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src/java.base/share/classes/java/io/FilterOutputStream.java

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   1 /*
   2  * Copyright (c) 1994, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  50     /**
  51      * Whether the stream is closed; implicitly initialized to false.
  52      */
  53     private volatile boolean closed;
  54 
  55     /**
  56      * Object used to prevent a race on the 'closed' instance variable.
  57      */
  58     private final Object closeLock = new Object();
  59 
  60     /**
  61      * Creates an output stream filter built on top of the specified
  62      * underlying output stream.
  63      *
  64      * @param   out   the underlying output stream to be assigned to
  65      *                the field {@code this.out} for later use, or
  66      *                <code>null</code> if this instance is to be
  67      *                created without an underlying stream.
  68      */
  69     public FilterOutputStream(OutputStream out) {




  70         this.out = out;
  71     }
  72 
  73     /**
  74      * Writes the specified <code>byte</code> to this output stream.
  75      * <p>
  76      * The <code>write</code> method of <code>FilterOutputStream</code>
  77      * calls the <code>write</code> method of its underlying output stream,
  78      * that is, it performs {@code out.write(b)}.
  79      * <p>
  80      * Implements the abstract {@code write} method of {@code OutputStream}.
  81      *
  82      * @param      b   the <code>byte</code>.
  83      * @exception  IOException  if an I/O error occurs.
  84      */
  85     @Override
  86     public void write(int b) throws IOException {
  87         out.write(b);
  88     }
  89 


   1 /*
   2  * Copyright (c) 1994, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  50     /**
  51      * Whether the stream is closed; implicitly initialized to false.
  52      */
  53     private volatile boolean closed;
  54 
  55     /**
  56      * Object used to prevent a race on the 'closed' instance variable.
  57      */
  58     private final Object closeLock = new Object();
  59 
  60     /**
  61      * Creates an output stream filter built on top of the specified
  62      * underlying output stream.
  63      *
  64      * @param   out   the underlying output stream to be assigned to
  65      *                the field {@code this.out} for later use, or
  66      *                <code>null</code> if this instance is to be
  67      *                created without an underlying stream.
  68      */
  69     public FilterOutputStream(OutputStream out) {
  70         if (out == null) {
  71             throw new NullPointerException();
  72         }
  73 
  74         this.out = out;
  75     }
  76 
  77     /**
  78      * Writes the specified <code>byte</code> to this output stream.
  79      * <p>
  80      * The <code>write</code> method of <code>FilterOutputStream</code>
  81      * calls the <code>write</code> method of its underlying output stream,
  82      * that is, it performs {@code out.write(b)}.
  83      * <p>
  84      * Implements the abstract {@code write} method of {@code OutputStream}.
  85      *
  86      * @param      b   the <code>byte</code>.
  87      * @exception  IOException  if an I/O error occurs.
  88      */
  89     @Override
  90     public void write(int b) throws IOException {
  91         out.write(b);
  92     }
  93 


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