Drop static from interfaces

It's redundant.

examples/java/src/main/java/org/apache/beam/examples/DebuggingWordCount.java

@@ -158,7 +158,7 @@ public void processElement(ProcessContext c) {
  * <p>Inherits standard configuration options and all options defined in
  * {@link WordCount.WordCountOptions}.
  */
- public static interface WordCountOptions extends WordCount.WordCountOptions {
+ public interface WordCountOptions extends WordCount.WordCountOptions {
 
  @Description("Regex filter pattern to use in DebuggingWordCount. "
  + "Only words matching this pattern will be counted.")

examples/java/src/main/java/org/apache/beam/examples/WindowedWordCount.java

@@ -166,7 +166,7 @@ private static TableReference getTableReference(Options options) {
  * table, as well as the {@link WordCount.WordCountOptions} support for
  * specification of the input file.
  */
- public static interface Options extends WordCount.WordCountOptions,
+ public interface Options extends WordCount.WordCountOptions,
  ExampleOptions, ExampleBigQueryTableOptions {
  @Description("Fixed window duration, in minutes")
  @Default.Integer(WINDOW_SIZE)

examples/java/src/main/java/org/apache/beam/examples/WordCount.java

@@ -152,7 +152,7 @@ public PCollection<KV<String, Long>> apply(PCollection<String> lines) {
  *
  * <p>Inherits standard configuration options.
  */
- public static interface WordCountOptions extends PipelineOptions {
+ public interface WordCountOptions extends PipelineOptions {
  @Description("Path of the file to read from")
  @Default.String("gs:https://apache-beam-samples/shakespeare/kinglear.txt")
  String getInputFile();

examples/java/src/main/java/org/apache/beam/examples/complete/AutoComplete.java

@@ -412,7 +412,7 @@ public void processElement(ProcessContext c) {
  *
  * <p>Inherits standard Beam example configuration options.
  */
- private static interface Options
+ private interface Options
  extends ExampleOptions, ExampleBigQueryTableOptions, StreamingOptions {
  @Description("Input text file")
  @Validation.Required

examples/java/src/main/java/org/apache/beam/examples/complete/TfIdf.java

@@ -86,7 +86,7 @@ public class TfIdf {
  *
  * <p>Inherits standard configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description("Path to the directory or GCS prefix containing files to read from")
  @Default.String("gs:https://apache-beam-samples/shakespeare/")
  String getInput();

examples/java/src/main/java/org/apache/beam/examples/complete/TopWikipediaSessions.java

@@ -180,7 +180,7 @@ public void processElement(ProcessContext c) {
  *
  * <p>Inherits standard Beam configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description(
  "Input specified as a GCS path containing a BigQuery table exported as json")
  @Default.String(EXPORTED_WIKI_TABLE)

examples/java/src/main/java/org/apache/beam/examples/cookbook/BigQueryTornadoes.java

@@ -131,7 +131,7 @@ public PCollection<TableRow> apply(PCollection<TableRow> rows) {
  *
  * <p>Inherits standard configuration options.
  */
- static interface Options extends PipelineOptions {
+ interface Options extends PipelineOptions {
  @Description("Table to read from, specified as "
  + "<project_id>:<dataset_id>.<table_id>")
  @Default.String(WEATHER_SAMPLES_TABLE)

examples/java/src/main/java/org/apache/beam/examples/cookbook/CombinePerKeyExamples.java

@@ -173,7 +173,7 @@ public String apply(Iterable<String> input) {
  *
  * <p>Inherits standard configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description("Table to read from, specified as "
  + "<project_id>:<dataset_id>.<table_id>")
  @Default.String(SHAKESPEARE_TABLE)

examples/java/src/main/java/org/apache/beam/examples/cookbook/DeDupExample.java

@@ -55,7 +55,7 @@ public class DeDupExample {
  *
  * <p>Inherits standard configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description("Path to the directory or GCS prefix containing files to read from")
  @Default.String("gs:https://apache-beam-samples/shakespeare/*")
  String getInput();

examples/java/src/main/java/org/apache/beam/examples/cookbook/FilterExamples.java

