public String getLabelExpression(Field field) {
Expression label = field.getLabel();
if (label == null) return null;
StringBuilder builder = new StringBuilder();
AST labelBase = label.getNextSibling();
if (labelBase != null) {
String name = labelBase.getText();
builder.append("((");
builder.append(name);
builder.append(")__cc.find(\"");
builder.append(name);
builder.append("\")).");
}
builder.append("__fpos + 8*");
String labelExpr = exprEmitter.emit(label);
builder.append(labelExpr);
return builder.toString();
}
/**
* Recursively traverses a label expression to construct the setter name for the label. We rely
* on the results of the ExpressionEvaluator in assuming that the expression type is either DOT
* or ID, and that an ID always resolved to a Field in the expression scope.
*
* @param buffer string buffer used for appending the partial result
* @param expr subexpression of current label expression
*/
private void appendLabelSetter(StringBuilder buffer, Expression expr) {
if (expr.getType() == DataScriptParserTokenTypes.DOT) {
Expression op1 = expr.op1();
String symbol = op1.getText();
Field f = (Field) op1.getScope().getTypeOrSymbol(symbol);
String getter = AccessorNameEmitter.getGetterName(f);
buffer.append(getter);
buffer.append("().");
appendLabelSetter(buffer, expr.op2());
} else {
Field f = (Field) expr.getScope().getTypeOrSymbol(expr.getText());
buffer.append(AccessorNameEmitter.getSetterName(f));
}
}