org.openeos.attachments.internal.dao.AttachmentUtils.java Source code

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Here is the source code for org.openeos.attachments.internal.dao.AttachmentUtils.java

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/**
 * Copyright 2014 Fernando Rincon Martin <frm.rincon@gmail.com>
 *
 * 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.openeos.attachments.internal.dao;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Blob;

import org.apache.commons.io.IOUtils;
import org.hibernate.LobHelper;

public class AttachmentUtils {

    private static final String TEMP_PREFIX = "attch";
    private static final String TEMP_SUFFIX = ".tmp";

    public static Blob createBlob(LobHelper lobHelper, InputStream origInputStream) {
        try {
            final File file = File.createTempFile(TEMP_PREFIX, TEMP_SUFFIX);
            OutputStream out = new FileOutputStream(file);
            IOUtils.copy(origInputStream, out);
            out.close();
            origInputStream.close();
            long len = file.length();
            file.deleteOnExit();
            InputStream in = new FileInputStream(file) {

                @Override
                public void close() throws IOException {
                    super.close();
                    file.delete();
                }

            };
            return lobHelper.createBlob(in, len);
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }
}