diff options
Diffstat (limited to 'src/java/com')
| -rw-r--r-- | src/java/com/jogamp/common/nio/MappedByteBufferInputStream.java | 395 | ||||
| -rw-r--r-- | src/java/com/jogamp/common/nio/MappedByteBufferOutputStream.java | 156 |
2 files changed, 462 insertions, 89 deletions
diff --git a/src/java/com/jogamp/common/nio/MappedByteBufferInputStream.java b/src/java/com/jogamp/common/nio/MappedByteBufferInputStream.java index 5ac1ffb..67cbbbe 100644 --- a/src/java/com/jogamp/common/nio/MappedByteBufferInputStream.java +++ b/src/java/com/jogamp/common/nio/MappedByteBufferInputStream.java @@ -29,11 +29,14 @@ package com.jogamp.common.nio; import java.io.IOException; import java.io.InputStream; +import java.io.PrintStream; +import java.io.RandomAccessFile; import java.lang.ref.WeakReference; import java.lang.reflect.Method; import java.nio.ByteBuffer; import java.nio.MappedByteBuffer; import java.nio.channels.FileChannel; +import java.nio.channels.FileChannel.MapMode; import java.security.AccessController; import java.security.PrivilegedAction; @@ -93,6 +96,24 @@ public class MappedByteBufferInputStream extends InputStream { }; /** + * File resize interface allowing a file to change its size, + * e.g. via {@link RandomAccessFile#setLength(long)}. + */ + public static interface FileResizeOp { + /** + * @param newSize the new file size + * @throws IOException if file size change is not supported or any other I/O error occurs + */ + void setLength(final long newSize) throws IOException; + } + private static final FileResizeOp NoFileResize = new FileResizeOp() { + @Override + public void setLength(final long newSize) throws IOException { + throw new IOException("file size change not supported"); + } + }; + + /** * Default slice shift, i.e. 1L << shift, denoting slice size in MiB: * <ul> * <li>{@link Platform#is64Bit() 64bit machines} -> 30 = 1024 MiB</li> @@ -110,7 +131,7 @@ public class MappedByteBufferInputStream extends InputStream { */ public static final int DEFAULT_SLICE_SHIFT; - private static final boolean DEBUG; + static final boolean DEBUG; static { Platform.initSingleton(); @@ -126,10 +147,14 @@ public class MappedByteBufferInputStream extends InputStream { private final int sliceShift; private final FileChannel fc; private final FileChannel.MapMode mmode; - private final MappedByteBuffer[] slices; - private final WeakReference<MappedByteBuffer>[] slices2GC; - private final int sliceCount; - private final long totalSize; + private FileResizeOp fileResizeOp = NoFileResize; + + private int sliceCount; + ByteBuffer[] slices; + private WeakReference<ByteBuffer>[] slices2GC; + private long totalSize; + + private int refCount; private Method mbbCleaner; private Method cClean; @@ -137,24 +162,47 @@ public class MappedByteBufferInputStream extends InputStream { private boolean hasCleaner; private CacheMode cmode; - private int currSlice; + int currSlice; private long mark; - @SuppressWarnings("unchecked") + public final void dbgDump(final String prefix, final PrintStream out) { + long fcSz = 0, pos = 0, rem = 0; + try { + fcSz = fc.size(); + } catch (final IOException e) { + e.printStackTrace(); + } + if( 0 < refCount ) { + try { + pos = position(); + rem = totalSize - pos; + } catch (final IOException e) { + e.printStackTrace(); + } + } + final int sliceCount2 = null != slices ? slices.length : 0; + out.println(prefix+" refCount "+refCount+", fcSize "+fcSz+", totalSize "+totalSize); + out.println(prefix+" position "+pos+", remaining "+rem); + out.println(prefix+" mmode "+mmode+", cmode "+cmode+", fileResizeOp "+fileResizeOp); + out.println(prefix+" slice "+currSlice+" / "+sliceCount+" ("+sliceCount2+")"); + out.println(prefix+" sliceShift "+sliceShift+" -> "+(1L << sliceShift)); + } + MappedByteBufferInputStream(final FileChannel fc, final FileChannel.MapMode mmode, final CacheMode cmode, - final int sliceShift, final MappedByteBuffer[] bufs, final long totalSize, - final int currSlice) throws IOException { + final int sliceShift, final long totalSize, final int currSlice) throws IOException { this.sliceShift = sliceShift; this.fc = fc; this.mmode = mmode; - this.slices = bufs; - this.sliceCount = bufs.length; - this.slices2GC = new WeakReference[sliceCount]; - this.totalSize = totalSize; - if( 0 >= totalSize || 0 >= sliceCount ) { - throw new IllegalArgumentException("Zero sized: total "+totalSize+", slices "+sliceCount); + + if( 0 > totalSize ) { + throw new IllegalArgumentException("Negative size "+totalSize); } + // trigger notifyLengthChange + this.totalSize = -1; + this.sliceCount = 0; + notifyLengthChange(totalSize); + this.refCount = 1; this.cleanerInit = false; this.hasCleaner = false; this.cmode = cmode; @@ -166,82 +214,209 @@ public class MappedByteBufferInputStream extends InputStream { } /** - * Creates a new instance using the given {@link FileChannel}, - * {@link FileChannel.MapMode#READ_ONLY read-only} mapping mode, {@link CacheMode#FLUSH_PRE_SOFT} - * and the {@link #DEFAULT_SLICE_SHIFT}. + * Creates a new instance using the given {@link FileChannel}. * <p> - * The {@link MappedByteBuffer} slices will be mapped {@link FileChannel.MapMode#READ_ONLY} lazily at first usage. + * The {@link MappedByteBuffer} slices will be mapped lazily at first usage. * </p> - * @param fileChannel the file channel to be used. + * @param fileChannel the file channel to be mapped lazily. + * @param mmode the map mode, default is {@link FileChannel.MapMode#READ_ONLY}. + * @param cmode the caching mode, default is {@link CacheMode#FLUSH_PRE_SOFT}. + * @param sliceShift the pow2 slice size, default is {@link #DEFAULT_SLICE_SHIFT}. * @throws IOException */ - public static MappedByteBufferInputStream create(final FileChannel fileChannel) throws IOException { - return create(fileChannel, FileChannel.MapMode.READ_ONLY, CacheMode.FLUSH_PRE_SOFT, DEFAULT_SLICE_SHIFT); + public MappedByteBufferInputStream(final FileChannel fileChannel, + final FileChannel.MapMode mmode, + final CacheMode cmode, + final int sliceShift) throws IOException { + this(fileChannel, mmode, cmode, sliceShift, fileChannel.size(), 0); } /** * Creates a new instance using the given {@link FileChannel}, - * {@link FileChannel.MapMode#READ_ONLY read-only} mapping mode and the {@link #DEFAULT_SLICE_SHIFT}. + * given mapping-mode, given cache-mode and the {@link #DEFAULT_SLICE_SHIFT}. * <p> - * The {@link MappedByteBuffer} slices will be mapped {@link FileChannel.MapMode#READ_ONLY} lazily at first usage. + * The {@link MappedByteBuffer} slices will be mapped lazily at first usage. * </p> * @param fileChannel the file channel to be used. + * @param mmode the map mode, default is {@link FileChannel.MapMode#READ_ONLY}. * @param cmode the caching mode, default is {@link CacheMode#FLUSH_PRE_SOFT}. * @throws IOException */ - public static MappedByteBufferInputStream create(final FileChannel fileChannel, final CacheMode cmode) throws IOException { - return create(fileChannel, FileChannel.MapMode.READ_ONLY, cmode, DEFAULT_SLICE_SHIFT); + public MappedByteBufferInputStream(final FileChannel fileChannel, final FileChannel.MapMode mmode, final CacheMode cmode) throws IOException { + this(fileChannel, mmode, cmode, DEFAULT_SLICE_SHIFT); } /** - * Creates a new instance using the given {@link FileChannel}. + * Creates a new instance using the given {@link FileChannel}, + * {@link FileChannel.MapMode#READ_ONLY