org.sourcepit.consul.forwarder.GsonUtils.java Source code

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Here is the source code for org.sourcepit.consul.forwarder.GsonUtils.java

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/*
 * Copyright 2015 Bernd Vogt and others.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sourcepit.consul.forwarder;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

public final class GsonUtils {
    private GsonUtils() {
        super();
    }

    public static JsonArray getAsJsonArray(JsonObject object, String member) {
        return getAsJsonArray(object.get(member));
    }

    public static JsonArray getAsJsonArray(final JsonElement jsonElement) {
        if (jsonElement == null || jsonElement.isJsonNull()) {
            return new JsonArray();
        }
        return jsonElement.getAsJsonArray();
    }

    public static JsonObject getAsJsonObject(JsonObject root, String... path) {
        JsonObject current = root;
        for (String field : path) {
            current = getAsJsonObject(current.get(field));
            if (current == null) {
                return current;
            }
        }
        return current;
    }

    public static JsonObject getAsJsonObject(final JsonElement jsonElement) {
        if (jsonElement == null || jsonElement.isJsonNull()) {
            return null;
        }
        return jsonElement.getAsJsonObject();
    }

    public static String getAsString(JsonObject object, String member) {
        return getAsString(object.get(member));
    }

    public static String getAsString(JsonElement jsonElement) {
        if (jsonElement == null || jsonElement.isJsonNull()) {
            return null;
        }
        return jsonElement.getAsString();
    }

    public static Integer getAsInteger(JsonObject object, String member) {
        return getAsInteger(object.get(member));
    }

    public static Integer getAsInteger(JsonElement jsonElement) {
        if (jsonElement == null || jsonElement.isJsonNull()) {
            return null;
        }
        return Integer.valueOf(jsonElement.getAsInt());
    }
}