org.isisaddons.module.excel.dom.ExcelFileBlobConverter Maven / Gradle / Ivy

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A domain service for Apache Isis', allowing collections of (view model) objects to be exported/imported to/from an Excel spreadsheet.

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/*
 *  Copyright 2014 Dan Haywood
 *
 *  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 org.isisaddons.module.excel.dom;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.util.IOUtils;
import org.apache.isis.applib.value.Blob;

class ExcelFileBlobConverter {


    // //////////////////////////////////////
    
    Blob toBlob(final String name, final File file) {
        FileInputStream fis = null;
        ByteArrayOutputStream baos = null;
        try {
            fis = new FileInputStream(file);
            baos = new ByteArrayOutputStream();
            IOUtils.copy(fis, baos);
            return new Blob(name, ExcelService.XSLX_MIME_TYPE, baos.toByteArray());
        } catch (IOException ex) {
            throw new ExcelService.Exception(ex);
        } finally {
            IOUtils.closeQuietly(fis);
            IOUtils.closeQuietly(baos);
        }
    }

}