com.phloc.web.useragent.browser.MobileBrowserManager Maven / Gradle / Ivy

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/**
 * Copyright (C) 2006-2015 phloc systems
 * http://www.phloc.com
 * office[at]phloc[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.phloc.web.useragent.browser;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;

import com.phloc.commons.annotations.PresentForCodeCoverage;
import com.phloc.commons.io.resource.ClassPathResource;
import com.phloc.commons.microdom.reader.XMLListHandler;
import com.phloc.commons.string.StringHelper;

@Immutable
public final class MobileBrowserManager
{
  private static Set  s_aMap = new HashSet  ();

  static
  {
    _readListPhloc ("codelists/mobileuseragents-phloc.xml");
  }

  @PresentForCodeCoverage
  @SuppressWarnings ("unused")
  private static final MobileBrowserManager s_aInstance = new MobileBrowserManager ();

  private MobileBrowserManager ()
  {}

  @Nonnull
  private static String _unify (@Nonnull final String sItem)
  {
    return sItem.toLowerCase (Locale.US);
  }

  private static void _readListPhloc (@Nonnull final String sPath)
  {
    final List  aList = new ArrayList  ();
    if (XMLListHandler.readList (new ClassPathResource (sPath), aList).isFailure ())
      throw new IllegalStateException ("Failed to read " + sPath);
    for (final String sItem : aList)
      s_aMap.add (_unify (sItem));
  }

  @Nullable
  public static String getFromUserAgent (@Nullable final String sFullUserAgent)
  {
    if (StringHelper.hasText (sFullUserAgent))
    {
      final String sUnifiedUA = _unify (sFullUserAgent);
      for (final String sUAPart : s_aMap)
        if (sUnifiedUA.contains (sUAPart))
          return sUAPart;
    }
    return null;
  }
}