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16 package org.apache.myfaces.wap.renderkit.wml;
17
18 import java.io.IOException  ;
19 import java.util.Iterator ;
20
21 import javax.faces.component.UIColumn;
22 import javax.faces.component.UIComponent;
23 import javax.faces.component.UIData;
24 import javax.faces.context.FacesContext;
25 import javax.faces.context.ResponseWriter;
26
27 import org.apache.commons.logging.Log;
28 import org.apache.commons.logging.LogFactory;
29 import org.apache.myfaces.wap.component.DataTable;
30 import org.apache.myfaces.wap.renderkit.Attributes;
31 import org.apache.myfaces.wap.renderkit.RendererUtils;
32 import org.apache.myfaces.wap.renderkit.WmlRenderer;
33
34
35
43 public class TableRenderer extends WmlRenderer {
44 private static Log log = LogFactory.getLog(TableRenderer.class);
45
46
47 public TableRenderer() {
48 super();
49 log.debug("created object " + this.getClass().getName());
50 }
51
52 public boolean getRendersChildren(){
53 return(true);
54 }
55
56 public void encodeBegin(FacesContext context, UIComponent component) throws java.io.IOException {
57 log.debug("encodeBegin(" + component.getId() + ")");
58
59 if (context == null || component == null) {
60 throw new NullPointerException ();
61 }
62 if (!component.isRendered()) return;
63 }
65
66 public void encodeChildren(FacesContext context, UIComponent component) throws java.io.IOException {
67 log.debug("encodeChildren(" + component.getId() + ")");
68 if (context == null || component == null) {
69 throw new NullPointerException ();
70 }
71 if (!component.isRendered()) return;
72
73 }
75
76 public void encodeEnd(FacesContext context, UIComponent component) throws java.io.IOException {
77 log.debug("encodeEnd(" + component.getId() + ")");
78 if (context == null || component == null) {
79 throw new NullPointerException ();
80 }
81 if (!component.isRendered()) return;
82
83 ResponseWriter writer = context.getResponseWriter();
84 DataTable comp = (DataTable)component;
85
86 int columns = component.getChildCount();
88
89 if (columns == 0) return;
91
92 writer.startElement(Attributes.TABLE, component);
93 RendererUtils.writeAttribute(Attributes.ID, comp.getClientId(context), writer);
94 RendererUtils.writeAttribute(Attributes.CLASS, comp.getStyleClass(), writer);
95 RendererUtils.writeAttribute(Attributes.XML_LANG, comp.getXmllang(), writer);
96
97 RendererUtils.writeAttribute(Attributes.ALIGN, comp.getAlign(), writer);
98
99 RendererUtils.writeAttribute(Attributes.COLUMNS, new Integer (columns), writer);
100 RendererUtils.writeAttribute(Attributes.TITLE, comp.getTitle(), writer);
101
102 if (hasHeaderOrFooter(context, component, true))
103 renderHeaderOrFooter(context, component, true);
104
105 renderChildren(context, component);
106
107 if (hasHeaderOrFooter(context, component, false))
108 renderHeaderOrFooter(context, component, false);
109
110 writer.endElement(Attributes.TABLE);
111 }
112
113 public void decode(FacesContext context, UIComponent component) {
114 if (component == null ) throw new NullPointerException ();
115 }
116
117 private void renderChildren(FacesContext context, UIComponent component) throws IOException {
118 ResponseWriter writer = context.getResponseWriter();
119
120
121 log.debug("Childern: " + component.getChildCount() + " of Component " + component.getFamily());
122
123 UIData comp = (UIData)component;
124
125 int first = comp.getFirst();
126 int rows = comp.getRows();
127 int rowCount = comp.getRowCount();
128 if (rows <= 0) {
129 rows = rowCount - first;
130 }
131 int last = first + rows;
132 if (last > rowCount) last = rowCount;
133
134 for (int i = first; i < last; i++){
135 writer.startElement(Attributes.TR, component);
136 comp.setRowIndex(i);
137
138 if (!comp.isRowAvailable()){
139 log.error("Row: " + i + " is not available.");
140 continue;
141 }
142
143 Iterator columns = component.getChildren().iterator();
144 while (columns.hasNext()){
145 UIComponent column = (UIComponent)columns.next();
146 if (!(column instanceof UIColumn)) {
147 log.error("Only column elements can be nested in dataTable.");
148 break;
149 }
150
151 writer.startElement(Attributes.TD, component);
152 RendererUtils.renderChild(context, column);
153 writer.endElement(Attributes.TD);
154 }
155 writer.endElement(Attributes.TR);
156 }
157 }
158
159
160 private void renderHeaderOrFooter(FacesContext context, UIComponent component, boolean header) throws IOException {
161 ResponseWriter writer = context.getResponseWriter();
162
163 writer.startElement(Attributes.TR, component);
164
165 Iterator columns = component.getChildren().iterator();
166 while (columns.hasNext()){
167 UIComponent column = (UIComponent)columns.next();
168 if (!(column instanceof UIColumn)) {
169 log.error("Only column elements can be nested in dataTable.");
170 break;
171 }
172
173 UIComponent facet = header ? ((UIColumn)column).getHeader() : ((UIColumn)column).getFooter();
174
175 writer.startElement(Attributes.TD, component);
176 RendererUtils.renderChild(context, facet);
177 writer.endElement(Attributes.TD);
178 }
179 writer.endElement(Attributes.TR);
180 }
181
182
183 private boolean hasHeaderOrFooter(FacesContext context, UIComponent component, boolean header){
184 Iterator childn = component.getChildren().iterator();
185 while (childn.hasNext()){
186 UIComponent child = (UIComponent)childn.next();
187 if (child instanceof UIColumn && child.isRendered()){
188 if (header) {
189 if (((UIColumn)child).getHeader() != null) return(true);
190 }
191 else{
192 if (((UIColumn)child).getFooter() != null) return(true);
193 }
194 }
195 }
196 return (false);
197 }
198 }
199
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