001 package edu.nrao.sss.webapp.faces.component;
002
003 import javax.faces.component.UIInput;
004 import javax.faces.context.FacesContext;
005 import javax.faces.context.ResponseWriter;
006 import javax.faces.el.ValueBinding;
007
008 import edu.nrao.sss.measure.Frequency;
009 import edu.nrao.sss.measure.FrequencyRange;
010 import edu.nrao.sss.measure.FrequencyUnits;
011 import edu.nrao.sss.util.EnumerationUtility;
012 import edu.nrao.sss.util.FormatString;
013 import edu.nrao.sss.util.StringUtil;
014
015 import java.io.IOException;
016 import java.util.Map;
017 import java.util.EnumSet;
018 import java.math.BigDecimal;
019
020 import org.apache.log4j.Logger;
021
022 public class FrequencyRangeUIComponent extends UIInput
023 {
024 private static final Logger log = Logger.getLogger(FrequencyRangeUIComponent.class);
025 private static final StringUtil sUtil = StringUtil.getInstance();
026 private static final EnumSet<FrequencyUnits> unitSet = EnumerationUtility.getSharedInstance().getSelectableSetFor(FrequencyUnits.class);
027
028 private Boolean enabled = null;
029
030 public void encodeBegin(FacesContext context)
031 throws IOException
032 {
033 FrequencyRange r = (FrequencyRange)getValue();
034 String styleClass = (String)getAttributes().get("styleClass");
035 String style = (String)getAttributes().get("style");
036
037 ResponseWriter writer = context.getResponseWriter();
038
039 String clientId = getClientId(context);
040 String startId = clientId + "start";
041 String endId = clientId + "end";
042 String unitId = clientId + "units";
043
044 writer.startElement("span", this);
045 writer.writeAttribute("class", styleClass, null);
046 writer.writeAttribute("style", style, null);
047 writer.writeAttribute("id", clientId, null);
048
049 //Label and input field for Low frequency.
050 writer.startElement("label", this);
051 writer.writeAttribute("for", startId, null);
052 writer.write(" from ");
053 writer.endElement("label");
054
055 FrequencyUnits lowUnits = r.getLowFrequency().getUnits();
056 if (!lowUnits.equals(r.getHighFrequency().getUnits()))
057 {
058 r.convertTo(lowUnits);
059 }
060
061 BigDecimal low = r.getLowFrequency().getValue();
062 String lowStr = sUtil.formatNoScientificNotation(low);
063
064 if (isEnabled())
065 {
066 writer.startElement("input", this);
067 writer.writeAttribute("type", "text", null);
068 writer.writeAttribute("id", startId, null);
069 writer.writeAttribute("name", startId, null);
070 writer.writeAttribute("value", lowStr, null);
071 writer.writeAttribute("onblur", "iceSubmitPartial(form, this, event); return false;", null);
072 writer.endElement("input");
073 }
074
075 else
076 {
077 writer.startElement("span", this);
078 writer.writeAttribute("id", startId, null);
079 writer.write(lowStr);
080 writer.endElement("span");
081 }
082
083 //Label and input field for High frequency.
084 writer.startElement("label", this);
085 writer.writeAttribute("for", endId, null);
086 writer.write(" to ");
087 writer.endElement("label");
088
089 BigDecimal high = r.getHighFrequency().getValue();
090 String highStr = sUtil.formatNoScientificNotation(high);
091
092 if (isEnabled())
093 {
094 writer.startElement("input", this);
095 writer.writeAttribute("type", "text", null);
096 writer.writeAttribute("id", endId, null);
097 writer.writeAttribute("name", endId, null);
098 writer.writeAttribute("value", highStr, null);
099 writer.writeAttribute("onblur", "iceSubmitPartial(form, this, event); return false;", null);
100 writer.endElement("input");
101 }
102
103 else
104 {
105 writer.startElement("span", this);
106 writer.writeAttribute("id", endId, null);
107 writer.write(highStr);
108 writer.endElement("span");
109 }
110
111 //Label and select menu for frequency units.
