org.modelmapper.gson.JsonElementValueReader.java Source code

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Here is the source code for org.modelmapper.gson.JsonElementValueReader.java

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/*
 * Copyright 2013 the original author or authors.
 *
 * 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.modelmapper.gson;

import java.util.Collection;
import java.util.Set;

import org.modelmapper.internal.util.Lists;
import org.modelmapper.spi.ValueReader;

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

/**
 * JsonElement ValueReader implementation.
 * 
 * @author Jonathan Halterman
 */
public class JsonElementValueReader implements ValueReader<JsonElement> {
    public Object get(JsonElement source, String memberName) {
        if (source.isJsonObject()) {
            JsonObject subjObj = source.getAsJsonObject();
            JsonElement propertyElement = subjObj.get(memberName);
            if (propertyElement == null)
                throw new IllegalArgumentException();

            if (propertyElement.isJsonObject())
                return propertyElement.getAsJsonObject();
            if (propertyElement.isJsonArray())
                return propertyElement.getAsJsonArray();
            if (propertyElement.isJsonPrimitive()) {
                JsonPrimitive jsonPrim = propertyElement.getAsJsonPrimitive();
                if (jsonPrim.isBoolean())
                    return jsonPrim.getAsBoolean();
                if (jsonPrim.isNumber())
                    return jsonPrim.getAsNumber();
                if (jsonPrim.isString())
                    return jsonPrim.getAsString();
            }
        }

        return null;
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public Collection<String> memberNames(JsonElement source) {
        if (source.isJsonObject())
            return Lists.from((Set) ((JsonObject) source).entrySet());
        return null;
    }

    @Override
    public String toString() {
        return "Gson";
    }
}