Example usage for com.google.gson JsonElement isJsonNull

List of usage examples for com.google.gson JsonElement isJsonNull

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Introduction

In this page you can find the example usage for com.google.gson JsonElement isJsonNull.

Prototype

public boolean isJsonNull()

Source Link

Document

provides check for verifying if this element represents a null value or not.

Usage

From source file:org.apache.hadoop.hive.json.JsonShredder.java

License:Apache License

private void shredObject(String name, JsonElement json) throws IOException {
    if (json.isJsonPrimitive()) {
        JsonPrimitive primitive = (JsonPrimitive) json;
        if (primitive.isBoolean()) {
            getFile(name).append(primitive.getAsBoolean() + "\n");
        } else if (primitive.isString()) {
            getFile(name).append(primitive.getAsString().replace("\\", "\\\\").replace("\n", "\\n") + "\n");
        } else if (primitive.isNumber()) {
            getFile(name).append(primitive.getAsNumber() + "\n");
        }/*from   ww w.j a va 2 s .  co  m*/
    } else if (json.isJsonNull()) {
        // just skip it
    } else if (json.isJsonArray()) {
        for (JsonElement child : ((JsonArray) json)) {
            shredObject(name, child);
        }
    } else {
        JsonObject obj = (JsonObject) json;
        for (Map.Entry<String, JsonElement> field : obj.entrySet()) {
            String fieldName = field.getKey();
            shredObject(name + "." + fieldName, field.getValue());
        }
    }
}

From source file:org.apache.metamodel.elasticsearch.elastic1.rest.JestElasticSearchUtils.java

License:Apache License

private static Object getDataFromColumnType(JsonElement field, ColumnType type) {
    if (field == null || field.isJsonNull()) {
        return null;
    }// w ww . j av a2s.c o  m

    if (field.isJsonObject()) {
        return new Gson().fromJson(field, Map.class);
    }
    if (field.isJsonArray()) {
        return new Gson().fromJson(field, List.class);
    }

    if (type.isNumber()) {
        // Pretty terrible workaround to avoid LazilyParsedNumber
        // (which is happily output, but not recognized by Jest/GSON).
        return NumberComparator.toNumber(field.getAsString());
    } else if (type.isTimeBased()) {
        final Date valueToDate = ElasticSearchDateConverter.tryToConvert(field.getAsString());
        if (valueToDate == null) {
            return field.getAsString();
        } else {
            return valueToDate;
        }
    } else if (type.isBoolean()) {
        return field.getAsBoolean();
    } else {
        return field.getAsString();
    }
}

From source file:org.apache.orc.tools.json.JsonSchemaFinder.java

License:Apache License

static HiveType pickType(JsonElement json) {
    if (json.isJsonPrimitive()) {
        JsonPrimitive prim = (JsonPrimitive) json;
        if (prim.isBoolean()) {
            return new BooleanType();
        } else if (prim.isNumber()) {
            Matcher matcher = DECIMAL_PATTERN.matcher(prim.getAsString());
            if (matcher.matches()) {
                int intDigits = matcher.group("int").length();
                String fraction = matcher.group("fraction");
                int scale = fraction == null ? 0 : fraction.length();
                if (scale == 0) {
                    if (intDigits < 19) {
                        long value = prim.getAsLong();
                        if (value >= -128 && value < 128) {
                            return new NumericType(HiveType.Kind.BYTE, intDigits, scale);
                        } else if (value >= -32768 && value < 32768) {
                            return new NumericType(HiveType.Kind.SHORT, intDigits, scale);
                        } else if (value >= -2147483648 && value < 2147483648L) {
                            return new NumericType(HiveType.Kind.INT, intDigits, scale);
                        } else {
                            return new NumericType(HiveType.Kind.LONG, intDigits, scale);
                        }// w  ww  . ja v  a 2  s . c o m
                    } else if (intDigits == 19) {
                        // at 19 digits, it may fit inside a long, but we need to check
                        BigInteger val = prim.getAsBigInteger();
                        if (val.compareTo(MIN_LONG) >= 0 && val.compareTo(MAX_LONG) <= 0) {
                            return new NumericType(HiveType.Kind.LONG, intDigits, scale);
                        }
                    }
                }
                if (intDigits + scale <= MAX_DECIMAL_DIGITS) {
                    return new NumericType(HiveType.Kind.DECIMAL, intDigits, scale);
                }
            }
            double value = prim.getAsDouble();
            if (value >= Float.MIN_VALUE && value <= Float.MAX_VALUE) {
                return new NumericType(HiveType.Kind.FLOAT, 0, 0);
            } else {
                return new NumericType(HiveType.Kind.DOUBLE, 0, 0);
            }
        } else {
            String str = prim.getAsString();
            if (TIMESTAMP_PATTERN.matcher(str).matches()) {
                return new StringType(HiveType.Kind.TIMESTAMP);
            } else if (HEX_PATTERN.matcher(str).matches()) {
                return new StringType(HiveType.Kind.BINARY);
            } else {
                return new StringType(HiveType.Kind.STRING);
            }
        }
    } else if (json.isJsonNull()) {
        return new NullType();
    } else if (json.isJsonArray()) {
        ListType result = new ListType();
        result.elementType = new NullType();
        for (JsonElement child : ((JsonArray) json)) {
            HiveType sub = pickType(child);
            if (result.elementType.subsumes(sub)) {
                result.elementType.merge(sub);
            } else if (sub.subsumes(result.elementType)) {
                sub.merge(result.elementType);
                result.elementType = sub;
            } else {
                result.elementType = new UnionType(result.elementType, sub);
            }
        }
        return result;
    } else {
        JsonObject obj = (JsonObject) json;
        StructType result = new StructType();
        for (Map.Entry<String, JsonElement> field : obj.entrySet()) {
            String fieldName = field.getKey();
            HiveType type = pickType(field.getValue());
            result.fields.put(fieldName, type);
        }
        return result;
    }
}

