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Java > Open Source Codes > com > jcorporate > expresso > services > controller > ui > CacheAutoElement


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64 package com.jcorporate.expresso.services.controller.ui;
65
66 import com.jcorporate.expresso.core.controller.ControllerException;
67 import com.jcorporate.expresso.core.controller.ControllerResponse;
68 import com.jcorporate.expresso.core.controller.Input;
69
70
71 /**
72  * implementation of the AutoController Element which also uses Form Cache to
73  * set object values during creation phase. This is appropriate for times
74  * when, after an error, user's typing should be preserved
75  *
76  * @author Larry Hamel
77  * @since Expresso 5.3
78  */
79 public class CacheAutoElement extends DefaultAutoElement {
80
81     /**
82      * Used to set values in created db objects to the values found (if any)
83      * in the form cache. (the form cache is what people type into an HTML form,
84      * and if there is an error, we cache those values in order to send back the
85      * form (with error message) and have their typing preserved for the next try.)
86      * <p/>
87      * we override this method to have dbobjects
88      * get the value form cache.
89      *
90      * @param i the Input to retrieve from.
91      * @param oneFieldName the dataobject field name
92      * @param response the ControllerResponse.
93      */
94     protected void retrieveCachedValueInForm(ControllerResponse response, String JavaDoc oneFieldName, Input i) throws ControllerException {
95         // reset with formcache if available
96 if (response.getFormCache(oneFieldName).length() > 0) {
97             i.setDefaultValue(response.getFormCache(oneFieldName));
98         }
99     }
100 }
101
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