com.nextep.designer.beng.model.impl.FileUtils.java Source code

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Here is the source code for com.nextep.designer.beng.model.impl.FileUtils.java

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/*******************************************************************************
 * Copyright (c) 2011 neXtep Software and contributors.
 * All rights reserved.
 *
 * This file is part of neXtep designer.
 *
 * NeXtep designer is free software: you can redistribute it 
 * and/or modify it under the terms of the GNU General Public 
 * License as published by the Free Software Foundation, either 
 * version 3 of the License, or any later version.
 *
 * NeXtep designer 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 General Public License
 * along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     neXtep Softwares - initial API and implementation
 *******************************************************************************/
package com.nextep.designer.beng.model.impl;

import java.io.BufferedWriter;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.nextep.datadesigner.exception.ErrorException;
import com.nextep.datadesigner.sqlgen.services.SQLGenUtil;
import com.nextep.designer.core.CorePlugin;
import com.nextep.designer.sqlgen.preferences.PreferenceConstants;
import com.nextep.designer.sqlgen.services.IGenerationService;

/**
 * @author Christophe Fondacci
 */
public class FileUtils {

    private static final Log log = LogFactory.getLog(FileUtils.class);
    private static final int FILE_BUFFER = 10240;

    /**
     * Writes the specified contents to a file at the given file location.
     * 
     * @param fileName name of the file to create (will be replaced if exists)
     * @param contents contents to write to the file.
     */
    public static void writeToFile(String fileName, String contents) {
        // Retrieves the encoding specified in the preferences
        String encoding = SQLGenUtil.getPreference(PreferenceConstants.SQL_SCRIPT_ENCODING);
        final boolean convert = SQLGenUtil.getPreferenceBool(PreferenceConstants.SQL_SCRIPT_NEWLINE_CONVERT);
        if (convert) {
            String newline = CorePlugin.getService(IGenerationService.class).getNewLine();
            // Converting everything to \n then \n to expected new line
            contents = contents.replace("\r\n", "\n");
            contents = contents.replace("\r", "\n");
            contents = contents.replace("\n", newline);
        }
        Writer w = null;
        try {
            w = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File(fileName)), encoding));
            w.write(contents);
        } catch (FileNotFoundException e) {
            throw new ErrorException(e);
        } catch (IOException e) {
            throw new ErrorException(e);
        } finally {
            if (w != null) {
                try {
                    w.close();
                } catch (IOException e) {
                    throw new ErrorException(e);
                }
            }
        }
    }

    public static void closeStream(Closeable stream) {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException e) {
                throw new ErrorException(e);
            }
        }
    }

    public static void copyFile(File srcFile, File destFile) throws IOException {
        InputStream in = new FileInputStream(srcFile);
        OutputStream out = new FileOutputStream(destFile);
        long millis = System.currentTimeMillis();
        copyStreams(in, out);
        out.close();
        in.close();
        millis = System.currentTimeMillis() - millis;
        log.info("File " + srcFile + " copied in " + (millis / 1000L) + "s."); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    }

    public static void copyStreams(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[FILE_BUFFER];
        int bytesRead;
        while ((bytesRead = in.read(buffer)) >= 0) {
            out.write(buffer, 0, bytesRead);
        }
    }
}