change signature of all comparator methods

hamcrest/src/main/java/org/hamcrest/Matchers.java

@@ -1299,7 +1299,7 @@ public static org.hamcrest.Matcher<java.math.BigDecimal> closeTo(java.math.BigDe
    * 
    * @param value the value which, when passed to the compareTo method of the examined object, should return zero
    */
-  public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> comparesEqualTo(T value) {
+  public static <T extends java.lang.Comparable<? super T>> org.hamcrest.Matcher<T> comparesEqualTo(T value) {
     return org.hamcrest.number.OrderingComparison.comparesEqualTo(value);
   }
 
@@ -1313,7 +1313,7 @@ public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> compar
    * @param value the value which, when passed to the compareTo method of the examined object, should return greater
    *              than zero
    */
-  public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> greaterThan(T value) {
+  public static <T extends java.lang.Comparable<? super T>> org.hamcrest.Matcher<T> greaterThan(T value) {
     return org.hamcrest.number.OrderingComparison.greaterThan(value);
   }
 
@@ -1327,7 +1327,7 @@ public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> greate
    * @param value the value which, when passed to the compareTo method of the examined object, should return greater
    *              than or equal to zero
    */
-  public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> greaterThanOrEqualTo(T value) {
+  public static <T extends java.lang.Comparable<? super T>> org.hamcrest.Matcher<T> greaterThanOrEqualTo(T value) {
     return org.hamcrest.number.OrderingComparison.greaterThanOrEqualTo(value);
   }
 
@@ -1341,7 +1341,7 @@ public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> greate
    * @param value the value which, when passed to the compareTo method of the examined object, should return less
    *              than zero
    */
-  public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> lessThan(T value) {
+  public static <T extends java.lang.Comparable<? super T>> org.hamcrest.Matcher<T> lessThan(T value) {
     return org.hamcrest.number.OrderingComparison.lessThan(value);
   }
 
@@ -1355,7 +1355,7 @@ public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> lessTh
    * @param value the value which, when passed to the compareTo method of the examined object, should return less
    *              than or equal to zero
    */
-  public static <T extends java.lang.Comparable<T>> org.hamcrest.Matcher<T> lessThanOrEqualTo(T value) {
+  public static <T extends java.lang.Comparable<? super T>> org.hamcrest.Matcher<T> lessThanOrEqualTo(T value) {
     return org.hamcrest.number.OrderingComparison.lessThanOrEqualTo(value);
   }
 

hamcrest/src/main/java/org/hamcrest/comparator/ComparatorMatcherBuilder.java

@@ -18,7 +18,7 @@ public final class ComparatorMatcherBuilder<T> {
      * For example:
      * <pre>assertThat(1, ComparatorMatcherBuilder.&lt;Integer&gt;usingNaturalOrdering().lessThanOrEqualTo(1))</pre>
      */
-    public static <T extends Comparable<T>> ComparatorMatcherBuilder<T> usingNaturalOrdering() {
+    public static <T extends Comparable<? super T>> ComparatorMatcherBuilder<T> usingNaturalOrdering() {
         return new ComparatorMatcherBuilder<T>(new Comparator<T>() {
             @Override
             public int compare(T o1, T o2) {

hamcrest/src/main/java/org/hamcrest/number/OrderingComparison.java

@@ -17,7 +17,7 @@ private OrderingComparison() {
      *
      * @param value the value which, when passed to the compareTo method of the examined object, should return zero
      */
-    public static <T extends Comparable<T>> Matcher<T> comparesEqualTo(T value) {
+    public static <T extends Comparable<? super T>> Matcher<T> comparesEqualTo(T value) {
         return ComparatorMatcherBuilder.<T>usingNaturalOrdering().comparesEqualTo(value);
     }
 
@@ -31,7 +31,7 @@ public static <T extends Comparable<T>> Matcher<T> comparesEqualTo(T value) {
      * @param value the value which, when passed to the compareTo method of the examined object, should return greater
      *              than zero
      */
-    public static <T extends Comparable<T>> Matcher<T> greaterThan(T value) {
+    public static <T extends Comparable<? super T>> Matcher<T> greaterThan(T value) {
         return ComparatorMatcherBuilder.<T>usingNaturalOrdering().greaterThan(value);
     }
 
@@ -45,7 +45,7 @@ public static <T extends Comparable<T>> Matcher<T> greaterThan(T value) {
      * @param value the value which, when passed to the compareTo method of the examined object, should return greater
      *              than or equal to zero
      */
-    public static <T extends Comparable<T>> Matcher<T> greaterThanOrEqualTo(T value) {
+    public static <T extends Comparable<? super T>> Matcher<T> greaterThanOrEqualTo(T value) {
         return ComparatorMatcherBuilder.<T>usingNaturalOrdering().greaterThanOrEqualTo(value);
     }
 
@@ -59,7 +59,7 @@ public static <T extends Comparable<T>> Matcher<T> greaterThanOrEqualTo(T value)
      * @param value the value which, when passed to the compareTo method of the examined object, should return less
      *              than zero
      */
-    public static <T extends Comparable<T>> Matcher<T> lessThan(T value) {
+    public static <T extends Comparable<? super T>> Matcher<T> lessThan(T value) {
         return ComparatorMatcherBuilder.<T>usingNaturalOrdering().lessThan(value);
     }
 
@@ -73,7 +73,7 @@ public static <T extends Comparable<T>> Matcher<T> lessThan(T value) {
      * @param value the value which, when passed to the compareTo method of the examined object, should return less
      *              than or equal to zero
      */
-    public static <T extends Comparable<T>> Matcher<T> lessThanOrEqualTo(T value) {
+    public static <T extends Comparable<? super T>> Matcher<T> lessThanOrEqualTo(T value) {
         return ComparatorMatcherBuilder.<T>usingNaturalOrdering().lessThanOrEqualTo(value);
     }
 }