// $Id: Verifier.java,v 1.2 2008/09/26 21:17:42 haschart Exp $
/**
* Copyright (C) 2004 Bas Peters
*
* This file is part of MARC4J
*
* MARC4J 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, or (at your option) any later version.
*
* MARC4J 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 MARC4J; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.marc4j.marc.impl;
import java.util.Collection;
import java.util.Iterator;
import org.marc4j.marc.ControlField;
/**
* Handles MARC checks on tags, data elements and <code>Record</code> objects.
*
* @author Bas Peters
* @version $Revision: 1.2 $
*/
public class Verifier {
private Verifier() {
}
/**
* Returns true if the given <code>String</code> value identifies a tag for
* a control field (001 through 009).
*/
public static boolean isControlField(String tag) {
if (tag.length() == 3 && tag.charAt(0) == '0' && tag.charAt(1) == '0' && tag.charAt(2) >= '0' && tag.charAt(2) <= '9')// if (Integer.parseInt(tag) < 10)
return true;
return false;
}
/**
* Returns true if the given <code>String</code> value identifies a tag for
* a control number field (001).
*/
public static boolean isControlNumberField(String tag){
if (tag.equals("001"))
return true;
return false;
}
/**
* Returns true if the given <code>Collection</code> contains an instance of
* a <code>ControlField</code> with a control number field tag (001).
*
* @param col
* the collection of <code>ControlField</code> objects.
*/
public static boolean hasControlNumberField(Collection col) {
Iterator i = col.iterator();
while (i.hasNext()) {
ControlField field = (ControlField) i.next();
String tag = field.getTag();
if (isControlNumberField(tag))
return true;
}
return false;
}
}