Hibernate example source code file (Ejb3DiscriminatorColumn.java)

This example Hibernate source code file (Ejb3DiscriminatorColumn.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_discriminator_column_name, default_discriminator_length, default_discriminator_length, default_discriminator_type, discriminatortype, dtype, ejb3discriminatorcolumn, ejb3discriminatorcolumn, mappings, override, string, string, stringbuilder, stringbuilder

The Hibernate Ejb3DiscriminatorColumn.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, 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.cfg;
import javax.persistence.DiscriminatorColumn;
import javax.persistence.DiscriminatorType;
import org.hibernate.AssertionFailure;
import org.hibernate.annotations.DiscriminatorFormula;

/**
 * Discriminator column
 *
 * @author Emmanuel Bernard
 */
public class Ejb3DiscriminatorColumn extends Ejb3Column {
	private static final String DEFAULT_DISCRIMINATOR_COLUMN_NAME = "DTYPE";
	private static final String DEFAULT_DISCRIMINATOR_TYPE = "string";
	private static final int DEFAULT_DISCRIMINATOR_LENGTH = 31;

	private String discriminatorTypeName;

	public Ejb3DiscriminatorColumn() {
		//discriminator default value
		super();
		setLogicalColumnName( DEFAULT_DISCRIMINATOR_COLUMN_NAME );
		setNullable( false );
		setDiscriminatorTypeName( DEFAULT_DISCRIMINATOR_TYPE );
		setLength( DEFAULT_DISCRIMINATOR_LENGTH );
	}

	public String getDiscriminatorTypeName() {
		return discriminatorTypeName;
	}

	public void setDiscriminatorTypeName(String discriminatorTypeName) {
		this.discriminatorTypeName = discriminatorTypeName;
	}

	public static Ejb3DiscriminatorColumn buildDiscriminatorColumn(
			DiscriminatorType type, DiscriminatorColumn discAnn,
			DiscriminatorFormula discFormulaAnn,
			Mappings mappings) {
		Ejb3DiscriminatorColumn discriminatorColumn = new Ejb3DiscriminatorColumn();
		discriminatorColumn.setMappings( mappings );
		discriminatorColumn.setImplicit( true );
		if ( discFormulaAnn != null ) {
			discriminatorColumn.setImplicit( false );
			discriminatorColumn.setFormula( discFormulaAnn.value() );
		}
		else if ( discAnn != null ) {
			discriminatorColumn.setImplicit( false );
			if ( !BinderHelper.isEmptyAnnotationValue( discAnn.columnDefinition() ) ) {
				discriminatorColumn.setSqlType(
						discAnn.columnDefinition()
				);
			}
			if ( !BinderHelper.isEmptyAnnotationValue( discAnn.name() ) ) {
				discriminatorColumn.setLogicalColumnName( discAnn.name() );
			}
			discriminatorColumn.setNullable( false );
		}
		if ( DiscriminatorType.CHAR.equals( type ) ) {
			discriminatorColumn.setDiscriminatorTypeName( "character" );
			discriminatorColumn.setImplicit( false );
		}
		else if ( DiscriminatorType.INTEGER.equals( type ) ) {
			discriminatorColumn.setDiscriminatorTypeName( "integer" );
			discriminatorColumn.setImplicit( false );
		}
		else if ( DiscriminatorType.STRING.equals( type ) || type == null ) {
			if ( discAnn != null ) discriminatorColumn.setLength( discAnn.length() );
			discriminatorColumn.setDiscriminatorTypeName( "string" );
		}
		else {
			throw new AssertionFailure( "Unknown discriminator type: " + type );
		}
		discriminatorColumn.bind();
		return discriminatorColumn;
	}

	@Override
	public String toString() {
		final StringBuilder sb = new StringBuilder();
		sb.append( "Ejb3DiscriminatorColumn" );
		sb.append( "{logicalColumnName'" ).append( getLogicalColumnName() ).append( '\'' );
		sb.append( ", discriminatorTypeName='" ).append( discriminatorTypeName ).append( '\'' );
		sb.append( '}' );
		return sb.toString();
	}
}