Java Resource Load getResourceAsTempFile(Object context, String resourceName)

Description

get Resource As Temp File

License

Open Source License

Declaration

public static File getResourceAsTempFile(Object context,
            String resourceName) throws IOException

Method Source Code

//package com.java2s;
/*/*from   w ww.ja v  a2  s .  co m*/
 * $Id:  $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2014 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, Kevin Day, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    private static final String TESTPREFIX = "itexttest_";

    public static File getResourceAsTempFile(Object context,
            String resourceName) throws IOException {

        InputStream is = getResourceAsStream(context, resourceName);

        return writeStreamToTempFile(resourceName, is);
    }

    public static InputStream getResourceAsStream(Object context,
            String resourceName) {
        Class<?> contextClass;
        if (context instanceof Class<?>) {
            contextClass = (Class<?>) context;
        } else {
            contextClass = context.getClass();
        }
        String fullResourceName = getFullyQualifiedResourceName(
                contextClass, resourceName);
        InputStream is = contextClass.getClassLoader().getResourceAsStream(
                fullResourceName);
        if (is == null)
            throw new IllegalArgumentException(
                    "Unable to find test resource '" + fullResourceName
                            + "'");
        return is;
    }

    private static File writeStreamToTempFile(String id, InputStream is)
            throws IOException {
        if (is == null)
            throw new NullPointerException("Input stream is null");

        File f = File.createTempFile(TESTPREFIX + id + "-", ".pdf");
        f.deleteOnExit();

        final OutputStream os = new BufferedOutputStream(
                new FileOutputStream(f));

        try {
            writeInputToOutput(is, os);
        } finally {
            is.close();
            os.close();
        }

        return f;

    }

    public static String getFullyQualifiedResourceName(Class<?> context,
            String resourceName) {
        return context.getName().replace('.', '/') + "/" + resourceName;
    }

    private static void writeInputToOutput(InputStream is, OutputStream os)
            throws IOException {
        final byte[] buffer = new byte[8192];
        while (true) {
            final int bytesRead = is.read(buffer);
            if (bytesRead == -1) {
                break;
            }
            os.write(buffer, 0, bytesRead);
        }

    }
}

Java Resource Load getResourceAsTempFile(Object context, String resourceName)

Description

License

Declaration

Method Source Code

Related