private static TimingTarget getTargetHelper(
final Object object,
final String propertyName,
final KeyFrames<?> keyFrames,
final boolean isToAnimation) {
if (object == null) throw new IllegalArgumentException(I18N.err(1, "object"));
if (propertyName == null) throw new IllegalArgumentException(I18N.err(1, "propertyName"));
if (keyFrames == null) throw new IllegalArgumentException(I18N.err(1, "keyFrames"));
@SuppressWarnings("unchecked")
final KeyFrames<Object> objectKeyFrames = (KeyFrames<Object>) keyFrames;
/*
* Find the setter method for the property.
*/
Method propertySetter;
final String firstChar = propertyName.substring(0, 1);
final String remainder = propertyName.substring(1);
final String propertySetterName = "set" + firstChar.toUpperCase(Locale.ENGLISH) + remainder;
try {
final PropertyDescriptor pd =
new PropertyDescriptor(propertyName, object.getClass(), null, propertySetterName);
propertySetter = pd.getWriteMethod();
} catch (IntrospectionException e) {
throw new IllegalArgumentException(
I18N.err(30, propertySetterName, propertyName, object.toString()), e);
}
/*
* Find the getter method for the property if this is a "to" animations
*/
if (isToAnimation) {
final String propertyGetterName = "get" + firstChar.toUpperCase(Locale.ENGLISH) + remainder;
try {
final PropertyDescriptor pd =
new PropertyDescriptor(propertyName, object.getClass(), propertyGetterName, null);
final Method propertyGetter = pd.getReadMethod();
/*
* Setup "to" animation.
*/
return new PropertySetterToTimingTarget(
objectKeyFrames, object, propertyGetter, propertySetter);
} catch (IntrospectionException e) {
throw new IllegalArgumentException(
I18N.err(30, propertyGetterName, propertyName, object.toString()), e);
}
} else {
/*
* Setup animation.
*/
return new PropertySetterTimingTarget(objectKeyFrames, object, propertySetter);
}
}
@Override
public void valueAtTimingEvent(Object value, double fraction, Animator source) {
try {
f_propertySetter.invoke(f_object, value);
} catch (Exception e) {
throw new IllegalStateException(
I18N.err(31, f_propertySetter.getName(), f_object.toString()), e);
}
}
@Override
public void begin(Animator source) {
try {
final Object startValue = f_propertyGetter.invoke(f_object);
final KeyFrames.Builder<Object> builder = new KeyFrames.Builder<Object>(startValue);
boolean first = true;
for (KeyFrames.Frame<Object> frame : getKeyFrames()) {
if (first) first = false;
else builder.addFrame(frame);
}
f_keyFrames.set(builder.build());
} catch (Exception e) {
throw new IllegalStateException(
I18N.err(31, f_propertyGetter.getName(), f_object.toString()), e);
}
}
/**
* Gets and formats the string defined for the given error number from the i18 resource bundle.
* Calling this method is equivalent to calling <tt>String.format(I18N.err(number), args).</tt>
*
* <p>The key for the error message in the <tt>Err</tt> properties file is
* <tt>error.</tt><i>nnnnn</i>. For example, <tt>I18N.err(24, "bad")</tt> would result in the
* string <tt>"(Timing Framework #24) A bad problem."</tt> if the line <tt>error.00024=A %s
* problem.</tt> is contained in the <tt>Err</tt> properties file. If the key is not defined in
* the <tt>Err</tt> properties file an exception is thrown.
*
* @param number the error message number.
* @param args the variable arguments to format the resulting error message with.
* @return the formatted error message for the given number.
* @see String#format(String, Object...)
*/
@RegionEffects("reads any(java.util.ResourceBundle):Instance")
public static String err(final int number, Object... args) {
return String.format(I18N.err(number), args);
}
