29 import com.sun.jdi.InvalidTypeException;
  30 import com.sun.jdi.Value;
  31 import com.sun.jdi.VirtualMachine;
  32 
  33 abstract class ValueImpl extends MirrorImpl implements Value {
  34 
  35     ValueImpl(VirtualMachine aVm) {
  36         super(aVm);
  37     }
  38 
  39     static ValueImpl prepareForAssignment(Value value,
  40                                           ValueContainer destination)
  41                   throws InvalidTypeException, ClassNotLoadedException {
  42         if (value == null) {
  43             /*
  44              * TO DO: Centralize JNI signature knowledge
  45              */
  46             if (destination.signature().length() == 1) {
  47                 throw new InvalidTypeException("Can't set a primitive type to null");
  48             }



  49             return null;    // no further checking or conversion necessary
  50         } else {
  51             return ((ValueImpl)value).prepareForAssignmentTo(destination);
  52         }
  53     }
  54 
  55     static byte typeValueKey(Value val) {
  56         if (val == null) {
  57             return JDWP.Tag.OBJECT;
  58         } else {
  59             return ((ValueImpl)val).typeValueKey();
  60         }
  61     }
  62 
  63     abstract ValueImpl prepareForAssignmentTo(ValueContainer destination)
  64                  throws InvalidTypeException, ClassNotLoadedException;
  65 
  66     abstract byte typeValueKey();
  67 }

  29 import com.sun.jdi.InvalidTypeException;
  30 import com.sun.jdi.Value;
  31 import com.sun.jdi.VirtualMachine;
  32 
  33 abstract class ValueImpl extends MirrorImpl implements Value {
  34 
  35     ValueImpl(VirtualMachine aVm) {
  36         super(aVm);
  37     }
  38 
  39     static ValueImpl prepareForAssignment(Value value,
  40                                           ValueContainer destination)
  41                   throws InvalidTypeException, ClassNotLoadedException {
  42         if (value == null) {
  43             /*
  44              * TO DO: Centralize JNI signature knowledge
  45              */
  46             if (destination.signature().length() == 1) {
  47                 throw new InvalidTypeException("Can't set a primitive type to null");
  48             }
  49             if (destination.signature().charAt(0) == 'Q') {
  50                 throw new InvalidTypeException("Can't set an inline type to null");
  51             }
  52             return null;    // no further checking or conversion necessary
  53         } else {
  54             return ((ValueImpl)value).prepareForAssignmentTo(destination);
  55         }
  56     }
  57 
  58     static byte typeValueKey(Value val) {
  59         if (val == null) {
  60             return JDWP.Tag.OBJECT;
  61         } else {
  62             return ((ValueImpl)val).typeValueKey();
  63         }
  64     }
  65 
  66     abstract ValueImpl prepareForAssignmentTo(ValueContainer destination)
  67                  throws InvalidTypeException, ClassNotLoadedException;
  68 
  69     abstract byte typeValueKey();
  70 }