org.kurento.commons.BasicJsonUtils.java Source code

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Here is the source code for org.kurento.commons.BasicJsonUtils.java

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/*
 * (C) Copyright 2013 Kurento (http://kurento.org/)
 *
 * 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.kurento.commons;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

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

public class BasicJsonUtils {

    public static Map<String, Object> toPropertiesMap(JsonObject jsonProps) {
        Map<String, Object> map;
        if (jsonProps != null) {
            map = new HashMap<>();
            for (Entry<String, JsonElement> e : jsonProps.entrySet()) {
                map.put(e.getKey(), convertValue(e.getValue()));
            }
        } else {
            map = Collections.emptyMap();
        }
        return map;
    }

    private static Object convertValue(JsonElement value) {
        if (value.isJsonNull()) {
            return null;
        } else if (value.isJsonPrimitive()) {
            JsonPrimitive prim = value.getAsJsonPrimitive();
            if (prim.isBoolean()) {
                return prim.getAsBoolean();
            } else if (prim.isNumber()) {
                Number n = prim.getAsNumber();
                if (n.doubleValue() == n.intValue()) {
                    return n.intValue();
                } else {
                    return n.doubleValue();
                }
            } else if (prim.isString()) {
                return prim.getAsString();
            } else {
                throw new RuntimeException("Unrecognized value: " + value);
            }
        } else {
            return value.toString();
        }
    }
}