@@ -197,7 +197,7 @@ public void processElement(ProcessContext c) {
  *
  * <p>Inherits standard configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description("Table to read from, specified as "
  + "<project_id>:<dataset_id>.<table_id>")
  @Default.String(WEATHER_SAMPLES_TABLE)

examples/java/src/main/java/org/apache/beam/examples/cookbook/JoinExamples.java

@@ -154,7 +154,7 @@ public void processElement(ProcessContext c) {
  *
  * <p>Inherits standard configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description("Path of the file to write to")
  @Validation.Required
  String getOutput();

examples/java/src/main/java/org/apache/beam/examples/cookbook/MaxPerKeyExamples.java

@@ -123,7 +123,7 @@ public PCollection<TableRow> apply(PCollection<TableRow> rows) {
  *
  * <p>Inherits standard configuration options.
  */
- private static interface Options extends PipelineOptions {
+ private interface Options extends PipelineOptions {
  @Description("Table to read from, specified as "
  + "<project_id>:<dataset_id>.<table_id>")
  @Default.String(WEATHER_SAMPLES_TABLE)

examples/java8/src/main/java/org/apache/beam/examples/complete/game/GameStats.java

@@ -161,7 +161,7 @@ public void processElement(ProcessContext c, BoundedWindow window) {
  /**
  * Options supported by {@link GameStats}.
  */
- static interface Options extends LeaderBoard.Options {
+ interface Options extends LeaderBoard.Options {
  @Description("Numeric value of fixed window duration for user analysis, in minutes")
  @Default.Integer(60)
  Integer getFixedWindowDuration();

examples/java8/src/main/java/org/apache/beam/examples/complete/game/HourlyTeamScore.java

@@ -86,7 +86,7 @@ public class HourlyTeamScore extends UserScore {
  /**
  * Options supported by {@link HourlyTeamScore}.
  */
- static interface Options extends UserScore.Options {
+ interface Options extends UserScore.Options {
 
  @Description("Numeric value of fixed window duration, in minutes")
  @Default.Integer(60)

examples/java8/src/main/java/org/apache/beam/examples/complete/game/LeaderBoard.java

@@ -103,7 +103,7 @@ public class LeaderBoard extends HourlyTeamScore {
  /**
  * Options supported by {@link LeaderBoard}.
  */
- static interface Options extends HourlyTeamScore.Options, ExampleOptions, StreamingOptions {
+ interface Options extends HourlyTeamScore.Options, ExampleOptions, StreamingOptions {
 
  @Description("Pub/Sub topic to read from")
  @Validation.Required

examples/java8/src/main/java/org/apache/beam/examples/complete/game/UserScore.java

@@ -177,7 +177,7 @@ public PCollection<KV<String, Integer>> apply(
  /**
  * Options supported by {@link UserScore}.
  */
- public static interface Options extends PipelineOptions {
+ public interface Options extends PipelineOptions {
 
  @Description("Path to the data file(s) containing game data.")
  // The default maps to two large Google Cloud Storage files (each ~12GB) holding two subsequent

runners/direct-java/src/main/java/org/apache/beam/runners/direct/DirectRunner.java

@@ -180,7 +180,7 @@ interface CommittedBundle<T> {
  * @param <ElemT> the type of elements the input {@link PCollection} contains.
  * @param <ViewT> the type of the PCollectionView this writer writes to.
  */
- public static interface PCollectionViewWriter<ElemT, ViewT> {
+ public interface PCollectionViewWriter<ElemT, ViewT> {
  void add(Iterable<WindowedValue<ElemT>> values);
  }
 

runners/direct-java/src/main/java/org/apache/beam/runners/direct/WatermarkManager.java

@@ -131,7 +131,7 @@ public class WatermarkManager {
  * timestamp which indicates we have received all of the data and there will be no more on-time or
  * late data. This value is represented by {@link WatermarkManager#THE_END_OF_TIME}.
  */
- private static interface Watermark {
+ private interface Watermark {
  /**
  * Returns the current value of this watermark.
  */

runners/spark/src/main/java/org/apache/beam/runners/spark/examples/WordCount.java

