org.eclipse.packagedrone.repo.adapter.maven.NodeAdapter.java Source code

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Here is the source code for org.eclipse.packagedrone.repo.adapter.maven.NodeAdapter.java

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/*******************************************************************************
 * Copyright (c) 2015 IBH SYSTEMS GmbH.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBH SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.packagedrone.repo.adapter.maven;

import java.lang.reflect.Type;

import org.eclipse.packagedrone.repo.adapter.maven.ChannelData.ArtifactNode;
import org.eclipse.packagedrone.repo.adapter.maven.ChannelData.ContentNode;
import org.eclipse.packagedrone.repo.adapter.maven.ChannelData.DataNode;
import org.eclipse.packagedrone.repo.adapter.maven.ChannelData.DirectoryNode;
import org.eclipse.packagedrone.repo.adapter.maven.ChannelData.Node;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

public class NodeAdapter implements JsonSerializer<Node>, JsonDeserializer<Node> {

    @Override
    public JsonElement serialize(final Node node, final Type type, final JsonSerializationContext ctx) {
        if (node == null) {
            return JsonNull.INSTANCE;
        }

        final JsonObject o = new JsonObject();

        if (node instanceof ContentNode && !(node instanceof DataNode)) {
            final ContentNode cnode = (ContentNode) node;
            o.addProperty("type", DataNode.class.getSimpleName());
            o.add("node", ctx.serialize(new DataNode(cnode.getData(), cnode.getMimeType())));
        } else {
            o.addProperty("type", node.getClass().getSimpleName());
            o.add("node", ctx.serialize(node));
        }

        return o;
    }

    @Override
    public Node deserialize(final JsonElement element, final Type type, final JsonDeserializationContext ctx)
            throws JsonParseException {

        final JsonObject o = element.getAsJsonObject();
        final String typeString = o.get("type").getAsString();
        final JsonObject val = o.get("node").getAsJsonObject();

        switch (typeString) {
        case "DirectoryNode":
            return ctx.deserialize(val, DirectoryNode.class);
        case "DataNode":
            return ctx.deserialize(val, DataNode.class);
        case "ArtifactNode":
            return ctx.deserialize(val, ArtifactNode.class);
        }

        return null;
    }

}