stringarraydataconverter.java

来自「Novocode的 SWT 控件框架 丰富了MDI功能」· Java 代码 · 共 65 行

/*******************************************************************************
 * Copyright (c) 2004 Stefan Zeiger and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.novocode.com/legal/epl-v10.html
 * 
 * Contributors:
 *     Stefan Zeiger ([e-mail]) - initial API and implementation
 *******************************************************************************/

package com.novocode.naf.data;



/**
 * A DataConverter for a string array with varying delimiters and parameters.
 *
 * @author Stefan Zeiger ([e-mail])
 * @since Oct 7, 2004
 * @version $Id: StringArrayDataConverter.java,v 1.5 2005/06/04 19:21:20 szeiger Exp $
 */

public class StringArrayDataConverter implements IDataConverter
{
  private static final StringArrayDataConverter instance = new StringArrayDataConverter(";", false, true);


  private final String separators;
  private final boolean trim;
  private final boolean excludeEmptyEntries;
  
  
  public static StringArrayDataConverter getDefaultInstance() { return instance; }

  
  public StringArrayDataConverter(String separators, boolean trim, boolean excludeEmptyEntries)
  {
    this.separators = separators;
    this.trim = trim;
    this.excludeEmptyEntries = excludeEmptyEntries;
  }


  public String toExternal(Class<?> type, Object value) throws Exception
  {
    if(value == null) return null;
    String[] sa = (String[])value;
    StringBuilder buf = new StringBuilder();
    for(int i=0; i<sa.length; i++)
    {
      if(i != 0) buf.append(separators.charAt(0));
      if(trim) buf.append(' ');
      buf.append(sa[i]);
    }
    return buf.toString();
  }


  public Object toInternal(Class<?> type, String value) throws Exception
  {
    return DataDecoder.decodeStringArray(value, separators, trim, excludeEmptyEntries);
  }
}