content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org and other contributors.                    ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.image.nimble;
  
  import org.miaixz.bus.image.Tag;
  import org.miaixz.bus.image.galaxy.data.Attributes;
  
  /**
   * @author Kimi Liu
   * @since Java 17+
   */
  public abstract class StoredValue {
  
      public static StoredValue valueOf(Attributes attrs) {
          int bitsStored = attrs.getInt(Tag.BitsStored, 0);
          if (bitsStored == 0)
              bitsStored = attrs.getInt(Tag.BitsAllocated, 8);
          return attrs.getInt(Tag.PixelRepresentation, 0) != 0 ? new Signed(bitsStored) : new Unsigned(bitsStored);
      }
  
      public abstract int valueOf(int pixel);
  
      public abstract int minValue();
  
      public abstract int maxValue();
  
      public static class Unsigned extends StoredValue {
  
          private final int mask;
  
          public Unsigned(int bitsStored) {
              this.mask = (1 << bitsStored) - 1;
          }
  
          @Override
          public int valueOf(int pixel) {
              return pixel & mask;
          }
  
          @Override
          public int minValue() {
              return 0;
          }
  
          @Override
          public int maxValue() {
              return mask;
          }
      }
  
      public static class Signed extends StoredValue {
  
          private final int bitsStored;
          private final int shift;
  
          public Signed(int bitsStored) {
              this.bitsStored = bitsStored;
              this.shift = 32 - bitsStored;
          }
  
          @Override
          public int valueOf(int pixel) {
              return pixel << shift >> shift;
          }
  
          @Override
          public int minValue() {
              return -(1 << (bitsStored - 1));
          }
  
          @Override
          public int maxValue() {
              return (1 << (bitsStored - 1)) - 1;
          }
      }
  
  }
  