org.vectomatic.svg.edit.client.load.UrlLoadRequest.java Source code

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Here is the source code for org.vectomatic.svg.edit.client.load.UrlLoadRequest.java

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/**********************************************
 * Copyright (C) 2011 Lukas Laag
 * This file is part of svgreal.
 * 
 * svgreal 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.
 * 
 * svgreal 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 svgreal.  If not, see http://www.gnu.org/licenses/
 **********************************************/
package org.vectomatic.svg.edit.client.load;

import java.io.IOException;

import org.vectomatic.dom.svg.utils.OMSVGParser;
import org.vectomatic.dom.svg.utils.ParserException;
import org.vectomatic.svg.edit.client.AppConstants;
import org.vectomatic.svg.edit.client.AppMessages;
import org.vectomatic.svg.edit.client.SvgrealApp;

import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;

/**
 * Class to load URLs into the application
 * @author laaglu
 */
public class UrlLoadRequest extends LoadRequestBase {
    private String url;

    public UrlLoadRequest(String url) {
        this.url = url;
        int index = url.lastIndexOf('/');
        this.title = (index != -1 && index != url.length() - 1) ? url.substring(index + 1) : url;
    }

    @Override
    public void load() {
        final SvgrealApp app = SvgrealApp.getApp();
        final String resourceUrl = FetchUtils.getFetchUrl(url, "text/xml");
        RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, resourceUrl);
        requestBuilder.setCallback(new RequestCallback() {
            public void onError(Request request, Throwable e) {
                GWT.log("Cannot fetch " + url, e);
                app.info(AppConstants.INSTANCE.openUrlMenuItem(),
                        AppMessages.INSTANCE.loadErrorMessage(url, e.getMessage()));
            }

            private void onSuccess(Request request, Response response) {
                try {
                    app.addWindow(OMSVGParser.parse(response.getText()), UrlLoadRequest.this);
                } catch (ParserException e) {
                    app.info(AppConstants.INSTANCE.openLocalMenuItem(),
                            AppMessages.INSTANCE.loadErrorMessage(resourceUrl, e.getMessage()));
                }
            }

            public void onResponseReceived(Request request, Response response) {
                if (response.getStatusCode() == Response.SC_OK) {
                    onSuccess(request, response);
                } else {
                    onError(request, new IOException(
                            AppMessages.INSTANCE.httpErrorMessage(Integer.toString(response.getStatusCode()))));
                }
            }
        });
        try {
            requestBuilder.send();
        } catch (RequestException e) {
            GWT.log("Cannot fetch " + url, e);
            app.info(AppConstants.INSTANCE.openUrlMenuItem(),
                    AppMessages.INSTANCE.loadErrorMessage(url, e.getMessage()));
        }
    }

    @Override
    public boolean equals(Object o) {
        if (o instanceof UrlLoadRequest) {
            UrlLoadRequest r = (UrlLoadRequest) o;
            return url.equals(r.url);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return url.hashCode();
    }

}