/* Copyright (c) 2001-2008, The HSQL Development Group
* All rights reserved.
*
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* modification, are permitted provided that the following conditions are met:
*
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* 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
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*
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* 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"
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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();
}
}
}
}