Source Code Cross Referenced for NoRecordsFound.java in  » J2EE » Dinamica » dinamica » validators » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » Dinamica » dinamica.validators 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        package dinamica.validators;
02:
03:        import java.util.HashMap;
04:        import javax.servlet.http.HttpServletRequest;
05:        import dinamica.*;
06:
07:        /**
08:         * This validator returns FALSE if no rows are returned
09:         * by a given SQL query. If at least one row is returned
10:         * then the validator returns TRUE.
11:         * <br><br>
12:         * Rrequires the following custom attributes:<br>
13:         * <ul>
14:         * <li> sql: query to find any related record. You may use field makers
15:         * that will be replaced by the corresponding request parameters passed
16:         * as a recordset to the isValid method.
17:         * </ul>
18:         *  
19:         * (c) 2004 Martin Cordova<br>
20:         * This code is released under the LGPL license<br>
21:         * Dinamica Framework - http://www.martincordova.com<br>
22:         * @author Martin Cordova (dinamica@martincordova.com)
23:         * */
24:        public class NoRecordsFound extends AbstractValidator {
25:
26:            /* (non-Javadoc)
27:             * @see dinamica.AbstractValidator#isValid(javax.servlet.http.HttpServletRequest, dinamica.Recordset, java.util.HashMap)
28:             */
29:            public boolean isValid(HttpServletRequest req,
30:                    Recordset inputParams, HashMap<String, String> attribs)
31:                    throws Throwable {
32:
33:                boolean flag = true;
34:
35:                //get db channel
36:                Db db = getDb();
37:
38:                //detect if sql parameter was passed to the validator
39:                boolean bSql = attribs.containsKey("sql");
40:
41:                if (!bSql) {
42:
43:                    throw new Throwable("[" + this .getClass().getName()
44:                            + "] Missing attribute [sql] in validator.xml");
45:
46:                } else {
47:
48:                    //read config
49:                    String query = (String) attribs.get("sql");
50:
51:                    //load template and replace parameter values
52:                    String sql = getResource(query);
53:                    sql = getSQL(sql, inputParams);
54:
55:                    //execute sql
56:                    Recordset rs = db.get(sql);
57:                    if (rs.getRecordCount() == 0)
58:                        flag = false;
59:
60:                }
61:
62:                return flag;
63:
64:            }
65:
66:        }
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