feign.form.multipart.SingleFileWriter Maven / Gradle / Ivy

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/*
 * Copyright 2017 Artem Labazin .
 *
 * 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 feign.form.multipart;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import lombok.val;

/**
 *
 * @author Artem Labazin 
 */
public class SingleFileWriter extends AbstractWriter {

  @Override
  public boolean isApplicable (Object value) {
    return value != null && value instanceof File;
  }

  @Override
  protected void write (Output output, String key, Object value) throws Exception {
    val file = (File) value;
    writeFileMetadata(output, key, file.getName(), null);

    InputStream input = null;
    try {
      input = new FileInputStream(file);
      val buf = new byte[1024];
      int length;
      while ((length = input.read(buf)) > 0) {
        output.write(buf, 0, length);
      }
    } finally {
      if (input != null) {
        input.close();
      }
    }
  }
}