refactor: remove commons-collections dependency

core/pom.xml

@@ -156,10 +156,6 @@ THE SOFTWARE.
  <groupId>commons-codec</groupId>
  <artifactId>commons-codec</artifactId>
  </dependency>
- <dependency>
- <groupId>commons-collections</groupId>
- <artifactId>commons-collections</artifactId>
- </dependency>
  <dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>

core/src/main/java/hudson/util/LRUStringConverter.java

@@ -2,8 +2,8 @@
 
 import com.thoughtworks.xstream.converters.basic.AbstractSingleValueConverter;
 import java.util.Collections;
+import java.util.LinkedHashMap;
 import java.util.Map;
-import org.apache.commons.collections.map.LRUMap;
 
 public class LRUStringConverter extends AbstractSingleValueConverter {
 
@@ -18,7 +18,12 @@
  }
 
  public LRUStringConverter(int size) {
- cache = Collections.synchronizedMap(new LRUMap(size));
+ cache = Collections.synchronizedMap(new LinkedHashMap<>(size, 0.75f, true) {
+ @Override
+ protected boolean removeEldestEntry(Map.Entry<String, String> eldest) {
+ return size() > size;
+ }
+ });
  }
 
  @Override