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A more performant JSON-LD 1.1 Processor & API forked from Titanium JSON-LD.
The newest version!
/*
* Copyright 2020 APICATALOG and HASMAC.
*
* Licensed 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.
*
* SPDX-License-Identifier: Apache-2.0
*/
package no.hasmac.jsonld.lang;
import jakarta.json.JsonObject;
import jakarta.json.JsonValue;
import no.hasmac.jsonld.json.JsonProvider;
import no.hasmac.jsonld.json.JsonUtils;
public final class ListObject {
private ListObject() {
}
/**
* A list object is a map that has a @list key. It may also have
* an @index key, but no other entries. See the Lists and Sets section of
* JSON-LD 1.1 for a normative description.
*
* @see List
* Object
*
* @param value to check
* @return true
if the provided value is valid list object
*/
public static boolean isListObject(JsonValue value) {
return JsonUtils.containsKey(value, Keywords.LIST)
&& (value.asJsonObject().size() == 1
|| (value.asJsonObject().size() == 2
&& value.asJsonObject().containsKey(Keywords.INDEX)
)
);
}
/**
* Convert expanded value to a list object by first setting it to an array
* containing only expanded value if it is not already an array, and then by
* setting it to a map containing the key-value pair @list-expanded value.
*
* @param value to convert
* @return list object containing the provided value
*/
public static JsonObject toListObject(JsonValue value) {
if (JsonUtils.isArray(value)) {
return JsonProvider.instance().createObjectBuilder().add(Keywords.LIST, value).build();
}
return JsonProvider.instance().createObjectBuilder().add(Keywords.LIST, JsonProvider.instance().createArrayBuilder().add(value)).build();
}
}