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SubjectModified.java
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SubjectModified.java
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/*
* Copyright (c) 2017 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.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;
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.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.PoliciesModelFactory;
import org.eclipse.ditto.policies.model.PolicyId;
import org.eclipse.ditto.policies.model.Subject;
/**
* This event is emitted after a {@link org.eclipse.ditto.policies.model.Subject} was modified.
*/
@Immutable
@JsonParsableEvent(name = SubjectModified.NAME, typePrefix = PolicyEvent.TYPE_PREFIX)
public final class SubjectModified extends AbstractPolicyActionEvent<SubjectModified> {
/**
* Name of this event
*/
public static final String NAME = "subjectModified";
/**
* Type of this event.
*/
public static final String TYPE = TYPE_PREFIX + NAME;
static final JsonFieldDefinition<String> JSON_LABEL =
JsonFactory.newStringFieldDefinition("label", FieldType.REGULAR, JsonSchemaVersion.V_2);
static final JsonFieldDefinition<String> JSON_SUBJECT_ID =
JsonFactory.newStringFieldDefinition("subjectId", FieldType.REGULAR, JsonSchemaVersion.V_2);
static final JsonFieldDefinition<JsonObject> JSON_SUBJECT =
JsonFactory.newJsonObjectFieldDefinition("subject", FieldType.REGULAR, JsonSchemaVersion.V_2);
private final Label label;
private final Subject subject;
private SubjectModified(final PolicyId policyId,
final Label label,
final Subject subject,
final long revision,
@Nullable final Instant timestamp,
final DittoHeaders dittoHeaders,
@Nullable final Metadata metadata) {
super(TYPE, checkNotNull(policyId, "Policy identifier"), revision, timestamp, dittoHeaders, metadata);
this.label = checkNotNull(label, "Label");
this.subject = checkNotNull(subject, "Subject");
}
/**
* Constructs a new {@code SubjectModified} object.
*
* @param policyId the identifier of the Policy to which the modified subject belongs.
* @param label the label of the Policy Entry to which the modified subject belongs.
* @param subject the modified {@link org.eclipse.ditto.policies.model.Subject}.
* @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 SubjectModified.
* @throws NullPointerException if any argument but {@code timestamp} is {@code null}.
*/
public static SubjectModified of(final PolicyId policyId,
final Label label,
final Subject subject,
final long revision,
@Nullable final Instant timestamp,
final DittoHeaders dittoHeaders,
@Nullable final Metadata metadata) {
return new SubjectModified(policyId, label, subject, revision, timestamp, dittoHeaders, metadata);
}
/**
* Creates a new {@code SubjectModified} from a JSON string.
*
* @param jsonString the JSON string from which a new SubjectModified instance is to be created.
* @param dittoHeaders the headers of the command which was the cause of this event.
* @return the {@code SubjectModified} which was created from the given JSON string.
* @throws NullPointerException if {@code jsonString} is {@code null}.
* @throws org.eclipse.ditto.json.JsonParseException if the passed in {@code jsonString} was not in the expected
* 'SubjectModified' format.
*/
public static SubjectModified fromJson(final String jsonString, final DittoHeaders dittoHeaders) {
return fromJson(JsonFactory.newObject(jsonString), dittoHeaders);
}
/**
* Creates a new {@code SubjectModified} from a JSON object.
*
* @param jsonObject the JSON object from which a new SubjectModified instance is to be created.
* @param dittoHeaders the headers of the command which was the cause of this event.
* @return the {@code SubjectModified} 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
* 'SubjectModified' format.
*/
public static SubjectModified fromJson(final JsonObject jsonObject, final DittoHeaders dittoHeaders) {
return new EventJsonDeserializer<SubjectModified>(TYPE, jsonObject).deserialize(
(revision, timestamp, metadata) -> {
final String extractedPolicyId = jsonObject.getValueOrThrow(PolicyEvent.JsonFields.POLICY_ID);
final PolicyId policyId = PolicyId.of(extractedPolicyId);
final Label label = Label.of(jsonObject.getValueOrThrow(JSON_LABEL));
final String subjectId = jsonObject.getValueOrThrow(JSON_SUBJECT_ID);
final JsonObject subjectJsonObject = jsonObject.getValueOrThrow(JSON_SUBJECT);
final Subject extractedModifiedSubject =
PoliciesModelFactory.newSubject(subjectId, subjectJsonObject);
return of(policyId, label, extractedModifiedSubject, revision, timestamp, dittoHeaders, metadata);
});
}
/**
* Returns the label of the Policy Entry to which the modified subject belongs.
*
* @return the label
*/
public Label getLabel() {
return label;
}
/**
* Returns the modified {@link org.eclipse.ditto.policies.model.Subject}.
*
* @return the modified {@link org.eclipse.ditto.policies.model.Subject}.
*/
public Subject getSubject() {
return subject;
}
@Override
public Optional<JsonValue> getEntity(final JsonSchemaVersion schemaVersion) {
return Optional.of(subject.toJson(schemaVersion, FieldType.regularOrSpecial()));
}
@Override
public JsonPointer getResourcePath() {
final String path = "/entries/" + label + "/subjects/" + subject.getId();
return JsonPointer.of(path);
}
@Override
public SubjectModified setRevision(final long revision) {
return of(getPolicyEntityId(), label, subject, revision, getTimestamp().orElse(null), getDittoHeaders(),
getMetadata().orElse(null));
}
@Override
public SubjectModified setDittoHeaders(final DittoHeaders dittoHeaders) {
return of(getPolicyEntityId(), label, subject, 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_LABEL, label.toString(), predicate);
jsonObjectBuilder.set(JSON_SUBJECT_ID, subject.getId().toString(), predicate);
jsonObjectBuilder.set(JSON_SUBJECT, subject.toJson(schemaVersion, thePredicate), predicate);
}
@Override
public SubjectsModifiedPartially aggregateWith(final Collection<PolicyActionEvent<?>> otherPolicyActionEvents) {
final Map<Label, Collection<Subject>> initialModifiedSubjects =
Stream.of(0).collect(Collectors.toMap(i -> label, i -> Collections.singleton(subject),
(u, v) -> {
throw new IllegalStateException(String.format("Duplicate key %s", u));
},
LinkedHashMap::new));
return aggregateWithSubjectCreatedOrModified(initialModifiedSubjects, otherPolicyActionEvents);
}
@SuppressWarnings("squid:S109")
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + Objects.hashCode(label);
result = prime * result + Objects.hashCode(subject);
return result;
}
@SuppressWarnings("squid:MethodCyclomaticComplexity")
@Override
public boolean equals(@Nullable final Object o) {
if (this == o) {
return true;
}
if (null == o || getClass() != o.getClass()) {
return false;
}
final SubjectModified that = (SubjectModified) o;
return that.canEqual(this) && Objects.equals(label, that.label) && Objects.equals(subject, that.subject) &&
super
.equals(that);
}
@Override
protected boolean canEqual(@Nullable final Object other) {
return other instanceof SubjectModified;
}
@Override
public String toString() {
return getClass().getSimpleName() + " [" + super.toString() + ", label=" + label + ", subject=" + subject + "]";
}
}