Example usage for com.fasterxml.jackson.databind.node NullNode getInstance

Introduction

In this page you can find the example usage for com.fasterxml.jackson.databind.node NullNode getInstance.

Prototype

public static NullNode getInstance() 

Source Link

Usage

From source file:org.ocsoft.olivia.models.contents.config.JsonObject.java

public int getAsInt(String key, int defaultValue) {
    JsonNode value = root.get(key);// ww  w.  ja va  2  s .c o  m
    if (value == NullNode.getInstance())
        return defaultValue;
    return value.asInt();
}

---

From source file:com.almende.eve.state.redis.RedisState.java

@Override
public JsonNode get(String key) {
    final Jedis redis = provider.getInstance();
    final String nkey = makeKey(key);

    JsonNode res = NullNode.getInstance();
    try {// w  w  w  .  ja v  a 2 s  . c  om
        final String data = redis.get(nkey);
        if (data != null && !data.trim().isEmpty()) {
            res = JOM.getInstance().readTree(data);
        }
    } catch (JsonProcessingException e) {
        LOG.log(Level.WARNING, "Couldn't read:" + nkey, e);
    } catch (IOException e) {
        LOG.log(Level.WARNING, "Couldn't read:" + nkey, e);
    }
    provider.returnInstance(redis);
    return res;
}

---

From source file:com.baasbox.commands.ScriptsResource.java

private static JsonNode storageCommand(JsonNode command, JsonCallback callback) throws CommandException {
    JsonNode moduleId = command.get(ScriptCommand.ID);

    if (moduleId == null || !moduleId.isTextual()) {
        throw new CommandParsingException(command, "error parsing module id");
    }//from   w w  w  .ja  v a2 s  .c o m
    String id = moduleId.asText();
    JsonNode params = command.get(ScriptCommand.PARAMS);
    if (params == null || !params.isObject()) {
        throw new CommandParsingException(command, "error parsing params");
    }
    JsonNode actionNode = params.get("action");
    if (actionNode == null || !actionNode.isTextual()) {
        throw new CommandParsingException(command, "error parsing action");
    }
    String action = actionNode.asText();
    ODocument result;
    if ("get".equals(action)) {
        try {
            result = ScriptingService.getStore(id);
        } catch (ScriptException e) {
            //should never happen
            throw new CommandExecutionException(command, "script does not exists");
        }
    } else if ("set".equals(action)) {
        JsonNode args = params.get("args");
        if (args == null) {
            args = NullNode.getInstance();
        }
        if (!args.isObject() && !args.isNull()) {
            throw new CommandExecutionException(command, "Stored values should be objects or null");
        }
        try {
            result = ScriptingService.resetStore(id, args);
        } catch (ScriptException e) {
            throw new CommandExecutionException(command, "script does not exists");
        }
    } else if ("swap".equals(action)) {
        if (callback == null)
            throw new CommandExecutionException(command, "missing function callback");
        try {
            result = ScriptingService.swap(id, callback);
        } catch (ScriptException e) {
            throw new CommandExecutionException(command, ExceptionUtils.getMessage(e), e);
        }
    } else if ("trade".equals(action)) {
        if (callback == null)
            throw new CommandExecutionException(command, "missing function callback");
        try {
            result = ScriptingService.trade(id, callback);
        } catch (ScriptException e) {
            throw new CommandExecutionException(command, ExceptionUtils.getMessage(e), e);
        }
    } else {
        throw new CommandParsingException(command, "unknown action: " + action);
    }
    if (result == null) {
        return NullNode.getInstance();
    } else {
        String s = result.toJSON();
        try {
            ObjectNode jsonNode = (ObjectNode) Json.mapper().readTree(s);
            jsonNode.remove("@version");
            jsonNode.remove("@type");
            return jsonNode;
        } catch (IOException e) {
            throw new CommandExecutionException(command, "error converting result", e);
        }
    }
}

---

From source file:org.ocsoft.olivia.models.contents.config.JsonObject.java

public double getAsDouble(String key, double defaultValue) {
    JsonNode value = root.get(key);/*from   w  w  w . j  av a  2  s.co  m*/
    if (value == NullNode.getInstance())
        return defaultValue;
    return value.asDouble();
}

---

From source file:com.almende.eve.state.redis.RedisState.java

@Override
public JsonNode locPut(final String key, JsonNode value) {
    if (value == null) {
        value = NullNode.getInstance();
    }/*from ww  w .ja v a  2s.  com*/
    final Jedis redis = provider.getInstance();
    final String nkey = makeKey(key);
    redis.set(nkey, value.toString());
    redis.sadd(getId() + "_" + KEYS, nkey);
    provider.returnInstance(redis);
    return value;
}

