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Extension for controlling data sources

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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @authors tag. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.arquillian.persistence.dbunit;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ColumnsHolder
{

   final List global = new ArrayList();

   final Map> columnsPerTable = new HashMap>();

   public ColumnsHolder(String[] columns)
   {
      for (String column : columns)
      {
         if (column.length() == 0)
         {
            continue;
         }
         if (!column.contains("."))
         {
            global.add(column);
         }
         else
         {
            splitTableAndColumn(column);
         }
      }
   }


   private void splitTableAndColumn(String columnToExclude)
   {
      final String[] splittedTableAndColumn = columnToExclude.split("\\.");

      if (splittedTableAndColumn.length != 2)
      {
         throw new IllegalArgumentException("Cannot associated table with column for [" + columnToExclude
               + "]. Expected format: 'tableName.columnName'");
      }

      final String tableName = splittedTableAndColumn[0];
      List tableColumns = columnsPerTable.get(tableName);

      if (tableColumns == null)
      {
         tableColumns = new ArrayList();
         columnsPerTable.put(tableName, tableColumns);
      }

      tableColumns.add(splittedTableAndColumn[1]);
   }

}