annis.visualizers.component.AudioVisualizer.java Source code

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Here is the source code for annis.visualizers.component.AudioVisualizer.java

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/*
 * Copyright 2012 Corpuslinguistic working group Humboldt University Berlin.
 *
 * 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 annis.visualizers.component;

import annis.CommonHelper;
import annis.gui.components.medialement.MediaElement;
import annis.gui.components.medialement.MediaElementPlayer;
import annis.libgui.Helper;
import annis.libgui.VisualizationToggle;
import annis.libgui.media.MediaController;
import annis.libgui.visualizers.AbstractVisualizer;
import annis.libgui.visualizers.VisualizerInput;
import annis.service.objects.AnnisBinaryMetaData;
import com.google.common.escape.Escaper;
import com.google.common.net.UrlEscapers;
import com.sun.jersey.api.client.GenericType;
import com.sun.jersey.api.client.WebResource;
import com.vaadin.server.VaadinSession;
import java.util.List;
import net.xeoh.plugins.base.annotations.PluginImplementation;
import org.apache.commons.lang3.Validate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
@PluginImplementation
public class AudioVisualizer extends AbstractVisualizer<MediaElementPlayer> {

    private Logger log = LoggerFactory.getLogger(AudioVisualizer.class);

    private final static Escaper urlPathEscape = UrlEscapers.urlPathSegmentEscaper();
    private final static Escaper urlParamEscape = UrlEscapers.urlPathSegmentEscaper();

    @Override
    public String getShortName() {
        return "audio";
    }

    @Override
    public MediaElementPlayer createComponent(VisualizerInput input, VisualizationToggle visToggle) {
        List<String> corpusPath = CommonHelper.getCorpusPath(input.getDocument().getGraph(), input.getDocument());

        String binaryServletPath = "";

        String corpusName = corpusPath.get(corpusPath.size() - 1);
        String documentName = corpusPath.get(0);

        corpusName = urlPathEscape.escape(corpusName);
        documentName = urlPathEscape.escape(documentName);

        WebResource resMeta = Helper.getAnnisWebResource().path("meta/binary").path(corpusName).path(documentName);
        List<AnnisBinaryMetaData> meta = resMeta.get(new GenericType<List<AnnisBinaryMetaData>>() {
        });

        // if there is no document at all don't fail
        String mimeType = meta.size() > 0 ? null : "audio/ogg";
        for (AnnisBinaryMetaData m : meta) {
            if (m.getMimeType().startsWith("audio/")) {
                mimeType = m.getMimeType();
                break;
            }
        }

        Validate.notNull(mimeType,
                "There must be at least one binary file for the document with a audio mime type");

        String mimeTypeEncoded = mimeType;
        mimeTypeEncoded = urlParamEscape.escape(mimeType);

        binaryServletPath = input.getContextPath() + "/Binary?" + "documentName=" + documentName
                + "&toplevelCorpusName=" + corpusName + "&mime=" + mimeTypeEncoded;

        MediaElementPlayer player = new MediaElementPlayer(MediaElement.audio, binaryServletPath, mimeType);

        if (VaadinSession.getCurrent().getAttribute(MediaController.class) != null) {
            VaadinSession.getCurrent().getAttribute(MediaController.class).addMediaPlayer(player, input.getId(),
                    visToggle);
        }

        return player;
    }
}