/
SubjectsDeletedPartially.java
executable file
·257 lines (226 loc) · 10.7 KB
/
SubjectsDeletedPartially.java
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/*
* Copyright (c) 2021 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.policies.model.signals.events;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.time.Instant;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.model.entity.metadata.Metadata;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.base.model.json.FieldType;
import org.eclipse.ditto.base.model.json.JsonParsableEvent;
import org.eclipse.ditto.base.model.json.JsonSchemaVersion;
import org.eclipse.ditto.base.model.signals.events.EventJsonDeserializer;
import org.eclipse.ditto.json.JsonCollectors;
import org.eclipse.ditto.json.JsonFactory;
import org.eclipse.ditto.json.JsonField;
import org.eclipse.ditto.json.JsonFieldDefinition;
import org.eclipse.ditto.json.JsonObject;
import org.eclipse.ditto.json.JsonObjectBuilder;
import org.eclipse.ditto.json.JsonPointer;
import org.eclipse.ditto.json.JsonValue;
import org.eclipse.ditto.policies.model.Label;
import org.eclipse.ditto.policies.model.PolicyId;
import org.eclipse.ditto.policies.model.SubjectId;
/**
* This event is emitted after several {@link org.eclipse.ditto.policies.model.Subject}s of a Policy
* in multiple policy entries were deleted.
*
* @since 2.0.0
*/
@Immutable
@JsonParsableEvent(name = SubjectsDeletedPartially.NAME, typePrefix = PolicyEvent.TYPE_PREFIX)
public final class SubjectsDeletedPartially extends AbstractPolicyActionEvent<SubjectsDeletedPartially> {
/**
* Name of this event.
*/
public static final String NAME = "subjectsDeletedPartially";
/**
* Type of this event.
*/
public static final String TYPE = TYPE_PREFIX + NAME;
public static final JsonFieldDefinition<JsonObject> JSON_DELETED_SUBJECT_IDS =
JsonFactory.newJsonObjectFieldDefinition("deletedSubjectIds", FieldType.REGULAR,
JsonSchemaVersion.V_2);
private final Map<Label, Collection<SubjectId>> deletedSubjectIds;
private SubjectsDeletedPartially(
final PolicyId policyId,
final Map<Label, Collection<SubjectId>> deletedSubjectIds,
final long revision,
@Nullable final Instant timestamp,
final DittoHeaders dittoHeaders,
@Nullable final Metadata metadata) {
super(TYPE, checkNotNull(policyId, "policyId"), revision, timestamp, dittoHeaders, metadata);
// Copying and unmodifiable wrapping happen in the factory method.
// Constructor does not copy in order to share the known unmodifiable field between instances.
this.deletedSubjectIds = deletedSubjectIds;
}
private SubjectsDeletedPartially(
final PolicyId policyId,
final JsonObject deletedSubjectIds,
final long revision,
@Nullable final Instant timestamp,
final DittoHeaders dittoHeaders,
@Nullable final Metadata metadata) {
super(TYPE, checkNotNull(policyId, "policyId"), revision, timestamp, dittoHeaders, metadata);
this.deletedSubjectIds =
deletedSubjectsFromJson(checkNotNull(deletedSubjectIds, "deletedSubjectIds"));
}
/**
* Constructs a new {@code SubjectsDeletedPartially} object.
*
* @param policyId the policy ID.
* @param deletedSubjectIds IDs of subjects that are deleted indexed by their policy entry labels.
* @param revision the revision of the Policy.
* @param timestamp the timestamp of this event.
* @param dittoHeaders the headers of the command which was the cause of this event.
* @param metadata the metadata to apply for the event.
* @return the created SubjectsDeletedPartially.
* @throws NullPointerException if any argument but {@code timestamp} is {@code null}.
*/
public static SubjectsDeletedPartially of(final PolicyId policyId,
final Map<Label, Collection<SubjectId>> deletedSubjectIds,
final long revision,
@Nullable final Instant timestamp,
final DittoHeaders dittoHeaders,
@Nullable final Metadata metadata) {
return new SubjectsDeletedPartially(policyId,
Collections.unmodifiableMap(
new LinkedHashMap<>(checkNotNull(deletedSubjectIds, "deletedSubjectIds"))),
revision, timestamp, dittoHeaders, metadata);
}
/**
* Creates a new {@code SubjectsDeletedPartially} from a JSON object.
*
* @param jsonObject the JSON object from which a new SubjectsDeletedPartially instance is to be created.
* @param dittoHeaders the headers of the command which was the cause of this event.
* @return the {@code SubjectsDeletedPartially} which was created from the given JSON object.
* @throws NullPointerException if {@code jsonObject} is {@code null}.
* @throws org.eclipse.ditto.json.JsonParseException if the passed in {@code jsonObject} was not in the expected
* 'SubjectsDeletedPartially' format.
