com.javacreed.examples.gson.part1.BookDeserializer.java Source code

Introduction

Here is the source code for com.javacreed.examples.gson.part1.BookDeserializer.java

Source

/**
 * Copyright 2012-2014 Java Creed.
 * 
 * Licensed under the Apache License, Version 2.0 (the "<em>License</em>");
 * 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.javacreed.examples.gson.part1;

import java.lang.reflect.Type;

import com.google.gson.JsonArray;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;

public class BookDeserializer implements JsonDeserializer<Book> {

    @Override
    public Book deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
            throws JsonParseException {
        final JsonObject jsonObject = json.getAsJsonObject();

        final JsonElement jsonTitle = jsonObject.get("title");
        final String title = jsonTitle.getAsString();

        final String isbn10 = jsonObject.get("isbn-10").getAsString();
        final String isbn13 = jsonObject.get("isbn-13").getAsString();

        final JsonArray jsonAuthorsArray = jsonObject.get("authors").getAsJsonArray();
        final String[] authors = new String[jsonAuthorsArray.size()];
        for (int i = 0; i < authors.length; i++) {
            final JsonElement jsonAuthor = jsonAuthorsArray.get(i);
            authors[i] = jsonAuthor.getAsString();
        }

        final Book book = new Book();
        book.setTitle(title);
        book.setIsbn10(isbn10);
        book.setIsbn13(isbn13);
        book.setAuthors(authors);
        return book;
    }
}