com.sun.javafx.fxml.expression.UnaryExpression Maven / Gradle / Ivy
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package com.sun.javafx.fxml.expression;
import java.util.List;
import java.util.function.Function;
/**
* Abstract base class for unary expressions.
*/
public final class UnaryExpression extends Expression {
private final Expression operand;
private final Function evaluator;
public UnaryExpression(Expression operand, Function evaluator) {
if (operand == null) {
throw new NullPointerException();
}
this.operand = operand;
this.evaluator = evaluator;
}
@Override
public T evaluate(Object namespace) {
return evaluator.apply(operand.evaluate(namespace));
}
@Override
public void update(Object namespace, T value) {
throw new UnsupportedOperationException();
}
@Override
public boolean isDefined(Object namespace) {
return operand.isDefined(namespace);
}
@Override
public boolean isLValue() {
return false;
}
@Override
protected void getArguments(List arguments) {
operand.getArguments(arguments);
}
}