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Java 1.8+ Library with XML handling routines
There is a newer version: 11.1.8
/*
 * Copyright (C) 2014-2024 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * 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.helger.xml;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.helger.commons.annotation.Nonempty;
import com.helger.commons.string.StringHelper;

/**
 * XML version determinator.
 *
 * @author boris
 */
public enum EXMLVersion
{
  /** XML 1.0 - this should be the default */
  XML_10 ("1.0"),

  /** XML 1.1 */
  XML_11 ("1.1");

  private final String m_sVersion;

  EXMLVersion (@Nonnull @Nonempty final String sVersion)
  {
    m_sVersion = sVersion;
  }

  /**
   * @return The textual representation of the XML version number.
   */
  @Nonnull
  @Nonempty
  public String getVersion ()
  {
    return m_sVersion;
  }

  /**
   * Find the {@link EXMLVersion} object matching the passed version string.
   *
   * @param sVersion
   *        The version string to search. May be null.
   * @return null if no such {@link EXMLVersion} object is present.
   */
  @Nullable
  public static EXMLVersion getFromVersionOrNull (@Nullable final String sVersion)
  {
    return getFromVersionOrDefault (sVersion, null);
  }

  /**
   * Find the {@link EXMLVersion} object matching the passed version string.
   *
   * @param sVersion
   *        The version string to search. May be null.
   * @param eDefault
   *        The default version to be returned, if no such enum value is
   *        present. May be null.
   * @return The provided default version (which may be null) if no
   *         such {@link EXMLVersion} object is present.
   */
  @Nullable
  public static EXMLVersion getFromVersionOrDefault (@Nullable final String sVersion,
                                                     @Nullable final EXMLVersion eDefault)
  {
    if (StringHelper.hasText (sVersion))
      for (final EXMLVersion eVersion : values ())
        if (eVersion.getVersion ().equals (sVersion))
          return eVersion;
    // Not found
    return eDefault;
  }
}