/**
* Creates an <code>ComponentUI</code> implementation for the specified component. In other words
* create the look and feel specific delegate object for <code>target</code>. This is done in two
* steps:
*
* <ul>
* <li>Look up the name of the <code>ComponentUI</code> implementation class under the value
* returned by <code>target.getUIClassID()</code>.
* <li>Use the implementation classes static <code>createUI()</code> method to construct a look
* and feel delegate.
* </ul>
*
* @param target the <code>JComponent</code> which needs a UI
* @return the <code>ComponentUI</code> object
*/
public ComponentUI getUI(JComponent target) {
Object cl = get("ClassLoader");
ClassLoader uiClassLoader =
(cl != null) ? (ClassLoader) cl : target.getClass().getClassLoader();
Class<? extends ComponentUI> uiClass = getUIClass(target.getUIClassID(), uiClassLoader);
Object uiObject = null;
if (uiClass == null) {
getUIError("no ComponentUI class for: " + target);
} else {
try {
Method m = (Method) get(uiClass);
if (m == null) {
m = uiClass.getMethod("createUI", new Class[] {JComponent.class});
put(uiClass, m);
}
uiObject = MethodUtil.invoke(m, null, new Object[] {target});
} catch (NoSuchMethodException e) {
getUIError("static createUI() method not found in " + uiClass);
} catch (Exception e) {
getUIError("createUI() failed for " + target + " " + e);
}
}
return (ComponentUI) uiObject;
}
/**
* Create a new ProjectionClass from the class
*
* @param pc projection class
* @throws ClassNotFoundException couldn't find the class
* @throws IntrospectionException problem with introspection
*/
ProjectionClass(Class pc) throws ClassNotFoundException, IntrospectionException {
projClass = pc;
// eliminate common properties with "stop class" for getBeanInfo()
Class stopClass;
try {
stopClass = Misc.findClass("ucar.unidata.geoloc.ProjectionImpl");
} catch (Exception ee) {
System.err.println("constructParamInput failed ");
stopClass = null;
}
// analyze current projection class as a bean; may throw IntrospectionException
BeanInfo info = java.beans.Introspector.getBeanInfo(projClass, stopClass);
// find read/write methods
PropertyDescriptor[] props = info.getPropertyDescriptors();
if (debugBeans) {
System.out.print("Bean Properties for class " + projClass);
if ((props == null) || (props.length == 0)) {
System.out.println("none");
return;
}
System.out.println("");
}
for (int i = 0; i < props.length; i++) {
PropertyDescriptor pd = props[i];
Method reader = pd.getReadMethod();
Method writer = pd.getWriteMethod();
// only interesetd in read/write properties
if ((reader == null) || (writer == null)) {
continue;
}
// A hack to exclude some attributes
if (pd.getName().equals("name") || pd.getName().equals("defaultMapArea")) {
continue;
}
ProjectionParam p = new ProjectionParam(pd.getName(), reader, writer, pd.getPropertyType());
paramList.add(p);
if (debugBeans) {
System.out.println(" -->" + p);
}
}
// get an instance of this class so we can call toClassName()
Projection project;
if (null == (project = makeDefaultProjection())) {
name = "none";
return;
}
// invoke the toClassName method
try {
Method m = projClass.getMethod("getProjectionTypeLabel", VOIDCLASSARG);
name = (String) m.invoke(project, VOIDOBJECTARG);
} catch (NoSuchMethodException ee) {
System.err.println(
"ProjectionManager: class "
+ projClass
+ " does not have method getProjectionTypeLabel()");
throw new ClassNotFoundException();
} catch (SecurityException ee) {
System.err.println(
"ProjectionManager: class "
+ projClass
+ " got SecurityException on getProjectionTypeLabel()"
+ ee);
throw new ClassNotFoundException();
} catch (Exception ee) {
System.err.println(
"ProjectionManager: class "
+ projClass
+ " Exception when invoking getProjectionTypeLabel()"
+ ee);
throw new ClassNotFoundException();
}
}