CavalliumDBEngine/src/main/java/it/cavallium/dbengine/database/Delta.java
2021-08-29 23:18:03 +02:00

49 lines
1011 B
Java

package it.cavallium.dbengine.database;
import java.util.Objects;
import org.jetbrains.annotations.Nullable;
public class Delta<T> {
private final @Nullable T previous;
private final @Nullable T current;
public Delta(@Nullable T previous, @Nullable T current) {
this.previous = previous;
this.current = current;
}
public boolean isModified() {
return !Objects.equals(previous, current);
}
public @Nullable T previous() {
return previous;
}
public @Nullable T current() {
return current;
}
@Override
public boolean equals(Object obj) {
if (obj == this)
return true;
if (obj == null || obj.getClass() != this.getClass())
return false;
var that = (Delta) obj;
return Objects.equals(this.previous, that.previous) && Objects.equals(this.current, that.current);
}
@Override
public int hashCode() {
return Objects.hash(previous, current);
}
@Override
public String toString() {
return "Delta[" + "previous=" + previous + ", " + "current=" + current + ']';
}
}