add method to unregister rule by name ( issue 64 )

easy-rules-core/src/main/java/org/jeasy/rules/api/Rules.java

@@ -87,6 +87,18 @@ public class Rules implements Iterable<Rule> {
         rules.remove(RuleProxy.asRule(rule));
     }
 
+    /**
+     * Unregister a rule by name.
+     *
+     * @param ruleName the name of the rule to unregister
+     */
+    public void unregister(final String ruleName){
+        Rule rule = findRuleByName(ruleName);
+        if(rule != null) {
+            unregister(rule);
+        }
+    }
+
     /**
      * Check if the rule set is empty.
      *
@@ -114,4 +126,12 @@ public class Rules implements Iterable<Rule> {
     public void sort() {
         rules = new TreeSet<>(rules);
     }
+
+    private Rule findRuleByName(String ruleName){
+        for(Rule rule : rules){
+            if(rule.getName().equalsIgnoreCase(ruleName))
+                return rule;
+        }
+        return null;
+    }
 }

easy-rules-core/src/test/java/org/jeasy/rules/api/RulesTest.java

@@ -1,3 +1,26 @@
+/**
+ * The MIT License
+ *
+ *  Copyright (c) 2017, Mahmoud Ben Hassine (mahmoud.benhassine@icloud.com)
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ *  THE SOFTWARE.
+ */
 package org.jeasy.rules.api;
 
 import org.jeasy.rules.annotation.Action;
@@ -43,6 +66,20 @@ public class RulesTest {
         assertThat(rules).isEmpty();
     }
 
+    @Test
+    public void unregisterByName() throws Exception {
+        Rule r1 = new BasicRule("rule1");
+        Rule r2 = new BasicRule("rule2");
+        Set<Rule> ruleSet = new HashSet<>();
+        ruleSet.add(r1);
+        ruleSet.add(r2);
+
+        rules = new Rules(ruleSet);
+        rules.unregister("rule2");
+
+        assertThat(rules).hasSize(1).containsExactly(r1);
+    }
+
     @Test
     public void isEmpty() throws Exception {
         assertThat(rules.isEmpty()).isTrue();