functions.java

基于netbeans的java桌面应用程序合集

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2003 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
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 * This software consists of voluntary contributions made by many
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 */ 

package org.apache.taglibs.standard.examples.taglib;

import java.lang.reflect.Array;
import java.util.*;
import javax.servlet.jsp.*;

/**
 * <p>Exmaples taglib Functions</p>
 * 
 * @author Pierre Delisle
 */

public class Functions {

    /**
     * Display the collection types supported by c:forEach.
     */
    public static String display(Object obj) throws JspTagException {
        if (obj == null) return "";         
        if (obj instanceof String) return obj.toString();
        /*
        if (obj instanceof Collection) {
            return "FIXME";
        }
        if (obj instanceof Map) {
            return "FIXME";
        }        
        if (obj instanceof Iterator) {
            Iterator iter = (Iterator)obj;
            while (iter.hasNext()) {
                iter.next();
            }
            return "FIXME";
        }            
        if (obj instanceof Enumeration) {
            Enumeration enum = (Enumeration)obj;
            while (enum.hasMoreElements()) {
                enum.nextElement();
            }
            return "FIXME";
        }
        */
        try {
            StringBuffer buf = new StringBuffer();
            int count = Array.getLength(obj);
            for (int i=0; i<count; i++) {
                buf.append(Array.get(obj, i).toString());
                if (i<count-1) buf.append("<font color='red'> &#149; </font>");
            }
            return buf.toString();
        } catch (IllegalArgumentException ex) {}
        throw new JspTagException("Bad Item");        
    }      
}