rexsl-maven-plugin-0.2.7.src.main.java.com.rexsl.maven.packers.CssPacker Maven / Gradle / Ivy

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/**
 * Copyright (c) 2011, ReXSL.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met: 1) Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the following
 * disclaimer. 2) Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution. 3) Neither the name of the ReXSL.com nor
 * the names of its contributors may be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.rexsl.maven.packers;

import com.yahoo.platform.yui.compressor.CssCompressor;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import org.apache.commons.io.IOUtils;

/**
 * Packager of CSS files. All comments and unnecessary spaces are removed.
 *
 * @author Yegor Bugayenko ([email protected])
 * @version $Id: CssPacker.java 464 2011-12-12 09:30:18Z guard $
 */
public final class CssPacker extends AbstractPacker {

    /**
     * Encoding.
     */
    private static final String ENCODING = "UTF-8";

    /**
     * {@inheritDoc}
     */
    @Override
    protected String extension() {
        return "css";
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void pack(final File src, final File dest) throws IOException {
        final Reader input = new InputStreamReader(
            new FileInputStream(src),
            this.ENCODING
        );
        try {
            final Writer output = new OutputStreamWriter(
                new FileOutputStream(dest),
                this.ENCODING
            );
            try {
                new CssCompressor(input).compress(output, -1);
            } finally {
                IOUtils.closeQuietly(output);
            }
        } finally {
            IOUtils.closeQuietly(input);
        }
    }
}