Make some classes serializable

src/main/java/com/optimaize/langdetect/LanguageDetector.java

@@ -19,6 +19,7 @@
 import com.google.common.base.Optional;
 import com.optimaize.langdetect.i18n.LdLocale;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -34,7 +35,7 @@
  *
  * @author Fabian Kessler
  */
-public interface LanguageDetector {
+public interface LanguageDetector extends Serializable {
 
     /**
      * Returns the best detected language if the algorithm is very confident.

src/main/java/com/optimaize/langdetect/LanguageDetectorImpl.java

@@ -25,6 +25,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.Serializable;
 import java.util.*;
 
 /**

src/main/java/com/optimaize/langdetect/NgramFrequencyData.java

@@ -21,6 +21,7 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.Serializable;
 import java.util.*;
 
 /**
@@ -33,7 +34,7 @@
  *
  * @author Fabian Kessler
  */
-public final class NgramFrequencyData {
+public final class NgramFrequencyData implements Serializable {
 
     /**
      * Key   = ngram

src/main/java/com/optimaize/langdetect/i18n/LdLocale.java

@@ -20,6 +20,7 @@
 import com.google.common.base.Splitter;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -63,7 +64,7 @@
  *
  * @author fabian kessler
  */
-public final class LdLocale {
+public final class LdLocale implements Serializable {
 
     @NotNull
     private final String language;

src/main/java/com/optimaize/langdetect/ngram/NgramExtractor.java

@@ -20,6 +20,7 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.Serializable;
 import java.util.*;
 
 /**
@@ -29,7 +30,7 @@
  *
  * @author Fabian Kessler
  */
-public class NgramExtractor {
+public class NgramExtractor implements Serializable {
 
     @NotNull
     private final List<Integer> gramLengths;

src/main/java/com/optimaize/langdetect/ngram/NgramFilter.java

@@ -16,14 +16,16 @@
 
 package com.optimaize.langdetect.ngram;
 
+import java.io.Serializable;
+
 /**
  * Filters out some undesired n-grams.
  *
  * Implementations must be immutable.
  *
  * @author Fabian Kessler
  */
-public interface NgramFilter {
+public interface NgramFilter extends Serializable {
 
     boolean use(String ngram);
 

src/main/java/com/optimaize/langdetect/text/TextFilter.java

@@ -16,14 +16,16 @@
 
 package com.optimaize.langdetect.text;
 
+import java.io.Serializable;
+
 /**
  * Allows to filter content from a text to be ignored for the n-gram analysis.
  *
  * <p>Implementations must be immutable and stateless.</p>
  *
  * @author Fabian Kessler
  */
-public interface TextFilter {
+public interface TextFilter extends Serializable {
 
     String filter(CharSequence text);
 

src/main/java/com/optimaize/langdetect/text/TextObjectFactory.java

@@ -16,12 +16,14 @@
 
 package com.optimaize.langdetect.text;
 
+import java.io.Serializable;
+
 /**
  * Factory for {@link TextObject}s.
  *
  * @author Fabian Kessler
  */
-public class TextObjectFactory {
+public class TextObjectFactory implements Serializable {
 
     private final TextFilter textFilter;
     private final int maxTextLength;