read-only} mapping mode, {@link CacheMode#FLUSH_PRE_SOFT} + * and the {@link #DEFAULT_SLICE_SHIFT}. * <p> - * The {@link MappedByteBuffer} slices will be mapped lazily at first usage. + * The {@link MappedByteBuffer} slices will be mapped {@link FileChannel.MapMode#READ_ONLY} lazily at first usage. * </p> - * @param fileChannel the file channel to be mapped lazily. - * @param mmode the map mode, default is {@link FileChannel.MapMode#READ_ONLY}. - * @param cmode the caching mode, default is {@link CacheMode#FLUSH_PRE_SOFT}. - * @param sliceShift the pow2 slice size, default is {@link #DEFAULT_SLICE_SHIFT}. + * @param fileChannel the file channel to be used. * @throws IOException */ - public static MappedByteBufferInputStream create(final FileChannel fileChannel, - final FileChannel.MapMode mmode, - final CacheMode cmode, - final int sliceShift) throws IOException { - final long sliceSize = 1L << sliceShift; - final long totalSize = fileChannel.size(); - final int sliceCount = (int)( ( totalSize + ( sliceSize - 1 ) ) / sliceSize ); - final MappedByteBuffer[] bufs = new MappedByteBuffer[ sliceCount ]; - return new MappedByteBufferInputStream(fileChannel, mmode, cmode, sliceShift, bufs, totalSize, 0); + public MappedByteBufferInputStream(final FileChannel fileChannel) throws IOException { + this(fileChannel, FileChannel.MapMode.READ_ONLY, CacheMode.FLUSH_PRE_SOFT, DEFAULT_SLICE_SHIFT); + } + + final synchronized void checkOpen() throws IOException { + if( 0 == refCount ) { + throw new IOException("stream closed"); + } } @Override public final synchronized void close() throws IOException { - for(int i=0; i<sliceCount; i++) { - final MappedByteBuffer s = slices[i]; - if( null != s ) { - slices[i] = null; - cleanBuffer(s); + if( 0 < refCount ) { + refCount--; + if( 0 == refCount ) { + for(int i=0; i<sliceCount; i++) { + cleanSlice(i); + } + if( mmode != FileChannel.MapMode.READ_ONLY ) { + fc.force(true); + } + fc.close(); + mark = -1; + currSlice = -1; + super.close(); } - slices2GC[i] = null; } + } + + /** + * @param fileResizeOp the new {@link FileResizeOp}. + * @throws IllegalStateException if attempting to set the {@link FileResizeOp} to a different value than before + */ + public final synchronized void setFileResizeOp(final FileResizeOp fileResizeOp) throws IllegalStateException { + if( NoFileResize != this.fileResizeOp && this.fileResizeOp != fileResizeOp ) { + throw new IllegalStateException("FileResizeOp already set, this value differs"); + } + this.fileResizeOp = null != fileResizeOp ? fileResizeOp : NoFileResize; + } + + /** + * Resize the underlying {@link FileChannel}'s size and adjusting this instance + * via {@link #notifyLengthChange(long) accordingly}. + * <p> + * User must have a {@link FileResizeOp} {@link #setFileResizeOp(FileResizeOp) registered} before. + * </p> + * @param newTotalSize the new total size + * @throws IOException if no {@link FileResizeOp} has been {@link #setFileResizeOp(FileResizeOp) registered} + * or if a buffer slice operation failed + */ + public final synchronized void setLength(final long newTotalSize) throws IOException { + if( fc.size() != newTotalSize ) { + fileResizeOp.setLength(newTotalSize); + } + notifyLengthChange(newTotalSize); + } + + /** + * Notify this instance that the underlying {@link FileChannel}'s size has been changed + * and adjusting this instances buffer slices and states accordingly. + * <p> + * Should be called by user API when aware of such event. + * </p> + * @param newTotalSize the new total size + * @throws IOException if a buffer slice operation failed + */ + public final synchronized void notifyLengthChange(final long newTotalSize) throws IOException { + /* if( DEBUG ) { + System.err.println("notifyLengthChange.0: "+totalSize+" -> "+newTotalSize); + dbgDump("notifyLengthChange.0:", System.err); + } */ + if( totalSize == newTotalSize ) { + // NOP + return; + } else if( 0 == newTotalSize ) { + // ZERO - ensure one entry avoiding NULL checks + if( null != slices ) { + for(int i=0; i<sliceCount; i++) { + cleanSlice(i); + } + } + @SuppressWarnings("unchecked") + final WeakReference<ByteBuffer>[] newSlices2GC = new WeakReference[ 1 ]; + slices2GC = newSlices2GC; + slices = new ByteBuffer[1]; + slices[0] = ByteBuffer.allocate(0); + sliceCount = 0; + totalSize = 0; + mark = -1; + currSlice = 0; + } else { + final long prePosition = position(); + + final long sliceSize = 1L << sliceShift; + final int newSliceCount = (int)( ( newTotalSize + ( sliceSize - 1 ) ) / sliceSize ); + @SuppressWarnings("unchecked") + final WeakReference<ByteBuffer>[] newSlices2GC = new WeakReference[ newSliceCount ]; + final MappedByteBuffer[] newSlices = new MappedByteBuffer[ newSliceCount ]; + final int copySliceCount = Math.min(newSliceCount, sliceCount-1); // drop last (resize) + if( 0 < copySliceCount ) { + System.arraycopy(slices2GC, 0, newSlices2GC, 0, copySliceCount); + System.arraycopy(slices, 0, newSlices, 0, copySliceCount); + for(int i=copySliceCount; i<sliceCount; i++) { // clip shrunken slices + 1 (last), incl. slices2GC! + cleanSlice(i); + } + } + slices2GC = newSlices2GC; + slices = newSlices; + sliceCount = newSliceCount; + totalSize = newTotalSize; + if( newTotalSize < mark ) { + mark = -1; + } + positionImpl( Math.min(prePosition, newTotalSize) ); // -> clipped position (set currSlice and re-map/-pos buffer) + } + /* if( DEBUG ) { + System.err.println("notifyLengthChange.X: "+slices[currSlice]); + dbgDump("notifyLengthChange.X:", System.err); + } */ + } + + /** + * + * @throws IOException if this stream has been {@link #close() closed}. + */ + public final synchronized void flush() throws IOException { + checkOpen(); if( mmode != FileChannel.MapMode.READ_ONLY ) { fc.force(true); } - fc.close(); - mark = -1; - currSlice = -1; - super.close(); } - private synchronized MappedByteBuffer slice(final int i) throws IOException { + /** + * Returns a new MappedByteBufferOutputStream instance sharing + * all resources of this input stream, including all buffer slices. + * + * @throws IllegalStateException if attempting to set the {@link FileResizeOp} to a different value than before + * @throws IOException if this instance was opened w/ {@link FileChannel.MapMode#READ_ONLY} + * or if this stream has been {@link #close() closed}. + */ + public final synchronized MappedByteBufferOutputStream getOutputStream(final FileResizeOp fileResizeOp) + throws IllegalStateException, IOException + { + if( FileChannel.MapMode.READ_ONLY == mmode ) { + throw new IOException("FileChannel map-mode is read-only"); + } + checkOpen(); + setFileResizeOp(fileResizeOp); + refCount++; + this.fileResizeOp = null != fileResizeOp ? fileResizeOp : NoFileResize; + return new MappedByteBufferOutputStream(this); + } + + final synchronized ByteBuffer slice(final int i) throws IOException { if ( null != slices[i] ) { return slices[i]; } else { if( CacheMode.FLUSH_PRE_SOFT == cmode ) { - final WeakReference<MappedByteBuffer> ref = slices2GC[i]; + final WeakReference<ByteBuffer> ref = slices2GC[i]; if( null != ref ) { - final MappedByteBuffer mbb = ref.get(); + final ByteBuffer mbb = ref.get(); slices2GC[i] = null; if( null != mbb ) { slices[i] = mbb; @@ -254,22 +429,42 @@ public class MappedByteBufferInputStream extends InputStream { return slices[i]; } } + final synchronized boolean nextSlice() throws IOException { + if ( currSlice < sliceCount - 1 ) { + if( CacheMode.FLUSH_NONE != cmode ) { + flushSlice(currSlice); + } + currSlice++; + slice( currSlice ).position( 0 ); + return true; + } else { + return false; + } + } private synchronized void flushSlice(final int i) throws IOException { - final MappedByteBuffer s = slices[i]; + final ByteBuffer s = slices[i]; if ( null != s ) { slices[i] = null; // GC a slice is enough if( CacheMode.FLUSH_PRE_HARD == cmode ) { if( !cleanBuffer(s) ) { cmode = CacheMode.FLUSH_PRE_SOFT; - slices2GC[i] = new WeakReference<MappedByteBuffer>(s); + slices2GC[i] = new WeakReference<ByteBuffer>(s); } } else { - slices2GC[i] = new WeakReference<MappedByteBuffer>(s); + slices2GC[i] = new WeakReference<ByteBuffer>(s); } } } - private synchronized boolean cleanBuffer(final MappedByteBuffer mbb) { + private synchronized void cleanSlice(final int i) { + final ByteBuffer s = slices[i]; + if( null != s ) { + slices[i] = null; + cleanBuffer(s); + } + slices2GC[i] = null; + } + private synchronized boolean cleanBuffer(final ByteBuffer mbb) { if( !cleanerInit ) { initCleaner(mbb); } @@ -335,7 +530,7 @@ public class MappedByteBufferInputStream extends InputStream { * </pre> */ // @Override - public final long length() { + public final synchronized long length() { return totalSize; } @@ -349,10 +544,10 @@ public class MappedByteBufferInputStream extends InputStream { * In contrast to {@link InputStream}'s {@link #available()} method, * this method returns the proper return type {@code long}. * </p> - * @throws IOException + * @throws IOException if a buffer slice operation failed. */ public final synchronized long remaining() throws IOException { - return totalSize - position(); + return 0 < refCount ? totalSize - position() : 0; } /** @@ -360,6 +555,7 @@ public class MappedByteBufferInputStream extends InputStream { * <p> * {@inheritDoc} * </p> + * @throws IOException if a buffer slice operation failed. */ @Override public final synchronized int available() throws IOException { @@ -372,11 +568,15 @@ public class MappedByteBufferInputStream extends InputStream { * <pre> * <code>0 <= {@link #position()} <= {@link #length()}</code> * </pre> - * @throws IOException + * @throws IOException if a buffer slice operation failed. */ // @Override public final synchronized long position() throws IOException { - return ( (long)currSlice << sliceShift ) + slice( currSlice ).position(); + if( 0 < refCount ) { + return ( (long)currSlice << sliceShift ) + slice( currSlice ).position(); + } else { + return 0; + } } /** @@ -386,26 +586,31 @@ public class MappedByteBufferInputStream extends InputStream { * </pre> * @param newPosition The new position, which must be non-negative and ≤ {@link #length()}. * @return this instance - * @throws IOException + * @throws IOException if a buffer slice operation failed or stream is {@link #close() closed}. */ // @Override public final synchronized MappedByteBufferInputStream position( final long newPosition ) throws IOException { + checkOpen(); if ( totalSize < newPosition || 0 > newPosition ) { throw new IllegalArgumentException("new position "+newPosition+" not within [0.."+totalSize+"]"); } final int preSlice = currSlice; + positionImpl( newPosition ); + if( CacheMode.FLUSH_NONE != cmode && preSlice != currSlice) { + flushSlice(preSlice); + } + return this; + } + private final synchronized void positionImpl( final long newPosition ) throws IOException { if ( totalSize == newPosition ) { - currSlice = sliceCount - 1; - final MappedByteBuffer s = slice( currSlice ); + // EOF, pos == maxPos + 1 + currSlice = Math.max(0, sliceCount - 1); // handle zero size + final ByteBuffer s = slice( currSlice ); s.position( s.capacity() ); } else { currSlice = (int)( newPosition >>> sliceShift ); slice( currSlice ).position( (int)( newPosition - ( (long)currSlice << sliceShift ) ) ); } - if( CacheMode.FLUSH_NONE != cmode && preSlice != currSlice) { - flushSlice(preSlice); - } - return this; } @Override @@ -413,25 +618,45 @@ public class MappedByteBufferInputStream extends InputStream { return true; } + /** + * {@inheritDoc} + * <p> + * <i>Parameter {@code readLimit} is not used in this implementation, + * since the whole file is memory mapped and no read limitation occurs.