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BEGIN LICENSE BLOCK ***** Version: CPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Common Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.eclipse.org/legal/cpl-v10.html Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2006 Ola Bini <Ola.Bini@ki.se> Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the CPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the CPL, the GPL or the LGPL. END LICENSE BLOCK ***
 
 package org.jruby.util;
 
This class wraps a IRubyObject in an OutputStream. Depending on which messages the IRubyObject answers to, it will have different functionality. The point is that the IRubyObject could exhibit duck typing, in the style of IO versus StringIO, for example. At the moment, the only functionality supported is writing, and the only requirement on the io-object is that it responds to write() and close() like IO.

Author(s):
Ola Bini
 
 public class IOOutputStream extends OutputStream {
     private final IRubyObject io;
     private final OutputStream out;
     private final CallSite writeAdapter;
     private static final CallSite closeAdapter = MethodIndex.getFunctionalCallSite("close");

    
Creates a new OutputStream with the object provided.

Parameters:
io the ruby object
 
     public IOOutputStream(final IRubyObject ioboolean checkAppendboolean verifyCanWrite) {
         this. = io;
         CallSite writeSite = MethodIndex.getFunctionalCallSite("write");
         if (io.respondsTo("write")) {
              = writeSite;
         } else if (checkAppend && io.respondsTo("<<")) {
              = MethodIndex.getFunctionalCallSite("<<");
         } else if (verifyCanWrite) {
             throw io.getRuntime().newArgumentError("Object: " + io + " is not a legal argument to this wrapper, " +
                         "cause it doesn't respond to \"write\".");
         } else {
              = writeSite;
         }
         this. = io instanceof RubyIO && !((RubyIO)io).isClosed() && ((RubyIO)io).isBuiltin("write") ? ((RubyIOio).getOutStream() : null;
     }

    
Creates a new OutputStream with the object provided.

Parameters:
io the ruby object
 
     public IOOutputStream(final IRubyObject io) {
         this(iotruetrue);
     }
 
     public void write(final int bitethrows IOException {
         if ( != null) {
             .write(bite);
         } else {
             .call(.getRuntime().getCurrentContext(), ,
                     RubyString.newStringLight(.getRuntime(), new ByteList(new byte[]{(byte)bite},false)));
         }
     }
 
     @Override
     public void write(final byte[] bthrows IOException {
         write(b,0,b.length);
     }
 
     @Override
    public void write(final byte[] b,final int offfinal int lenthrows IOException {
        if ( != null) {
            .write(bofflen);
        } else {
            .call(.getRuntime().getCurrentContext(), , RubyString.newStringLight(.getRuntime(), new ByteList(bofflenfalse)));
        }
    }
    
    @Override
    public void close() throws IOException {
        if ( != null) {
            .close();
        } else if (.respondsTo("close")) {
            .call(.getRuntime().getCurrentContext(), );
        }
    }
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