema to be put | ||
| * | ||
| * @return the same document we passed to the method | ||
| */ | ||
| public AbstractJsonSchema put(AbstractJsonSchema schema) { | ||
| if (!schema.isDynamicScope() && | ||
| !(schema.getParent() instanceof JsonMultitypeSchemaWrapper)) { | ||
| final URI id = schema.getId(); | ||
| cache.put(id, schema); | ||
|
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| // syntheticId is a real document path which might differ | ||
| // from the contextual $id | ||
| final URI syntheticId = getSyntheticId(schema); | ||
| if (!id.equals(syntheticId)) { | ||
| cache.put(syntheticId, schema); | ||
| } | ||
| } | ||
| return schema; | ||
| } | ||
|
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||
| /** | ||
| * Unlike {@code JsonSchemaElement.getId()}, synthetic identifier is | ||
| * relative to the document root. | ||
| * <pre> | ||
| * Example: | ||
| * Both URI point to the same 'items' element. | ||
| * While first one is the Json Schema $id, second is a JSON pointer in the | ||
| * 'scope_change_defs2.json' JSON document. | ||
| * 'http://localhost:1234/draft2019-09/baseUriChangeFolderInSubschema/#/$defs/bar/items' | ||
| * 'http://localhost:1234/draft2019-09/scope_change_defs2.json#/$defs/baz/$defs/bar/items' | ||
| * </pre> | ||
| * @return synthetic identifier used to resolve external $refs. | ||
| */ | ||
| private URI getSyntheticId(AbstractJsonSchemaElement e) { | ||
| final StringBuilder sb = new StringBuilder(e.jsonPointer); | ||
| while (e.getParent() != null && !(e.getParent() instanceof JsonReference)) { | ||
| e = e.getParent(); | ||
| if (!(e instanceof JsonMultitypeSchemaWrapper) && | ||
| e.jsonPointer != e.getJsonPointer() && | ||
| e.jsonPointer.length() > 1) { | ||
| sb.insert(0, e.jsonPointer); | ||
| } | ||
| } | ||
| return resolve(e.locator.uri, sb.toString()); | ||
| } | ||
|
|
||
| /** | ||
| * Resolves identifier with JSON pointer fragment part. | ||
| * | ||
| * @param uri schema identifier | ||
| * @param jsonPointer JSON pointer to the schema element | ||
| * | ||
| * @return schema element identifier | ||
| */ | ||
| private URI resolve(URI uri, String jsonPointer) { | ||
| final String fragment = uri.getFragment(); | ||
| try { | ||
| return new URI(uri.getScheme(), uri.getSchemeSpecificPart(), | ||
| fragment == null && jsonPointer.length() > 1 ? jsonPointer : jsonPointer.length() > 1 | ||
| ? fragment + jsonPointer : fragment); | ||
| } catch (URISyntaxException ex) {} | ||
| return null; | ||
| } | ||
| } |
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