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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.json;
import jakarta.json.JsonArray;
import jakarta.json.JsonObject;
import jakarta.json.JsonValue;
import no.hasmac.jsonld.lang.Keywords;
import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;
import java.util.Objects;
/**
*
* @see JSON-LD Object comparison
*
*/
public final class JsonLdComparison {
private JsonLdComparison() {
}
public static boolean equals(final JsonValue value1, final JsonValue value2) {
return equals(value1, value2, null);
}
private static boolean equals(final JsonValue value1, final JsonValue value2, final String parentProperty) {
if (JsonUtils.isNull(value1) && JsonUtils.isNull(value2)) {
return true;
}
if (JsonUtils.isScalar(value1) && JsonUtils.isScalar(value2)) {
return Objects.equals(value1, value2);
}
if (JsonUtils.isArray(value1) && JsonUtils.isArray(value2)) {
return arrayEquals(value1.asJsonArray(), value2.asJsonArray(), parentProperty);
}
if (JsonUtils.isObject(value1) && JsonUtils.isObject(value2)) {
return objectEquals(value1.asJsonObject(), value2.asJsonObject());
}
return false;
}
private static boolean objectEquals(final JsonObject object1, final JsonObject object2) {
if (object1.size() != object2.size()) {
return false;
}
for (final Entry entry1 : object1.entrySet()) {
if (!object2.containsKey(entry1.getKey())) {
return false;
}
if (!equals(entry1.getValue(), object2.get(entry1.getKey()), entry1.getKey())) {
return false;
}
}
return true;
}
private static boolean arrayEquals(final JsonArray array1, final JsonArray array2, final String parentProperty) {
if (array1.size() != array2.size()) {
return false;
}
if (array1.isEmpty()) {
return true;
}
// For values of @list, the order of these items is significant
if (Keywords.LIST.equals(parentProperty)) {
for (int i=0; i < array1.size(); i++) {
if (!equals(array1.get(i), array2.get(i))) {
return false;
}
}
return true;
}
return arraysEqualsUnordered(array1, array2);
}
// JSON arrays are generally compared without regard to order
private static boolean arraysEqualsUnordered(final JsonArray array1, final JsonArray array2) {
if (array1.size() != array2.size()) {
return false;
}
if (array1.isEmpty()) {
return true;
}
final List remaining = new ArrayList<>(array2);
for (final JsonValue item1 : array1) {
boolean found = false;
for (final JsonValue item2 : remaining) {
found = equals(item1, item2);
if (found) {
remaining.remove(item2);
break;
}
}
if (!found) {
return false;
}
}
return remaining.isEmpty();
}
}