Formatters.java

/*
 * *********************************************************************************************************************
 *
 * blueMarine II: Semantic Media Centre
 * http://tidalwave.it/projects/bluemarine2
 *
 * Copyright (C) 2015 - 2021 by Tidalwave s.a.s. (http://tidalwave.it)
 *
 * *********************************************************************************************************************
 *
 * 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.
 *
 * *********************************************************************************************************************
 *
 * git clone https://bitbucket.org/tidalwave/bluemarine2-src
 * git clone https://github.com/tidalwave-it/bluemarine2-src
 *
 * *********************************************************************************************************************
 */
package it.tidalwave.bluemarine2.util;

import java.io.StringReader;
import java.io.StringWriter;
import java.time.Duration;
import java.time.temporal.ChronoUnit;
import java.util.Base64;
import javax.annotation.Nonnull;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

/***********************************************************************************************************************
 *
 * @author  Fabrizio Giudici
 *
 **********************************************************************************************************************/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class Formatters
  {
    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public static String xmlPrettyPrinted (@Nonnull final String xml)
      {
        try
          {
            final TransformerFactory transformerFactory = TransformerFactory.newInstance();
            transformerFactory.setAttribute("indent-number", 4);
            final Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            final StringWriter out = new StringWriter();
            transformer.transform(new StreamSource(new StringReader(xml)), new StreamResult(out));

            return out.toString();
          }
        catch (TransformerException e)
          {
            throw new RuntimeException(e);
          }
      }

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public static String format (@Nonnull final Duration duration)
      {
        final long s = duration.get(ChronoUnit.SECONDS);
        final long hours = s / 3600;
        final long minutes = (s / 60) % 60;
        final long seconds = s % 60;

        return (hours == 0) ? String.format("%02d:%02d", minutes, seconds)
                            : String.format("%02d:%02d:%02d", hours, minutes, seconds);
      }

    /*******************************************************************************************************************
     *
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public static String toHexString (@Nonnull final byte[] bytes)
      {
        final StringBuilder builder = new StringBuilder();

        for (final byte b : bytes)
          {
            final int value = b & 0xff;
            builder.append(Integer.toHexString(value >>> 4)).append(Integer.toHexString(value & 0x0f));
          }

        return builder.toString();
      }

    /*******************************************************************************************************************
     *
     *
     *
     ******************************************************************************************************************/
    @Nonnull
    public static String toBase64String (@Nonnull final byte[] bytes)
      {
        return  Base64.getUrlEncoder().encodeToString(bytes);
      }
  }