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176 lines (151 loc) · 3.92 KB
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/**
* Provides classes for working with JSON data.
*/
import javascript
/**
* A JSON-encoded value, which may be a primitive value, an array or an object.
*
* Examples:
*
* ```
* null
* true
* false
* 42
* "a string"
* [ 1, 2, 3 ]
* { "value": 0 }
* ```
*/
class JSONValue extends @json_value, Locatable {
override Location getLocation() { json_locations(this, result) }
/** Gets the parent value to which this value belongs, if any. */
JSONValue getParent() { json(this, _, result, _, _) }
/** Gets the `i`th child value of this value. */
JSONValue getChild(int i) { json(result, _, this, i, _) }
/** Holds if this JSON value is the top level element in its enclosing file. */
predicate isTopLevel() { not exists(getParent()) }
override string toString() { json(this, _, _, _, result) }
/** Gets the JSON file containing this value. */
File getJsonFile() {
exists(Location loc |
json_locations(this, loc) and
result = loc.getFile()
)
}
/** If this is an object, gets the value of property `name`. */
JSONValue getPropValue(string name) { json_properties(this, name, result) }
/** If this is an array, gets the value of the `i`th element. */
JSONValue getElementValue(int i) { result = this.(JSONArray).getChild(i) }
/** If this is a string constant, gets the value of the string. */
string getStringValue() { result = this.(JSONString).getValue() }
/** If this is an integer constant, gets its numeric value. */
int getIntValue() { result = this.(JSONNumber).getValue().toInt() }
/** If this is a boolean constant, gets its boolean value. */
boolean getBooleanValue() { result.toString() = this.(JSONBoolean).getValue() }
override string getAPrimaryQlClass() { result = "JSONValue" }
}
/**
* A JSON-encoded primitive value.
*
* Examples:
*
* ```
* null
* true
* false
* 42
* "a string"
* ```
*/
abstract class JSONPrimitiveValue extends JSONValue {
/** Gets a string representation of the encoded value. */
string getValue() { json_literals(result, _, this) }
/** Gets the source text of the encoded value; for strings, this includes quotes. */
string getRawValue() { json_literals(_, result, this) }
}
/**
* A JSON-encoded null value.
*
* Example:
*
* ```
* null
* ```
*/
class JSONNull extends @json_null, JSONPrimitiveValue {
override string getAPrimaryQlClass() { result = "JSONNull" }
}
/**
* A JSON-encoded Boolean value.
*
* Examples:
*
* ```
* true
* false
* ```
*/
class JSONBoolean extends @json_boolean, JSONPrimitiveValue {
override string getAPrimaryQlClass() { result = "JSONBoolean" }
}
/**
* A JSON-encoded number.
*
* Examples:
*
* ```
* 42
* 1.0
* ```
*/
class JSONNumber extends @json_number, JSONPrimitiveValue {
override string getAPrimaryQlClass() { result = "JSONNumber" }
}
/**
* A JSON-encoded string value.
*
* Example:
*
* ```
* "a string"
* ```
*/
class JSONString extends @json_string, JSONPrimitiveValue {
override string getAPrimaryQlClass() { result = "JSONString" }
}
/**
* A JSON-encoded array.
*
* Example:
*
* ```
* [ 1, 2, 3 ]
* ```
*/
class JSONArray extends @json_array, JSONValue {
override string getAPrimaryQlClass() { result = "JSONArray" }
/** Gets the string value of the `i`th element of this array. */
string getElementStringValue(int i) { result = getElementValue(i).getStringValue() }
}
/**
* A JSON-encoded object.
*
* Example:
*
* ```
* { "value": 0 }
* ```
*/
class JSONObject extends @json_object, JSONValue {
override string getAPrimaryQlClass() { result = "JSONObject" }
/** Gets the string value of property `name` of this object. */
string getPropStringValue(string name) { result = getPropValue(name).getStringValue() }
}
/**
* An error reported by the JSON parser.
*/
class JSONParseError extends @json_parse_error, Error {
override Location getLocation() { json_locations(this, result) }
override string getMessage() { json_errors(this, result) }
}