Android Open Source - mobilepower-android I O Tools

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2008-2013 Dario Scoppelletti, <http://www.scoppelletti.it/>.
 * // w  ww .j a  v a  2s .c  o  m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package it.scoppelletti.mobilepower.io;

import java.io.*;
import org.slf4j.*;

/**
 * Funzioni di utilit&agrave; <ACRONYM TITLE="input/output">I/O</ACRONYM>.
 * 
 * @since 1.0
 */
public final class IOTools {
    private static final int BUFSIZE = 1024;
    private static final Logger myLogger = LoggerFactory.getLogger("IOUtils");
    
    /**
     * Costruttore privato per classe statica.
     */
    private IOTools() {        
    }
    
    /**
     * Chiude un flusso.
     * 
     * <P>Il metodo {@code close} chiude un flusso ignorando l&rsquo;eventuale
     * eccezione {@code IOException} inoltrata dall&rsquo;operazione (tale
     * eccezione viene emessa come segnalazione di log).<BR>
     * Il valore di ritorno {@code null} pu&ograve; essere utilizzato per
     * azzerare la stessa variabile {@code stream} del flusso in modo tale
     * variabile funga anche da indicatore di flusso aperto
     * ({@code stream != null}) o chiuso ({@code stream == null}).</P>
     * 
     * @param  stream Flusso. Se &egrave; {@code null}, si assume che il flusso
     *                sia gi&agrave; stato chiuso (o non sia mai stato aperto).
     * @return        {@code null}.
     */    
    public static <T extends Closeable> T close(T stream) {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException ex) {
                myLogger.error("Failed to close stream.", ex);
            }            
        }
        
        return null;
    }  
    
    /**
     * Copia un flusso su un altro.
     * 
     * @param in  Flusso di input.
     * @param out Flusso di output.
     */
    public static void copy(InputStream in, OutputStream out) throws
            IOException {
        int n;
        byte[] buf = new byte[IOTools.BUFSIZE];
        
        if (in == null) {
            throw new NullPointerException("Argument in is null.");
        }
        if (out == null) {
            throw new NullPointerException("Argument out is null.");
        }        
        
        n = in.read(buf, 0, IOTools.BUFSIZE);
        while (n > 0) {
            out.write(buf, 0, n);
            n = in.read(buf, 0, IOTools.BUFSIZE);
        }
        
        out.flush();        
    }        
}

Java Source Code List