Attachment 4465 Details for Bug 36056 – Code to trace

Code to trace

OptionList.java (text/plain), 5.94 KB, created by Rich Price

on 2003-04-04 14:25:03 EST

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Creator: Rich Price

Created: 2003-04-04 14:25:03 EST

Size: 5.94 KB

patch

obsolete

>package com.checkfree.cc.cap; 
>
>import java.lang.reflect.*;
>import java.util.*;
>import java.net.*;
>import java.text.*;
>
>/**
> * This class builds a list of &lt;option&gt; HTML elements given a data object,
> * typically a GAPI output object, and a list of accessor method names.  
> * <p>
> * <b>Usage:</b><pre>
> *   // Create the bank account list select
> *   RBBankAcctList2Input acctIn = new RBBankAcctList2Input();
> *   initApiHeader(acctIn.getHeader(),sessInfo);
> *   ArrayList accts = new ArrayList();
> *   getBankAccounts(acctIn,accts);
> *   
> *   String ol = OptionList.createListHtmlFromApi(accts.toArray(),
> *                                   new String[]{"getBankAcctNbr","getBankRtgNbr","getBankAcctTyp"},
> *                                   new String[]{"getBankAcctNbr"},
> *                                   new MessageFormat("{0}"),
> *                                   Integer.parseInt(acctIndex));
> * 
> * </pre>
> * @author Rich Price
> */
>class OptionList
>{
>    private static final String OPTION_PATTERN = "<option value=\"{0}\" {1}>{2}</option>";
>    private static final Object[] GETTER_ARGS = new Object[0];
>    private static final Class[] GETTER_ARG_TYPES = new Class[0];
>    private static final String DELIM = "&";
>    
>    /**
>     * Parses the value string and returns a HashMap of name/value pairs
>     * @return A HashMap of name/value pairs. 
>     * @see createListHtmlFromApi
>     */
>    public static HashMap getSelectedValues(String optionListValueString)
>    {
>        HashMap map = new HashMap();
>        if ( optionListValueString != null )
>        {
>            StringTokenizer lex = new StringTokenizer(optionListValueString,DELIM + "=",false);
>            while ( lex.hasMoreTokens() )
>                map.put(lex.nextToken(),URLDecoder.decode(lex.nextToken()));
>        }
>        return map;            
>    }
>    
>    /**
>     * This method creates a String of HTML &lt;option&gt; elements in the following
>     * format:<p>
>     * <pre>
>     * &lt;option value="valueName1=value1^valueName2=value2"&gt; optionValues &lt;option&gt;
>     * </pre>
>     * @param api An array of Objects, typically a GAPI output object, from which data
>     * will be retrieved by name(s).
>     * @param valueNames An array of method names declared in <code>api</code>. Only
>     * public methods taking zero arguments can be used.  Each non-null value
>     * is used to create a value string for the particular HTML option element in the form:
>     * valueName1=value1^valueName2=value2...where valueName[n] is the method name.
>     * For convenience, the getValues() method will return a HashMap of these name/value
>     * pairs.
>     * @param optionNames An array of method names declared in <code>api</code>. Only
>     * public methods taking zero arguments can be listed.  Each non-null value
>     * is used to create a parameter list to pass to a supplied MessageFormat object.
>     * Each value retrieved from the api object will be substituted using the MessageFormat
>     * object, the resulting String is used to create the optionValues string that is
>     * displayed to the user.
>     * @param selectedIndex The index of the option that should be selected. If -1, nothing
>     * will be selected.
>     * 
>     */
>    public static String createListHtmlFromApi(Object[] api, 
>                                    String[] valueNames,
>                                    String[] optionNames,
>                                    MessageFormat optionFormat,
>                                    int selectedIndex )
>    {
>        StringBuffer html = new StringBuffer();
>        for ( int apiIndex = 0; apiIndex < api.length; apiIndex++ )
>        {
>            final String[] messageArgs = new String[3];        
>            // for each valueName, use reflection to look up data from the api
>            StringBuffer buf = new StringBuffer();
>            for ( int i = 0; i < valueNames.length; i++ )
>            {
>                try
>                {
>                    Method m = api[apiIndex].getClass().getMethod(valueNames[i], GETTER_ARG_TYPES);
>                    String value = m.invoke(api[apiIndex],GETTER_ARGS).toString();
>
>                    if ( value != null && value.length() > 0 )
>                    {
>                        if ( buf.length() > 0 )
>                            buf.append(DELIM);
>                        buf.append(valueNames[i]).append("=").append(URLEncoder.encode(value));
>                    }    
>                }
>                catch (Exception e) {}
>            }
>            // set the first and second value arguments for the pattern
>            messageArgs[0] = buf.toString();
>            if ( apiIndex == selectedIndex )
>                messageArgs[1] = "selected";
>            else
>                messageArgs[1] = "";
>                        
>            // now, handle the option part
>            buf.setLength(0);
>            String[] optionFormatArgs = new String[optionNames.length];
>            for ( int i = 0; i < optionNames.length; i++ )
>            {
>                try
>                {
>                    optionFormatArgs[i] = "";    
>                    Method m = api[apiIndex].getClass().getMethod(optionNames[i],GETTER_ARG_TYPES);
>                    String value = m.invoke(api[apiIndex],GETTER_ARGS).toString();
>                    if ( value != null )
>                        optionFormatArgs[i] = value;
>                }
>                catch(Exception e) {}
>            }
>            
>            messageArgs[2] = optionFormat.format(optionFormatArgs,buf,new FieldPosition(0)).toString();
>            html.append(MessageFormat.format(OPTION_PATTERN,messageArgs));
>        }
>        return html.toString();
>    }
>    
>    public static void main(String[] args) throws Exception
>    {
>        OptionList.createListHtmlFromApi(new Object[]{new String()},new String[]{"getFoo"},new String[]{"getFoo"},new MessageFormat("{0}"),-1);
>    }
>    
>}

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Attachments on bug 36056: 4455 | 4464 | 4465 | 4553