org.trancecode.io.Files.java Source code

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Here is the source code for org.trancecode.io.Files.java

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/*
 * Copyright (C) 2010 Herve Quiroz
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 * 
 * This library 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 Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
package org.trancecode.io;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

/**
 * Utility methods related to {@link File}.
 * 
 * @author Herve Quiroz
 */
public final class Files {
    private Files() {
        // No instantiation
    }

    public static FileInputStream newFileInputStream(final File file) {
        try {
            return new FileInputStream(file);
        } catch (final FileNotFoundException e) {
            throw new IllegalStateException(file.toString(), e);
        }
    }

    public static FileOutputStream newFileOutputStream(final File file) {
        try {
            return new FileOutputStream(file);
        } catch (final FileNotFoundException e) {
            throw new IllegalStateException(file.toString(), e);
        }
    }

    public static List<File> listDirectories(final File directory) {
        Preconditions.checkNotNull(directory);
        return ImmutableList.copyOf(directory.listFiles(FileFilters.isDirectory()));
    }

    public static File createTempFile(final Object caller) {
        return createTempFile(caller.getClass());
    }

    public static File createTempFile(final Class<?> callerClass) {
        try {
            return File.createTempFile(callerClass.getSimpleName(), "");
        } catch (final IOException e) {
            throw new IllegalStateException(e);
        }
    }
}