From source file:org.apache.orc.tools.json.JsonShredder.java

License:Apache License

private void shredObject(String name, JsonElement json) throws IOException {
    if (json.isJsonPrimitive()) {
        JsonPrimitive primitive = (JsonPrimitive) json;
        getFile(name).println(primitive.getAsString());
    } else if (json.isJsonNull()) {
        // just skip it
    } else if (json.isJsonArray()) {
        for (JsonElement child : ((JsonArray) json)) {
            shredObject(name + ".list", child);
        }/*  w  w w  .j a  v  a  2  s .com*/
    } else {
        JsonObject obj = (JsonObject) json;
        for (Map.Entry<String, JsonElement> field : obj.entrySet()) {
            String fieldName = field.getKey();
            shredObject(name + "." + fieldName, field.getValue());
        }
    }
}

From source file:org.apache.qpid.disttest.json.PropertyValueAdapter.java

License:Apache License

@Override
public PropertyValue deserialize(JsonElement json, Type type, JsonDeserializationContext context)
        throws JsonParseException {
    if (json.isJsonNull()) {
        return null;
    } else if (json.isJsonPrimitive()) {
        Object result = null;/*from www. j a va  2  s.  c  o  m*/
        JsonPrimitive primitive = json.getAsJsonPrimitive();
        if (primitive.isString()) {
            result = primitive.getAsString();
        } else if (primitive.isNumber()) {
            String asString = primitive.getAsString();
            if (asString.indexOf('.') != -1 || asString.indexOf('e') != -1) {
                result = primitive.getAsDouble();
            } else {
                result = primitive.getAsLong();
            }
        } else if (primitive.isBoolean()) {
            result = primitive.getAsBoolean();
        } else {
            throw new JsonParseException("Unsupported primitive value " + primitive);
        }
        return new SimplePropertyValue(result);
    } else if (json.isJsonArray()) {
        JsonArray array = json.getAsJsonArray();
        List<Object> result = new ArrayList<Object>(array.size());
        for (JsonElement element : array) {
            result.add(context.deserialize(element, Object.class));
        }
        return new SimplePropertyValue(result);
    } else if (json.isJsonObject()) {
        JsonObject object = json.getAsJsonObject();
        JsonElement defElement = object.getAsJsonPrimitive(DEF_FIELD);
        Class<?> classInstance = null;
        if (defElement != null) {
            try {
                classInstance = _factory.getPropertyValueClass(defElement.getAsString());
            } catch (ClassNotFoundException e) {
                // ignore
            }
        }
        if (classInstance == null) {
            Map<String, Object> result = new HashMap<String, Object>();
            for (Map.Entry<String, JsonElement> entry : object.entrySet()) {
                Object value = context.deserialize(entry.getValue(), Object.class);
                result.put(entry.getKey(), value);
            }
            return new SimplePropertyValue(result);
        } else {
            return context.deserialize(json, classInstance);
        }
    } else {
        throw new JsonParseException("Unsupported JSON type " + json);
    }
}

