org.robovm.compiler.util.io.OpenOnWriteFileOutputStream Maven / Gradle / Ivy
/*
* Copyright (C) 2012 Trillian Mobile AB
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program. If not, see .
*/
package org.robovm.compiler.util.io;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* {@link OutputStream} which writes to a {@link FileOutputStream} but
* defers opening the {@link FileOutputStream} until the first write.
*/
public class OpenOnWriteFileOutputStream extends OutputStream {
private final File file;
private OutputStream out;
public OpenOnWriteFileOutputStream(File file) {
this.file = file;
}
private void ensureOpen() throws IOException {
if (out == null) {
out = new FileOutputStream(file);
}
}
public void close() throws IOException {
ensureOpen();
out.close();
}
public void flush() throws IOException {
ensureOpen();
out.flush();
}
public void write(int b) throws IOException {
ensureOpen();
out.write(b);
}
public void write(byte[] b) throws IOException {
ensureOpen();
out.write(b);
}
public void write(byte[] b, int off, int len) throws IOException {
ensureOpen();
out.write(b, off, len);
}
}