private static void readJsonFile() {
try (JsonReader jsonReader =
Json.createReader(
new FileReader(
Paths.get(System.getProperty("user.dir"), "target/myData.json").toString()))) {
JsonStructure jsonStructure = jsonReader.read();
JsonValue.ValueType valueType = jsonStructure.getValueType();
if (valueType == JsonValue.ValueType.OBJECT) {
JsonObject jsonObject = (JsonObject) jsonStructure;
JsonValue firstName = jsonObject.get("firstName");
LOGGER.info("firstName=" + firstName);
JsonValue emailAddresses = jsonObject.get("phoneNumbers");
if (emailAddresses.getValueType() == JsonValue.ValueType.ARRAY) {
JsonArray jsonArray = (JsonArray) emailAddresses;
for (int i = 0; i < jsonArray.size(); i++) {
JsonValue jsonValue = jsonArray.get(i);
LOGGER.info("emailAddress(" + i + "): " + jsonValue);
}
}
} else {
LOGGER.warning("First object is not of type " + JsonValue.ValueType.OBJECT);
}
} catch (FileNotFoundException e) {
LOGGER.severe("Failed to open file: " + e.getMessage());
}
}
public static void dumpJSON(JsonValue tree, String key, String depthPrefix) {
if (key != null) logger.info(depthPrefix + "Key " + key + ": ");
switch (tree.getValueType()) {
case OBJECT:
logger.info(depthPrefix + "OBJECT");
JsonObject object = (JsonObject) tree;
for (String name : object.keySet()) dumpJSON(object.get(name), name, depthPrefix + " ");
break;
case ARRAY:
logger.info(depthPrefix + "ARRAY");
JsonArray array = (JsonArray) tree;
for (JsonValue val : array) dumpJSON(val, null, depthPrefix + " ");
break;
case STRING:
JsonString st = (JsonString) tree;
logger.info(depthPrefix + "STRING " + st.getString());
break;
case NUMBER:
JsonNumber num = (JsonNumber) tree;
logger.info(depthPrefix + "NUMBER " + num.toString());
break;
case TRUE:
case FALSE:
case NULL:
logger.info(depthPrefix + tree.getValueType().toString());
break;
}
}
/**
* Get long value out of the message json payload
*
* @param key Key to find value for
* @param defaultValue Default value if key can't be found
* @return value in object, or the provided default
*/
public long getLong(String key, long defaultValue) {
JsonObject obj = getParsedBody();
JsonValue value = obj.get(key);
if (value != null && value.getValueType() == ValueType.NUMBER) {
return ((JsonNumber) value).longValue();
}
return defaultValue;
}
/**
* @param key
* @return JsonObject value or null
*/
public JsonObject getObject(String key) {
JsonObject obj = getParsedBody();
JsonValue value = obj.get(key);
if (value != null && value.getValueType() == ValueType.OBJECT) {
return (JsonObject) value;
}
return null;
}
/**
* Get boolean value out of the message json payload
*
* @param key Key to find value for
* @param defaultValue Default value if key can't be found
* @return value in object, or the provided default
*/
public boolean getBoolean(String key, boolean defaultValue) {
JsonObject obj = getParsedBody();
JsonValue value = obj.get(key);
if (value != null) {
if (value.getValueType() == ValueType.FALSE) return false;
if (value.getValueType() == ValueType.TRUE) return true;
}
return defaultValue;
}
public void run() {
Deque<VisitingContext> stack = new ArrayDeque<>();
stack.add(new VisitingContext(rootNode));
boolean goOn = stack.peek().hasNext();
if (goOn) {
do {
Map.Entry<String, JsonValue> current = stack.peek().nextElement();
if (!(current.getValue() instanceof JsonStructure)) {
String key = stack.peek().getNSPrefix() + current.getKey();
String value = null;
JsonValue jsonValue = current.getValue();
switch (jsonValue.getValueType()) {
case NULL:
value = null;
break;
case FALSE:
value = Boolean.FALSE.toString();
break;
case TRUE:
Boolean.TRUE.toString();
break;
case NUMBER:
value = jsonValue.toString();
break;
case STRING:
value = ((JsonString) jsonValue).getString();
break;
default:
throw new ConfigException("Internal failure while processing JSON document.");
}
targetStore.put(key, value);
} else if (current.getValue() instanceof JsonObject) {
String key = stack.peek().getNSPrefix() + current.getKey();
JsonObject node = (JsonObject) current.getValue();
stack.push(new VisitingContext(node, key));
} else if (current.getValue() instanceof JsonArray) {
throw new ConfigException("Arrays are not supported at the moment.");
} else {
throw new ConfigException("Internal failure while processing JSON document.");
}
goOn = stack.peek().hasNext();
while (!goOn && stack.size() > 0) {
stack.remove();
goOn = (stack.size() > 0) && stack.peek().hasNext();
}
} while (goOn);
}
}
@Override
public boolean getBoolean(int index, boolean defaultValue) {
JsonValue value = list.get(index);
if (value == null) {
return defaultValue;
} else if (value.getValueType() == ValueType.TRUE) {
return true;
} else if (value.getValueType() == ValueType.FALSE) {
return false;
} else {
// TODO check spec
throw new IllegalStateException("index" + index + " is " + value.getValueType());
}
}
private void handleArray(
final Writer writer,
final String prefix,
final Map<String, JsonObject> nestedTypes,
final JsonValue value,
final String jsonField,
final String fieldName,
final int arrayLevel,
final Collection<String> imports)
throws IOException {
final JsonArray array = JsonArray.class.cast(value);
if (array.size()
