001    package railo.runtime.functions.file;
002    
003    import java.io.BufferedOutputStream;
004    import java.io.File;
005    import java.io.IOException;
006    import java.io.InputStream;
007    import java.io.RandomAccessFile;
008    
009    import railo.commons.io.IOUtil;
010    import railo.commons.io.res.Resource;
011    import railo.runtime.exp.PageException;
012    import railo.runtime.op.Caster;
013    import railo.runtime.op.Decision;
014    
015    public class FileStreamWrapperWrite extends FileStreamWrapper {
016            
017            private BufferedOutputStream bos;
018            private boolean append;
019            private String charset;
020            private boolean seekable;
021            private RandomAccessFile raf;
022    
023            public FileStreamWrapperWrite(Resource res, String charset,boolean append,boolean seekable) {
024                    super(res);
025                    
026                    this.charset=charset;
027                    this.append=append;
028                    this.seekable=seekable;
029            }
030            
031    
032            @Override
033            public void write(Object obj) throws IOException {
034                    byte[] bytes = null;
035                    InputStream is=null;
036                    if(Decision.isBinary(obj)){
037                            bytes=Caster.toBinary(obj,null);
038                    }
039                    else if(obj instanceof FileStreamWrapper) {
040                            is=((FileStreamWrapper)obj).getResource().getInputStream();
041                    }
042                    else if(obj instanceof Resource) {
043                            is=((Resource)obj).getInputStream();
044                    }
045                    else if(Decision.isSimpleValue(obj)){
046                            String str = Caster.toString(obj,null);
047                            if(str!=null) bytes=str.getBytes(charset);
048                    }
049                    
050                    if(bytes!=null){
051                            if(seekable)getRAF().write(bytes);
052                            else _getOS().write(bytes);
053                    }
054                    else if(is!=null){
055                            if(seekable)writeToRAF(is, getRAF());
056                            else IOUtil.copy(is, _getOS(),true,false);
057                    }
058                    else
059                            throw new IOException("can't write down object of type ["+Caster.toTypeName(obj)+"] to resource ["+res+"]");
060                    
061                    
062                    
063                    
064            }
065    
066            public void close() throws IOException {
067                    if(bos!=null)bos.close();
068                    if(raf!=null)raf.close();
069            }
070    
071            @Override
072            public String getMode() {
073                    return append?"append":"write";
074            }
075            
076            @Override
077            public void skip(int len) throws PageException {
078                    if(seekable){
079                            try {
080                                    getRAF().skipBytes(len);
081                            } catch (IOException e) {
082                                    throw Caster.toPageException(e);
083                            }
084                    }       
085                    else throw Caster.toPageException(new IOException("skip is only supported when you have set argument seekable of function fileOpen to true"));
086            }
087            public void seek(long pos) throws PageException {
088                    if(seekable){
089                            try {
090                                    getRAF().seek(pos);
091                            } catch (IOException e) {
092                                    throw Caster.toPageException(e);
093                            }
094                    }
095                    else throw Caster.toPageException(new IOException("seek is only supported when you have set argument seekable of function fileOpen to true"));
096            }
097            
098            public static void writeToRAF(InputStream is, RandomAccessFile raf) throws IOException   {  
099            
100            byte[] buffer = new byte[2048];  
101            int tmp=0;  
102       
103            while ((tmp = is.read(buffer)) != -1)   {  
104              raf.write(buffer, 0, tmp);  
105            }   
106        } 
107            
108            private RandomAccessFile getRAF() throws IOException {
109                    if(raf==null){
110                            if(!(res instanceof File))
111                                    throw new IOException("only resources for local filesytem support seekable");
112                            
113                            raf = new RandomAccessFile((File)res,"rw");
114                            if(append)raf.seek(res.length());
115                    }
116                    return raf;
117            }
118    
119            private BufferedOutputStream _getOS() throws IOException{
120                    if(bos==null)
121                            bos = IOUtil.toBufferedOutputStream(res.getOutputStream(append));
122                    return bos;
123            }
124    }