Hibernate example source code file (Index.java)

This example Hibernate source code file (Index.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

arraylist, column, dialect, index, io, iterator, iterator, mapping, relationalmodel, string, string, stringbuffer, stringbuffer, table, table, util

The Hibernate Index.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.mapping;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.spi.Mapping;
import org.hibernate.internal.util.StringHelper;

/**
 * A relational table index
 *
 * @author Gavin King
 */
public class Index implements RelationalModel, Serializable {

	private Table table;
	private List columns = new ArrayList();
	private String name;

	public String sqlCreateString(Dialect dialect, Mapping mapping, String defaultCatalog, String defaultSchema)
			throws HibernateException {
		return buildSqlCreateIndexString(
				dialect,
				getName(),
				getTable(),
				getColumnIterator(),
				false,
				defaultCatalog,
				defaultSchema
		);
	}

	public static String buildSqlDropIndexString(
			Dialect dialect,
			Table table,
			String name,
			String defaultCatalog,
			String defaultSchema
	) {
		return "drop index " +
				StringHelper.qualify(
						table.getQualifiedName( dialect, defaultCatalog, defaultSchema ),
						name
				);
	}

	public static String buildSqlCreateIndexString(
			Dialect dialect,
			String name,
			Table table,
			Iterator columns,
			boolean unique,
			String defaultCatalog,
			String defaultSchema
	) {
		//TODO handle supportsNotNullUnique=false, but such a case does not exist in the wild so far
		StringBuffer buf = new StringBuffer( "create" )
				.append( unique ?
						" unique" :
						"" )
				.append( " index " )
				.append( dialect.qualifyIndexName() ?
						name :
						StringHelper.unqualify( name ) )
				.append( " on " )
				.append( table.getQualifiedName( dialect, defaultCatalog, defaultSchema ) )
				.append( " (" );
		Iterator iter = columns;
		while ( iter.hasNext() ) {
			buf.append( ( (Column) iter.next() ).getQuotedName( dialect ) );
			if ( iter.hasNext() ) buf.append( ", " );
		}
		buf.append( ")" );
		return buf.toString();
	}


	// Used only in Table for sqlCreateString (but commented out at the moment)
	public String sqlConstraintString(Dialect dialect) {
		StringBuffer buf = new StringBuffer( " index (" );
		Iterator iter = getColumnIterator();
		while ( iter.hasNext() ) {
			buf.append( ( (Column) iter.next() ).getQuotedName( dialect ) );
			if ( iter.hasNext() ) buf.append( ", " );
		}
		return buf.append( ')' ).toString();
	}

	public String sqlDropString(Dialect dialect, String defaultCatalog, String defaultSchema) {
		return "drop index " +
				StringHelper.qualify(
						table.getQualifiedName( dialect, defaultCatalog, defaultSchema ),
						name
				);
	}

	public Table getTable() {
		return table;
	}

	public void setTable(Table table) {
		this.table = table;
	}

	public int getColumnSpan() {
		return columns.size();
	}

	public Iterator getColumnIterator() {
		return columns.iterator();
	}

	public void addColumn(Column column) {
		if ( !columns.contains( column ) ) columns.add( column );
	}

	public void addColumns(Iterator extraColumns) {
		while ( extraColumns.hasNext() ) addColumn( (Column) extraColumns.next() );
	}

	/**
	 * @param column
	 * @return true if this constraint already contains a column with same name.
	 */
	public boolean containsColumn(Column column) {
		return columns.contains( column );
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String toString() {
		return getClass().getName() + "(" + getName() + ")";
	}
}