com.voxeo.tropo.actions.JsonAction Maven / Gradle / Ivy
package com.voxeo.tropo.actions;
import java.net.MalformedURLException;
import java.net.URL;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import com.voxeo.tropo.Key;
import com.voxeo.tropo.TropoException;
public abstract class JsonAction extends Action {
public JsonAction() {
super(new JsonObject());
}
public JsonAction(Key... keys) {
this();
addKeys(keys);
}
@Override
public void reset() {
setNode(new JsonObject());
}
protected void addKeys(Key... keys) {
for (Key key : keys) {
if (!isValidKey(key)) {
throw new TropoException(String.format("Invalid key '%s' for action", key.getName()));
}
putProperty(key.getName(), key.getValue());
}
}
protected void accumulate(String key, Action action) {
JsonObject node = (JsonObject) getNode();
JsonElement oldKeyElement = node.get(key);
if (oldKeyElement == null) {
put(key, action.json());
}
else if (oldKeyElement.isJsonArray()) {
// There is already an json array element. Accumulate it!
JsonElement json = action.json();
if (json.isJsonArray()) {
((JsonArray) oldKeyElement).addAll((JsonArray) json);
}
else {
((JsonArray) oldKeyElement).add(json);
}
}
else {
// There is already an json object element. Accumulate it!
JsonElement json = action.json();
JsonArray newArray = new JsonArray();
newArray.add(oldKeyElement);
if (json.isJsonArray()) {
newArray.addAll((JsonArray) json);
}
else {
newArray.add(json);
}
node.add(key, newArray);
}
}
public void put(String key, Action action) {
action.setParent(this);
validate();
put(key, action.json());
}
protected void putProperty(String key, Object value) {
if (value instanceof Boolean) {
((JsonObject) getNode()).addProperty(key, (Boolean) value);
}
else if (value instanceof Number) {
((JsonObject) getNode()).addProperty(key, (Number) value);
}
else if (value instanceof Character) {
((JsonObject) getNode()).addProperty(key, (Character) value);
}
else if (value instanceof String) {
((JsonObject) getNode()).addProperty(key, (String) value);
}
else {
((JsonObject) getNode()).add(key, new Gson().toJsonTree(value));
}
}
protected void put(String key, JsonElement value) {
((JsonObject) getNode()).add(key, value);
}
protected Object get(String key) {
if (this instanceof JsonAction) {
JsonObject node = (JsonObject) getNode();
JsonElement element = node.get(key);
if (element instanceof JsonPrimitive) {
JsonPrimitive primitive = (JsonPrimitive)element;
if(primitive.isBoolean()){
return primitive.getAsBoolean();
}
else if(primitive.isNumber()){
return primitive.getAsNumber();
}
else{
return primitive.getAsString();
}
}
else {
return element;
}
}
return null;
}
private void checkFields(String... fields) throws TropoException {
for (String field : fields) {
if (get(field) == null) {
throw new TropoException(String.format("Missing required property: '%s'", field));
}
}
}
protected void validate() throws TropoException {
if (this instanceof JsonAction) {
for (String key : getRequiredKeys()) {
checkFields(key);
}
}
}
public void checkUrl(String url) throws TropoException {
String string = (String) get(url);
if (string != null) {
try {
new URL(string);
}
catch (MalformedURLException e) {
throw new TropoException("The 'url' parameter must be a valid URL");
}
}
}
}