---

From source file:com.almende.eve.state.redis.RedisState.java

@Override
public boolean locPutIfUnchanged(final String key, final JsonNode newVal, JsonNode oldVal) {
    boolean result = false;
    final Jedis redis = provider.getInstance();
    try {/*from www  .  j  av a2 s .  c  o m*/
        JsonNode cur = get(key);
        if (oldVal == null) {
            oldVal = NullNode.getInstance();
        }
        final String nkey = makeKey(key);
        if (oldVal.equals(cur) || oldVal.toString().equals(cur.toString())) {
            redis.set(nkey, newVal.toString());
            redis.sadd(getId() + "_" + KEYS, nkey);
            result = true;
        }
    } catch (Exception e) {
        LOG.log(Level.WARNING, "", e);
        // Don't let users loop if exception is thrown. They
        // would get into a deadlock....
        result = true;
    }
    provider.returnInstance(redis);
    return result;
}

---

From source file:com.digitalpebble.storm.crawler.parse.ParseFilters.java

@SuppressWarnings("rawtypes")
@Override//  w w w.  j ava  2 s  .c o m
public void configure(Map stormConf, JsonNode filtersConf) {
    // initialises the filters
    List<ParseFilter> filterLists = new ArrayList<>();

    // get the filters part
    String name = getClass().getCanonicalName();
    filtersConf = filtersConf.get(name);

    if (filtersConf == null) {
        LOG.info("No field {} in JSON config. Skipping", name);
        filters = new ParseFilter[0];
        return;
    }

    // conf node contains a list of objects
    Iterator<JsonNode> filterIter = filtersConf.elements();
    while (filterIter.hasNext()) {
        JsonNode afilterConf = filterIter.next();
        String filterName = "<unnamed>";
        JsonNode nameNode = afilterConf.get("name");
        if (nameNode != null) {
            filterName = nameNode.textValue();
        }
        JsonNode classNode = afilterConf.get("class");
        if (classNode == null) {
            LOG.error("Filter {} doesn't specified a 'class' attribute", filterName);
            continue;
        }
        String className = classNode.textValue().trim();
        filterName += '[' + className + ']';
        // check that it is available and implements the interface
        // ParseFilter
        try {
            Class<?> filterClass = Class.forName(className);
            boolean subClassOK = ParseFilter.class.isAssignableFrom(filterClass);
            if (!subClassOK) {
                LOG.error("Filter {} does not extend ParseFilter", filterName);
                continue;
            }
            ParseFilter filterInstance = (ParseFilter) filterClass.newInstance();

            JsonNode paramNode = afilterConf.get("params");
            if (paramNode != null) {
                filterInstance.configure(stormConf, paramNode);
            } else {
                // Pass in a nullNode if missing
                filterInstance.configure(stormConf, NullNode.getInstance());
            }

            filterLists.add(filterInstance);
            LOG.info("Setup {}", filterName);
        } catch (Exception e) {
            LOG.error("Can't setup {}: {}", filterName, e);
            throw new RuntimeException("Can't setup " + filterName, e);
        }
    }

    filters = filterLists.toArray(new ParseFilter[filterLists.size()]);
}

---

From source file:com.digitalpebble.storm.crawler.filtering.URLFilters.java

@Override
public void configure(Map stormConf, JsonNode jsonNode) {
    // initialises the filters
    List<URLFilter> filterLists = new ArrayList<>();

    // get the filters part
    String name = getClass().getCanonicalName();
    jsonNode = jsonNode.get(name);// www . j  a  v a 2 s  . c  o m

    if (jsonNode == null) {
        LOG.info("No field {} in JSON config. Skipping", name);
        filters = new URLFilter[0];
        return;
    }

    // conf node contains a list of objects
    Iterator<JsonNode> filterIter = jsonNode.elements();
    while (filterIter.hasNext()) {
        JsonNode afilterNode = filterIter.next();
        String filterName = "<unnamed>";
        JsonNode nameNode = afilterNode.get("name");
        if (nameNode != null) {
            filterName = nameNode.textValue();
        }
        JsonNode classNode = afilterNode.get("class");
        if (classNode == null) {
            LOG.error("Filter {} doesn't specified a 'class' attribute", filterName);
            continue;
        }
        String className = classNode.textValue().trim();
        filterName += '[' + className + ']';

        // check that it is available and implements the interface URLFilter
        try {
            Class<?> filterClass = Class.forName(className);
            boolean interfaceOK = URLFilter.class.isAssignableFrom(filterClass);
            if (!interfaceOK) {
                LOG.error("Class {} does not implement URLFilter", className);
                continue;
            }
            URLFilter filterInstance = (URLFilter) filterClass.newInstance();

            JsonNode paramNode = afilterNode.get("params");
            if (paramNode != null) {
                filterInstance.configure(stormConf, paramNode);
            } else {
                filterInstance.configure(stormConf, NullNode.getInstance());
            }

            filterLists.add(filterInstance);
            LOG.info("Loaded instance of class {}", className);
        } catch (Exception e) {
            LOG.error("Can't setup {}: {}", filterName, e);
            continue;
        }
    }

    filters = filterLists.toArray(new URLFilter[filterLists.size()]);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• »