package mockit.asm.methods;
   
   import edu.umd.cs.findbugs.annotations.NonNull;
   
   import mockit.asm.constantPool.AttributeWriter;
   import mockit.asm.constantPool.ConstantPoolGeneration;
   import mockit.asm.util.ByteVector;
   
   import org.checkerframework.checker.index.qual.NonNegative;
  
  /**
   * Stores the exceptions that can be thrown by a method/constructor, and writes it to the "Exceptions" attribute. For
   * each thrown exception, stores the index of the constant pool item containing the internal name of the thrown
   * exception class.
   */
  final class ExceptionsWriter extends AttributeWriter {
      @NonNull
      private final int[] exceptionIndices;
  
      ExceptionsWriter(@NonNull ConstantPoolGeneration cp, @NonNull String[] exceptionTypeDescs) {
          super(cp, "Exceptions");
          int n = exceptionTypeDescs.length;
          exceptionIndices = new int[n];
  
          for (int i = 0; i < n; i++) {
              exceptionIndices[i] = cp.newClass(exceptionTypeDescs[i]);
          }
      }
  
      @NonNegative
      @Override
      public int getSize() {
          return 8 + 2 * exceptionIndices.length;
      }
  
      @Override
      public void put(@NonNull ByteVector out) {
          int n = exceptionIndices.length;
          put(out, 2 + 2 * n);
          out.putShort(n);
  
          for (int exceptionIndex : exceptionIndices) {
              out.putShort(exceptionIndex);
          }
      }
  }