112 writer.startElement("label", this);
113 writer.writeAttribute("for", unitId, null);
114 writer.write(" in ");
115 writer.endElement("label");
116
117 if (isEnabled())
118 {
119 writer.startElement("select", this);
120 writer.writeAttribute("name", unitId, null);
121 writer.writeAttribute("onchange", "iceSubmitPartial(form, this, event); return false;", null);
122
123 //Write out the option elements.
124 for (FrequencyUnits unit : unitSet)
125 {
126 writer.startElement("option", this);
127 if(unit.equals(lowUnits))
128 {
129 writer.writeAttribute("selected", "selected", null);
130 }
131
132 writer.writeAttribute("label", unit.getSymbol(), null);
133 writer.writeAttribute("value", unit.getSymbol(), null);
134
135 writer.write(unit.getSymbol());
136 writer.endElement("option");
137 }
138
139 writer.endElement("select");
140 }
141
142 else
143 {
144 writer.startElement("span", this);
145 writer.writeAttribute("id", unitId, null);
146 writer.write(lowUnits.getSymbol());
147 writer.endElement("span");
148 }
149 writer.endElement("span");
150 }
151
152 public void decode(FacesContext context)
153 {
154 String startId = getClientId(context) + "start";
155 String endId = getClientId(context) + "end";
156 String unitId = getClientId(context) + "units";
157
158 Map parms = context.getExternalContext().getRequestParameterMap();
159 String start = (String)parms.get(startId);
160 String end = (String)parms.get(endId);
161 String unit = (String)parms.get(unitId);
162
163 if (start == null || end == null || unit == null)
164 {
165 log.debug("calling setSubmittedValue(null)!");
166 setSubmittedValue(null);
167 }
168
169 else
170 {
171 log.debug("Submitting: " + start + unit + " - " + end + unit);
172 setValid(true);
173
174 // Adding code to automatically adjust the 2 frequencies if only 1 is
175 // input and it causes the start to be > the end.
176 try
177 {
178 Frequency sf = Frequency.parse(start);
179 Frequency ef = Frequency.parse(end);
180
181 if (sf.compareTo(ef) > 0)
182 end = start;
183 }
184
185 // Ignore exceptions and just set the submitted value... it'll be
186 // re-parsed and those exceptions will be caught appropriately.
187 catch (Exception e) {}
188
189 setSubmittedValue(start + unit + FormatString.ENDPOINT_SEPARATOR + end + unit);
190 }
191 }
192
193 public Boolean isEnabled()
194 {
195 if (this.enabled != null)
196 return this.enabled;
197
198 ValueBinding vb = getValueBinding("enabled");
199 if (vb != null)
200 {
201 Object val = vb.getValue(getFacesContext());
202
203 if (val instanceof Boolean && val != null)
204 return (Boolean)val;
205 }
206
207 //else
208 return Boolean.TRUE;
209 }
210
211 public void setEnabled(Boolean e)
212 {
213 this.enabled = e;
214 }
215
216 public Object saveState(FacesContext context)
217 {
218 Object[] state = new Object[2];
219 state[0] = super.saveState(context);
220 state[1] = this.enabled;
221
222 return state;
223 }
224
225 public void restoreState(FacesContext context, Object state)
226 {
227 Object[] myState = (Object[])state;
228 super.restoreState(context, myState[0]);
229 setEnabled((Boolean)myState[1]);
230 }
231
232 /**
233 * Overridden to be empty.
234 */
235 public void encodeEnd(FacesContext context) throws IOException {}
236
237 /**
238 * Overridden to be empty.
239 */
240 public void encodeChildren(FacesContext context) throws IOException {}
241
242 protected Object getConvertedValue(FacesContext ctx, Object v)
243 {
244 Object c = super.getConvertedValue(ctx, v);
245 log.debug("getConvertedValue returned: " + c);
246 return c;
247 }
248
249 public void updateModel(javax.faces.context.FacesContext context)
250 {
251 log.debug("in updateModel: valid=" + isValid());
252 super.updateModel(context);
253 }
254
255 public void processValidators(javax.faces.context.FacesContext context)
256 {
257 log.debug("before processValidators: valid=" + isValid());
258 super.processValidators(context);
259 log.debug("after processValidators: valid=" + isValid());
260 }
261 }