OPENNLP-1701: Re-generates Snowball Stemmer Code (#743)

opennlp-tools/src/main/java/opennlp/tools/stemmer/snowball/AbstractSnowballStemmer.java

@@ -32,6 +32,11 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 
 package opennlp.tools.stemmer.snowball;
 
+/**
+ * Parent class of all snowball stemmers, which must implement <code>stem</code>
+ */
 abstract class AbstractSnowballStemmer extends SnowballProgram {
   public abstract boolean stem();
+
+  static final long serialVersionUID = 2016072500L;
 }

opennlp-tools/src/main/java/opennlp/tools/stemmer/snowball/Among.java

@@ -30,17 +30,18 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 
  */
 
-// Generated by Snowball (build from 867c4ec70debd4daa7fb4d5a9f7759b47887d0b9)
+// Generated by Snowball (build from 9a22f0d3f44cda36677829328fe2642750114d57)
 package opennlp.tools.stemmer.snowball;
 
-import java.lang.reflect.Method;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.Locale;
 
+/**
+ * Internal class used by Snowball stemmers
+ */
 public class Among {
-  public final char[] s; /* search string */
-  public final int substring_i; /* index to longest matching substring */
-  public final int result; /* result of the lookup */
-  public final Method method; /* method to use if substring matches */
-
   public Among(String s, int substring_i, int result) {
     this.s = s.toCharArray();
     this.substring_i = substring_i;
@@ -49,14 +50,30 @@ public Among(String s, int substring_i, int result) {
   }
 
   public Among(String s, int substring_i, int result, String methodname,
-               Class<? extends AbstractSnowballStemmer> programclass) {
+               MethodHandles.Lookup methodobject) {
     this.s = s.toCharArray();
     this.substring_i = substring_i;
     this.result = result;
-    try {
-      this.method = programclass.getDeclaredMethod(methodname);
-    } catch (NoSuchMethodException e) {
-      throw new RuntimeException(e);
+    final Class<? extends SnowballProgram> clazz = methodobject.lookupClass().asSubclass(SnowballProgram.class);
+    if (methodname.length() > 0) {
+      try {
+        this.method = methodobject.findVirtual(clazz, methodname, MethodType.methodType(boolean.class))
+            .asType(MethodType.methodType(boolean.class, SnowballProgram.class));
+      } catch (NoSuchMethodException | IllegalAccessException e) {
+        throw new RuntimeException(String.format(Locale.ENGLISH,
+            "Snowball program '%s' is broken, cannot access method: boolean %s()",
+            clazz.getSimpleName(), methodname
+        ), e);
+      }
+    } else {
+      this.method = null;
     }
   }
-}
+
+  final char[] s; /* search string */
+  final int substring_i; /* index to longest matching substring */
+  final int result; /* result of the lookup */
+
+  // Make sure this is not accessible outside package for Java security reasons!
+  final MethodHandle method; /* method to use if substring matches */
+};