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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.CommandLink;
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
44 public class CommandLinkRenderer extends WmlRenderer {
45 private static Log log = LogFactory.getLog(CommandLinkRenderer.class);
46
47
48 public CommandLinkRenderer() {
49 super();
50 log.debug("created object " + this.getClass().getName());
51 }
52
53 public boolean getRendersChildren(){
54 return(false);
55 }
56
57 public void encodeBegin(FacesContext context, UIComponent component) throws java.io.IOException {
58 log.debug("encodeBegin(" + component.getId() + ")");
59 if (context == null || component == null) {
60 throw new NullPointerException ();
61 }
62 if (!component.isRendered()) return;
63
64 CommandLink comp = (CommandLink)component;
65 ResponseWriter writer = context.getResponseWriter();
66
67 writer.startElement(Attributes.ANCHOR, component);
68 RendererUtils.writeAttribute(Attributes.TITLE, comp.getTitle(), writer);
69 writer.flush();
70 }
71
72 public void encodeChildren(FacesContext context, UIComponent component) throws java.io.IOException {
73 log.debug("encodeChildren(" + component.getId() + ")");
74 if (context == null || component == null) {
75 throw new NullPointerException ();
76 }
77 if (!component.isRendered()) return;
78
79 RendererUtils.renderChildren(context, component);
80 }
81
82 public void encodeEnd(FacesContext context, UIComponent component) throws java.io.IOException {
83 log.debug("encodeEnd(" + component.getId() + ")");
84 if (context == null || component == null) {
85 throw new NullPointerException ();
86 }
87 if (!component.isRendered()) return;
88
89 CommandLink comp = (CommandLink)component;
90 UIForm parentForm = getParentForm(context, component);
91
92 ResponseWriter writer = context.getResponseWriter();
93
94 String href = RendererUtils.getCurrentUrl(context);
95
96 writer.startElement(Attributes.GO, component);
98 writer.writeAttribute(Attributes.HREF, href, null);
99 writer.writeAttribute(Attributes.METHOD, Attributes.POST, null);
100
101 Set inputTags = RendererUtils.getInputTags(parentForm.getChildren());
102 Iterator iter = inputTags.iterator();
103
104 log.debug("Form has " + inputTags.size() + " input tags.");
105
106 while(iter.hasNext()){
107 UIComponent inputComp = (UIComponent)iter.next();
108 String name = RendererUtils.getAttribute(inputComp, Attributes.NAME);
109
110 writer.startElement(Attributes.POSTFIELD, component);
112 writer.writeAttribute(Attributes.NAME, name, null);
113 writer.writeAttribute(Attributes.VALUE, "$(" + name + ")", null);
114 writer.endElement(Attributes.POSTFIELD);
115 }
116
117 writer.startElement(Attributes.POSTFIELD, component);
119 writer.writeAttribute(Attributes.NAME, parentForm.getClientId(context) + Attributes.POSTFIX_SUBMITED, null);
120 writer.writeAttribute(Attributes.VALUE, "true", null);
121 writer.endElement(Attributes.POSTFIELD);
122
123 writer.startElement(Attributes.POSTFIELD, component);
125 writer.writeAttribute(Attributes.NAME, component.getClientId(context) + Attributes.POSTFIX_ACTIVATED, null);
126 writer.writeAttribute(Attributes.VALUE, "true", null);
127 writer.endElement(Attributes.POSTFIELD);
128
129 writer.endElement(Attributes.GO);
130 writer.endElement(Attributes.ANCHOR);
131 }
132
133 public void decode(FacesContext context, UIComponent component) {
134 log.debug("decode(" + component.getId() + ")");
135 if (component == null || context == null) throw new NullPointerException ();
136 if (!component.isRendered()) return;
137
138 Map map = context.getExternalContext().getRequestParameterMap();
139
140 if (map.containsKey(component.getClientId(context) + Attributes.POSTFIX_ACTIVATED))
142 component.queueEvent(new ActionEvent(component));
143 }
144
145 private UIForm getParentForm(FacesContext context, UIComponent component){
146 UIComponent parent = component.getParent();
148 while(parent != null && !(parent instanceof UIForm)){
149 parent = parent.getParent();
150 }
151
152 String formId;
153 if (parent == null){ throw new FacesException("FacesException - tag commandLink must be nested in a UIForm tag");
156 } else {
157 return((UIForm)parent);
158 }
159 }
160
161 }
162
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