From source file:org.apache.sling.jms.Json.java

License:Apache License

private static <T> T toMapValue(JsonElement element) {
    if (element.isJsonObject()) {
        return (T) toMapValue(element.getAsJsonObject());
    } else if (element.isJsonArray()) {
        return (T) toMapValue(element.getAsJsonArray());
    } else if (element.isJsonNull()) {
        return null;
    } else if (element.isJsonPrimitive()) {
        return (T) toMapValue(element.getAsJsonPrimitive());
    }//from w  w  w.ja v  a2 s. c  o m
    throw new IllegalArgumentException(
            "Encountered JsonElement that is not an object, array, primitive or null: " + element);
}

From source file:org.apache.synapse.mediators.bsf.ScriptMediator.java

License:Apache License

private void processJSONPayload(MessageContext synCtx, ScriptMessageContext scriptMC) throws ScriptException {
    if (!(synCtx instanceof Axis2MessageContext)) {
        return;/*from w w  w.  j  a va2  s . c  o m*/
    }
    org.apache.axis2.context.MessageContext messageContext = ((Axis2MessageContext) synCtx)
            .getAxis2MessageContext();
    String jsonString = (String) messageContext.getProperty("JSON_STRING");
    Object jsonObject = null;
    prepareForJSON(scriptMC);
    if (JsonUtil.hasAJsonPayload(messageContext)) {
        try {
            JsonElement o = jsonParser.parse(new JsonReader(JsonUtil.newJsonPayloadReader(messageContext))); // first, check if the stream is valid.
            if (o.isJsonNull()) {
                logger.error("#processJSONPayload. JSON stream is not valid.");
                return;
            }
            jsonObject = this.jsEngine.eval(JsonUtil.newJavaScriptSourceReader(messageContext));
        } catch (Exception e) {
            handleException("Failed to get the JSON payload from the input stream. Error>>>\n"
                    + e.getLocalizedMessage());
        }
    } else if (jsonString != null) {
        String jsonPayload = jsonParser.parse(jsonString).toString();
        jsonObject = this.jsEngine.eval('(' + jsonPayload + ')');
    }
    if (jsonObject != null) {
        scriptMC.setJsonObject(synCtx, jsonObject);
    }
}

From source file:org.apache.tika.eval.tokens.AnalyzerDeserializer.java

License:Apache License

private static CharFilterFactory[] buildCharFilters(JsonElement el, String analyzerName) throws IOException {
    if (el == null || el.isJsonNull()) {
        return null;
    }/*  w  ww.  ja  v  a2s  .co  m*/
    if (!el.isJsonArray()) {
        throw new IllegalArgumentException(
                "Expecting array for charfilters, but got:" + el.toString() + " for " + analyzerName);
    }
    JsonArray jsonArray = (JsonArray) el;
    List<CharFilterFactory> ret = new LinkedList<CharFilterFactory>();
    for (JsonElement filterMap : jsonArray) {
        if (!(filterMap instanceof JsonObject)) {
            throw new IllegalArgumentException(
                    "Expecting a map with \"factory\" string and \"params\" map in char filter factory;"
                            + " not: " + filterMap.toString() + " in " + analyzerName);
        }
        JsonElement factoryEl = ((JsonObject) filterMap).get(FACTORY);
        if (factoryEl == null || !factoryEl.isJsonPrimitive()) {
            throw new IllegalArgumentException(
                    "Expecting value for factory in char filter factory builder in:" + analyzerName);
        }
        String factoryName = factoryEl.getAsString();
        factoryName = factoryName.replaceAll("oala.", "org.apache.lucene.analysis.");

