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FileHandle.java
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/*
* #%L
* SciJava Common shared library for SciJava software.
* %%
* Copyright (C) 2009 - 2016 Board of Regents of the University of
* Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
* Institute of Molecular Cell Biology and Genetics.
* %%
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDERS 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.
* #L%
*/
package org.scijava.io;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.scijava.plugin.Plugin;
/**
* {@link DataHandle} for a {@link FileLocation}.
*
* @author Curtis Rueden
*/
@Plugin(type = DataHandle.class)
public class FileHandle extends AbstractDataHandle<FileLocation> {
// -- Fields --
/** The {@link RandomAccessFile} backing this file handle. */
private RandomAccessFile raf;
/** The mode of the {@link RandomAccessFile}. */
private String mode = "rw";
// -- FileHandle methods --
/** Gets the random access file object backing this FileHandle. */
public RandomAccessFile getRandomAccessFile() throws IOException {
return raf();
}
public String getMode() {
return mode;
}
public void setMode(final String mode) {
if (raf != null) {
throw new IllegalStateException("File already initialized");
}
this.mode = mode;
}
// -- DataHandle methods --
@Override
public long offset() throws IOException {
return raf().getFilePointer();
}
@Override
public long length() throws IOException {
return raf().length();
}
@Override
public int read() throws IOException {
return raf().read();
}
@Override
public int read(final byte[] b) throws IOException {
return raf().read(b);
}
@Override
public int read(final byte[] b, final int off, final int len)
throws IOException
{
return raf().read(b, off, len);
}
@Override
public void seek(final long pos) throws IOException {
raf().seek(pos);
}
// -- DataInput methods --
@Override
public boolean readBoolean() throws IOException {
return raf().readBoolean();
}
@Override
public byte readByte() throws IOException {
return raf().readByte();
}
@Override
public char readChar() throws IOException {
return raf().readChar();
}
@Override
public double readDouble() throws IOException {
return raf().readDouble();
}
@Override
public float readFloat() throws IOException {
return raf().readFloat();
}
@Override
public void readFully(final byte[] b) throws IOException {
raf().readFully(b);
}
@Override
public void readFully(final byte[] b, final int off, final int len)
throws IOException
{
raf().readFully(b, off, len);
}
@Override
public int readInt() throws IOException {
return raf().readInt();
}
@Override
public String readLine() throws IOException {
return raf().readLine();
}
@Override
public long readLong() throws IOException {
return raf().readLong();
}
@Override
public short readShort() throws IOException {
return raf().readShort();
}
@Override
public int readUnsignedByte() throws IOException {
return raf().readUnsignedByte();
}
@Override
public int readUnsignedShort() throws IOException {
return raf().readUnsignedShort();
}
@Override
public String readUTF() throws IOException {
return raf().readUTF();
}
@Override
public int skipBytes(final int n) throws IOException {
return raf().skipBytes(n);
}
// -- DataOutput methods --
@Override
public void write(final byte[] b) throws IOException {
raf().write(b);
}
@Override
public void write(final byte[] b, final int off, final int len)
throws IOException
{
raf().write(b, off, len);
}
@Override
public void write(final int b) throws IOException {
raf().write(b);
}
@Override
public void writeBoolean(final boolean v) throws IOException {
raf().writeBoolean(v);
}
@Override
public void writeByte(final int v) throws IOException {
raf().writeByte(v);
}
@Override
public void writeBytes(final String s) throws IOException {
raf().writeBytes(s);
}
@Override
public void writeChar(final int v) throws IOException {
raf().writeChar(v);
}
@Override
public void writeChars(final String s) throws IOException {
raf().writeChars(s);
}
@Override
public void writeDouble(final double v) throws IOException {
raf().writeDouble(v);
}
@Override
public void writeFloat(final float v) throws IOException {
raf().writeFloat(v);
}
@Override
public void writeInt(final int v) throws IOException {
raf().writeInt(v);
}
@Override
public void writeLong(final long v) throws IOException {
raf().writeLong(v);
}
@Override
public void writeShort(final int v) throws IOException {
raf().writeShort(v);
}
@Override
public void writeUTF(final String str) throws IOException {
raf().writeUTF(str);
}
// -- Closeable methods --
@Override
public void close() throws IOException {
raf().close();
}
// -- Typed methods --
@Override
public Class<FileLocation> getType() {
return FileLocation.class;
}
// -- Helper methods --
private RandomAccessFile raf() throws IOException {
if (raf == null) initRAF();
return raf;
}
private synchronized void initRAF() throws IOException {
raf = new RandomAccessFile(get().getFile(), getMode());
}
}