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package com.github.javaparser.printer.lexicalpreservation.changes;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.observer.ObservableProperty;
/**
* The removal of an element in a list.
*/
public class ListRemovalChange implements Change {
private final ObservableProperty observableProperty;
private final int index;
public ListRemovalChange(ObservableProperty observableProperty, int index) {
this.observableProperty = observableProperty;
this.index = index;
}
@Override
public Object getValue(ObservableProperty property, Node node) {
if (property == observableProperty) {
NodeList<Node> nodeList = new NodeList<>();
Object currentRawValue = new NoChange().getValue(property, node);
if (!(currentRawValue instanceof NodeList)){
throw new IllegalStateException("Expected NodeList, found " + currentRawValue.getClass().getCanonicalName());
}
NodeList<?> currentNodeList = (NodeList<?>)currentRawValue;
nodeList.addAll(currentNodeList);
nodeList.remove(index);
return nodeList;
} else {
return new NoChange().getValue(property, node);
}
}
}
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