mitm.common.util.MiscIOUtils.java Source code

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Here is the source code for mitm.common.util.MiscIOUtils.java

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/*
 * Copyright (c) 2010-2011, Martijn Brinkers, Djigzo.
 *
 * This file is part of Djigzo email encryption.
 *
 * Djigzo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License
 * version 3, 19 November 2007 as published by the Free Software
 * Foundation.
 *
 * Djigzo 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 Djigzo. If not, see <http://www.gnu.org/licenses/>
 *
 * Additional permission under GNU AGPL version 3 section 7
 *
 * If you modify this Program, or any covered work, by linking or
 * combining it with aspectjrt.jar, aspectjweaver.jar, tyrex-1.0.3.jar,
 * freemarker.jar, dom4j.jar, mx4j-jmx.jar, mx4j-tools.jar,
 * spice-classman-1.0.jar, spice-loggerstore-0.5.jar, spice-salt-0.8.jar,
 * spice-xmlpolicy-1.0.jar, saaj-api-1.3.jar, saaj-impl-1.3.jar,
 * wsdl4j-1.6.1.jar (or modified versions of these libraries),
 * containing parts covered by the terms of Eclipse Public License,
 * tyrex license, freemarker license, dom4j license, mx4j license,
 * Spice Software License, Common Development and Distribution License
 * (CDDL), Common Public License (CPL) the licensors of this Program grant
 * you additional permission to convey the resulting work.
 */
package mitm.common.util;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.DeferredFileOutputStream;

/**
 * general IO utility methods
 *
 * @author Martijn Brinkers
 *
 */
public class MiscIOUtils {
    /**
     * Creates an InputStream of the content of {@link DeferredFileOutputStream}. The output is closed before reading the
     * content. This is required when the {@link DeferredFileOutputStream} uses a file to make sure the file is
     * completely written to disk.
     *
     * Note: If {@link DeferredFileOutputStream} uses a file, the file will be automatically deleted when #close is
     * called for the InputStream. The caller is responsible for calling close.
     */
    @SuppressWarnings("resource")
    public static InputStream toInputStream(DeferredFileOutputStream output) throws IOException {
        Check.notNull(output, "output");

        IOUtils.closeQuietly(output);

        return output.isInMemory() ? new ByteArrayInputStream(output.getData())
                : new BufferedInputStream(new DeleteFileOnCloseFileInputStream(output.getFile()));
    }
}