labelssequence.java

常用机器学习算法,java编写源代码,内含常用分类算法,包括说明文档

/* Copyright (C) 2002 Univ. of Massachusetts Amherst, Computer Science Dept.
   This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
   http://www.cs.umass.edu/~mccallum/mallet
   This software is provided under the terms of the Common Public License,
   version 1.0, as published by http://www.opensource.org.  For further
   information, see the file `LICENSE' included with this distribution. */





package edu.umass.cs.mallet.base.types;

/**
 *  A simple {@link Sequence} implementation where all of the
 *  elements must be Labels.   Provides a convenient type-safe accessor {@link getLabels}.
 *  Instances of LabelsSequence are immutable.
 *
 *  @author Andrew McCallum <a href="mailto:[e-mail]">[e-mail]</a>
 */
public class LabelsSequence implements Sequence
{
	Labels[] seq;
	
  /**
	 *  Create a LabelsSequence from an array.  The array is shallow-copied.
	 */
	public LabelsSequence (Labels[] seq)
	{
		this.seq = new Labels[seq.length];
		System.arraycopy (seq, 0, this.seq, 0, seq.length);
	}

	public int size () { return seq.length; }

	public Object get (int i) { return seq[i]; }

	public Labels getLabels (int i) { return seq[i]; }

	public String toString ()
	{
		String ret = "LabelsSequence:\n";
		for (int i = 0; i < seq.length; i++) {
			ret += i+": ";
			ret += seq[i].toString();
			ret += "\n";
		}
		return ret;
	}
}