package railo.runtime.functions.file;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;
import railo.commons.io.IOUtil;
import railo.commons.io.res.Resource;
import railo.runtime.exp.PageException;
import railo.runtime.op.Caster;
import railo.runtime.op.Decision;
public class FileStreamWrapperWrite extends FileStreamWrapper {
private BufferedOutputStream bos;
private boolean append;
private String charset;
private boolean seekable;
private RandomAccessFile raf;
public FileStreamWrapperWrite(Resource res, String charset,boolean append,boolean seekable) {
super(res);
this.charset=charset;
this.append=append;
this.seekable=seekable;
}
@Override
public void write(Object obj) throws IOException {
byte[] bytes = null;
InputStream is=null;
if(Decision.isBinary(obj)){
bytes=Caster.toBinary(obj,null);
}
else if(obj instanceof FileStreamWrapper) {
is=((FileStreamWrapper)obj).getResource().getInputStream();
}
else if(obj instanceof Resource) {
is=((Resource)obj).getInputStream();
}
else if(Decision.isSimpleValue(obj)){
String str = Caster.toString(obj,null);
if(str!=null) bytes=str.getBytes(charset);
}
if(bytes!=null){
if(seekable)getRAF().write(bytes);
else _getOS().write(bytes);
}
else if(is!=null){
if(seekable)writeToRAF(is, getRAF());
else IOUtil.copy(is, _getOS(),true,false);
}
else
throw new IOException("can't write down object of type ["+Caster.toTypeName(obj)+"] to resource ["+res+"]");
}
public void close() throws IOException {
if(bos!=null)bos.close();
if(raf!=null)raf.close();
}
@Override
public String getMode() {
return append?"append":"write";
}
@Override
public void skip(int len) throws PageException {
if(seekable){
try {
getRAF().skipBytes(len);
} catch (IOException e) {
throw Caster.toPageException(e);
}
}
else throw Caster.toPageException(new IOException("skip is only supported when you have set argument seekable of function fileOpen to true"));
}
public void seek(long pos) throws PageException {
if(seekable){
try {
getRAF().seek(pos);
} catch (IOException e) {
throw Caster.toPageException(e);
}
}
else throw Caster.toPageException(new IOException("seek is only supported when you have set argument seekable of function fileOpen to true"));
}
public static void writeToRAF(InputStream is, RandomAccessFile raf) throws IOException {
byte[] buffer = new byte[2048];
int tmp=0;
while ((tmp = is.read(buffer)) != -1) {
raf.write(buffer, 0, tmp);
}
}
private RandomAccessFile getRAF() throws IOException {
if(raf==null){
if(!(res instanceof File))
throw new IOException("only resources for local filesytem support seekable");
raf = new RandomAccessFile((File)res,"rw");
if(append)raf.seek(res.length());
}
return raf;
}
private BufferedOutputStream _getOS() throws IOException{
if(bos==null)
bos = IOUtil.toBufferedOutputStream(res.getOutputStream(append));
return bos;
}
}