HSQLDB example source code file (DatabaseObjectNames.java)

This example HSQLDB source code file (DatabaseObjectNames.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 - HSQLDB tags/keywords

databaseobjectnames, databaseobjectnames, hashmap, hsqlexception, hsqlexception, hsqlname, hsqlname, iterator, object, object, string

The HSQLDB DatabaseObjectNames.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * 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.hsqldb;

import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.lib.HashMap;
import org.hsqldb.lib.Iterator;

/**
 * Transitional container for object names that are unique across the
 * DB instance but are owned by different DB objects. Currently names for
 * Index and Trigger objects.<p>
 *
 * @author fredt@users
 * @version 1.7.2
 * @since 1.7.2
 */
class DatabaseObjectNames {

    HashMap nameList = new HashMap();

    DatabaseObjectNames() {}

    boolean containsName(String name) {
        return nameList.containsKey(name);
    }

    HsqlName getOwner(String name) {
        return (HsqlName) nameList.get(name);
    }

    void addName(String name, HsqlName owner,
                 int errorcode) throws HsqlException {

        // should not contain name
        if (containsName(name)) {
            throw Trace.error(errorcode, name);
        }

        nameList.put(name, owner);
    }

    void rename(String name, String newname,
                int errorcode) throws HsqlException {

        HsqlName owner = (HsqlName) nameList.get(name);

        addName(newname, owner, errorcode);
        nameList.remove(name);
    }

    Object removeName(String name) throws HsqlException {

        Object owner = nameList.remove(name);

        if (owner == null) {

            // should contain name
            throw Trace.error(Trace.GENERAL_ERROR);
        }

        return owner;
    }

    void removeOwner(HsqlName owner) {

        Iterator it = nameList.values().iterator();

        while (it.hasNext()) {
            Object currentvalue = it.next();

            if (owner.equals(currentvalue)) {
                it.remove();
            }
        }
    }
}