*/
public static SubjectsDeletedPartially fromJson(final JsonObject jsonObject, final DittoHeaders dittoHeaders) {
return new EventJsonDeserializer<SubjectsDeletedPartially>(TYPE, jsonObject).deserialize(
(revision, timestamp, metadata) -> {
final String extractedPolicyId = jsonObject.getValueOrThrow(PolicyEvent.JsonFields.POLICY_ID);
final PolicyId policyId = PolicyId.of(extractedPolicyId);
final JsonObject activatedSubjects = jsonObject.getValueOrThrow(JSON_DELETED_SUBJECT_IDS);
return new SubjectsDeletedPartially(policyId, activatedSubjects, revision, timestamp, dittoHeaders,
metadata);
});
}
/**
* Returns the IDs of deleted subjects indexed by the labels of policy entries they belong to.
*
* @return the deleted subject IDs.
*/
public Map<Label, Collection<SubjectId>> getDeletedSubjectIds() {
return deletedSubjectIds;
}
@Override
public Optional<JsonValue> getEntity(final JsonSchemaVersion schemaVersion) {
return Optional.of(deletedSubjectsToJson(deletedSubjectIds));
}
@Override
public SubjectsDeletedPartially setEntity(final JsonValue entity) {
return new SubjectsDeletedPartially(getPolicyEntityId(), entity.asObject(), getRevision(),
getTimestamp().orElse(null), getDittoHeaders(), getMetadata().orElse(null));
}
@Override
public JsonPointer getResourcePath() {
return JsonPointer.empty();
}
@Override
public SubjectsDeletedPartially setRevision(final long revision) {
return new SubjectsDeletedPartially(getPolicyEntityId(), deletedSubjectIds, revision,
getTimestamp().orElse(null), getDittoHeaders(), getMetadata().orElse(null));
}
@Override
public SubjectsDeletedPartially setDittoHeaders(final DittoHeaders dittoHeaders) {
return new SubjectsDeletedPartially(getPolicyEntityId(), deletedSubjectIds, getRevision(),
getTimestamp().orElse(null), dittoHeaders, getMetadata().orElse(null));
}
@Override
protected void appendPayload(final JsonObjectBuilder jsonObjectBuilder, final JsonSchemaVersion schemaVersion,
final Predicate<JsonField> thePredicate) {
final Predicate<JsonField> predicate = schemaVersion.and(thePredicate);
jsonObjectBuilder.set(JSON_DELETED_SUBJECT_IDS, deletedSubjectsToJson(deletedSubjectIds),
predicate);
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), deletedSubjectIds);
}
@Override
public SubjectsDeletedPartially aggregateWith(final Collection<PolicyActionEvent<?>> otherPolicyActionEvents) {
return aggregateWithSubjectDeleted(deletedSubjectIds, otherPolicyActionEvents);
}
@Override
public boolean equals(@Nullable final Object o) {
if (this == o) {
return true;
}
if (null == o || getClass() != o.getClass()) {
return false;
}
final SubjectsDeletedPartially that = (SubjectsDeletedPartially) o;
return Objects.equals(deletedSubjectIds, that.deletedSubjectIds) && super.equals(that);
}
@Override
protected boolean canEqual(@Nullable final Object other) {
return other instanceof SubjectsDeletedPartially;
}
@Override
public String toString() {
return getClass().getSimpleName() + " [" + super.toString() +
", deletedSubjectIds=" + deletedSubjectIds +
"]";
}
private static JsonObject deletedSubjectsToJson(final Map<Label, Collection<SubjectId>> deletedSubjects) {
return deletedSubjects.entrySet()
.stream()
.map(entry -> JsonField.newInstance(entry.getKey(), entry.getValue().stream()
.map(SubjectId::toString)
.map(JsonValue::of)
.collect(JsonCollectors.valuesToArray())))
.collect(JsonCollectors.fieldsToObject());
}
/**
* Transform the passed {@code jsonObject} to a map of deleted subjectIds as expected in the payload of this event.
*
* @param jsonObject the json object to read the modified subjects from.
* @return the map.
*/
public static Map<Label, Collection<SubjectId>> deletedSubjectsFromJson(final JsonObject jsonObject) {
final Map<Label, Collection<SubjectId>> map = jsonObject.stream()
.collect(Collectors.toMap(field -> Label.of(field.getKeyName()),
field -> field.getValue().asArray().stream()
.map(JsonValue::asString)
.map(SubjectId::newInstance)
.collect(Collectors.toCollection(LinkedHashSet::new)),
(u, v) -> {
throw new IllegalStateException(String.format("Duplicate key %s", u));
},
LinkedHashMap::new));
return Collections.unmodifiableMap(map);
}
}