/*
    * Copyright 2002-2012 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
    *
    *      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 org.springframework.mock.web.test;
  
  import java.io.ByteArrayInputStream;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.springframework.util.Assert;
  import org.springframework.util.FileCopyUtils;
  import org.springframework.web.multipart.MultipartFile;
  
  /**
   * Mock implementation of the {@link org.springframework.web.multipart.MultipartFile}
   * interface.
   *
   * <p>Useful in conjunction with a {@link MockMultipartHttpServletRequest}
   * for testing application controllers that access multipart uploads.
   *
   * @author Juergen Hoeller
   * @author Eric Crampton
   * @since 2.0
   * @see MockMultipartHttpServletRequest
   */
  public class MockMultipartFile implements MultipartFile {
  
  	private final String name;
  
  	private String originalFilename;
  
  	private String contentType;
  
  	private final byte[] content;
  
  
  	/**
  	 * Create a new MockMultipartFile with the given content.
  	 * @param name the name of the file
  	 * @param content the content of the file
  	 */
  	public MockMultipartFile(String name, byte[] content) {
  		this(name, "", null, content);
  	}
  
  	/**
  	 * Create a new MockMultipartFile with the given content.
  	 * @param name the name of the file
  	 * @param contentStream the content of the file as stream
  	 * @throws IOException if reading from the stream failed
  	 */
  	public MockMultipartFile(String name, InputStream contentStream) throws IOException {
  		this(name, "", null, FileCopyUtils.copyToByteArray(contentStream));
  	}
  
  	/**
  	 * Create a new MockMultipartFile with the given content.
  	 * @param name the name of the file
  	 * @param originalFilename the original filename (as on the client's machine)
  	 * @param contentType the content type (if known)
  	 * @param content the content of the file
  	 */
  	public MockMultipartFile(String name, String originalFilename, String contentType, byte[] content) {
  		Assert.hasLength(name, "Name must not be null");
  		this.name = name;
  		this.originalFilename = (originalFilename != null ? originalFilename : "");
  		this.contentType = contentType;
  		this.content = (content != null ? content : new byte[0]);
  	}
  
  	/**
  	 * Create a new MockMultipartFile with the given content.
  	 * @param name the name of the file
  	 * @param originalFilename the original filename (as on the client's machine)
  	 * @param contentType the content type (if known)
  	 * @param contentStream the content of the file as stream
  	 * @throws IOException if reading from the stream failed
  	 */
  	public MockMultipartFile(String name, String originalFilename, String contentType, InputStream contentStream)
  			throws IOException {
  
  		this(name, originalFilename, contentType, FileCopyUtils.copyToByteArray(contentStream));
  	}
  
  
 	@Override
 	public String getName() {
 		return this.name;
 	}
 
 	@Override
 	public String getOriginalFilename() {
 		return this.originalFilename;
 	}
 
 	@Override
 	public String getContentType() {
 		return this.contentType;
 	}
 
 	@Override
 	public boolean isEmpty() {
 		return (this.content.length == 0);
 	}
 
 	@Override
 	public long getSize() {
 		return this.content.length;
 	}
 
 	@Override
 	public byte[] getBytes() throws IOException {
 		return this.content;
 	}
 
 	@Override
 	public InputStream getInputStream() throws IOException {
 		return new ByteArrayInputStream(this.content);
 	}
 
 	@Override
 	public void transferTo(File dest) throws IOException, IllegalStateException {
 		FileCopyUtils.copy(this.content, dest);
 	}
 
 }