#53 Added AbstractStatefulEmitHandler, test shows the example of usage.

src/main/java/org/ahocorasick/trie/Trie.java

@@ -286,7 +286,9 @@ public class Trie {
         if (emits != null && !emits.isEmpty()) {
             for (final String emit : emits) {
                 emitted = emitHandler.emit(new Emit(position - emit.length() + 1, position, emit)) || emitted;
-                if(emitted && trieConfig.isStopOnHit()) break;
+                if  (emitted && trieConfig.isStopOnHit()) {
+                    break;
+                }
             }
         }
 

src/main/java/org/ahocorasick/trie/handler/AbstractStatefulEmitHandler.java

@@ -0,0 +1,21 @@
+package org.ahocorasick.trie.handler;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.ahocorasick.trie.Emit;
+
+public abstract class AbstractStatefulEmitHandler implements StatefulEmitHandler {
+
+    private final List<Emit> emits = new ArrayList<>();
+
+    public void addEmit(final Emit emit) {
+        this.emits.add(emit);
+    }
+
+    @Override
+    public List<Emit> getEmits() {
+        return this.emits;
+    }
+
+}

src/test/java/org/ahocorasick/trie/TrieTest.java

@@ -1,5 +1,6 @@
 package org.ahocorasick.trie;
 
+import org.ahocorasick.trie.handler.AbstractStatefulEmitHandler;
 import org.ahocorasick.trie.handler.EmitHandler;
 import org.ahocorasick.trie.handler.StatefulEmitHandler;
 import org.junit.Test;
@@ -110,8 +111,7 @@ public class TrieTest {
                 .stopOnHit()
                 .build();
         
-        StatefulEmitHandler testEmitHandler = new StatefulEmitHandler() {
+        StatefulEmitHandler testEmitHandler = new AbstractStatefulEmitHandler() {
-            private final List<Emit> emits = new ArrayList<>();
             boolean first = true;
 
             @Override
@@ -121,14 +121,10 @@ public class TrieTest {
                     first = false;
                     return false;
                 }
-                this.emits.add(emit);
+                addEmit(emit);
                 return true;
             }
 
-            @Override
-            public List<Emit> getEmits() {
-                return this.emits;
-            }
         };
         
         trie.parseText("ushers", testEmitHandler);