Purpose of adding single quote to string value of literal expression

[omarsilva1]

Hi everyone, I would like to know what the purpose is of adding a single quote to the toString method (for LiteralExpressions). I would have expected the return type to be just the value as a string or something like "LiteralExpression: " + value or the value wrapped around single quotes. I got confused when comparing the left expression values of policies (before I realized to cast to LiteralExpression and use value()), I would think others could make the same mistake.

Maybe you can tell me more, @jimmarino?

Connector/spi/common/policy-model/src/main/java/org/eclipse/edc/policy/model/LiteralExpression.java

Lines 36 to 39 in c2bc86f

	@Override
	public String toString() {
	return value + "'";
	}

[jimmarino]

Because toString() returns a representation of the expression, not its typed value. Downcasting and calling value() will return the typed value. The quote should be a wrapped single quote though:

return "'" + value + "'";