Merge pull request #45 from wreulicke/feature/fix-compatible-commons

Implement collection

Author: dai0304

gradle/quality/spotless.gradle

@@ -14,6 +14,7 @@ spotless {
 		//    funcThatTakesLambdas(x -> {}, y -> {})	// what I wish Eclipse did
 		custom 'Lambda fix', { it.replace('} )', '})').replace('} ,', '},') }
 
+		removeUnusedImports()
 		indentWithTabs()
 		endWithNewline()
 

spar-wings-spring-data-chunk/src/main/java/jp/xet/sparwings/spring/data/chunk/Chunk.java

@@ -15,6 +15,7 @@
  */
 package jp.xet.sparwings.spring.data.chunk;
 
+import java.util.Collection;
 import java.util.List;
 import java.util.stream.Stream;
 
@@ -28,7 +29,7 @@
  * @since 0.11
  * @author daisuke
  */
-public interface Chunk<T>extends Iterable<T> {
+public interface Chunk<T>extends Collection<T> {
 
 	/**
 	 * Returns the chunk content as {@link List}.

spar-wings-spring-data-chunk/src/main/java/jp/xet/sparwings/spring/data/chunk/ChunkImpl.java

@@ -16,6 +16,7 @@
 package jp.xet.sparwings.spring.data.chunk;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
@@ -176,6 +177,66 @@ protected <S> List<S> getConvertedContent(Converter<? super T, ? extends S> conv
 		return content.stream().map(converter::convert).collect(Collectors.toList());
 	}
 
+	@Override
+	public int size() {
+		return content.size();
+	}
+	
+	@Override
+	public boolean isEmpty() {
+		return content.isEmpty();
+	}
+	
+	@Override
+	public boolean contains(Object o) {
+		return content.contains(o);
+	}
+	
+	@Override
+	public Object[] toArray() {
+		return content.toArray();
+	}
+	
+	@Override
+	public <T1> T1[] toArray(T1[] a) {
+		return content.toArray(a);
+	}
+	
+	@Override
+	public boolean add(T t) {
+		return content.add(t);
+	}
+	
+	@Override
+	public boolean remove(Object o) {
+		return content.remove(o);
+	}
+	
+	@Override
+	public boolean containsAll(Collection<?> c) {
+		return content.containsAll(c);
+	}
+	
+	@Override
+	public boolean addAll(Collection<? extends T> c) {
+		return content.addAll(c);
+	}
+	
+	@Override
+	public boolean removeAll(Collection<?> c) {
+		return content.removeAll(c);
+	}
+	
+	@Override
+	public boolean retainAll(Collection<?> c) {
+		return c.retainAll(c);
+	}
+	
+	@Override
+	public void clear() {
+		content.clear();
+	}
+	
 	@Override
 	public String toString() {
 		String contentType = "UNKNOWN";