Name: dsR10051 Date: 04/18/2001


Method
public void java.awt.im.InputContext.setCompositionEnabled(boolean)
works incorrectly under Win32 platform. When the value of
parameter is true, it neither enables the current input method for composition
nor throws UnsupportedOperationException.
The documentation for this method says:
    /**
     * Enables or disables the current input method for composition,
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * depending on the value of the parameter <code>enable</code>.
     * <p>
     * An input method that is enabled for composition interprets incoming
     * events for both composition and control purposes, while a
     * disabled input method does not interpret events for composition.
     * Note however that events are passed on to the input method regardless
     * whether it is enabled or not, and that an input method that is disabled
     * for composition may still interpret events for control purposes,
     * including to enable or disable itself for composition.
     *
     * @param enable whether to enable the current input method for composition
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * @throws UnsupportedOperationException if there is no current input
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * method available or the current input method does not support
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * the enabling/disabling operation
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     * @see #isCompositionEnabled
       ^^^^^^^^^^^^^^^^^^^^^^^^^^
     * @since 1.3
     */
    public void setCompositionEnabled(boolean enable) {

Here is minimized test:
import java.awt.im.*;

public class InputMethodTest01 {

    public static void main(String args[]) {

        InputContext ic = InputContext.getInstance();
        try {
            ic.setCompositionEnabled(true);
            if (!ic.isCompositionEnabled()) {
                System.out.println("FAILED, CompositionEnabled is false, should be true");
                System.exit(1);
            }
            ic.setCompositionEnabled(false);
            if (!ic.isCompositionEnabled()) {
                System.out.println("FAILED, CompositionEnabled is true, should be false");
                System.exit(1);
            }
        } catch (UnsupportedOperationException uoe) {
            System.out.println(uoe);
        }
        System.out.println("OKAY");
    }
}
--- Output ---

M:\bin>J:\JDK1.4.0beta-b60\win32\bin\java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b60)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b60, mixed mode)

M:\bin>J:\JDK1.4.0beta-b60\win32\bin\java InputMethodTest01
FAILED, CompositionEnabled is false, should be true

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