/**
* Get FieldDescriptor describing the field accessed by given FieldInstruction.
*
* @param fins a FieldInstruction
* @param cpg ConstantPoolGen for the method containing the FieldInstruction
* @return FieldDescriptor describing the field accessed by given FieldInstruction
*/
public static FieldDescriptor getAccessedFieldDescriptor(
FieldInstruction fins, ConstantPoolGen cpg) {
String className = fins.getClassName(cpg);
String fieldName = fins.getName(cpg);
String fieldSig = fins.getSignature(cpg);
boolean isStatic =
(fins.getOpcode() == Constants.GETSTATIC || fins.getOpcode() == Constants.PUTSTATIC);
return DescriptorFactory.instance()
.getFieldDescriptor(className, fieldName, fieldSig, isStatic);
}
/**
* Look up the field referenced by given FieldInstruction, returning it as an {@link XField
* XField} object.
*
* @param fins the FieldInstruction
* @param cpg the ConstantPoolGen used by the class containing the instruction
* @return an XField object representing the field, or null if no such field could be found
*/
public static XField findXField(FieldInstruction fins, @NonNull ConstantPoolGen cpg)
throws ClassNotFoundException {
String className = fins.getClassName(cpg);
String fieldName = fins.getFieldName(cpg);
String fieldSig = fins.getSignature(cpg);
boolean isStatic =
(fins.getOpcode() == Constants.GETSTATIC || fins.getOpcode() == Constants.PUTSTATIC);
XField xfield = findXField(className, fieldName, fieldSig, isStatic);
short opcode = fins.getOpcode();
if (xfield != null
&& xfield.isResolved()
&& xfield.isStatic() == (opcode == Constants.GETSTATIC || opcode == Constants.PUTSTATIC))
return xfield;
else return null;
}