photark-jcr/src/main/java/org/apache/photark/upload/FileUploader.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.photark.upload;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.commons.compress.archivers.ArchiveException;
import org.apache.commons.compress.archivers.ArchiveStreamFactory;
import org.apache.photark.Image;

public class FileUploader {

    private String entryTypes[] = {".jpg", ".jpeg", ".png", ".gif"};

    public FileUploader() {
    }

    public List<Image> uploadFile(InputStream inStream, String fileName) throws IOException {

        List<Image> pictures = new ArrayList<Image>();

        if (isArchive(inStream)) {
            ArchiveFileExtractor archiveFileExtractor = new ArchiveFileExtractor(entryTypes);
            pictures = archiveFileExtractor.extractArchive(inStream);
        } else {
            // this is a picture file and not the archive file
            Image picture = new Image(fileName, new Date(), inStream);
            pictures.add(picture);
        }
        return pictures;
    }

    /**
     * Test whether this stream is of archive or not
     * 
     * @param inStream InputStream
     * @return boolean
     */
    public boolean isArchive(InputStream inStream) {
        ArchiveStreamFactory streamFactory = new ArchiveStreamFactory();
        try {
            streamFactory.createArchiveInputStream(inStream);
            return true;
        } catch (ArchiveException e) {
            e.printStackTrace();
        }
        return false;
    }
}