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Convenient utility to build XML models by evaluating XPath expressions

There is a newer version: 2.3.9

/*
 * Copyright 2017-2021 Alex Simkin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.simy4.xpath.view;

import com.github.simy4.xpath.XmlBuilderException;
import com.github.simy4.xpath.navigator.Node;

import java.io.Serializable;

public final class BooleanView implements View, Serializable {

  private static final BooleanView FALSE = new BooleanView(false);
  private static final BooleanView TRUE = new BooleanView(true);

  private static final long serialVersionUID = 1L;

  @SuppressWarnings("unchecked")
  public static  BooleanView of(boolean bool) {
    return (BooleanView) (bool ? TRUE : FALSE);
  }

  private final boolean bool;

  private BooleanView(boolean bool) {
    this.bool = bool;
  }

  @Override
  public int compareTo(View other) {
    final boolean thatBool = other.toBoolean();
    return (bool == thatBool) ? 0 : (bool ? 1 : -1);
  }

  @Override
  public boolean toBoolean() {
    return bool;
  }

  @Override
  public double toNumber() {
    return bool ? 1.0 : 0.0;
  }

  @Override
  public String toString() {
    return Boolean.toString(bool);
  }

  @Override
  public  T visit(ViewVisitor visitor) throws XmlBuilderException {
    return visitor.visit(this);
  }

  private Object readResolve() {
    return of(bool);
  }
}