/*
Viewer for Khan Academy
Copyright (C) 2012 Concentric Sky, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.concentricsky.android.khanacademy.data.remote;
import java.io.IOException;
import java.util.Iterator;
import com.concentricsky.android.khanacademy.data.db.UserVideo;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.TreeNode;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.node.ObjectNode;
public class UserVideoDeserializerModule extends SimpleModule {
private static final long serialVersionUID = 1990628478880621620L;
private ObjectMapper defaultMapper;
public UserVideoDeserializerModule() {
super("UserVideoDeserializerModule", new Version(1, 0, 0, null, "com.concentricsky.android", "khanacademy"));
this.addDeserializer(UserVideo.class, new UserVideoDeserializer());
defaultMapper = new ObjectMapper();
}
public final class UserVideoDeserializer extends StdScalarDeserializer<UserVideo> {
private static final long serialVersionUID = 5540210306258763322L;
public UserVideoDeserializer() { super(UserVideo.class); }
@Override
public UserVideo deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException {
TreeNode tree = defaultMapper.readTree(jp);
ObjectNode root = (ObjectNode) tree;
Iterator<String> keys = root.fieldNames();
while (keys.hasNext()) {
String key = keys.next();
if ("video".equals(key)) {
JsonNode value = root.get(key);
if (value.isObject()) {
root.set(key, value.get("readable_id"));
}
}
}
UserVideo video = defaultMapper.treeToValue(tree, UserVideo.class);
return video;
}
}
}