| /* |
| * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.imageio.stream; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import com.sun.imageio.stream.CloseableDisposerRecord; |
| import com.sun.imageio.stream.StreamFinalizer; |
| import sun.java2d.Disposer; |
| |
| /** |
| * An implementation of {@code ImageOutputStream} that writes its |
| * output directly to a {@code File} or |
| * {@code RandomAccessFile}. |
| * |
| */ |
| public class FileImageOutputStream extends ImageOutputStreamImpl { |
| |
| private RandomAccessFile raf; |
| |
| /** The referent to be registered with the Disposer. */ |
| private final Object disposerReferent; |
| |
| /** The DisposerRecord that closes the underlying RandomAccessFile. */ |
| private final CloseableDisposerRecord disposerRecord; |
| |
| /** |
| * Constructs a {@code FileImageOutputStream} that will write |
| * to a given {@code File}. |
| * |
| * @param f a {@code File} to write to. |
| * |
| * @exception IllegalArgumentException if {@code f} is |
| * {@code null}. |
| * @exception SecurityException if a security manager exists |
| * and does not allow write access to the file. |
| * @exception FileNotFoundException if {@code f} does not denote |
| * a regular file or it cannot be opened for reading and writing for any |
| * other reason. |
| * @exception IOException if an I/O error occurs. |
| */ |
| public FileImageOutputStream(File f) |
| throws FileNotFoundException, IOException { |
| this(f == null ? null : new RandomAccessFile(f, "rw")); |
| } |
| |
| /** |
| * Constructs a {@code FileImageOutputStream} that will write |
| * to a given {@code RandomAccessFile}. |
| * |
| * @param raf a {@code RandomAccessFile} to write to. |
| * |
| * @exception IllegalArgumentException if {@code raf} is |
| * {@code null}. |
| */ |
| public FileImageOutputStream(RandomAccessFile raf) { |
| if (raf == null) { |
| throw new IllegalArgumentException("raf == null!"); |
| } |
| this.raf = raf; |
| |
| disposerRecord = new CloseableDisposerRecord(raf); |
| if (getClass() == FileImageOutputStream.class) { |
| disposerReferent = new Object(); |
| Disposer.addRecord(disposerReferent, disposerRecord); |
| } else { |
| disposerReferent = new StreamFinalizer(this); |
| } |
| } |
| |
| public int read() throws IOException { |
| checkClosed(); |
| bitOffset = 0; |
| int val = raf.read(); |
| if (val != -1) { |
| ++streamPos; |
| } |
| return val; |
| } |
| |
| public int read(byte[] b, int off, int len) throws IOException { |
| checkClosed(); |
| bitOffset = 0; |
| int nbytes = raf.read(b, off, len); |
| if (nbytes != -1) { |
| streamPos += nbytes; |
| } |
| return nbytes; |
| } |
| |
| public void write(int b) throws IOException { |
| flushBits(); // this will call checkClosed() for us |
| raf.write(b); |
| ++streamPos; |
| } |
| |
| public void write(byte[] b, int off, int len) throws IOException { |
| flushBits(); // this will call checkClosed() for us |
| raf.write(b, off, len); |
| streamPos += len; |
| } |
| |
| public long length() { |
| try { |
| checkClosed(); |
| return raf.length(); |
| } catch (IOException e) { |
| return -1L; |
| } |
| } |
| |
| /** |
| * Sets the current stream position and resets the bit offset to |
| * 0. It is legal to seeking past the end of the file; an |
| * {@code EOFException} will be thrown only if a read is |
| * performed. The file length will not be increased until a write |
| * is performed. |
| * |
| * @exception IndexOutOfBoundsException if {@code pos} is smaller |
| * than the flushed position. |
| * @exception IOException if any other I/O error occurs. |
| */ |
| public void seek(long pos) throws IOException { |
| checkClosed(); |
| if (pos < flushedPos) { |
| throw new IndexOutOfBoundsException("pos < flushedPos!"); |
| } |
| bitOffset = 0; |
| raf.seek(pos); |
| streamPos = raf.getFilePointer(); |
| } |
| |
| public void close() throws IOException { |
| super.close(); |
| disposerRecord.dispose(); // this closes the RandomAccessFile |
| raf = null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @deprecated The {@code finalize} method has been deprecated. |
| * Subclasses that override {@code finalize} in order to perform cleanup |
| * should be modified to use alternative cleanup mechanisms and |
| * to remove the overriding {@code finalize} method. |
| * When overriding the {@code finalize} method, its implementation must explicitly |
| * ensure that {@code super.finalize()} is invoked as described in {@link Object#finalize}. |
| * See the specification for {@link Object#finalize()} for further |
| * information about migration options. |
| */ |
| @Deprecated(since="9") |
| protected void finalize() throws Throwable { |
| // Empty finalizer: for performance reasons we instead use the |
| // Disposer mechanism for ensuring that the underlying |
| // RandomAccessFile is closed prior to garbage collection |
| } |
| } |