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package jsf2;
import java.beans.BeanDescriptor;
import java.beans.BeanInfo;
import java.beans.FeatureDescriptor;
import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.view.AttachedObjectTarget;
public class CompositeComponentMetadataUtils {
/**
* <p>Use the composite component metadata specification
* in section JSF.3.6.2.1 to print out the metadata to
* the argument writer.</p>
* @throws IOException
*/
public static void writeMetadata(BeanInfo metadata,
ResponseWriter writer) throws IOException{
// Print out the top level BeanDescriptor stuff.
BeanDescriptor descriptor = metadata.getBeanDescriptor();
writeFeatureDescriptor("composite-component-BeanDescriptor", descriptor,
writer);
writeFeatureDescriptorValues(
"composite-component-BeanDescriptor", descriptor,
writer);
PropertyDescriptor attributes[] = metadata.getPropertyDescriptors();
for (PropertyDescriptor cur : attributes) {
writeFeatureDescriptor("composite-component-attribute", cur,
writer);
writeFeatureDescriptorValues("composite-component-attribute", cur,
writer);
}
}
public static void writeFeatureDescriptor(String prefix,
FeatureDescriptor fd, ResponseWriter writer) throws IOException {
writer.write(prefix + "-name:" +
fd.getName() + "\n");
writer.write(prefix + "-displayName:" +
fd.getDisplayName() + "\n");
writer.write(prefix + "-shortDescription:" +
fd.getShortDescription() + "\n");
writer.write(prefix + "-expert:" +
fd.isExpert() + "\n");
writer.write(prefix + "-hidden:" +
fd.isHidden() + "\n");
writer.write(prefix + "-preferred:" +
fd.isPreferred() + "\n");
}
public static void writeFeatureDescriptorValues(String prefix,
FeatureDescriptor fd, ResponseWriter writer) throws IOException {
Enumeration<String> extraValues = fd.attributeNames();
String curName;
while (extraValues.hasMoreElements()) {
curName = extraValues.nextElement();
if (curName.equals(AttachedObjectTarget.ATTACHED_OBJECT_TARGETS_KEY)) {
List<AttachedObjectTarget> attachedObjects =
(List<AttachedObjectTarget>) fd.getValue(curName);
for (AttachedObjectTarget curTarget : attachedObjects) {
writer.write(prefix + "-attached-object-" + curTarget.getName() + "\n");
}
} else if (curName.equals(UIComponent.FACETS_KEY)) {
Map<String, PropertyDescriptor> facets =
(Map<String, PropertyDescriptor>) fd.getValue(curName);
for (String cur : facets.keySet()) {
String facetPrefix = prefix + "-facet-" + cur;
writeFeatureDescriptor(facetPrefix, facets.get(cur),
writer);
writeFeatureDescriptorValues(facetPrefix,
facets.get(cur), writer);
}
} else {
ValueExpression ve = (ValueExpression) fd.getValue(curName);
writer.write(prefix + "-extra-attribute-" + curName + ": " +
ve.getValue(FacesContext.getCurrentInstance().getELContext())
+ "\n");
}
}
}
}