com.datastax.oss.driver.internal.core.metadata.schema.events.AggregateChangeEvent Maven / Gradle / Ivy
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* distributed with this work for additional information
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* to you 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
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* See the License for the specific language governing permissions and
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package com.datastax.oss.driver.internal.core.metadata.schema.events;
import com.datastax.oss.driver.api.core.metadata.schema.AggregateMetadata;
import com.datastax.oss.driver.internal.core.metadata.schema.SchemaChangeType;
import java.util.Objects;
import net.jcip.annotations.Immutable;
@Immutable
public class AggregateChangeEvent {
public static AggregateChangeEvent dropped(AggregateMetadata oldAggregate) {
return new AggregateChangeEvent(SchemaChangeType.DROPPED, oldAggregate, null);
}
public static AggregateChangeEvent created(AggregateMetadata newAggregate) {
return new AggregateChangeEvent(SchemaChangeType.CREATED, null, newAggregate);
}
public static AggregateChangeEvent updated(
AggregateMetadata oldAggregate, AggregateMetadata newAggregate) {
return new AggregateChangeEvent(SchemaChangeType.UPDATED, oldAggregate, newAggregate);
}
public final SchemaChangeType changeType;
/** {@code null} if the event is a creation */
public final AggregateMetadata oldAggregate;
/** {@code null} if the event is a drop */
public final AggregateMetadata newAggregate;
private AggregateChangeEvent(
SchemaChangeType changeType, AggregateMetadata oldAggregate, AggregateMetadata newAggregate) {
this.changeType = changeType;
this.oldAggregate = oldAggregate;
this.newAggregate = newAggregate;
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
} else if (other instanceof AggregateChangeEvent) {
AggregateChangeEvent that = (AggregateChangeEvent) other;
return this.changeType == that.changeType
&& Objects.equals(this.oldAggregate, that.oldAggregate)
&& Objects.equals(this.newAggregate, that.newAggregate);
} else {
return false;
}
}
@Override
public int hashCode() {
return Objects.hash(changeType, oldAggregate, newAggregate);
}
@Override
public String toString() {
switch (changeType) {
case CREATED:
return String.format("AggregateChangeEvent(CREATED %s)", newAggregate.getSignature());
case UPDATED:
return String.format(
"AggregateChangeEvent(UPDATED %s=>%s)",
oldAggregate.getSignature(), newAggregate.getSignature());
case DROPPED:
return String.format("AggregateChangeEvent(DROPPED %s)", oldAggregate.getSignature());
default:
throw new IllegalStateException("Unsupported change type " + changeType);
}
}
}