</i> + * </p> + */ @Override - public final synchronized void mark( final int unused ) { - try { - mark = position(); - } catch (final IOException e) { - throw new RuntimeException(e); // FIXME: oops + public final synchronized void mark( final int readlimit ) { + if( 0 < refCount ) { + try { + mark = position(); + } catch (final IOException e) { + throw new RuntimeException(e); // FIXME: oops + } } } + /** + * {@inheritDoc} + * @throws IOException if this stream has not been marked, + * a buffer slice operation failed or stream has been {@link #close() closed}. + */ @Override public final synchronized void reset() throws IOException { + checkOpen(); if ( mark == -1 ) { throw new IOException("mark not set"); } position( mark ); } + /** + * {@inheritDoc} + * @throws IOException if a buffer slice operation failed or stream is {@link #close() closed}. + */ @Override public final synchronized long skip( final long n ) throws IOException { + checkOpen(); if( 0 > n ) { return 0; } @@ -444,15 +669,9 @@ public class MappedByteBufferInputStream extends InputStream { @Override public final synchronized int read() throws IOException { + checkOpen(); if ( ! slice( currSlice ).hasRemaining() ) { - if ( currSlice < sliceCount - 1 ) { - final int preSlice = currSlice; - currSlice++; - slice( currSlice ).position( 0 ); - if( CacheMode.FLUSH_NONE != cmode ) { - flushSlice(preSlice); - } - } else { + if ( !nextSlice() ) { return -1; } } @@ -461,6 +680,7 @@ public class MappedByteBufferInputStream extends InputStream { @Override public final synchronized int read( final byte[] b, final int off, final int len ) throws IOException { + checkOpen(); if (b == null) { throw new NullPointerException(); } else if (off < 0 || len < 0 || len > b.length - off) { @@ -478,13 +698,10 @@ public class MappedByteBufferInputStream extends InputStream { while( read < maxLen ) { int currRem = slice( currSlice ).remaining(); if ( 0 == currRem ) { - final int preSlice = currSlice; - currSlice++; - slice( currSlice ).position( 0 ); - currRem = slice( currSlice ).remaining(); - if( CacheMode.FLUSH_NONE != cmode ) { - flushSlice(preSlice); + if ( !nextSlice() ) { + throw new InternalError("XX"); } + currRem = slice( currSlice ).remaining(); } slices[ currSlice ].get( b, off + read, Math.min( maxLen - read, currRem ) ); read += Math.min( maxLen - read, currRem ); diff --git a/src/java/com/jogamp/common/nio/MappedByteBufferOutputStream.java b/src/java/com/jogamp/common/nio/MappedByteBufferOutputStream.java new file mode 100644 index 0000000..498e9f7 --- /dev/null +++ b/src/java/com/jogamp/common/nio/MappedByteBufferOutputStream.java @@ -0,0 +1,156 @@ +/** + * Copyright 2014 JogAmp Community. