com.sonicle.webtop.core.servlet.old.WriterResponseWrapper.java Source code

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Here is the source code for com.sonicle.webtop.core.servlet.old.WriterResponseWrapper.java

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/*
 * WebTop Services is a Web Application framework developed by Sonicle S.r.l.
 * Copyright (C) 2014 Sonicle S.r.l.
 *
 * 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 SONICLE, SONICLE 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 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.
 *
 * You can contact Sonicle S.r.l. at email address sonicle@sonicle.com
 *
 * 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 version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * Sonicle logo and Sonicle copyright notice. If the display of the logo is not
 * reasonably feasible for technical reasons, the Appropriate Legal Notices must
 * display the words "Copyright (C) 2014 Sonicle S.r.l.".
 */
package com.sonicle.webtop.core.servlet.old;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import org.apache.commons.io.IOUtils;

/**
 *
 * @author malbinola
 */
public class WriterResponseWrapper extends HttpServletResponseWrapper implements ClosableServletResponse {
    private PrintWriter writer = null;

    public WriterResponseWrapper(HttpServletResponse response) {
        super(response);
    }

    @Override
    public void close() throws IOException {
        IOUtils.closeQuietly(writer);
    }

    @Override
    public ServletOutputStream getOutputStream() throws IOException {
        throw new IllegalStateException("Call getWriter() instead.");
    }

    @Override
    public PrintWriter getWriter() throws IOException {
        if (writer == null) {
            writer = super.getWriter();
        }
        return writer;
    }
}