content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software GmbH & Co. KG, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.util;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.util.Date;
  import java.util.Hashtable;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import org.apache.commons.codec.binary.Base64;
  
  /**
   *
   * Utilities to handle basic data types.<p>
   *
   * @since 6.5.6
   */
  public final class CmsDataTypeUtil {
  
      /**
       * Hides the public constructor.<p>
       */
      private CmsDataTypeUtil() {
  
          // noop
      }
  
      /**
       * Returns the deserialized (if needed) object.<p>
       *
       * @param data the data to deserialize
       * @param type the data type
       *
       * @return the deserialized object
       *
       * @throws IOException if the inputstream fails
       * @throws ClassNotFoundException if the serialized object fails
       */
      public static Object dataDeserialize(byte[] data, String type) throws IOException, ClassNotFoundException {
  
          // check the type of the stored data
          Class<?> clazz = Class.forName(type);
  
          if (isParseable(clazz)) {
              // this is parseable data
              return parse(new String(data), clazz);
          }
  
          // this is a serialized object
          ByteArrayInputStream bin = new ByteArrayInputStream(data);
          ObjectInputStream oin = new ObjectInputStream(bin);
          return oin.readObject();
      }
  
      /**
       * Returns a ready to export string representation of the given object.<p>
       *
       * For not parseable objects, base64 encoded string with the serialized object is generated.<p>
       *
       * @param data the object to export
       *
       * @return the string representation
       *
       * @throws IOException  if something goes wrong
       */
      public static String dataExport(Object data) throws IOException {
  
          if (CmsDataTypeUtil.isParseable(data.getClass())) {
              return CmsDataTypeUtil.format(data);
          }
          ByteArrayOutputStream bout = new ByteArrayOutputStream();
          ObjectOutputStream oout = new ObjectOutputStream(bout);
          oout.writeObject(data);
          oout.close();
          return new String(Base64.encodeBase64(bout.toByteArray()));
      }
  
      /**
       * Returns the import data object.<p>
       *
       * @param value the exported value
       * @param type the expected data type
       *
       * @return the import data object
       *
       * @throws ClassNotFoundException if something goes wrong
       * @throws IOException if something goes wrong
       */
      public static Object dataImport(String value, String type) throws ClassNotFoundException, IOException {
  
          Class<?> clazz = Class.forName(type);
          if (CmsDataTypeUtil.isParseable(clazz)) {
              return CmsDataTypeUtil.parse(value, clazz);
          }
          byte[] data = Base64.decodeBase64(value.getBytes());
          return dataDeserialize(data, type);
      }
  
      /**
       * Serialize the given data.<p>
       *
       * @param data the data to serialize
       *
       * @return byte[] the serailized data
       *
       * @throws IOException if something goes wrong
       */
      public static byte[] dataSerialize(Object data) throws IOException {
  
          if (isParseable(data.getClass())) {
              return format(data).getBytes();
          }
  
          // serialize the data
          ByteArrayOutputStream bout = new ByteArrayOutputStream();
          ObjectOutputStream oout = new ObjectOutputStream(bout);
          Object obj = data;
          if (data instanceof Map) {
              Hashtable<Object, Object> ht = new Hashtable<Object, Object>();
              @SuppressWarnings("unchecked")
              Iterator<Entry<Object, Object>> it = ((Map<Object, Object>)data).entrySet().iterator();
              while (it.hasNext()) {
                  Entry<Object, Object> entry = it.next();
                  if ((entry.getKey() != null) && (entry.getValue() != null)) {
                      ht.put(entry.getKey(), entry.getValue());
                  }
              }
              obj = ht;
          }
          oout.writeObject(obj);
          oout.close();
          return bout.toByteArray();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(boolean data) {
  
          return String.valueOf(data);
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(byte data) {
  
          return Byte.valueOf(data).toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(char data) {
  
          return Character.valueOf(data).toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(Date data) {
  
          return Long.valueOf(data.getTime()).toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(double data) {
  
          return Double.valueOf(data).toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(float data) {
  
          return Float.valueOf(data).toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(int data) {
  
          return Integer.valueOf(data).toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(long data) {
  
          return Long.valueOf(data).toString();
      }
  
      /**
       * Formats the given data into a string value depending on the data type.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(Object data) {
  
          if (data == null) {
              return null;
          }
          Class<?> clazz = data.getClass();
          if (clazz.equals(Date.class)) {
              return format(((Date)data).getTime());
          }
          return data.toString();
      }
  
