AllTableColumns.java

/*
Copyright (c) 2008 Health Market Science, Inc.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License.

This library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
USA

You can contact Health Market Science at info@healthmarketscience.com
or at the following address:

Health Market Science
2700 Horizon Drive
Suite 200
King of Prussia, PA 19406
*/

package com.healthmarketscience.sqlbuilder;

import java.io.IOException;
import com.healthmarketscience.common.util.AppendableExt;
import com.healthmarketscience.sqlbuilder.dbspec.Table;



/**
 * Outputs a clause for SELECTing all columns from a table
 * <code>"<alias>.*"</code>
 *
 * @author James Ahlborn
 */
class AllTableColumns extends TableObject
{
  AllTableColumns(Table table) {
    super(table);
  }

  @Override
  protected void collectSchemaObjects(ValidationContext vContext)
  {
    super.collectSchemaObjects(vContext);

    // using this construct means we are essentially referencing *all* columns
    // in this table, so update the columns list accordingly
    vContext.getColumns().addAll(_table.getColumns());
  }
  
  @Override
  public void appendTo(AppendableExt app) throws IOException {
    ColumnObject.appendTableAliasPrefix(app, _table);
    app.append("*");
  }
}