com.datastax.oss.driver.internal.core.metadata.schema.events.ViewChangeEvent Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* 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
* 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.
*/
package com.datastax.oss.driver.internal.core.metadata.schema.events;
import com.datastax.oss.driver.api.core.metadata.schema.ViewMetadata;
import com.datastax.oss.driver.internal.core.metadata.schema.SchemaChangeType;
import java.util.Objects;
import net.jcip.annotations.Immutable;
@Immutable
public class ViewChangeEvent {
public static ViewChangeEvent dropped(ViewMetadata oldView) {
return new ViewChangeEvent(SchemaChangeType.DROPPED, oldView, null);
}
public static ViewChangeEvent created(ViewMetadata newView) {
return new ViewChangeEvent(SchemaChangeType.CREATED, null, newView);
}
public static ViewChangeEvent updated(ViewMetadata oldView, ViewMetadata newView) {
return new ViewChangeEvent(SchemaChangeType.UPDATED, oldView, newView);
}
public final SchemaChangeType changeType;
/** {@code null} if the event is a creation */
public final ViewMetadata oldView;
/** {@code null} if the event is a drop */
public final ViewMetadata newView;
private ViewChangeEvent(SchemaChangeType changeType, ViewMetadata oldView, ViewMetadata newView) {
this.changeType = changeType;
this.oldView = oldView;
this.newView = newView;
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
} else if (other instanceof ViewChangeEvent) {
ViewChangeEvent that = (ViewChangeEvent) other;
return this.changeType == that.changeType
&& Objects.equals(this.oldView, that.oldView)
&& Objects.equals(this.newView, that.newView);
} else {
return false;
}
}
@Override
public int hashCode() {
return Objects.hash(changeType, oldView, newView);
}
@Override
public String toString() {
switch (changeType) {
case CREATED:
return String.format("ViewChangeEvent(CREATED %s)", newView.getName());
case UPDATED:
return String.format(
"ViewChangeEvent(UPDATED %s=>%s)", oldView.getName(), newView.getName());
case DROPPED:
return String.format("ViewChangeEvent(DROPPED %s)", oldView.getName());
default:
throw new IllegalStateException("Unsupported change type " + changeType);
}
}
}