org.pentaho.mantle.client.dialogs.scheduling.OutputLocationUtils.java Source code

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Here is the source code for org.pentaho.mantle.client.dialogs.scheduling.OutputLocationUtils.java

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/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.mantle.client.dialogs.scheduling;

import org.pentaho.gwt.widgets.client.utils.NameUtils;
import org.pentaho.gwt.widgets.client.utils.string.StringUtils;

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;
import com.google.gwt.user.client.Command;

/**
 * @author Rowell Belen
 */
public class OutputLocationUtils {

    public static void validateOutputLocation(final String outputLocation, final Command successCallback,
            final Command errorCallback) {

        if (StringUtils.isEmpty(outputLocation)) {
            return;
        }

        final String outputLocationPath = NameUtils.encodeRepositoryPath(outputLocation);
        final String url = ScheduleHelper.getFullyQualifiedURL() + "api/repo/files/" + outputLocationPath //$NON-NLS-1$
                + "/tree?depth=1";
        RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
        // This header is required to force Internet Explorer to not cache values from the GET response.
        builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
        try {
            builder.sendRequest(null, new RequestCallback() {
                public void onError(Request request, Throwable exception) {
                    if (errorCallback != null) {
                        errorCallback.execute();
                    }
                }

                public void onResponseReceived(Request request, Response response) {
                    if (response.getStatusCode() == Response.SC_OK) {
                        if (successCallback != null) {
                            successCallback.execute();
                        }
                    } else {
                        if (errorCallback != null) {
                            errorCallback.execute();
                        }
                    }
                }
            });
        } catch (RequestException e) {
            if (errorCallback != null) {
                errorCallback.execute();
            }
        }
    }
}