This class enables one to store an entry in the defaults
table that isn't constructed until the first time it's
looked up with one of the
getXXX(key) methods.
Lazy values are useful for defaults that are expensive
to construct or are seldom retrieved. The first time
a
LazyValue is retrieved its "real value" is computed
by calling
LazyValue.createValue() and the real
value is used to replace the
LazyValue in the
UIDefaults
table. Subsequent lookups for the same key return
the real value. Here's an example of a
LazyValue
that constructs a
Border:
Object borderLazyValue = new UIDefaults.LazyValue() {
public Object createValue(UIDefaults table) {
return new BorderFactory.createLoweredBevelBorder();
}
};
uiDefaultsTable.put("MyBorder", borderLazyValue);