        JsonElement paramsEl = ((JsonObject) filterMap).get(PARAMS);
        Map<String, String> params = mapify(paramsEl);
        String spiName = "";
        for (String s : CharFilterFactory.availableCharFilters()) {
            Class clazz = CharFilterFactory.lookupClass(s);
            if (clazz.getName().equals(factoryName)) {
                spiName = s;
                break;
            }
        }
        if (spiName.equals("")) {
            throw new IllegalArgumentException(
                    "A SPI class of type org.apache.lucene.analysis.util.CharFilterFactory with name" + "'"
                            + factoryName + "' does not exist.");
        }

        try {
            CharFilterFactory charFilterFactory = CharFilterFactory.forName(spiName, params);
            if (charFilterFactory instanceof ResourceLoaderAware) {
                ((ResourceLoaderAware) charFilterFactory)
                        .inform(new ClasspathResourceLoader(AnalyzerDeserializer.class));
            }
            ret.add(charFilterFactory);
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("While trying to load " + analyzerName + ": " + e.getMessage(),
                    e);
        }
    }
    if (ret.size() == 0) {
        return new CharFilterFactory[0];
    }
    return ret.toArray(new CharFilterFactory[ret.size()]);
}

From source file:org.apache.tika.eval.tokens.AnalyzerDeserializer.java

License:Apache License

private static TokenFilterFactory[] buildTokenFilterFactories(JsonElement el, String analyzerName)
        throws IOException {
    if (el == null || el.isJsonNull()) {
        return null;
    }/*from   w w w.j av a  2 s  . c  o  m*/
    if (!el.isJsonArray()) {
        throw new IllegalArgumentException(
                "Expecting array for tokenfilters, but got:" + el.toString() + " in " + analyzerName);
    }
    JsonArray jsonArray = (JsonArray) el;
    List<TokenFilterFactory> ret = new LinkedList<>();
    for (JsonElement filterMap : jsonArray) {
        if (!(filterMap instanceof JsonObject)) {
            throw new IllegalArgumentException(
                    "Expecting a map with \"factory\" string and \"params\" map in token filter factory;"
                            + " not: " + filterMap.toString() + " in " + analyzerName);
        }
        JsonElement factoryEl = ((JsonObject) filterMap).get(FACTORY);
        if (factoryEl == null || !factoryEl.isJsonPrimitive()) {
            throw new IllegalArgumentException(
                    "Expecting value for factory in token filter factory builder in " + analyzerName);
        }
        String factoryName = factoryEl.getAsString();
        factoryName = factoryName.startsWith("oala.")
                ? factoryName.replaceFirst("oala.", "org.apache.lucene.analysis.")
                : factoryName;

        JsonElement paramsEl = ((JsonObject) filterMap).get(PARAMS);
        Map<String, String> params = mapify(paramsEl);
        String spiName = "";
        for (String s : TokenFilterFactory.availableTokenFilters()) {
            Class clazz = TokenFilterFactory.lookupClass(s);
            if (clazz.getName().equals(factoryName)) {
                spiName = s;
                break;
            }
        }
        if (spiName.equals("")) {
            throw new IllegalArgumentException(
                    "A SPI class of type org.apache.lucene.analysis.util.TokenFilterFactory with name" + "'"
                            + factoryName + "' does not exist.");
        }

        try {
            TokenFilterFactory tokenFilterFactory = TokenFilterFactory.forName(spiName, params);
            if (tokenFilterFactory instanceof ResourceLoaderAware) {
                ((ResourceLoaderAware) tokenFilterFactory)
                        .inform(new ClasspathResourceLoader(AnalyzerDeserializer.class));
            }
            ret.add(tokenFilterFactory);
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("While loading " + analyzerName, e);
        }
    }
    if (ret.size() == 0) {
        return new TokenFilterFactory[0];
    }
    return ret.toArray(new TokenFilterFactory[ret.size()]);
}

From source file:org.apache.tika.eval.tokens.AnalyzerDeserializer.java

License:Apache License

private static Map<String, String> mapify(JsonElement paramsEl) {
    if (paramsEl == null || paramsEl.isJsonNull()) {
        return Collections.EMPTY_MAP;
    }/*  ww  w  .  ja v  a  2s.  com*/
    if (!paramsEl.isJsonObject()) {
        throw new IllegalArgumentException("Expecting map, not: " + paramsEl.toString());
    }
    Map<String, String> params = new HashMap<>();
    for (Map.Entry<String, JsonElement> e : ((JsonObject) paramsEl).entrySet()) {
        JsonElement value = e.getValue();
        if (!value.isJsonPrimitive()) {
            throw new IllegalArgumentException(
                    "Expecting parameter to have primitive value: " + value.toString());
        }
        String v = e.getValue().getAsString();
        params.put(e.getKey(), v);
    }
    return params;
}