content: /*
   * 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 com.zzzmode.apkeditor.utils;
  
  import java.nio.charset.Charset;
  
  /**
   * Converts String to and from bytes using the encodings required by the Java specification. These encodings are
   * specified in <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">
   * Standard charsets</a>.
   *
   * <p>This class is immutable and thread-safe.</p>
   *
   * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
   * @version $Id$
   * @since 1.4
   */
  public class StringUtils {
  
  
      /**
       * Calls {@link String#getBytes(Charset)}
       *
       * @param string
       *            The string to encode (if null, return null).
       * @param charset
       *            The {@link Charset} to encode the <code>String</code>
       * @return the encoded bytes
       */
      private static byte[] getBytes(final String string, final Charset charset) {
          if (string == null) {
              return null;
          }
          return string.getBytes(charset);
      }
  
  
  
      /**
       * Encodes the given string into a sequence of bytes using the UTF-8 charset, storing the result into a new byte
       * array.
       *
       * @param string
       *            the String to encode, may be <code>null</code>
       * @return encoded bytes, or <code>null</code> if the input string was <code>null</code>
       * @throws NullPointerException
       *             Thrown if {@link Charsets#UTF_8} is not initialized, which should never happen since it is
       *             required by the Java platform specification.
       * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException
       * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
       */
      public static byte[] getBytesUtf8(final String string) {
          return getBytes(string, Charsets.UTF_8);
      }
  
  
      /**
       * Constructs a new <code>String</code> by decoding the specified array of bytes using the given charset.
       *
       * @param bytes
       *            The bytes to be decoded into characters
       * @param charset
       *            The {@link Charset} to encode the <code>String</code>
       * @return A new <code>String</code> decoded from the specified array of bytes using the given charset,
       *         or <code>null</code> if the input byte array was <code>null</code>.
       * @throws NullPointerException
       *             Thrown if {@link Charsets#UTF_8} is not initialized, which should never happen since it is
       *             required by the Java platform specification.
       */
      private static String newString(final byte[] bytes, final Charset charset) {
          return bytes == null ? null : new String(bytes, charset);
      }
  
  
      /**
       * Constructs a new <code>String</code> by decoding the specified array of bytes using the UTF-8 charset.
       *
       * @param bytes
       *            The bytes to be decoded into characters
       * @return A new <code>String</code> decoded from the specified array of bytes using the UTF-8 charset,
       *         or <code>null</code> if the input byte array was <code>null</code>.
       * @throws NullPointerException
       *             Thrown if {@link Charsets#UTF_8} is not initialized, which should never happen since it is
       *             required by the Java platform specification.
       * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException
       */
      public static String newStringUtf8(final byte[] bytes) {
          return newString(bytes, Charsets.UTF_8);
      }
  
  }