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TermMappingHolder.java
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TermMappingHolder.java
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/*
* JB4JSON-LD
* Copyright (C) 2023 Czech Technical University in Prague
*
* 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 3.0 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.
*/
package cz.cvut.kbss.jsonld.serialization.context;
import cz.cvut.kbss.jsonld.JsonLd;
import cz.cvut.kbss.jsonld.serialization.model.JsonNode;
import cz.cvut.kbss.jsonld.serialization.model.ObjectNode;
import cz.cvut.kbss.jsonld.serialization.model.StringLiteralNode;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
abstract class TermMappingHolder {
final TermMappingHolder parentContext;
TermMappingHolder(TermMappingHolder parentContext) {
this.parentContext = parentContext;
}
abstract boolean canRegisterTermMapping(String term, JsonNode mappedNode);
abstract void registerTermMapping(String Term, JsonNode node);
abstract Optional<JsonNode> getTermMapping(String term);
abstract Map<String, JsonNode> getMapping();
abstract boolean hasTermMapping(String term);
abstract boolean hasTermMapping(String term, JsonNode mappedNode);
abstract boolean isEmpty();
abstract boolean isRoot();
public Optional<String> getMappedTerm(String iri) {
Objects.requireNonNull(iri);
for (Map.Entry<String, JsonNode> e : getMapping().entrySet()) {
final Optional<String> id = extractId(e.getValue());
if (id.isPresent() && iri.equals(id.get())) {
return Optional.of(e.getKey());
}
}
return Optional.empty();
}
private static Optional<String> extractId(JsonNode node) {
assert node instanceof StringLiteralNode || node instanceof ObjectNode;
if (node instanceof StringLiteralNode) {
return Optional.of(((StringLiteralNode) node).getValue());
} else {
final ObjectNode on = (ObjectNode) node;
return on.getItems().stream().filter(item -> JsonLd.ID.equals(item.getName()))
.map(idNode -> ((StringLiteralNode) idNode).getValue()).findAny();
}
}
}