/**
* Inserts any necessary separators and whitespace before a literal value, inline array, or inline
* object. Also adjusts the stack to expect either a closing bracket or another element.
*
* @param root true if the value is a new array or object, the two values permitted as top-level
* elements.
*/
private void beforeValue(boolean root) throws IOException {
switch (peek()) {
case EMPTY_DOCUMENT: // first in document
if (!lenient && !root) {
throw new IllegalStateException("JSON must start with an array or an object.");
}
replaceTop(JsonScope.NONEMPTY_DOCUMENT);
break;
case EMPTY_ARRAY: // first in array
replaceTop(JsonScope.NONEMPTY_ARRAY);
newline();
break;
case NONEMPTY_ARRAY: // another in array
out.append(',');
newline();
break;
case DANGLING_NAME: // value for name
out.append(separator);
replaceTop(JsonScope.NONEMPTY_OBJECT);
break;
case NONEMPTY_DOCUMENT:
throw new IllegalStateException("JSON must have only one top-level value.");
default:
throw new IllegalStateException("Nesting problem: " + stack);
}
}
/**
* Inserts any necessary separators and whitespace before a name. Also adjusts the stack to expect
* the name's value.
*/
private void beforeName() throws IOException {
JsonScope context = peek();
if (context == JsonScope.NONEMPTY_OBJECT) { // first in object
out.write(',');
} else if (context != JsonScope.EMPTY_OBJECT) { // not in an object!
throw new IllegalStateException("Nesting problem: " + stack);
}
newline();
replaceTop(JsonScope.DANGLING_NAME);
}
/** Closes the current scope by appending any necessary whitespace and the given bracket. */
private JsonWriter close(JsonScope empty, JsonScope nonempty, String closeBracket)
throws IOException {
JsonScope context = peek();
if (context != nonempty && context != empty) {
throw new IllegalStateException("Nesting problem: " + stack);
}
stack.remove(stack.size() - 1);
if (context == nonempty) {
newline();
}
out.write(closeBracket);
return this;
}