Name: ooR10001 Date: 06/18/2001


javax.swing.SpringLayout.getConstraints(Component c) method does not match the
specification because it does not check "constraints" client property of the
component c if c is instance of JComponent and no constraints has been
registered for this component. It contradicts with current JavaDoc.

Javadoc says:

-------------------------------------------
getConstraints

public SpringLayout.Constraints getConstraints(Component c)

      Returns the constraints for the specified component. Note that, unlike
      the GridBagLayout, constraints are not cloned by this method. If no
                                                                    ^^^^^
      constraint has been registered for this component and the component is a
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      JComponent, this method checks the "constraints" client property of the
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      component.
      ^^^^^^^^^^
      ...............
-------------------------------------------

This test shows a bug:
----------- test.java ------------
import javax.swing.JComponent;
import javax.swing.SpringLayout;
import javax.swing.SpringLayout.Constraints;
import javax.swing.JButton;

class Stub extends SpringLayout.Constraints {
}

public class test {

  public static void main(String[] args) {
      JComponent comp = new JButton();
      SpringLayout sp = new SpringLayout();
      Stub stub = new Stub();
      comp.putClientProperty("constraints", stub);
      if (sp.getConstraints(comp) instanceof Stub) {
          System.out.println("OKAY");
      } else {
          System.out.println("FAILED");
      }
  }

}
----------------------------------

Output:
-----------------------------
% java -version

java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)

% java test

FAILED

-----------------------------

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