      /**
       * Formats the given data into a string value.<p>
       *
       * @param data the data to format
       *
       * @return a string representation of the given data
       */
      public static String format(short data) {
  
          return Short.valueOf(data).toString();
      }
  
      /**
       * Checks if the given class is representable as a string.<p>
       *
       * @param clazz the type to test
       *
       * @return if the given class is representable as a string
       */
      public static boolean isParseable(Class<?> clazz) {
  
          boolean parseable = false;
          parseable = parseable || (clazz.equals(byte.class));
          parseable = parseable || (clazz.equals(Byte.class));
          parseable = parseable || (clazz.equals(short.class));
          parseable = parseable || (clazz.equals(Short.class));
          parseable = parseable || (clazz.equals(int.class));
          parseable = parseable || (clazz.equals(Integer.class));
          parseable = parseable || (clazz.equals(long.class));
          parseable = parseable || (clazz.equals(Long.class));
          parseable = parseable || (clazz.equals(float.class));
          parseable = parseable || (clazz.equals(Float.class));
          parseable = parseable || (clazz.equals(double.class));
          parseable = parseable || (clazz.equals(Double.class));
          parseable = parseable || (clazz.equals(boolean.class));
          parseable = parseable || (clazz.equals(Boolean.class));
          parseable = parseable || (clazz.equals(char.class));
          parseable = parseable || (clazz.equals(Character.class));
          parseable = parseable || (clazz.equals(String.class));
          parseable = parseable || (clazz.equals(Date.class));
          parseable = parseable || (clazz.equals(CmsUUID.class));
          return parseable;
      }
  
      /**
       * Converts Number to int.<p>
       *
       * @param n the number object
       *
       * @return Number.inValue(), 0 - if the parameter is null
       */
      public static int numberToInt(Number n) {
  
          return (n == null ? 0 : n.intValue());
      }
  
      /**
       * Returns an object of the given type (or a wrapper for base types)
       * with the value of the given data.<p>
       *
       * @param data the data to parse
       * @param clazz the data type
       *
       * @return the value of the given data
       */
      public static Object parse(String data, Class<?> clazz) {
  
          if (data == null) {
              return null;
          }
          if (clazz.equals(byte.class) || clazz.equals(Byte.class)) {
              return parseByte(data);
          }
          if (clazz.equals(short.class) || clazz.equals(Short.class)) {
              return parseShort(data);
          }
          if (clazz.equals(long.class) || clazz.equals(Long.class)) {
              return parseLong(data);
          }
          if (clazz.equals(int.class) || clazz.equals(Integer.class)) {
              return parseInt(data);
          }
          if (clazz.equals(float.class) || clazz.equals(Float.class)) {
              return parseFloat(data);
          }
          if (clazz.equals(double.class) || clazz.equals(Double.class)) {
              return parseDouble(data);
          }
          if (clazz.equals(boolean.class) || clazz.equals(Boolean.class)) {
              return parseBoolean(data);
          }
          if (clazz.equals(char.class) || clazz.equals(Character.class)) {
              return parseChar(data);
          }
          if (clazz.equals(CmsUUID.class)) {
              return parseUUID(data);
          }
          if (clazz.equals(Date.class)) {
              return parseDate(data);
          }
          return data;
      }
  
      /**
       * Parses the given data as a boolean.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Boolean parseBoolean(String data) {
  
          return Boolean.valueOf(data);
      }
  
      /**
       * Parses the given data as a byte.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Byte parseByte(String data) {
  
          return Byte.valueOf(data);
      }
  
      /**
       * Parses the given data as a char.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Character parseChar(String data) {
  
          return Character.valueOf(data.charAt(0));
      }
  
      /**
       * Parses the given data as a date.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Date parseDate(String data) {
  
          return new Date(parseLong(data).longValue());
      }
  
      /**
       * Parses the given data as a double.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Double parseDouble(String data) {
  
          return Double.valueOf(data);
      }
  
      /**
       * Parses the given data as a float.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Float parseFloat(String data) {
  
          return Float.valueOf(data);
      }
  
      /**
       * Parses the given data as an integer.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Integer parseInt(String data) {
  
          return Integer.valueOf(data);
      }
  
      /**
       * Parses the given data as a long.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Long parseLong(String data) {
  
          return Long.valueOf(data);
      }
  
      /**
       * Parses the given data as a short.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static Short parseShort(String data) {
  
          return Short.valueOf(data);
      }
  
      /**
       * Parses the given data as an uuid.<p>
       *
       * @param data the data to parse
       *
       * @return the converted data value
       */
      public static CmsUUID parseUUID(String data) {
  
          return new CmsUUID(data);
      }
  }
  