Application: gvSIG desktop

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package org.gvsig.fmap.dal.store.simplereader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.nio.charset.Charset;

import java.util.Objects;

import org.apache.commons.io.FileUtils;

import org.apache.commons.io.input.BOMInputStream;

import org.apache.commons.lang3.StringUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 *

 * @author fdiaz

 */

public class SimpleReaderUtils {

    private static final Logger LOGGER = LoggerFactory.getLogger(SimpleReaderUtils.class);

    public static InputStreamReader openFile(File f, String charsetName) throws FileNotFoundException {

        String fullFileName = f==null? "NULL":f.getAbsolutePath();

        Charset charset = Charset.defaultCharset();

        InputStream fis = new BOMInputStream(new FileInputStream(f));

        if (StringUtils.isNotBlank(charsetName)) {

            if (Charset.isSupported(charsetName)) {

                try {

                    charset = Charset.forName(charsetName);

                } catch (Throwable th) {

                    LOGGER.warn("Can't use charset '" + charsetName + "' for read csv '" + fullFileName + "'.", th);

                }

            } else {

                LOGGER.warn("charset '" + charsetName + "' not supported for read csv '" + fullFileName + "'.");

            }

        }

        InputStreamReader isr = new InputStreamReader(fis, charset);

        return isr;

    }

    public static boolean isFileNewer(File file, File fileReference){

        if(file == null || fileReference == null){

            return false;

        }

        long lastModified = fileReference.lastModified();

        // Por si el archivo nos lo ha enviado el Doctor Who desde el futuro

        long now = System.currentTimeMillis();

        if(now < lastModified){

            LOGGER.warn("The file date is future " + Objects.toString(fileReference));

            lastModified = now;

        }

        return FileUtils.isFileNewer(file, lastModified);

    }

    public static boolean isFileNewer(File file, long reference){

        if(file == null){

            return false;

        }

        // Por si el archivo nos lo ha enviado el Doctor Who desde el futuro

        long now = System.currentTimeMillis();

        if(now < reference){

            LOGGER.warn("The reference file date is future " + Objects.toString(file));

            reference = now;

        }

        return FileUtils.isFileNewer(file, reference);

    }

}