catlett 01/05/21 13:56:02 Added: random/src/org/apache/taglibs/random RandomNumTag.java Log: first import of random taglib Revision Changes Path 1.1 jakarta-taglibs/random/src/org/apache/taglibs/random/RandomNumTag.java Index: RandomNumTag.java =================================================================== /* * $Header: /home/cvs/jakarta-taglibs/random/src/org/apache/taglibs/random/RandomNumTag.java,v 1.1 2001/05/21 20:56:01 catlett Exp $ * $Revision: 1.1 $ * $Date: 2001/05/21 20:56:01 $ * * ==================================================================== * * The Apache Software License, Version 1.1 * * Copyright (c) 1999 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. * * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * */ package org.apache.taglibs.random; import java.util.*; import javax.servlet.jsp.*; import javax.servlet.jsp.tagext.*; import org.apache.taglibs.random.RandomNum; /** * The RandomNumTag will set up a random number generator which can be accessed by * the <b>jsp:getProperty</b> tag. * * <tag> * <name>randomnum</name> * <tagclass>org.apache.taglibs.random.RandomNumTag</tagclass> * <bodycontent>empty</bodycontent> * <info>Creates a variable length random number generator</info> * * <attribute> * <name>id</name> * <required>true</required> * <rtexprvalue>false</rtexprvalue> * </attribute> * <attribute> * <name>range</name> * <required>false</required> * <rtexprvalue>false</rtexprvalue> * </attribute> * </tag> * * @author Rich Catlett * * @version 1.0 * */ public class RandomNumTag extends TagSupport { /** * upper bound in which to search for a number defaults to 9 */ private long upper = 100; /** * lower bound in which to search for a number defaults to 0 */ private long lower = 0; /** * implementation of method from the Tag interface that tells the JSP what * to do upon encountering the start tag for this tag set * * @return SKIP_BODY - integer value telling the JSP engine to not evaluate * the body of this tag * * @throw JspException thrown when error occurs in processing the body of * this method * */ public final int doStartTag() throws JspException { RandomNum random = new RandomNum(); // set the range in the randomnum class random.setRange(lower, upper); // place random into page scope so that it will be available as a // script variable pageContext.setAttribute(id, random, PageContext.PAGE_SCOPE); return SKIP_BODY; } /** * set the Range * * @param value String value that determines range from which the random * number will be chosen * * @throws JspException if the lowerbound is greater than the upperbound * */ public final void setRange(String value) throws JspException { try { upper = new Integer(value.substring(value.indexOf('-') + 1)).longValue(); } catch (NumberFormatException nfe) { pageContext.getServletContext().log("upper attribute could not be" + " turned into an Integer default value was used"); } try { lower = new Integer(value.substring(0, value.indexOf('-'))).longValue(); } catch (NumberFormatException nfe) { pageContext.getServletContext().log("lower attribute could not be" + " turned into an Integer default value was used"); } // check that the range is possible i.e. the upperbound is not lower than // the lowerbound if (upper < lower) throw new JspException("You can't have a range where the lowerbound" + " is higher than the upperbound."); } }