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, this list + * of conditions and the following disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * The views and conclusions contained in the software and documentation are those of the + * authors and should not be interpreted as representing official policies, either expressed + * or implied, of JogAmp Community. + */ +package com.jogamp.common.nio; + +import java.io.IOException; +import java.io.OutputStream; + +public class MappedByteBufferOutputStream extends OutputStream { + private final MappedByteBufferInputStream parent; + + MappedByteBufferOutputStream(final MappedByteBufferInputStream stream) throws IOException { + this.parent = stream; + } + + /** + * See {@link MappedByteBufferInputStream#setLength(long)}. + */ + public final synchronized void setLength(final long newTotalSize) throws IOException { + parent.setLength(newTotalSize); + } + + /** + * See {@link MappedByteBufferInputStream#notifyLengthChange(long)}. + */ + public final synchronized void notifyLengthChange(final long newTotalSize) throws IOException { + parent.notifyLengthChange(newTotalSize); + } + + /** + * See {@link MappedByteBufferInputStream#length()}. + */ + public final synchronized long length() { + return parent.length(); + } + + /** + * See {@link MappedByteBufferInputStream#remaining()}. + */ + public final synchronized long remaining() throws IOException { + return parent.remaining(); + } + + /** + * See {@link MappedByteBufferInputStream#position()}. + */ + public final synchronized long position() throws IOException { + return parent.position(); + } + + /** + * See {@link MappedByteBufferInputStream#position(long)}. + */ + public final synchronized MappedByteBufferInputStream position( final long newPosition ) throws IOException { + return parent.position(newPosition); + } + + /** + * See {@link MappedByteBufferInputStream#skip(long)}. + */ + public final synchronized long skip( final long n ) throws IOException { + return parent.skip(n); + } + + @Override + public final synchronized void flush() throws IOException { + parent.flush(); + } + + @Override + public final synchronized void close() throws IOException { + parent.close(); + } + + @Override + public final synchronized void write(final int b) throws IOException { + parent.checkOpen(); + final long totalRem = parent.remaining(); + if ( totalRem < 1 ) { // grow if required + parent.setLength( parent.length() + 1 ); + } + if ( ! parent.slice( parent.currSlice ).hasRemaining() ) { + if ( !parent.nextSlice() ) { + if( MappedByteBufferInputStream.DEBUG ) { + System.err.println("EOT write: "+parent.slices[ parent.currSlice ]); + parent.dbgDump("EOT write:", System.err); + } + throw new IOException("EOT"); + } + } + parent.slices[ parent.currSlice ].put( (byte)(b & 0xFF) ); + } + + @Override + public final synchronized void write(final byte b[], final int off, final int len) throws IOException { + parent.checkOpen(); + if (b == null) { + throw new NullPointerException(); + } else if( off < 0 || + off > b.length || + len < 0 || + off + len > b.length || + off + len < 0 + ) { + throw new IndexOutOfBoundsException("offset "+off+", length "+len+", b.length "+b.length); + } else if( 0 == len ) { + return; + } + final long totalRem = parent.remaining(); + if ( totalRem < len ) { // grow if required + parent.setLength( parent.length() + len - totalRem ); + } + int written = 0; + while( written < len ) { + int currRem = parent.slice( parent.currSlice ).remaining(); + if ( 0 == currRem ) { + if ( !parent.nextSlice() ) { + if( MappedByteBufferInputStream.DEBUG ) { + System.err.println("EOT write: offset "+off+", length "+len+", b.length "+b.length); + System.err.println("EOT write: written "+written+" / "+len+", currRem "+currRem); + System.err.println("EOT write: "+parent.slices[ parent.currSlice ]); + parent.dbgDump("EOT write:", System.err); + } + throw new InternalError("EOT"); + } + currRem = parent.slice( parent.currSlice ).remaining(); + } + parent.slices[ parent.currSlice ].put( b, off + written, Math.min( len - written, currRem ) ); + written += Math.min( len - written, currRem ); + } + } +} |