com.berniesanders.fieldthebern.parsing.PageContentDeserializer.java Source code

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Here is the source code for com.berniesanders.fieldthebern.parsing.PageContentDeserializer.java

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/*
 * Copyright (c) 2016 - Bernie 2016, Inc.
 *
 * 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.berniesanders.fieldthebern.parsing;

import com.berniesanders.fieldthebern.models.Content;
import com.berniesanders.fieldthebern.models.H1;
import com.berniesanders.fieldthebern.models.H2;
import com.berniesanders.fieldthebern.models.H3;
import com.berniesanders.fieldthebern.models.Iframe;
import com.berniesanders.fieldthebern.models.Img;
import com.berniesanders.fieldthebern.models.List;
import com.berniesanders.fieldthebern.models.Nav;
import com.berniesanders.fieldthebern.models.P;
import com.berniesanders.fieldthebern.models.Quote;
import com.berniesanders.fieldthebern.models.Video;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSyntaxException;
import java.lang.reflect.Type;
import timber.log.Timber;

/**
 * Custom Gson deserializer for page 'content' to deserialize items into 'h1' 'p' etc
 *
 * TODO: this could use some unit tests
 * TODO: We'll need to do something similar with page.content json arrays of 'h1' 'h2' 'p' etc
 */
public class PageContentDeserializer implements JsonDeserializer<Content> {

    @Override
    public Content deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {

        //Gson gson = new Gson(); //use a temp gson so we don't trigger a stack overflow.
        //Content untypedContent = gson.fromJson(json, Content.class);

        Content typedContent = null;
        switch (json.getAsJsonObject().get("type").getAsString()) {
        case "h1":
            typedContent = context.deserialize(json, H1.class);
            break;
        case "h2":
            typedContent = context.deserialize(json, H2.class);
            break;
        case "h3":
            typedContent = context.deserialize(json, H3.class);
            break;
        case "p":
            typedContent = context.deserialize(json, P.class);
            break;
        case "img":
            typedContent = context.deserialize(json, Img.class);
            break;
        case "nav":
            try {
                typedContent = context.deserialize(json, Nav.class);
            } catch (JsonSyntaxException jsonEx) {
                Timber.e(jsonEx, "Error deserializing a JSON object");
                //use an empty nav item, there is an error in the ftb json
                typedContent = new Nav();
            }
            break;
        case "video":
            typedContent = context.deserialize(json, Video.class);
            break;
        case "quote":
            typedContent = context.deserialize(json, Quote.class);
            break;
        case "list":
            typedContent = context.deserialize(json, List.class);
            break;
        case "iframe":
            typedContent = context.deserialize(json, Iframe.class);
            break;
        default:
            throw new JsonParseException("unknown type:" + json.getAsJsonObject().get("type").getAsString());
        }

        return typedContent;
    }
}