com.b12kab.tmdblibrary.TmdbHelper.java Source code

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Here is the source code for com.b12kab.tmdblibrary.TmdbHelper.java

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/*
 * Copyright 2013 Uwe Trottmann
 *
 * 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 com.b12kab.tmdblibrary;

import com.b12kab.tmdblibrary.entities.AccountState;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;

import java.lang.reflect.Type;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TmdbHelper {

    /** Format for decoding JSON dates in string format. */
    private static final SimpleDateFormat JSON_STRING_DATE = new SimpleDateFormat("yyy-MM-dd");

    /**
     * Create a {@link com.google.gson.GsonBuilder} and register all of the custom types needed in
     * order to properly deserialize complex TMDb-specific types.
     *
     * @return Assembled GSON builder instance.
     */
    public static GsonBuilder getGsonBuilder() {
        GsonBuilder builder = new GsonBuilder();

        // class types
        builder.registerTypeAdapter(AccountState.class, new AccountStateDeserializer());
        builder.registerTypeAdapter(Integer.class, new JsonDeserializer<Integer>() {
            @Override
            public Integer deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
                    throws JsonParseException {
                try {
                    return Integer.valueOf(json.getAsInt());
                } catch (NumberFormatException e) {
                    return null;
                }
            }
        });
        builder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
            @Override
            public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
                    throws JsonParseException {

                try {
                    return JSON_STRING_DATE.parse(json.getAsString());
                } catch (ParseException e) {
                    return null;
                }
            }
        });

        return builder;
    }
}