com.sepgil.ral.UpdateNodeTask.java Source code

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Here is the source code for com.sepgil.ral.UpdateNodeTask.java

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package com.sepgil.ral;

/**
 * This file is part of RestWS Android Library (RAL).
 * RAL 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.
 * 
 * RAL 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 RAL.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.UnsupportedEncodingException;

import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.entity.StringEntity;
import org.apache.http.protocol.HTTP;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * Updates a node.
 * @author Sebastian Gilits
 *
 */
public class UpdateNodeTask extends DrupalOperationTask {
    public enum ErrorState {
        ERROR_PARSE, ERROR_HTTP,
    }

    private OnNodeUpdatedListener mListener = null;
    private Node mNode;

    /**
     * Constructor
     * @param node The node which should be updated.
     * @throws JSONException
     */
    public UpdateNodeTask(Node node) throws JSONException {
        mNode = node;
    }

    /**
     * Register a callback to be invoked when the node was updated.
     * @param listener The callback that will run.
     */
    public void setOnNodeUpdatedListener(OnNodeUpdatedListener listener) {
        mListener = listener;
    }

    @Override
    public String getPath() {
        return "/node/" + mNode.getID();
    }

    @Override
    public HttpRequestBase getHttpRequest(String url) {
        HttpPost post = new HttpPost(url);

        try {
            StringEntity enity = new StringEntity(mNode.getJSON(), HTTP.UTF_8);
            post.setEntity(enity);
        } catch (JSONException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return post;
    }

    @Override
    public void onResponse(JSONObject response) {
        if (mListener == null)
            return;
        mListener.onNodeUpdated();
    }

    @Override
    public void onJSONError(JSONException e) {
        if (mListener == null)
            return;
        //mListener.onError(ErrorState.ERROR_PARSE);
        // RestWS generates a wrong JSON as response, so will simply ignore this problem.
        mListener.onNodeUpdated();
    }

    @Override
    public void onHttpError(StatusLine statusLine) {
        if (mListener == null)
            return;
        switch (statusLine.getStatusCode()) {
        case HttpStatus.SC_FORBIDDEN:
            mListener.onNoAccess(mNode.getID());
            break;
        case HttpStatus.SC_NOT_FOUND:
            mListener.onNotFound(mNode.getID());
            break;
        default:
            mListener.onError(ErrorState.ERROR_HTTP);
        }

    }

    @Override
    public void onParserError(Exception e) {
        if (mListener == null)
            return;
        mListener.onError(ErrorState.ERROR_PARSE);
    }

    /**
     * Interface definition for a callback to be invoked when the node was updated (or not).
     * @author Sebastian Gilits
     *
     */
    public interface OnNodeUpdatedListener {
        /**
         * Called when the node was updated.
         */
        public void onNodeUpdated();

        /**
         * Called when the server returned 403.
         * @param nid The node id.
         */
        public void onNoAccess(int nid);

        /**
         * Called when the server returned 404.
         * @param nid The node id.
         */
        public void onNotFound(int nid);

        /**
         * Called when the there was an error.
         * @param error The ErrorState which represents the caus for the error.
         */
        public void onError(ErrorState error);
    }
}