de.uni_koeln.spinfo.maalr.webapp.ui.common.client.AsyncLemmaDescriptionLoader.java Source code

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Here is the source code for de.uni_koeln.spinfo.maalr.webapp.ui.common.client.AsyncLemmaDescriptionLoader.java

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/*******************************************************************************
 * Copyright 2013 Sprachliche Informationsverarbeitung, University of Cologne
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package de.uni_koeln.spinfo.maalr.webapp.ui.common.client;

import com.google.gwt.core.shared.GWT;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.client.rpc.AsyncCallback;

import de.uni_koeln.spinfo.maalr.common.shared.description.Escaper;
import de.uni_koeln.spinfo.maalr.common.shared.description.LemmaDescription;

public class AsyncLemmaDescriptionLoader {

    private static CommonServiceAsync service = GWT.create(CommonService.class);
    private static LemmaDescription description;

    public static LemmaDescription getDescription() {
        return description;
    }

    public static void afterLemmaDescriptionLoaded(final AsyncCallback<LemmaDescription> callback) {
        if (description == null) {
            service.getLemmaDescription(new AsyncCallback<LemmaDescription>() {

                @Override
                public void onSuccess(LemmaDescription loaded) {
                    loaded.setDefaultEscaper(new Escaper() {

                        @Override
                        public String escape(String text) {
                            return SafeHtmlUtils.htmlEscape(text);
                        }
                    });
                    description = loaded;
                    callback.onSuccess(description);
                }

                @Override
                public void onFailure(Throwable arg0) {
                    Dialog.showError("Service unavailable", arg0);
                }
            });
        } else {
            //         command.execute();
            callback.onSuccess(description);
        }
    }

}