/**
*
* Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
*
* 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, see <http://www.gnu.org/licenses/>.
*
**/
package lucee.runtime.functions.file;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;
import lucee.commons.io.res.Resource;
import lucee.runtime.exp.PageException;
import lucee.runtime.op.Caster;
import lucee.runtime.op.Decision;
public class FileStreamWrapperReadWrite extends FileStreamWrapper {
//private BufferedOutputStream bos;
private String charset;
private boolean seekable;
private RandomAccessFile raf;
private boolean isEOF;
public FileStreamWrapperReadWrite(Resource res, String charset,boolean seekable) {
super(res);
this.charset=charset;
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,false,null);
if(str!=null) bytes=str.getBytes(charset);
}
if(bytes!=null){
getRAF().write(bytes);
}
else if(is!=null){
writeToRAF(is, getRAF());
}
else
throw new IOException("can't write down object of type ["+Caster.toTypeName(obj)+"] to resource ["+res+"]");
}
@Override
public void close() throws IOException {
if(raf!=null)raf.close();
}
@Override
public String getMode() {
return "readwrite";
}
@Override
public Object read(int len) throws IOException {
byte[] barr=new byte[len];
len=getRAF().read(barr);
if(len!=barr.length) {
byte[] rtn=new byte[len];
for(int i=0;i<len;i++) {
rtn[i]=barr[i];
}
barr=rtn;
isEOF=true;
}
return barr;
}
@Override
public boolean isEndOfFile() {
return isEOF;
}
@Override
public long getSize() {
return res.length();
}
@Override
public void skip(int len) throws PageException {
try {
getRAF().skipBytes(len);
} catch (IOException e) {
throw Caster.toPageException(e);
}
}
@Override
public void seek(long pos) throws PageException {
try {
getRAF().seek(pos);
} catch (IOException e) {
throw Caster.toPageException(e);
}
}
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");
}
return raf;
}
}