org.databene.jdbacl.model.DBNonUniqueIndex Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jdbacl

jdbacl stands for 'Java DataBase ACcess Layer' and provides utilities for accessing JDBC databases from Java programs, retrieving meta information in an object model and querying database data.

There is a newer version: 0.8.19

Show newest version

/*
 * (c) Copyright 2006-2011 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.databene.jdbacl.model;

import java.util.Arrays;

import org.databene.commons.ArrayUtil;
import org.databene.commons.NullSafeComparator;

/**
 * Represents a non-unique database index.


 * Created: 11.01.2007 00:32:53
 * @author Volker Bergmann
 */
public class DBNonUniqueIndex extends DBIndex {

    private static final long serialVersionUID = -6326915676663722678L;
    
	private String[] columnNames;

    public DBNonUniqueIndex(String name, boolean nameDeterministic, DBTable table, String ... columnNames) {
        super(name, nameDeterministic, table);
        this.columnNames = columnNames;
    }

    @Override
    public boolean isUnique() {
        return false;
    }

    @Override
    public String[] getColumnNames() {
        return columnNames;
    }
    
    @Override
    public void addColumnName(String columnName) {
    	this.columnNames = ArrayUtil.append(columnName, columnNames);
    }
    
	public boolean isIdentical(DBObject other) {
		if (this == other)
			return true;
		if (other == null || !(other instanceof DBNonUniqueIndex))
			return false;
		DBNonUniqueIndex that = (DBNonUniqueIndex) other;
		return NullSafeComparator.equals(this.name, that.name)
			&& Arrays.equals(columnNames, that.getColumnNames())
			&& NullSafeComparator.equals(getOwner().getName(), that.getOwner().getName());
	}

}