@@ -108,7 +108,7 @@ public PCollection<KV<String, Long>> apply(PCollection<String> lines) {
  *
  * <p>Inherits standard configuration options.
  */
- public static interface WordCountOptions extends PipelineOptions {
+ public interface WordCountOptions extends PipelineOptions {
  @Description("Path of the file to read from")
  @Default.String("gs:https://beam-samples/shakespeare/kinglear.txt")
  String getInputFile();

sdks/java/core/src/main/java/org/apache/beam/sdk/coders/DelegateCoder.java

@@ -48,7 +48,7 @@ public final class DelegateCoder<T, IntermediateT> extends CustomCoder<T> {
  * A {@link DelegateCoder.CodingFunction CodingFunction&lt;InputT, OutputT&gt;} is a serializable
  * function from {@code InputT} to {@code OutputT} that may throw any {@link Exception}.
  */
- public static interface CodingFunction<InputT, OutputT> extends Serializable {
+ public interface CodingFunction<InputT, OutputT> extends Serializable {
  public abstract OutputT apply(InputT input) throws Exception;
  }
 

sdks/java/core/src/main/java/org/apache/beam/sdk/io/CompressedSource.java

@@ -71,7 +71,7 @@ public class CompressedSource<T> extends FileBasedSource<T> {
  /**
  * Factory interface for creating channels that decompress the content of an underlying channel.
  */
- public static interface DecompressingChannelFactory extends Serializable {
+ public interface DecompressingChannelFactory extends Serializable {
  /**
  * Given a channel, create a channel that decompresses the content read from the channel.
  * @throws IOException
@@ -84,7 +84,7 @@ public ReadableByteChannel createDecompressingChannel(ReadableByteChannel channe
  * Factory interface for creating channels that decompress the content of an underlying channel,
  * based on both the channel and the file name.
  */
- private static interface FileNameBasedDecompressingChannelFactory
+ private interface FileNameBasedDecompressingChannelFactory
  extends DecompressingChannelFactory {
  /**
  * Given a channel, create a channel that decompresses the content read from the channel.

sdks/java/core/src/main/java/org/apache/beam/sdk/io/FileBasedSink.java

@@ -680,7 +680,7 @@ public static FileOperations getFileOperations(String spec, PipelineOptions opti
  * copy-if-existing and do not throw exceptions on file not found to enable retries of these
  * operations in the case of transient error.
  */
- private static interface FileOperations {
+ private interface FileOperations {
  /**
  * Copy a collection of files from one location to another.
  *

sdks/java/core/src/main/java/org/apache/beam/sdk/testing/PAssert.java

@@ -1181,7 +1181,7 @@ public Void apply(Iterable<T> actual) {
  * {@code assertFor(Expected)} which returns a {@code SerializableFunction<Actual, Void>} that
  * should verify the assertion..
  */
- private static interface AssertRelation<ActualT, ExpectedT> extends Serializable {
+ private interface AssertRelation<ActualT, ExpectedT> extends Serializable {
  public SerializableFunction<ActualT, Void> assertFor(ExpectedT input);
  }
 

sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Combine.java

@@ -1026,7 +1026,7 @@ public abstract static class AccumulatingCombineFn<
  * The type of mutable accumulator values used by this
  * {@code AccumulatingCombineFn}.
  */
- public abstract static interface Accumulator<InputT, AccumT, OutputT> {
+ public abstract interface Accumulator<InputT, AccumT, OutputT> {
  /**
  * Adds the given input value to this accumulator, modifying
  * this accumulator.

sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/reflect/DoFnSignatures.java

@@ -704,7 +704,7 @@ private static Collection<Field> declaredFieldsWithAnnotation(
  return declaredMembersWithAnnotation(anno, startClass, stopClass, GET_FIELDS);
  }
 
- private static interface MemberGetter<MemberT> {
+ private interface MemberGetter<MemberT> {
  public MemberT[] getMembers(Class<?> clazz);
  }
 

sdks/java/core/src/main/java/org/apache/beam/sdk/util/state/CopyOnAccessInMemoryStateInternals.java

@@ -231,7 +231,7 @@ protected StateBinder<K> binderForNamespace(final StateNamespace namespace, Stat
  return binderFactory.forNamespace(namespace, c);
  }
 
- private static interface StateBinderFactory<K> {
+ private interface StateBinderFactory<K> {
  StateBinder<K> forNamespace(StateNamespace namespace, StateContext<?> c);
  }