papersize.java

JAVA读取excel表格里的数据,与jdbc功能相当,是一个包

/*********************************************************************
 *
 *      Copyright (C) 2002 Andrew Khan
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ***************************************************************************/

package jxl.format;

/**
 * Enumeration type which contains the available excel paper sizes and their
 * codes
 */
public final class PaperSize
{
	private static final int LAST_PAPER_SIZE = 89;
	/**
	 * The excel encoding
	 */
	private int val;

	/**
	 * The paper sizes
	 */
	private static PaperSize[] paperSizes = new PaperSize[LAST_PAPER_SIZE + 1];

	/**
	 * Constructor
	 */
	private PaperSize(int v, boolean growArray)
	{
		val = v;

		if (v >= paperSizes.length && growArray)
		{
			// Grow the array and add this to it
			PaperSize[] newarray = new PaperSize[v + 1];
			System.arraycopy(paperSizes, 0, newarray, 0, paperSizes.length);
			paperSizes = newarray;
		}
		if (v < paperSizes.length)
		{
			paperSizes[v] = this;
		}
	}

	/**
	 * Constructor
	 */
	private PaperSize(int v)
	{
		this(v, true);
	}

	/**
	 * Accessor for the internal binary value association with this paper size
	 *
	 * @return the internal value
	 */
	public int getValue()
	{
		return val;
	}

	/**
	 * Gets the paper size for a specific value
	 *
	 * @param val the value
	 * @return the paper size
	 */
	public static PaperSize getPaperSize(int val)
	{
		PaperSize p = val > paperSizes.length - 1 ? null : paperSizes[val];
		return p == null ? new PaperSize(val, false) : p;
	}

	/** US Letter 8.5 x 11" */
	public static final PaperSize UNDEFINED = new PaperSize(0);

	/** US Letter 8.5 x 11" */
	public static final PaperSize LETTER = new PaperSize(1);

	/** Letter small 8.5"