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Assertj-Swing JUnit4 extension

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/*
 * 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.
 *
 * Copyright 2012-2018 the original author or authors.
 */
package org.assertj.swing.junit.ant;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

import javax.imageio.ImageIO;

import org.apache.commons.codec.binary.Base64;

/**
 * Understands how to decode base64 characters into an image.
 * 
 * @author Alex Ruiz
 */
class ImageDecoder {

  BufferedImage decodeBase64(String encoded) throws IOException {
    ByteArrayInputStream in;
    byte[] toDecode = encoded.getBytes(StandardCharsets.UTF_8);
    in = new ByteArrayInputStream(Base64.decodeBase64(toDecode));
    return ImageIO.read(in);
  }
}