-
Notifications
You must be signed in to change notification settings - Fork 215
/
CreateThingSubstitutionStrategy.java
85 lines (70 loc) · 3.32 KB
/
CreateThingSubstitutionStrategy.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.edge.service.dispatching.signaltransformer.placeholdersubstitution.things;
import static java.util.Objects.requireNonNull;
import java.util.Objects;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.edge.service.dispatching.signaltransformer.placeholdersubstitution.AbstractTypedSubstitutionStrategy;
import org.eclipse.ditto.edge.service.dispatching.signaltransformer.placeholdersubstitution.HeaderBasedPlaceholderSubstitutionAlgorithm;
import org.eclipse.ditto.json.JsonObject;
import org.eclipse.ditto.policies.model.PoliciesModelFactory;
import org.eclipse.ditto.policies.model.Policy;
import org.eclipse.ditto.things.model.signals.commands.modify.CreateThing;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Handles substitution for Policy {@link org.eclipse.ditto.policies.model.SubjectId}s
* inside a {@link CreateThing} command.
*/
final class CreateThingSubstitutionStrategy extends AbstractTypedSubstitutionStrategy<CreateThing> {
private static final Logger LOGGER = LoggerFactory.getLogger(CreateThingSubstitutionStrategy.class);
CreateThingSubstitutionStrategy() {
super(CreateThing.class);
}
@Override
public CreateThing apply(final CreateThing createThing,
final HeaderBasedPlaceholderSubstitutionAlgorithm substitutionAlgorithm) {
requireNonNull(createThing);
requireNonNull(substitutionAlgorithm);
final DittoHeaders dittoHeaders = createThing.getDittoHeaders();
final JsonObject inlinePolicyJson = createThing.getInitialPolicy().orElse(null);
final JsonObject substitutedInlinePolicyJson;
if (inlinePolicyJson == null) {
substitutedInlinePolicyJson = null;
} else {
substitutedInlinePolicyJson =
substituteInitialPolicy(inlinePolicyJson, substitutionAlgorithm, dittoHeaders);
}
if (Objects.equals(inlinePolicyJson, substitutedInlinePolicyJson)) {
return createThing;
} else {
return CreateThing.of(createThing.getThing(), substitutedInlinePolicyJson,
createThing.getPolicyIdOrPlaceholder().orElse(null), dittoHeaders);
}
}
private static JsonObject substituteInitialPolicy(final JsonObject initialPolicy,
final HeaderBasedPlaceholderSubstitutionAlgorithm substitutionAlgorithm,
final DittoHeaders dittoHeaders) {
Policy existingPolicy;
try {
existingPolicy = PoliciesModelFactory.newPolicy(initialPolicy);
} catch (final RuntimeException e) {
// Just log to debug, error is handled somewhere else
LOGGER.debug("Failed to parse initial policy.", e);
return initialPolicy;
}
final Policy substitutedPolicy =
substitutePolicy(existingPolicy, substitutionAlgorithm, dittoHeaders);
return substitutedPolicy.toJson();
}
}