/*
* Copyright 2001-2008 Geert Bevin <gbevin[remove] at uwyn dot com>
* Licensed under the Apache License, Version 2.0 (the "License")
* $Id: DropSequence.java 3918 2008-04-14 17:35:35Z gbevin $
*/
package com.uwyn.rife.database.queries;
import com.uwyn.rife.database.Datasource;
import com.uwyn.rife.database.capabilities.Capabilities;
import com.uwyn.rife.database.exceptions.DbQueryException;
import com.uwyn.rife.database.exceptions.SequenceNameRequiredException;
import com.uwyn.rife.database.exceptions.UnsupportedSqlFeatureException;
import com.uwyn.rife.template.Template;
import com.uwyn.rife.template.TemplateFactory;
import com.uwyn.rife.tools.StringUtils;
/**
* Object representation of a SQL "DROP SEQUENCE" query.
*
* <p>This object may be used to dynamically construct a SQL statement in a
* database-independent fashion. After it is finished, it may be executed using
* {@link com.uwyn.rife.database.DbQueryManager#executeUpdate(Query)
* DbQueryManager.executeUpdate()}.
*
* @author Geert Bevin (gbevin[remove] at uwyn dot com)
* @author Steven Grimm (koreth[remove] at midwinter dot com)
* @version $Revision: 3918 $
* @since 1.0
*/
public class DropSequence extends AbstractQuery implements Cloneable
{
private String mName = null;
public DropSequence(Datasource datasource)
{
super(datasource);
if (null == datasource) throw new IllegalArgumentException("datasource can't be null.");
clear();
}
public void clear()
{
super.clear();
mName = null;
}
public String getName()
{
return mName;
}
public Capabilities getCapabilities()
{
return null;
}
public String getSql()
throws DbQueryException
{
if (null == mSql)
{
if (null == mName)
{
throw new SequenceNameRequiredException("DropSequence");
}
else
{
Template template = TemplateFactory.SQL.get("sql."+StringUtils.encodeClassname(mDatasource.getAliasedDriver())+".drop_sequence");
if (template.hasValueId("NAME"))
{
template.setValue("NAME", mName);
}
mSql = template.getBlock("QUERY");
if (0 == mSql.length())
{
throw new UnsupportedSqlFeatureException("DROP SEQUENCE", mDatasource.getAliasedDriver());
}
assert mSql != null;
assert mSql.length() > 0;
}
}
return mSql;
}
public DropSequence name(String name)
{
if (null == name) throw new IllegalArgumentException("name can't be null.");
if (0 == name.length()) throw new IllegalArgumentException("name can't be empty.");
clearGenerated();
mName = name;
return this;
}
public DropSequence clone()
{
return (DropSequence)super.clone();
}
}