utility functions for standard status text and colours

refs 2553

org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/utils/ConstraintsUtils.java

@@ -31,7 +31,7 @@ import org.fortiss.tooling.kernel.model.constraints.SuccessVerificationStatus;
  * @author aravantinos
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: 1EE7F9BAEAF62D5E8C843797A8177D77
+ * @ConQAT.Rating YELLOW Hash: 1325BAE0A0C28B3F093D89D912BE1AFF
  */
 public class ConstraintsUtils {
 	/**
@@ -39,8 +39,18 @@ public class ConstraintsUtils {
 	 * @param clazz
 	 * @return <code>true</code> if <code>c</code> contains a constraint of type <code>clazz</code>.
 	 */
-	public static boolean containsConstraintOfType(IConstrained c, Class<?> clazz) {
-		return !EcoreUtils.pickInstanceOf(clazz, c.getConstraints()).isEmpty();
+	public static boolean containsConstraintOfType(IConstrained c,
+			Class<? extends IConstraint> clazz) {
+		return getConstraintOfType(c, clazz) != null;
+	}
+
+	/**
+	 * @param c
+	 * @param clazz
+	 * @return the first constraint of <code>c</code> of type <code>clazz</code>.
+	 */
+	public static <T extends IConstraint> T getConstraintOfType(IConstrained c, Class<T> clazz) {
+		return EcoreUtils.pickFirstInstanceOf(clazz, c.getConstraints());
 	}
 
 	/** Exception which embeds an error. */