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16 package org.apache.myfaces.wap.renderkit.wml;
17
18 import java.util.List  ;
19 import java.util.Map ;
20 import java.util.StringTokenizer ;
21
22 import javax.faces.component.UIComponent;
23 import javax.faces.component.UISelectItem;
24 import javax.faces.component.UISelectItems;
25 import javax.faces.component.UISelectMany;
26 import javax.faces.context.FacesContext;
27 import javax.faces.context.ResponseWriter;
28 import javax.faces.model.SelectItem;
29
30 import org.apache.commons.logging.Log;
31 import org.apache.commons.logging.LogFactory;
32 import org.apache.myfaces.wap.component.SelectMany;
33 import org.apache.myfaces.wap.renderkit.Attributes;
34 import org.apache.myfaces.wap.renderkit.RendererUtils;
35 import org.apache.myfaces.wap.renderkit.WmlRenderUtils;
36 import org.apache.myfaces.wap.renderkit.WmlRenderer;
37
38
46 public class SelectManyRenderer extends WmlRenderer {
47 private static Log log = LogFactory.getLog(SelectManyRenderer.class);
48
49
50 public SelectManyRenderer() {
51 super();
52 log.debug("created object " + this.getClass().getName());
53 }
54
55 public void encodeBegin(FacesContext context, UIComponent component) throws java.io.IOException {
56 log.debug("encodeBegin(" + component.getId() + ")");
57 if (context == null || component == null) {
58 throw new NullPointerException ();
59 }
60 }
61
62 public void encodeChildren(FacesContext context, UIComponent component) throws java.io.IOException {
63 log.debug("encodeChildren(" + component.getId() + ")");
64 if (context == null || component == null) {
65 throw new NullPointerException ();
66 }
67 }
68
69 public void encodeEnd(FacesContext context, UIComponent component) throws java.io.IOException {
70 log.debug("encodeEnd(" + component.getId() + ")");
71 if (context == null || component == null) {
72 throw new NullPointerException ();
73 }
74
75 if (!component.isRendered()) return;
76
77 SelectMany comp = (SelectMany)component;
78
79 ResponseWriter writer = context.getResponseWriter();
80
81 writer.startElement(Attributes.SELECT, component);
82 RendererUtils.writeAttribute(Attributes.ID, comp.getClientId(context), writer);
83 RendererUtils.writeAttribute(Attributes.STYLE_CLASS, comp.getStyleClass(), writer);
84 RendererUtils.writeAttribute(Attributes.XML_LANG, comp.getXmllang(), writer);
85
86
87
88 if (comp.getName() == null) {
89 log.debug("getName is null");
90 comp.setName(comp.getClientId(context));
91 }
92 RendererUtils.writeAttribute(Attributes.NAME, comp.getName(), writer);
93
94 RendererUtils.writeAttribute(Attributes.TABINDEX, comp.getTabindex(), writer);
95 RendererUtils.writeAttribute(Attributes.TITLE, comp.getTitle(), writer);
96
97 RendererUtils.writeAttribute(Attributes.VALUE, convertSelectedValuesToString(comp.getSelectedValues()), writer);
99
100 RendererUtils.writeAttribute(Attributes.MULTIPLE, "true", writer);
102
103 List child = component.getChildren();
104 for (int i = 0; i < child.size(); i++){
105 if (child.get(i) instanceof UISelectItem){
106 UISelectItem item = (UISelectItem)child.get(i);
107 WmlRenderUtils.writeOption((SelectItem)item.getValue(), comp, writer);
108 }
109 if (child.get(i) instanceof UISelectItems){
110 UISelectItems item = (UISelectItems)child.get(i);
111 WmlRenderUtils.writeOptions(item.getValue(), comp, writer);
112 }
113 }
114
115 writer.endElement(Attributes.SELECT);
116 }
117
118 public void decode(FacesContext context, UIComponent component) {
119 log.debug("decode(" + component.getId() + ")");
120 if (component == null || context == null) throw new NullPointerException ();
121 if (!(component instanceof SelectMany))
122 log.error("Component " + component.getClass().getName() + " is no SelectMany component, cannot be converted!");
123
124 SelectMany comp = (SelectMany)component;
125
126 Map map = context.getExternalContext().getRequestParameterMap();
127
128 if (map.containsKey(comp.getName())){
130 log.debug("Parameter:" + comp.getName() + " was found in the request. Value: " + (String )map.get(comp.getName()));
131
132 String value = (String )map.get(comp.getName());
133 comp.setSelectedValues(convertSubmittedValueToObject(value));
134 }
135 }
136
137
138 public Object getConvertedValue(FacesContext context, UIComponent component, Object submittedValue) throws javax.faces.convert.ConverterException {
139 if (!(component instanceof UISelectMany))
140 throw new IllegalArgumentException ("Expected component of type UISelectMany. Cannot convert selected value.");
141
142 UISelectMany comp = (UISelectMany)component;
143
144 return(RendererUtils.convertUISelectManyToObject(context, comp, submittedValue));
145 }
146
147
151 private String convertSelectedValuesToString(Object obj){
152 if (obj == null) return(null);
153
154 if (!(obj instanceof String []))
155 throw new ClassCastException ("Value of SelectMany component must be a String[] type.");
156
157 StringBuffer buff = new StringBuffer ();
158
159 String [] selected = (String [])obj;
160
161 for (int i = 0 ; i < selected.length; i++){
162 String item = selected[i];
163
164 buff.append(item);
165
166 if (i < selected.length - 1) buff.append(Attributes.SELECT_MANY_SEPARATOR);
168 }
169 return (buff.toString());
170 }
171
172
173 private String [] convertSubmittedValueToObject(String value){
174 StringTokenizer st = new StringTokenizer (value, Attributes.SELECT_MANY_SEPARATOR);
175
176 String [] ret = new String [st.countTokens()];
177
178 log.debug("Selected option:");
179 for (int i = 0; st.hasMoreTokens(); i++){
180 ret[i] = st.nextToken();
181 log.debug(ret[i]);
182 }
183 return (ret);
184 }
185 }
186
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