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IterateBlock.java

/*
 Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA

 */

package com.mysql.jdbc;

import java.sql.SQLException;
import java.util.Iterator;

import com.mysql.jdbc.DatabaseMetaData.IteratorWithCleanup;

00032 public abstract class IterateBlock {
      IteratorWithCleanup iteratorWithCleanup;
      Iterator javaIterator;
      boolean stopIterating = false;
      
      IterateBlock(IteratorWithCleanup i) {
            this.iteratorWithCleanup = i;
            this.javaIterator = null;
      }
      
      IterateBlock(Iterator i) {
            this.javaIterator = i;
            this.iteratorWithCleanup = null;
      }

      public void doForAll() throws SQLException {
            if (this.iteratorWithCleanup != null) {
                  try {
                        while (this.iteratorWithCleanup.hasNext()) {
                              forEach(this.iteratorWithCleanup.next());
                              
                              if (this.stopIterating) {
                                    break;
                              }
                        }
                  } finally {
                        this.iteratorWithCleanup.close();
                  }
            } else {
                  while (this.javaIterator.hasNext()) {
                        forEach(this.javaIterator.next());
                        
                        if (this.stopIterating) {
                              break;
                        }
                  }
            }
      }

      abstract void forEach(Object each) throws SQLException;
      
      public final boolean fullIteration() {
            return !this.stopIterating;
      }
}

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