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1
16 package com.blandware.atleap.webapp.action.core.grid;
17
18 import com.blandware.atleap.webapp.form.core.SetFilterForm;
19 import com.blandware.atleap.webapp.taglib.core.grid.util.Grid;
20 import com.blandware.atleap.webapp.taglib.core.grid.util.SetFilter;
21 import com.blandware.atleap.webapp.util.core.WebappUtil;
22 import org.apache.commons.beanutils.PropertyUtils;
23 import org.apache.struts.action.ActionForm;
24 import org.apache.struts.action.ActionForward;
25 import org.apache.struts.action.ActionMapping;
26
27 import javax.servlet.http.HttpServletRequest  ;
28 import javax.servlet.http.HttpServletResponse ;
29 import javax.servlet.http.HttpSession ;
30 import javax.servlet.jsp.JspException ;
31 import java.lang.reflect.Method ;
32 import java.util.Arrays ;
33 import java.util.Collection ;
34 import java.util.HashMap ;
35 import java.util.Iterator ;
36 import java.util.Map ;
37
38
54 public final class CallSetFilterAction extends BaseGridAction {
55
56
65 public ActionForward execute(ActionMapping mapping, ActionForm form,
66 HttpServletRequest request, HttpServletResponse response) throws Exception {
67
68 HttpSession session = request.getSession();
69
70 SetFilterForm setFilterForm = (SetFilterForm) form;
71 String fieldName = setFilterForm.getFieldName();
72 String gridName = setFilterForm.getGridName();
73 String beanId = setFilterForm.getBeanId();
74 String methodName = setFilterForm.getMethod();
75
76 Grid grid = getGridByName(gridName, session);
77
78 if ( grid == null ) {
79 if ( log.isErrorEnabled() ) {
80 String errorMessage = "No grid with name " + gridName + " could be found in session";
81 log.error(errorMessage);
82 }
83 return mapping.findForward("filterError");
84 }
85 boolean beanIdSpecified = beanId != null && beanId.length() != 0;
86 boolean methodNameSpecified = methodName != null && methodName.length() != 0;
87
88 Object c = null;
89 Collection collection = null;
90 Map availableElements = new HashMap ();
91 boolean isMap = false;
92 if ( beanIdSpecified && methodNameSpecified ) {
93
94
96 Object bean = getBean(beanId);
97 if ( bean == null ) {
98 String errorMessage = "No bean with ID=" + beanId + " could be found in application context";
99 if ( log.isErrorEnabled() ) {
100 log.error(errorMessage);
101 }
102 JspException e = new JspException (errorMessage);
103 throw e;
104 }
105
106 Method method = null;
107 try {
108 method = bean.getClass().getMethod(methodName, (Class []) null);
109 } catch ( NoSuchMethodException e ) {
110 if ( log.isErrorEnabled() ) {
111 log.error(e.getMessage());
112 }
113 throw new JspException (e);
114 }
115
116
118 try {
119 collection = (Collection ) method.invoke(bean, (Object []) null);
120 } catch ( Exception e ) {
121 if ( log.isErrorEnabled() ) {
122 log.error("Exception: " + e.getClass().getName() + ": " + e.getMessage());
123 }
124 throw new JspException (e);
125 }
126
127 } else {
128 c = session.getAttribute(SetFilter.AVAILABLE_ELEMENTS);
129 if ( c instanceof Map ) {
130 availableElements = (Map ) c;
131 isMap = true;
132 }
133 }
134
135 if ( !isMap ) {
137 if ( collection == null ) {
139 if ( c instanceof Collection ) {
141 collection = (Collection ) c;
142 } else if ( c instanceof Object [] ) {
143 collection = Arrays.asList((Object []) c);
144 }
145 }
146
147 String labelProperty = setFilterForm.getLabel();
148 String valueProperty = setFilterForm.getValue();
149
150 for ( Iterator i = collection.iterator(); i.hasNext(); ) {
152 Object nextElement = i.next();
153 String label = new String ();
154 String value = new String ();
155 if ( valueProperty != null && valueProperty.length() > 0 ) {
156 value = String.valueOf(PropertyUtils.getProperty(nextElement, valueProperty));
158 if ( labelProperty != null && labelProperty.length() > 0 ) {
159 label = String.valueOf(PropertyUtils.getProperty(nextElement, labelProperty));
160 } else {
161 label = value;
162 }
163 } else {
164 label = String.valueOf(nextElement);
165 value = String.valueOf(nextElement);
166 }
167 availableElements.put(value, label);
168 }
169 }
170
171
172 session.setAttribute(SetFilter.AVAILABLE_ELEMENTS, availableElements);
173
174 SetFilter filter = null;
175 try {
176 filter = (SetFilter) grid.getFilterByFieldName(fieldName);
177 } catch ( ClassCastException e ) {
178 if ( log.isErrorEnabled() ) {
179 String errorMessage = "Filter for field \'" + fieldName + "\' in grid \'" + gridName + "\' is not instance of com.blandware.atleap.webapp.taglib.core.grid.util.SetFilter";
180 log.error(errorMessage);
181 }
182 return mapping.findForward("filterError");
183 }
184
185 if ( filter != null ) {
186 try {
187 String rowIterators = setFilterForm.getRowIterators();
188 WebappUtil.copyProperties(setFilterForm, filter, request);
189 setFilterForm.setRowIterators(rowIterators);
190 } catch ( Exception e ) {
191 if ( log.isErrorEnabled() ) {
192 log.error(e);
193 }
194 throw new JspException (e);
195 }
196 }
197
198 if ( log.isDebugEnabled() ) {
199 log.debug("Returning filter page: " + mapping.findForward("showFilterPage").getPath());
200 }
201
202 return mapping.findForward("showFilterPage");
203 }
204 } |
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