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   /*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project licenses this file to you 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 io.netty.handler.codec.http.multipart;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.handler.codec.http.HttpConstants;
  
  import java.io.IOException;
  import java.nio.charset.Charset;
  
  /**
   * Mixed implementation using both in Memory and in File with a limit of size
   */
  public class MixedAttribute extends AbstractMixedHttpData<Attribute> implements Attribute {
      public MixedAttribute(String name, long limitSize) {
          this(name, limitSize, HttpConstants.DEFAULT_CHARSET);
      }
  
      public MixedAttribute(String name, long definedSize, long limitSize) {
          this(name, definedSize, limitSize, HttpConstants.DEFAULT_CHARSET);
      }
  
      public MixedAttribute(String name, long limitSize, Charset charset) {
          this(name, limitSize, charset, DiskAttribute.baseDirectory, DiskAttribute.deleteOnExitTemporaryFile);
      }
  
      public MixedAttribute(String name, long limitSize, Charset charset, String baseDir, boolean deleteOnExit) {
          this(name, 0, limitSize, charset, baseDir, deleteOnExit);
      }
  
      public MixedAttribute(String name, long definedSize, long limitSize, Charset charset) {
          this(name, definedSize, limitSize, charset,
                  DiskAttribute.baseDirectory, DiskAttribute.deleteOnExitTemporaryFile);
      }
  
      public MixedAttribute(String name, long definedSize, long limitSize, Charset charset,
                            String baseDir, boolean deleteOnExit) {
          super(limitSize, baseDir, deleteOnExit,
                  new MemoryAttribute(name, definedSize, charset));
      }
  
      public MixedAttribute(String name, String value, long limitSize) {
          this(name, value, limitSize, HttpConstants.DEFAULT_CHARSET,
                  DiskAttribute.baseDirectory, DiskFileUpload.deleteOnExitTemporaryFile);
      }
  
      public MixedAttribute(String name, String value, long limitSize, Charset charset) {
          this(name, value, limitSize, charset,
                  DiskAttribute.baseDirectory, DiskFileUpload.deleteOnExitTemporaryFile);
      }
  
      private static Attribute makeInitialAttributeFromValue(String name, String value, long limitSize, Charset charset,
                                                             String baseDir, boolean deleteOnExit) {
          if (value.length() > limitSize) {
              try {
                  return new DiskAttribute(name, value, charset, baseDir, deleteOnExit);
              } catch (IOException e) {
                  // revert to Memory mode
                  try {
                      return new MemoryAttribute(name, value, charset);
                  } catch (IOException ignore) {
                      throw new IllegalArgumentException(e);
                  }
              }
          } else {
              try {
                  return new MemoryAttribute(name, value, charset);
              } catch (IOException e) {
                  throw new IllegalArgumentException(e);
              }
          }
      }
  
      public MixedAttribute(String name, String value, long limitSize, Charset charset,
                            String baseDir, boolean deleteOnExit) {
          super(limitSize, baseDir, deleteOnExit,
                  makeInitialAttributeFromValue(name, value, limitSize, charset, baseDir, deleteOnExit));
      }
  
      @Override
      public String getValue() throws IOException {
          return wrapped.getValue();
      }
  
      @Override
      public void setValue(String value) throws IOException {
         wrapped.setValue(value);
     }
 
     @Override
     Attribute makeDiskData() {
         DiskAttribute diskAttribute = new DiskAttribute(getName(), definedLength(), baseDir, deleteOnExit);
         diskAttribute.setMaxSize(getMaxSize());
         return diskAttribute;
     }
 
     @Override
     public Attribute copy() {
         // for binary compatibility
         return super.copy();
     }
 
     @Override
     public Attribute duplicate() {
         // for binary compatibility
         return super.duplicate();
     }
 
     @Override
     public Attribute replace(ByteBuf content) {
         // for binary compatibility
         return super.replace(content);
     }
 
     @Override
     public Attribute retain() {
         // for binary compatibility
         return super.retain();
     }
 
     @Override
     public Attribute retain(int increment) {
         // for binary compatibility
         return super.retain(increment);
     }
 
     @Override
     public Attribute retainedDuplicate() {
         // for binary compatibility
         return super.retainedDuplicate();
     }
 
     @Override
     public Attribute touch() {
         // for binary compatibility
         return super.touch();
     }
 
     @Override
     public Attribute touch(Object hint) {
         // for binary compatibility
         return super.touch(hint);
     }
 }