> 0) { // keep it simple for now - 1 level, we can have an awesome recursive algo later if
// needed
final JsonValue jsonValue = array.get(0);
switch (jsonValue.getValueType()) {
case OBJECT:
final String javaName = toJavaName(fieldName);
nestedTypes.put(javaName, JsonObject.class.cast(jsonValue));
fieldGetSetMethods(writer, jsonField, fieldName, javaName, prefix, arrayLevel, imports);
break;
case TRUE:
case FALSE:
fieldGetSetMethods(writer, jsonField, fieldName, "Boolean", prefix, arrayLevel, imports);
break;
case NUMBER:
fieldGetSetMethods(writer, jsonField, fieldName, "Double", prefix, arrayLevel, imports);
break;
case STRING:
fieldGetSetMethods(writer, jsonField, fieldName, "String", prefix, arrayLevel, imports);
break;
case ARRAY:
handleArray(
writer,
prefix,
nestedTypes,
jsonValue,
jsonField,
fieldName,
arrayLevel + 1,
imports);
break;
case NULL:
default:
throw new UnsupportedOperationException("Unsupported " + value + ".");
}
} else {
getLog().warn("Empty arrays are ignored");
}
}
/**
* @param key
* @return JsonArray value or null
*/
public List<Long> getLongArray(String key, List<Long> defaultValue) {
JsonObject obj = getParsedBody();
JsonValue arrayValue = obj.get(key);
if (arrayValue != null && arrayValue.getValueType() == ValueType.ARRAY) {
try {
List<Long> result = new ArrayList<>();
((JsonArray) arrayValue).forEach(value -> result.add(((JsonNumber) value).longValue()));
return result;
} catch (Exception e) { // class cast, etc
Log.log(Level.FINER, this, "Exception parsing JsonArray: " + arrayValue, e);
// fall through to return default value
}
}
return defaultValue;
}
/**
* Get optional long value out of the message json payload
*
* @param key Key to find value for
* @return value in object or null
*/
public String getString(String key) {
String result = null;
JsonObject obj = getParsedBody();
JsonValue value = obj.get(key);
if (value != null) {
try {
if (value.getValueType() == ValueType.STRING) {
result = obj.getString(key);
} else {
result = value.toString();
}
} catch (Exception e) { // class cast, etc
Log.log(Level.FINER, this, "Exception parsing String: " + value, e);
// fall through to return default value
}
}
return result;
}
/**
* http://docs.oracle.com/middleware/1213/wls/WLPRG/java-api-for-json-proc.htm#WLPRG1061
*
* @param tree
* @param key
*/
public static Object navigateTree(JsonValue tree, String key) {
Object ret = null;
if (key != null) System.out.print("Key " + key + ": ");
switch (tree.getValueType()) {
case OBJECT:
System.out.println("OBJECT");
JsonObject object = (JsonObject) tree;
for (String name : object.keySet()) navigateTree(object.get(name), name);
break;
case ARRAY:
System.out.println("ARRAY");
JsonArray array = (JsonArray) tree;
for (JsonValue val : array) navigateTree(val, null);
break;
case STRING:
JsonString st = (JsonString) tree;
System.out.println("STRING " + st.getString());
break;
case NUMBER:
JsonNumber num = (JsonNumber) tree;
System.out.println("NUMBER " + num.toString());
break;
case TRUE:
System.out.println("TRUE");
case FALSE:
System.out.println("FALSE");
case NULL:
System.out.println(tree.getValueType().toString());
break;
}
return ret;
}
private Object jsonValueToObject(JsonValue jsonValue) {
switch (jsonValue.getValueType()) {
case FALSE:
return Boolean.FALSE;
case TRUE:
return Boolean.TRUE;
case NULL:
return null;
case STRING:
{
JsonString casted = (JsonString) jsonValue;
return casted.getString();
}
case NUMBER:
{
JsonNumber number = (JsonNumber) jsonValue;
if (number.isIntegral()) {
try {
long l = number.longValueExact();
if (l < Integer.MIN_VALUE || l > Integer.MAX_VALUE) {
return l;
}
return number.intValueExact();
} catch (ArithmeticException ex) {
return number.bigIntegerValueExact();
}
}
return number.doubleValue();
}
case ARRAY:
{
assert jsonValue instanceof JsonArray;
return (JsonArray) jsonValue;
}
case OBJECT:
default:
throw new AssertionError(jsonValue + " is not accepted as a column value");
}
}
public static int navigateTree(JsonValue tree, String skip) {
int ret = 0;
switch (tree.getValueType()) {
case OBJECT:
// System.out.println("OBJECT");
JsonArrayBuilder dirtyResult = Json.createArrayBuilder();
JsonObject object = (JsonObject) tree;
for (String name : object.keySet()) {
if (object.get(name).getValueType() == JsonValue.ValueType.STRING
&& object.getString(name).equals(skip)) {
return 0;
}
dirtyResult.add(object.get(name));
}
ret = ret + navigateTree(dirtyResult.build(), skip);
break;
case ARRAY:
// System.out.println("ARRAY");
JsonArray array = (JsonArray) tree;
for (JsonValue val : array) ret = ret + navigateTree(val, skip);
break;
case STRING:
JsonString st = (JsonString) tree;
// System.out.println("STRING " + st.getString());
break;
case NUMBER:
JsonNumber num = (JsonNumber) tree;
return num.intValue();
case TRUE:
case FALSE:
case NULL:
// System.out.println(tree.getValueType().toString());
break;
}
return ret;
}
/**
* @param name The name of the parameter. Not empty.
* @param json The JSON value of the parameter. Not null.
* @return The newly created subdialogue parameter
*/
public static Parameter createWithJson(String name, JsonValue json) {
Assert.notNull(json, "json");
return createWithExpression(name, json.toString());
}
