Package com.webfirmframework.wffweb.util

Class ByteBufferUtil

java.lang.Object
com.webfirmframework.wffweb.util.ByteBufferUtil
public final class ByteBufferUtil extends Object
Since:
3.0.1

  • Method Details

    • slice

      public static int slice(ByteBuffer data, int maxSliceSize, Slice<ByteBuffer> slice)
      Eg: 
       
 final String s = "1234567890abc";
 final ByteBuffer inputData = ByteBuffer
         .wrap(s.getBytes(StandardCharsets.UTF_8));

 final StringBuilder builder = new StringBuilder();

 final int totalSlices = ByteBufferUtil.slice(inputData, 3,
         (part, last) -> {
             builder.append(
                     new String(part.array(), StandardCharsets.UTF_8));
             return !last;
         });

 System.out.println(s.equals(builder.toString()));
 System.out.println(5 == totalSlices);
      prints 
       true
 true
      Parameters:
      data - ByteBuffer to be sliced
      maxSliceSize - the maximum size of ByteBuffer of the sliced part.
      slice - the Slice functional interface. The method Slice.each must return true to continue slicing.
      Returns:
      the total number of slices made. NB: it is just the count of invocation of Slice.each method. If the Slice.each returned false while the last (second param in Slice.each) is false then the returned slice count will be less than the probable number of slices in the input data.
      Since:
      3.0.1

    • sliceIfRequired

      public static int sliceIfRequired(ByteBuffer data, int maxSliceSize, Slice<ByteBuffer> slice)
      It slices only if required, i.e. if the capacity of input data is equal to the remaining data in the buffer and the capacity is less than or equal to the maxSliceSize then the Slice.each method will reuse the same input data as the first argument.

      Eg: 
       
 final String s = "1234567890abc";
 final ByteBuffer inputData = ByteBuffer
         .wrap(s.getBytes(StandardCharsets.UTF_8));

 final StringBuilder builder = new StringBuilder();

 final int totalSlices = ByteBufferUtil.sliceIfRequired(inputData, 3,
         (part, last) -> {
             builder.append(
                     new String(part.array(), StandardCharsets.UTF_8));
             return !last;
         });

 System.out.println(s.equals(builder.toString()));
 System.out.println(5 == totalSlices);
      prints 
       true
 true
      Parameters:
      data - ByteBuffer to be sliced
      maxSliceSize - the maximum size of ByteBuffer of the sliced part.
      slice - the Slice functional interface. The method Slice.each must return true to continue slicing.
      Returns:
      the total number of slices made. NB: it is just the count of invocation of Slice.each method. If the Slice.each returned false while the last (second param in Slice.each) is false then the returned slice count will be less than the probable number of slices in the input data.
      Since:
      3.0.1

    • merge

      public static ByteBuffer merge(ByteBuffer... dataArray)
      Merges and returns ByteBuffer from the given dataArray. The ByteBuffer will be returned after flip.
      Parameters:
      dataArray - the ByteByffers to merge
      Returns:
      a single ByteBuffer after flip merged from all ByteBuffer objects from dataArray.
      Since:
      3.0.2