org.htmlunit.xpath.xml.utils.XMLCharacterRecognizer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of htmlunit-xpath Show documentation

The XPath engine used by HtmlUnit.

There is a newer version: 4.7.0

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 org.htmlunit.xpath.xml.utils;

/**
 * Class used to verify whether the specified ch conforms to the XML 1.0 definition of
 * whitespace.
 */
public class XMLCharacterRecognizer {

  /**
   * Returns whether the specified ch conforms to the XML 1.0 definition of whitespace.
   * Refer to the definition of S
   *  for details.
   *
   * @param ch Character to check as XML whitespace.
   * @return =true if ch is XML whitespace; otherwise =false.
   */
  public static boolean isWhiteSpace(final char ch) {
    return (ch == 0x20) || (ch == 0x09) || (ch == 0xD) || (ch == 0xA);
  }

  /**
   * Tell if the string is whitespace.
   *
   * @param chars CharSequence to check as XML whitespace.
   * @return True if characters in buffer are XML whitespace, false otherwise
   */
  public static boolean isWhiteSpace(final CharSequence chars) {
    return chars.chars().allMatch(i -> XMLCharacterRecognizer.isWhiteSpace((char) i));
  }
}