// *************************************************************************************************************************** | |
// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * | |
// * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * | |
// * to you 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 org.apache.juneau.dto.jsonschema; | |
import static org.apache.juneau.internal.ExceptionUtils.*; | |
import static org.apache.juneau.internal.StringUtils.*; | |
import java.io.*; | |
import java.net.*; | |
import java.util.concurrent.*; | |
import org.apache.juneau.*; | |
import org.apache.juneau.json.*; | |
/** | |
* A container for retrieving JSON {@link JsonSchema} objects by URI. | |
* | |
* <p> | |
* Subclasses must implement one of the following methods to load schemas from external sources: | |
* <ul class='spaced-list'> | |
* <li> | |
* {@link #getReader(URI)} - If schemas should be loaded from readers and automatically parsed. | |
* <li> | |
* {@link #load(URI)} - If you want control over construction of {@link JsonSchema} objects. | |
* </ul> | |
* | |
* <ul class='seealso'> | |
* <li class='jp'>{@doc package-summary.html#TOC org.apache.juneau.dto.jsonschema} | |
* </ul> | |
*/ | |
public abstract class JsonSchemaMap extends ConcurrentHashMap<URI,JsonSchema> { | |
private static final long serialVersionUID = 1L; | |
/** | |
* Return the {@link JsonSchema} object at the specified URI. | |
* | |
* <p> | |
* If this schema object has not been loaded yet, calls {@link #load(URI)}. | |
* | |
* <p> | |
* The value can be of any of the following types: {@link URI}, {@link URL}, {@link String}. | |
* Strings must be valid URIs. | |
* | |
* <p> | |
* URIs defined by {@link UriResolver} can be used for values. | |
* | |
* @param uri The URI of the schema to retrieve. | |
* @return The JsonSchema, or <jk>null</jk> if schema was not located and could not be loaded. | |
*/ | |
@Override /* Map */ | |
public JsonSchema get(Object uri) { | |
URI u = toURI(uri); | |
JsonSchema s = super.get(u); | |
if (s != null) | |
return s; | |
synchronized(this) { | |
s = load(u); | |
if (s != null) { | |
// Note: Can't use add(Schema...) since the ID property may not be set. | |
s.setSchemaMap(this); | |
put(u, s); | |
} | |
return s; | |
} | |
} | |
/** | |
* Convenience method for pre-populating this map with the specified schemas. | |
* | |
* <p> | |
* The schemas passed in through this method MUST have their ID properties set. | |
* | |
* @param schemas The set of schemas to add to this map. | |
* @return This object (for method chaining). | |
* @throws RuntimeException If one or more schema objects did not have their ID property set. | |
*/ | |
public JsonSchemaMap add(JsonSchema...schemas) { | |
for (JsonSchema schema : schemas) { | |
if (schema.getId() == null) | |
throw runtimeException("Schema with no ID passed to JsonSchemaMap.add(Schema...)"); | |
put(schema.getId(), schema); | |
schema.setSchemaMap(this); | |
} | |
return this; | |
} | |
/** | |
* Subclasses must implement either this method or {@link #getReader(URI)} to load the schema with the specified URI. | |
* | |
* <p> | |
* It's up to the implementer to decide where these come from. | |
* | |
* <p> | |
* The default implementation calls {@link #getReader(URI)} and parses the schema document. | |
* If {@link #getReader(URI)} returns <jk>null</jk>, this method returns <jk>null</jk> indicating this is an | |
* unreachable document. | |
* | |
* @param uri The URI to load the schema from. | |
* @return The parsed schema. | |
*/ | |
public JsonSchema load(URI uri) { | |
try (Reader r = getReader(uri)) { | |
if (r == null) | |
return null; | |
return JsonParser.DEFAULT.parse(r, JsonSchema.class); | |
} catch (Exception e) { | |
throw runtimeException(e); | |
} | |
} | |
/** | |
* Subclasses must implement either this method or {@link #load(URI)} to load the schema with the specified URI. | |
* | |
* <p> | |
* It's up to the implementer to decide where these come from. | |
* | |
* <p> | |
* The default implementation returns <jk>null</jk>. | |
* | |
* @param uri The URI to connect to and retrieve the contents. | |
* @return The reader from reading the specified URI. | |
*/ | |
public Reader getReader(URI uri) { | |
return null; | |
} | |
} |