org.nuxeo.opensocial.webengine.gadgets.GadgetStreamWriter.java Source code

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Here is the source code for org.nuxeo.opensocial.webengine.gadgets.GadgetStreamWriter.java

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/*
 * (C) Copyright 2006-2009 Nuxeo SA (http://nuxeo.com/) and contributors.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public License
 * (LGPL) version 2.1 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 *
 * This library 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.
 *
 * Contributors:
 *     Leroy Merlin (http://www.leroymerlin.fr/) - initial implementation
 */

package org.nuxeo.opensocial.webengine.gadgets;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.nuxeo.common.utils.FileUtils;

@Provider
public class GadgetStreamWriter implements MessageBodyWriter<GadgetStream> {

    private static final Log log = LogFactory.getLog(GadgetStreamWriter.class);

    public long getSize(GadgetStream t, Class<?> type, Type genericType, Annotation[] annotations,
            MediaType mediaType) {
        return -1;
    }

    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return type.isAssignableFrom(GadgetStream.class);
    }

    public void writeTo(GadgetStream t, Class<?> type, Type genericType, Annotation[] annotations,
            MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
            throws IOException, WebApplicationException {
        try {
            FileUtils.copy(t.getStream(), entityStream);
        } catch (IOException e) {
            Throwable cause = e.getCause();
            if (cause != null && "Broken pipe".equals(cause.getMessage())) {
                log.debug("Swallowing: " + e);
            } else {
                throw e;
            }
        } finally {
            t.getStream().close();
        }
    }
}