32 lines
494 B
Java
32 lines
494 B
Java
package dev.kske.undoredo;
|
|
|
|
/**
|
|
* @author Kai S. K. Engelbart
|
|
* @since 0.0.1
|
|
*/
|
|
class IntChange implements Change {
|
|
|
|
private final IntWrapper wrapper;
|
|
private final int value;
|
|
|
|
IntChange(IntWrapper wrapper, int value) {
|
|
this.wrapper = wrapper;
|
|
this.value = value;
|
|
}
|
|
|
|
@Override
|
|
public void apply() {
|
|
wrapper.value += value;
|
|
}
|
|
|
|
@Override
|
|
public Change invert() {
|
|
return new IntChange(wrapper, -value);
|
|
}
|
|
|
|
@Override
|
|
public boolean isIdentity() {
|
|
return value == 0;
|
|
}
|
|
}
|