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16 package org.apache.myfaces.wap.renderkit.wml;
17
18 import java.util.Iterator  ;
19 import java.util.Map ;
20 import java.util.Set ;
21
22 import javax.faces.FacesException;
23 import javax.faces.component.UIComponent;
24 import javax.faces.component.UIForm;
25 import javax.faces.context.FacesContext;
26 import javax.faces.context.ResponseWriter;
27 import javax.faces.event.ActionEvent;
28
29 import org.apache.commons.logging.Log;
30 import org.apache.commons.logging.LogFactory;
31 import org.apache.myfaces.wap.component.CommandButton;
32 import org.apache.myfaces.wap.renderkit.Attributes;
33 import org.apache.myfaces.wap.renderkit.RendererUtils;
34 import org.apache.myfaces.wap.renderkit.WmlRenderer;
35
36
37
45 public class CommandButtonRenderer extends WmlRenderer {
46 private static Log log = LogFactory.getLog(CommandButtonRenderer.class);
47
48
49 public CommandButtonRenderer() {
50 super();
51 log.debug("created object " + this.getClass().getName());
52 }
53
54 public void encodeBegin(FacesContext context, UIComponent component) throws java.io.IOException {
55 log.debug("encodeBegin(" + component.getId() + ")");
56 if (context == null || component == null) {
57 throw new NullPointerException ();
58 }
59 if (!component.isRendered()) return;
60
61 }
62
63 public void encodeChildren(FacesContext context, UIComponent component) throws java.io.IOException {
64 log.debug("encodeChildren(" + component.getId() + ")");
65 if (context == null || component == null) {
66 throw new NullPointerException ();
67 }
68 }
69
70 public void encodeEnd(FacesContext context, UIComponent component) throws java.io.IOException {
71 log.debug("encodeEnd(" + component.getId() + ")");
72 if (context == null || component == null) {
73 throw new NullPointerException ();
74 }
75 if (!component.isRendered()) return;
76
77 ResponseWriter writer = context.getResponseWriter();
78 CommandButton comp = (CommandButton)component;
79
80 writer.startElement(Attributes.DO, component);
82 RendererUtils.writeAttribute(Attributes.ID, comp.getClientId(context), writer);
83 RendererUtils.writeAttribute(Attributes.LABEL, comp.getValue(), writer);
87 RendererUtils.writeAttribute(Attributes.TYPE, comp.getType(), writer);
88
89
90 if (comp.isOptional()) RendererUtils.writeAttribute(Attributes.OPTIONAL, "true", writer);
91
92 if (isReset(comp))
93 renderReset(context, comp);
94 else
95 renderAction(context, comp);
96
97 writer.endElement(Attributes.DO);
98 }
99
100
101 public void decode(FacesContext context, UIComponent component) {
102 log.debug("decode(" + component.getId() + ")");
103 if (component == null ) throw new NullPointerException ();
104 if (!component.isRendered()) return;
105
106 Map map = context.getExternalContext().getRequestParameterMap();
107
108 if (map.containsKey(component.getClientId(context) + Attributes.POSTFIX_ACTIVATED) && !isReset((CommandButton)component)){
110 log.debug("action queued");
111 component.queueEvent(new ActionEvent(component));
112 }
113 }
114
115 private void renderAction(FacesContext context, CommandButton comp) throws java.io.IOException {
116 ResponseWriter writer = context.getResponseWriter();
117
118 UIForm parentForm = getParentForm(context, comp);
120 String href = RendererUtils.getCurrentUrl(context);
121
122 writer.startElement(Attributes.GO, comp);
124 writer.writeAttribute(Attributes.HREF, href, null);
125 writer.writeAttribute(Attributes.METHOD, Attributes.POST, null);
126
127 Set inputTags = RendererUtils.getInputTags(parentForm.getChildren());
128 Iterator iter = inputTags.iterator();
129
130 log.debug("Form has " + inputTags.size() + " input tags.");
131
132 while(iter.hasNext()){
133 UIComponent component = (UIComponent)iter.next();
134 String name = RendererUtils.getAttribute(component, Attributes.NAME);
135
136 writer.startElement(Attributes.POSTFIELD, component);
138 writer.writeAttribute(Attributes.NAME, name, null);
139 writer.writeAttribute(Attributes.VALUE, "$(" + name + ")", null);
140 writer.endElement(Attributes.POSTFIELD);
141 }
142
143 writer.startElement(Attributes.POSTFIELD, comp);
145 writer.writeAttribute(Attributes.NAME, parentForm.getClientId(context) + Attributes.POSTFIX_SUBMITED, null);
146 writer.writeAttribute(Attributes.VALUE, "true", null);
147 writer.endElement(Attributes.POSTFIELD);
148
149 writer.startElement(Attributes.POSTFIELD, comp);
151 writer.writeAttribute(Attributes.NAME, comp.getClientId(context) + Attributes.POSTFIX_ACTIVATED, null);
152 writer.writeAttribute(Attributes.VALUE, "true", null);
153 writer.endElement(Attributes.POSTFIELD);
154
155 writer.endElement(Attributes.GO);
156
157 }
158
159 private void renderReset(FacesContext context, CommandButton comp) throws java.io.IOException {
160 ResponseWriter writer = context.getResponseWriter();
161
162 writer.startElement(Attributes.REFRESH, comp);
163
164 UIForm parentForm = getParentForm(context, comp);
165 Set inputTags = RendererUtils.getInputTags(parentForm.getChildren());
166 Iterator iter = inputTags.iterator();
167
168 while(iter.hasNext()){
169 UIComponent component = (UIComponent)iter.next();
170
171 writer.startElement(Attributes.SETVAR, comp);
173 String name = RendererUtils.getAttribute(component, Attributes.NAME);
174 writer.writeAttribute(Attributes.NAME, name, null);
175
176 String value = RendererUtils.getAttribute(component, Attributes.VALUE);
177 writer.writeAttribute(Attributes.VALUE, value, null);
178 writer.endElement(Attributes.SETVAR);
179 }
180
181 writer.endElement(Attributes.REFRESH);
182 }
183
184 private boolean isReset(CommandButton comp){
185 return ("reset".compareToIgnoreCase(comp.getType()) == 0);
186 }
187
188
189 private UIForm getParentForm(FacesContext context, UIComponent component){
190 UIComponent parent = component.getParent();
192 while(parent != null && !(parent instanceof UIForm)){
193 parent = parent.getParent();
194 }
195
196 String formId;
197 if (parent == null){ throw new FacesException("FacesException - tag commandButton must be nested in a UIForm tag");
200 } else {
201 return((UIForm)parent);
202 }
203 }
204 }
205
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