/**
* Find the class for the projection
*
* @param proj projection
* @return corresponding ProjectionClass (or null if not found)
*/
private ProjectionClass findProjectionClass(Projection proj) {
Class want = proj.getClass();
ComboBoxModel projClassList = projClassCB.getModel();
for (int i = 0; i < projClassList.getSize(); i++) {
ProjectionClass pc = (ProjectionClass) projClassList.getElementAt(i);
if (want.equals(pc.projClass)) {
return pc;
}
}
return null;
}
/**
* Make the default projections from the internal list of classes.
*
* @return list of default projections
*/
public static List makeDefaultProjections() {
List defaults = new ArrayList();
List classNames = getDefaultProjections();
for (int i = 0; i < classNames.size(); i++) {
String className = (String) classNames.get(i);
try {
Class projClass = Misc.findClass(className);
ProjectionImpl pi = (ProjectionImpl) projClass.newInstance();
pi.setName("Default " + pi.getProjectionTypeLabel());
defaults.add(pi);
} catch (Exception ee) {
System.err.println("Error creating default projection: " + className);
ee.printStackTrace();
}
}
return defaults;
}
/**
* Return a String representation of the object
*
* @return a String representation of the object
*/
public String toString() {
return paramType.getName()
+ " "
+ name
+ " "
+ ((reader == null) ? "-" : "R")
+ ((writer == null) ? "-" : "W");
}
/**
* Create the default projection for the default class
*
* @return a default projection
*/
private ProjectionImpl makeDefaultProjection() {
// the default constructor
try {
Constructor c = projClass.getConstructor(VOIDCLASSARG);
return (ProjectionImpl) c.newInstance(VOIDOBJECTARG);
} catch (Exception ee) {
System.err.println(
"ProjectionManager makeDefaultProjection failed to construct class " + projClass);
System.err.println(" " + ee);
return null;
}
}
/**
* 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();
}
}
