Emit now also contains the start position of the found keyword

src/main/java/org/ahocorasick/Emit.java

@@ -1,16 +1,22 @@
 package org.ahocorasick;
 
 public class Emit {
-    private final int position;
+    private final int start;
+    private final int end;
     private final String keyword;
 
-    public Emit(final int position, final String keyword) {
-        this.position = position;
+    public Emit(final int start, final int end, final String keyword) {
+        this.start = start;
+        this.end = end;
         this.keyword = keyword;
     }
 
-    public int getPosition() {
-        return this.position;
+    public int getStart() {
+        return this.start;
+    }
+
+    public int getEnd() {
+        return this.end;
     }
 
     public String getKeyword() {

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

@@ -92,7 +92,7 @@ public class Trie {
         Collection<String> emits = currentState.emit();
         if (emits != null && !emits.isEmpty()) {
             for (String emit : emits) {
-                collectedEmits.add(new Emit(position, emit));
+                collectedEmits.add(new Emit(position-emit.length()+1, position, emit));
             }
         }
     }

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

@@ -15,7 +15,7 @@ public class TrieTest {
         trie.addKeyword("abc");
         Collection<Emit> emits = trie.parseText("abc");
         Iterator<Emit> iterator = emits.iterator();
-        checkEmit(iterator.next(), 2, "abc");
+        checkEmit(iterator.next(), 0, 2, "abc");
     }
 
     @Test
@@ -24,7 +24,7 @@ public class TrieTest {
         trie.addKeyword("abc");
         Collection<Emit> emits = trie.parseText(" abc");
         Iterator<Emit> iterator = emits.iterator();
-        checkEmit(iterator.next(), 3, "abc");
+        checkEmit(iterator.next(), 1, 3, "abc");
     }
 
     @Test
@@ -35,7 +35,7 @@ public class TrieTest {
         trie.addKeyword("cde");
         Collection<Emit> emits = trie.parseText("bcd");
         Iterator<Emit> iterator = emits.iterator();
-        checkEmit(iterator.next(), 2, "bcd");
+        checkEmit(iterator.next(), 0, 2, "bcd");
     }
 
     @Test
@@ -48,9 +48,9 @@ public class TrieTest {
         Collection<Emit> emits = trie.parseText("ushers");
         assertEquals(3, emits.size()); // she @ 3, he @ 3, hers @ 5
         Iterator<Emit> iterator = emits.iterator();
-        checkEmit(iterator.next(), 3, "she");
-        checkEmit(iterator.next(), 3, "he");
-        checkEmit(iterator.next(), 5, "hers");
+        checkEmit(iterator.next(), 1, 3, "she");
+        checkEmit(iterator.next(), 2, 3, "he");
+        checkEmit(iterator.next(), 2, 5, "hers");
     }
 
     @Test
@@ -59,7 +59,7 @@ public class TrieTest {
         trie.addKeyword("hers");
         Collection<Emit> emits = trie.parseText("h he her hers");
         Iterator<Emit> iterator = emits.iterator();
-        checkEmit(iterator.next(), 12, "hers");
+        checkEmit(iterator.next(), 9, 12, "hers");
     }
 
     @Test
@@ -71,14 +71,15 @@ public class TrieTest {
         trie.addKeyword("tomatoes");
         Collection<Emit> emits = trie.parseText("2 cauliflowers, 3 tomatoes, 4 slices of veal, 100g broccoli");
         Iterator<Emit> iterator = emits.iterator();
-        checkEmit(iterator.next(), 12, "cauliflower");
-        checkEmit(iterator.next(), 25, "tomatoes");
-        checkEmit(iterator.next(), 43, "veal");
-        checkEmit(iterator.next(), 58, "broccoli");
+        checkEmit(iterator.next(), 2, 12, "cauliflower");
+        checkEmit(iterator.next(), 18, 25, "tomatoes");
+        checkEmit(iterator.next(), 40, 43, "veal");
+        checkEmit(iterator.next(), 51, 58, "broccoli");
     }
 
-    private void checkEmit(Emit next, int expectedPosition, String expectedKeyword) {
-        assertEquals(expectedPosition, next.getPosition());
+    private void checkEmit(Emit next, int expectedStart, int expectedEnd, String expectedKeyword) {
+        assertEquals(expectedStart, next.getStart());
+        assertEquals(expectedEnd, next.getEnd());
         assertEquals(expectedKeyword, next.getKeyword());
     }