com.codename1.impl.ios.NSDataOutputStream Maven / Gradle / Ivy
/*
* Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Codename One designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.impl.ios;
import com.codename1.io.FileSystemStorage;
import com.codename1.io.Util;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Implements the output stream interface on top of NSData
*
* @author Shai Almog
*/
public class NSDataOutputStream extends OutputStream {
private String file;
private boolean written;
public NSDataOutputStream(String file) {
this.file = file;
}
public NSDataOutputStream(String file, int offset) throws IOException {
this.file = file;
if(offset > 0) {
long l = FileSystemStorage.getInstance().getLength(file);
if(l < offset) {
byte[] data = new byte[offset];
InputStream is = FileSystemStorage.getInstance().openInputStream(file);
Util.readAll(is, data);
is.close();
write(data);
} else {
written = true;
}
}
}
@Override
public void write(int b) throws IOException {
write(new byte[] {(byte)b});
}
@Override
public void write(byte[] b) throws IOException {
if(written) {
IOSImplementation.nativeInstance.appendToFile(b, file);
} else {
IOSImplementation.nativeInstance.writeToFile(b, file);
}
written = true;
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
if(off == 0 && len == b.length) {
write(b);
return;
}
byte[] arr = new byte[len];
System.arraycopy(b, off, arr, 0, len);
write(arr);
}
@Override
public void close() throws IOException {
if(!written && !IOSImplementation.nativeInstance.fileExists(file)) {
IOSImplementation.nativeInstance.writeToFile(new byte[0], file);
}
super.close();
}
}