content: /*
   * Copyright 2012-2020 the original author or authors.
   *
   * 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
   *
   *      https://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 org.springframework.boot.convert;
  
  import java.io.IOException;
  
  import org.springframework.boot.origin.Origin;
  import org.springframework.core.convert.converter.Converter;
  import org.springframework.core.io.InputStreamSource;
  import org.springframework.core.io.Resource;
  import org.springframework.util.FileCopyUtils;
  
  /**
   * {@link Converter} to convert from an {@link InputStreamSource} to a {@code byte[]}.
   *
   * @author Phillip Webb
   */
  class InputStreamSourceToByteArrayConverter implements Converter<InputStreamSource, byte[]> {
  
  	@Override
  	public byte[] convert(InputStreamSource source) {
  		try {
  			return FileCopyUtils.copyToByteArray(source.getInputStream());
  		}
  		catch (IOException ex) {
  			throw new IllegalStateException("Unable to read from " + getName(source), ex);
  		}
  	}
  
  	private String getName(InputStreamSource source) {
  		Origin origin = Origin.from(source);
  		if (origin != null) {
  			return origin.toString();
  		}
  		if (source instanceof Resource) {
  			return ((Resource) source).getDescription();
  		}
  		return "input stream source";
  	}
  
  }
  