/**
* Make a JSON text of an Object value. If the object has an value.toJSONString() method, then
* that method will be used to produce the JSON text. The method is required to produce a strictly
* conforming text. If the object does not contain a toJSONString method (which is the most common
* case), then a text will be produced by other means. If the value is an array or Collection,
* then a JSONArray will be made from it and its toJSONString method will be called. If the value
* is a MAP, then a JSONObject will be made from it and its toJSONString method will be called.
* Otherwise, the value's toString method will be called, and the result will be quoted.
*
* <p>Warning: This method assumes that the data structure is acyclical.
*
* @param value The value to be serialized.
* @return a printable, displayable, transmittable representation of the object, beginning with
* <code>{</code> <small>(left brace)</small> and ending with <code>}</code>
* <small>(right brace)</small>.
* @throws JSONException If the value is or contains an invalid number.
*/
public static String valueToString(Object value) throws JSONException {
if ((value == null) || value.equals(null)) {
return "null";
}
if (value instanceof JSONString) {
Object object;
try {
object = ((JSONString) value).toJSONString();
} catch (final Exception e) {
throw new JSONException(e);
}
if (object instanceof String) {
return (String) object;
}
throw new JSONException("Bad value from toJSONString: " + object);
}
if (value instanceof Number) {
return JSONObject.numberToString((Number) value);
}
if ((value instanceof Boolean)
|| (value instanceof JSONObject)
|| (value instanceof JSONArray)) {
return value.toString();
}
if (value instanceof Map) {
return new JSONObject((Map) value).toString();
}
if (value instanceof Collection) {
return new JSONArray((Collection) value).toString();
}
if (value.getClass().isArray()) {
return new JSONArray(value).toString();
}
return JSONObject.quote(value.toString());
}
/**
* Encodes {@code value}.
*
* @param value a {@link JSONObject}, {@link JSONArray}, String, Boolean, Integer, Long, Double or
* null. May not be {@link Double#isNaN() NaNs} or {@link Double#isInfinite() infinities}.
* @return this stringer.
*/
public JSONStringer value(Object value) throws JSONException {
if (stack.isEmpty()) {
throw new JSONException("Nesting problem");
}
if (value instanceof JSONArray) {
((JSONArray) value).writeTo(this);
return this;
} else if (value instanceof JSONObject) {
((JSONObject) value).writeTo(this);
return this;
}
beforeValue();
if (value == null || value instanceof Boolean || value == JSONObject.NULL) {
out.append(value);
} else if (value instanceof Number) {
out.append(JSONObject.numberToString((Number) value));
} else {
string(value.toString());
}
return this;
}
/**
* Encodes {@code value} to this stringer.
*
* @param value a finite value. May not be {@link Double#isNaN() NaNs} or {@link
* Double#isInfinite() infinities}.
* @return this stringer.
*/
public JSONStringer value(double value) throws JSONException {
if (stack.isEmpty()) {
throw new JSONException("Nesting problem");
}
beforeValue();
out.append(JSONObject.numberToString(value));
return this;
}
public static String getJsonRepresentation(Object value) throws JSONException {
if (value == null || value.equals(null)) {
return "null";
}
if (value instanceof FString) {
return JSONObject.quote(value.toString());
}
if (value instanceof YailList) {
return ((YailList) value).toJSONString();
}
// The Json tokener used in getOnjectFromJson cannot handle
// fractions. So we Json encode fractions by first converting
// them to doubles. This is an example of value with Kawa type any
// being exposed to the rest of App Inventor by the value being
// passed to a compoent method, in this case TinyDB or TinyWebDB
// StoreValue. See the "warning" comment in runtime.scm at
// call-component-method.
if (value instanceof IntFraction) {
return JSONObject.numberToString((Number) ((IntFraction) value).doubleValue());
}
if (value instanceof Number) {
return JSONObject.numberToString((Number) value);
}
if (value instanceof Boolean) {
return value.toString();
}
if (value.getClass().isArray()) {
StringBuilder sb = new StringBuilder();
sb.append("[");
String separator = "";
for (Object o : (Object[]) value) {
sb.append(separator).append(getJsonRepresentation(o));
separator = ",";
}
sb.append("]");
return sb.toString();
}
return JSONObject.quote(value.toString());
}
/**
* Make a prettyprinted JSON text of an object value.
*
* <p>Warning: This method assumes that the data structure is acyclical.
*
* @param value The value to be serialized.
* @param indentFactor The number of spaces to add to each level of indentation.
* @param indent The indentation of the top level.
* @return a printable, displayable, transmittable representation of the object, beginning with
* <code>{</code> <small>(left brace)</small> and ending with <code>}</code>
* <small>(right brace)</small>.
* @throws JSONException If the object contains an invalid number.
*/
static String valueToString(Object value, int indentFactor, int indent) throws JSONException {
if ((value == null) || value.equals(null)) {
return "null";
}
try {
if (value instanceof JSONString) {
final Object o = ((JSONString) value).toJSONString();
if (o instanceof String) {
return (String) o;
}
}
} catch (final Exception ignore) {
}
if (value instanceof Number) {
return JSONObject.numberToString((Number) value);
}
if (value instanceof Boolean) {
return value.toString();
}
if (value instanceof JSONObject) {
return ((JSONObject) value).toString(indentFactor, indent);
}
if (value instanceof JSONArray) {
return ((JSONArray) value).toString(indentFactor, indent);
}
if (value instanceof Map) {
return new JSONObject((Map) value).toString(indentFactor, indent);
}
if (value instanceof Collection) {
return new JSONArray((Collection) value).toString(indentFactor, indent);
}
if (value.getClass().isArray()) {
return new JSONArray(value).toString(indentFactor, indent);
}
return JSONObject.quote(value.toString());
}