Hibernate example source code file (Size.java)

This example Hibernate source code file (Size.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

default_length, default_precision, default_precision, default_scale, default_scale, g, io, k, lobmultiplier, lobmultiplier, m, none, serializable, size, size

The Hibernate Size.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.metamodel.relational;

import java.io.Serializable;

/**
 * Models size restrictions/requirements on a column's datatype.
 * <p/>
 * IMPL NOTE: since we do not necessarily know the datatype up front, and therefore do not necessarily know
 * whether length or precision/scale sizing is needed, we simply account for both here.  Additionally LOB
 * definitions, by standard, are allowed a "multiplier" consisting of 'K' (Kb), 'M' (Mb) or 'G' (Gb).
 *
 * @author Steve Ebersole
 */
public class Size implements Serializable {
	public static enum LobMultiplier {
		NONE( 1 ),
		K( NONE.factor * 1024 ),
		M( K.factor * 1024 ),
		G( M.factor * 1024 );

		private long factor;

		private LobMultiplier(long factor) {
			this.factor = factor;
		}

		public long getFactor() {
			return factor;
		}
	}

	public static final int DEFAULT_LENGTH = 255;
	public static final int DEFAULT_PRECISION = 19;
	public static final int DEFAULT_SCALE = 2;

	private long length = DEFAULT_LENGTH;
	private int precision = DEFAULT_PRECISION;
	private int scale = DEFAULT_SCALE;
	private LobMultiplier lobMultiplier = LobMultiplier.NONE;

	public Size() {
	}

	/**
	 * Complete constructor.
	 *
	 * @param precision numeric precision
	 * @param scale numeric scale
	 * @param length type length
	 * @param lobMultiplier LOB length multiplier
	 */
	public Size(int precision, int scale, long length, LobMultiplier lobMultiplier) {
		this.precision = precision;
		this.scale = scale;
		this.length = length;
		this.lobMultiplier = lobMultiplier;
	}

	public static Size precision(int precision) {
		return new Size( precision, -1, -1, null );
	}

	public static Size precision(int precision, int scale) {
		return new Size( precision, scale, -1, null );
	}

	public static Size length(long length) {
		return new Size( -1, -1, length, null );
	}

	public static Size length(long length, LobMultiplier lobMultiplier) {
		return new Size( -1, -1, length, lobMultiplier );
	}

	public int getPrecision() {
		return precision;
	}

	public int getScale() {
		return scale;
	}

	public long getLength() {
		return length;
	}

	public LobMultiplier getLobMultiplier() {
		return lobMultiplier;
	}

	public void initialize(Size size) {
		this.precision = size.precision;
		this.scale =  size.scale;
		this.length = size.length;
	}

	public void setPrecision(int precision) {
		this.precision = precision;
	}

	public void setScale(int scale) {
		this.scale = scale;
	}

	public void setLength(long length) {
		this.length = length;
	}

	public void setLobMultiplier(LobMultiplier lobMultiplier) {
		this.lobMultiplier = lobMultiplier;
	}
}