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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,
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* 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.TableMetadata;
import com.datastax.oss.driver.internal.core.metadata.schema.SchemaChangeType;
import java.util.Objects;
import net.jcip.annotations.Immutable;
@Immutable
public class TableChangeEvent {
public static TableChangeEvent dropped(TableMetadata oldTable) {
return new TableChangeEvent(SchemaChangeType.DROPPED, oldTable, null);
}
public static TableChangeEvent created(TableMetadata newTable) {
return new TableChangeEvent(SchemaChangeType.CREATED, null, newTable);
}
public static TableChangeEvent updated(TableMetadata oldTable, TableMetadata newTable) {
return new TableChangeEvent(SchemaChangeType.UPDATED, oldTable, newTable);
}
public final SchemaChangeType changeType;
/** {@code null} if the event is a creation */
public final TableMetadata oldTable;
/** {@code null} if the event is a drop */
public final TableMetadata newTable;
private TableChangeEvent(
SchemaChangeType changeType, TableMetadata oldTable, TableMetadata newTable) {
this.changeType = changeType;
this.oldTable = oldTable;
this.newTable = newTable;
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
} else if (other instanceof TableChangeEvent) {
TableChangeEvent that = (TableChangeEvent) other;
return this.changeType == that.changeType
&& Objects.equals(this.oldTable, that.oldTable)
&& Objects.equals(this.newTable, that.newTable);
} else {
return false;
}
}
@Override
public int hashCode() {
return Objects.hash(changeType, oldTable, newTable);
}
@Override
public String toString() {
switch (changeType) {
case CREATED:
return String.format("TableChangeEvent(CREATED %s)", newTable.getName());
case UPDATED:
return String.format(
"TableChangeEvent(UPDATED %s=>%s)", oldTable.getName(), newTable.getName());
case DROPPED:
return String.format("TableChangeEvent(DROPPED %s)", oldTable.getName());
default:
throw new IllegalStateException("Unsupported change type " + changeType);
}
}
}