package mockit.asm.classes;
   
   import edu.umd.cs.findbugs.annotations.NonNull;
   
   import mockit.asm.constantPool.AttributeWriter;
   import mockit.asm.constantPool.ConstantPoolGeneration;
   import mockit.asm.util.ByteVector;
   
   /**
   * Writes out the interfaces implemented or extended by the class or interface being written.
   */
  final class InterfaceWriter extends AttributeWriter {
      @NonNull
      private final int[] interfaceItemIndices;
  
      InterfaceWriter(@NonNull ConstantPoolGeneration cp, @NonNull String[] interfaceNames) {
          super(cp);
  
          int n = interfaceNames.length;
          int[] cpItemIndices = new int[n];
  
          for (int i = 0; i < n; i++) {
              cpItemIndices[i] = cp.newClass(interfaceNames[i]);
          }
  
          interfaceItemIndices = cpItemIndices;
      }
  
      @Override
      public int getSize() {
          return 2 * interfaceItemIndices.length;
      }
  
      @Override
      public void put(@NonNull ByteVector out) {
          out.putShort(interfaceItemIndices.length);
  
          for (int interfaceItemIndex : interfaceItemIndices) {
              out.putShort(interfaceItemIndex);
          }
      }
  }