private void throwExceptionForNoStackElement(int size, ClassNode targetType, boolean coerce) {
if (size > 0) return;
StringBuilder sb = new StringBuilder();
sb.append("Internal compiler error while compiling ")
.append(controller.getSourceUnit().getName())
.append("\n");
MethodNode methodNode = controller.getMethodNode();
if (methodNode != null) {
sb.append("Method: ");
sb.append(methodNode);
sb.append("\n");
}
ConstructorNode constructorNode = controller.getConstructorNode();
if (constructorNode != null) {
sb.append("Constructor: ");
sb.append(methodNode);
sb.append("\n");
}
sb.append("Line ").append(controller.getLineNumber()).append(",");
sb.append(" expecting ")
.append(coerce ? "coercion" : "casting")
.append(" to ")
.append(targetType.toString(false));
sb.append(" but operand stack is empty");
throw new ArrayIndexOutOfBoundsException(sb.toString());
}
public ClassNode getTopOperand() {
int size = stack.size();
try {
if (size == 0) throw new ArrayIndexOutOfBoundsException("size==0");
} catch (ArrayIndexOutOfBoundsException ai) {
System.err.println("index problem in " + controller.getSourceUnit().getName());
throw ai;
}
return stack.get(size - 1);
}
/** replace top level element with new element of given type */
public void replace(ClassNode type) {
int size = stack.size();
try {
if (size == 0) throw new ArrayIndexOutOfBoundsException("size==0");
} catch (ArrayIndexOutOfBoundsException ai) {
System.err.println("index problem in " + controller.getSourceUnit().getName());
throw ai;
}
stack.set(size - 1, type);
}