diff --git a/src/main/java/cokr/xit/base/file/FileInfo.java b/src/main/java/cokr/xit/base/file/FileInfo.java
index 7ecf2bd..4cbbc01 100644
--- a/src/main/java/cokr/xit/base/file/FileInfo.java
+++ b/src/main/java/cokr/xit/base/file/FileInfo.java
@@ -16,7 +16,6 @@ import java.util.stream.Stream;
 
 import cokr.xit.foundation.AbstractComponent;
 import cokr.xit.foundation.AbstractEntity;
-import cokr.xit.foundation.Assert;
 
 /**파일 정보
  * @author mjkhan
@@ -35,11 +34,11 @@ public class FileInfo extends AbstractEntity {
 		 * @return infoKey
 		 */
 		public static String InfoKey(Object... objs) {
-			if (Assert.isEmpty(objs))
+			if (isEmpty(objs))
 				return "";
 
 			return Stream.of(objs)
-				.filter(obj -> !Assert.isEmpty(obj))
+				.filter(obj -> !isEmpty(obj))
 				.map(obj -> obj.toString())
 				.collect(Collectors.joining("-"));
 		}
@@ -96,9 +95,9 @@ public class FileInfo extends AbstractEntity {
 		 * @param fileInfo FileInfo
 		 */
 		public void setInfo(FileInfo fileInfo) {
-			fileInfo.setInfoType(Assert.notEmpty(infoType, "infoType"));
-			fileInfo.setInfoKey(Assert.notEmpty(infoKey, "infoKey"));
-			if (!Assert.isEmpty(subType))
+			fileInfo.setInfoType(notEmpty(infoType, "infoType"));
+			fileInfo.setInfoKey(notEmpty(infoKey, "infoKey"));
+			if (!isEmpty(subType))
 				fileInfo.setSubType(subType);
 		}
 	}
@@ -128,7 +127,7 @@ public class FileInfo extends AbstractEntity {
 		 * @param data 파일 데이터
 		 */
 		public DataHolder(Relation relation, String filename, String data) {
-			this(relation, filename, !Assert.isEmpty(data) ? Base64.getDecoder().decode(data.getBytes()) : null);
+			this(relation, filename, !FileInfo.isEmpty(data) ? Base64.getDecoder().decode(data.getBytes()) : null);
 		}
 
 		/**관계 정보를 반환한다.
@@ -447,7 +446,7 @@ public class FileInfo extends AbstractEntity {
 	 * @return mime type
 	 */
 	public String getMimeType() {
-		return Assert.ifEmpty(mimeType, () -> mimeType = "application/octet-stream");
+		return ifEmpty(mimeType, () -> mimeType = "application/octet-stream");
 	}
 
 	/**mime type을 설정한다.
@@ -461,7 +460,7 @@ public class FileInfo extends AbstractEntity {
 	 * @return 확장자
 	 */
 	public String getExtension() {
-		return Assert.ifEmpty(extension, () -> extension = extension(name));
+		return ifEmpty(extension, () -> extension = extension(name));
 	}
 
 	/**확장자를 설정한다.
@@ -535,12 +534,12 @@ public class FileInfo extends AbstractEntity {
 	public InputStream getInputStream() {
 		if (input != null) return input;
 
-		if (Assert.isEmpty(path)) return null;
+		if (isEmpty(path)) return null;
 
 		try {
 			return new FileInputStream(path);
 		} catch (Exception e) {
-			throw Assert.runtimeException(e);
+			throw runtimeException(e);
 		}
 	}
 
@@ -569,7 +568,7 @@ public class FileInfo extends AbstractEntity {
 			in.transferTo(out);
 			return true;
 		} catch (Exception e) {
-			throw Assert.runtimeException(e);
+			throw runtimeException(e);
 		}
 	}
 
@@ -583,7 +582,7 @@ public class FileInfo extends AbstractEntity {
 		try (FileOutputStream out = new FileOutputStream(path)) {
 			return write(out);
 		} catch(Exception e) {
-			throw Assert.runtimeException(e);
+			throw runtimeException(e);
 		}
 	}
 
@@ -594,7 +593,7 @@ public class FileInfo extends AbstractEntity {
 	 * </ul>
 	 */
 	public boolean delete() {
-		if (Assert.isEmpty(path)) return false;
+		if (isEmpty(path)) return false;
 
 		File file = new File(path);
 		return file.exists() ? file.delete() : false;
@@ -610,13 +609,13 @@ public class FileInfo extends AbstractEntity {
 			input = null;
 			return this;
 		} catch (Exception e) {
-			throw Assert.runtimeException(e);
+			throw runtimeException(e);
 		}
 	}
 
 	@Override
 	public String toString() {
 		String path = getPath();
-		return getName() + (Assert.isEmpty(path) ? "" : " -> " + path);
+		return getName() + (isEmpty(path) ? "" : " -> " + path);
 	}
 }
\ No newline at end of file