multiplechoicefield.java

一个工作流设计及定义的系统,可以直接与数据库结合进行系统工作流程的定义及应用.

/*
 * Copyright (c) 2005, John Mettraux, OpenWFE.org
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 * . Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.  
 * 
 * . 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.
 * 
 * . Neither the name of the "OpenWFE" nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR 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.
 *
 * $Id: MultipleChoiceField.java,v 1.8 2005/05/17 16:41:00 jmettraux Exp $
 */

//
// MultipleChoiceField.java
//
// [e-mail]
//
// generated with 
// jtmpl 1.0.04 31.10.2002 John Mettraux ([e-mail])
//

package openwfe.org.uman.web;

import javax.servlet.http.HttpServletRequest;
import openwfe.org.ReflectionUtils;


/**
 * no comment
 *
 * <p><font size=2>CVS Info :
 * <br>$Author: jmettraux $
 * <br>$Date: 2005/05/17 16:41:00 $
 * <br>$Id: MultipleChoiceField.java,v 1.8 2005/05/17 16:41:00 jmettraux Exp $ </font>
 *
 * @author [e-mail]
 */
public class MultipleChoiceField

    extends Field

{

    private final static org.apache.log4j.Logger log = org.apache.log4j.Logger
        .getLogger(MultipleChoiceField.class.getName());

    //
    // CONSTANTS & co

    public final static String EXCLUSIVE 
        = "exclusive";
    public final static String CHOICES 
        = "choices";

    //
    // FIELDS

    protected boolean exclusive = false;
    protected java.util.List choices = null;
    protected String value = null;

    //
    // CONSTRUCTORS

    public MultipleChoiceField 
        (final String name, final java.util.Map initParams)
    {
        super(name);

        String sExclusive = (String)initParams.get(EXCLUSIVE);
        this.exclusive = (sExclusive != null && sExclusive.equals("true"));

        Object oChoices = initParams.get(CHOICES);
        if (oChoices == null)
        {
            this.choices = null;
        }
        else if (oChoices instanceof java.util.List)
        {
            this.choices = (java.util.List)oChoices;
        }
        else if (oChoices instanceof String)
        {
            this.choices = new java.util.ArrayList(1);
            this.choices.add(oChoices);
        }
        else
        {
            this.choices = java.util.Arrays.asList((String[])oChoices);
        }

        this.value = (String)initParams.get(VALUE);
        if (this.value == null) this.value = "";
    }

    //
    // METHODS from Field

    public Object parseRequestValues (final HttpServletRequest req)
        throws WumanException
    {
        String[] requestValues =
            req.getParameterValues(Handler.HANDLER_PREFIX + this.name);

        if (requestValues == null) return "";


        StringBuffer result = new StringBuffer();

        for (int i=0; i<requestValues.length; i++)
        {
            result.append(requestValues[i]);

            if (i < requestValues.length - 1) result.append(", ");
        }

        log.debug("parseRequestValues() result is >"+result.toString()+"<");

        return result.toString();
    }

    public Object clone ()
    {
        MultipleChoiceField clone = 
            new MultipleChoiceField(this.name, new java.util.HashMap(0));
        clone.value = this.value;
        clone.exclusive = this.exclusive;
        clone.choices = this.choices;

        return clone;
    }

    public String getHtmlInputTag ()
    {
        StringBuffer sb = new StringBuffer();

        String inputType = null;

        if (this.exclusive)
            inputType = "radio";
        else
            inputType = "checkbox";

        java.util.Iterator it = this.choices.iterator();
        while (it.hasNext())
        {
            String choice = (String)it.next();

            sb.append("<input");
            sb.append(" type="); 
            sb.append(inputType);
            sb.append(" name="); 
            sb.append(Handler.HANDLER_PREFIX);
            sb.append(this.name);

            sb.append(" value=\""); 
            sb.append(choice);
            sb.append("\"");

            if (this.value.indexOf(choice) > -1) sb.append(" checked");

            sb.append(">");

            sb.append(choice);
            sb.append("</input>");

            if (it.hasNext()) sb.append("<br>\n");
        }

        return sb.toString();
    }

    public void setValue (Object source)
        throws WumanException
    {
        try
        {
            Object oValue = ReflectionUtils.getAttribute(source, this.name);

            if (oValue == null)
                this.value = "null";
            else
                this.value = (String)oValue;
        }
        catch (Exception e)
        {
            throw new WumanException
                ("Failed to set value in field", e);
        }
    }

    //
    // METHODS

}