org.scijava.io.FileHandle Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of scijava-common Show documentation
SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by both ImageJ and SCIFIO.
There is a newer version: 2.99.0
Show newest version
/*
 * #%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 {

	// -- 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 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());
	}

}