1package io.protobase.f7.models;
 2
 3import com.google.common.base.MoreObjects;
 4
 5/**
 6 * Unary minus operation is the highest precedence operation, and is given a special node. While we could achieve this
 7 * by creating a formula-node that is functionally the same thing, I like the idea of 1) getting specific with out
 8 * node sub-classes, and 2) having something we can render as valid F7 code without mutating the user's input.
 9 */
10public class UnaryMinusOperationNode extends BaseObject implements Node {
11  private Node operand;
12
13  /**
14   * Create new node with an operand.
15   *
16   * @param operand value
17   */
18  public UnaryMinusOperationNode(Node operand) {
19    this.operand = operand;
20  }
21
22  /**
23   * Get the operand node.
24   *
25   * @return node.
26   */
27  public Node getOperand() {
28    return operand;
29  }
30
31  @Override
32  public String toString() {
33    return MoreObjects.toStringHelper(this)
34        .add("operand", operand)
35        .toString();
36  }
37
38  @Override
39  public Object[] significantAttributes() {
40    return new Object[]{
41        operand
42    };
43  }
44}