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The NetCDF-Java Library is a Java interface to NetCDF files, as well as to many other types of scientific data formats.
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/*
 * Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
 *
 * Portions of this software were developed by the Unidata Program at the
 * University Corporation for Atmospheric Research.
 *
 * Access and use of this software shall impose the following obligations
 * and understandings on the user. The user is granted the right, without
 * any fee or cost, to use, copy, modify, alter, enhance and distribute
 * this software, and any derivative works thereof, and its supporting
 * documentation for any purpose whatsoever, provided that this entire
 * notice appears in all copies of the software, derivative works and
 * supporting documentation.  Further, UCAR requests that the user credit
 * UCAR/Unidata in any publications that result from the use of this
 * software or in any product that includes this software. The names UCAR
 * and/or Unidata, however, may not be used in any advertising or publicity
 * to endorse or promote any products or commercial entity unless specific
 * written permission is obtained from UCAR/Unidata. The user also
 * understands that UCAR/Unidata is not obligated to provide the user with
 * any support, consulting, training or assistance of any kind with regard
 * to the use, operation and performance of this software nor to provide
 * the user with any updates, revisions, new versions or "bug fixes."
 *
 * THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
 */
// $Id: RegExpAndReplaceOnPathLabeler.java 63 2006-07-12 21:50:51Z edavis $
package thredds.crawlabledataset;

/**
 * _more_
 *
 * @author edavis
 * @since Dec 28, 2005 9:31:33 PM
 */
public class RegExpAndReplaceOnPathLabeler implements CrawlableDatasetLabeler
{


  private String regExp;
  private java.util.regex.Pattern pattern;
  private String replaceString;

  public RegExpAndReplaceOnPathLabeler( String regExp, String replaceString )
  {
    this.regExp = regExp;
    this.pattern = java.util.regex.Pattern.compile( regExp );
    this.replaceString = replaceString;
  }

  public Object getConfigObject() { return null; }

  public String getRegExp() { return regExp; }
  public String getReplaceString() { return replaceString; }

  public String getLabel( CrawlableDataset dataset )
  {
    java.util.regex.Matcher matcher = this.pattern.matcher( dataset.getPath() );
    if ( ! matcher.find() ) return null;

    StringBuffer startTime = new StringBuffer();
    matcher.appendReplacement( startTime, this.replaceString );
    startTime.delete( 0, matcher.start() );

    if ( startTime.length() == 0 ) return null;

    return startTime.toString();
  }
}