Replace FileUtils.toByteArray() with IOUtils

The in-house implementation of FileUtils.toByteArray()
appears to be a literal copy-and-paste of IOUtils.toByteArray().
This change replaces the in-house implementation with a call
to IOUtils.

Change-Id: Ib33b64c4c0050acb0787915dd9df190e284b8cda
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>

2 files changed, 11 insertions, 39 deletions

diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/pom.xml b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/pom.xml
index 76d6ff6b74..490bcf742a 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/pom.xml
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/pom.xml
@@ -23,6 +23,12 @@
             <artifactId>snakeyaml</artifactId>
             <version>${snakeyaml.version}</version>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons.io.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/file/FileUtils.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/file/FileUtils.java
index 08d9bd8a41..87ce8d37c3 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/file/FileUtils.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/main/java/org/openecomp/core/utilities/file/FileUtils.java
@@ -20,14 +20,13 @@
 
 package org.openecomp.core.utilities.file;
 
+import org.apache.commons.io.IOUtils;
 import org.openecomp.core.utilities.json.JsonUtil;
 import org.openecomp.sdc.tosca.services.YamlUtil;
 
 import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.OutputStream;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Enumeration;
@@ -179,48 +178,15 @@ public class FileUtils {
    * @return the byte [ ]
    */
   public static byte[] toByteArray(InputStream input) {
-    ByteArrayOutputStream output = new ByteArrayOutputStream();
+    if (input == null) {
+      return new byte[0];
+    }
     try {
-      copy(input, output);
+      return IOUtils.toByteArray(input);
     } catch (IOException exception) {
       throw new RuntimeException(
           "error will convertion input stream to byte array:" + exception.getMessage());
     }
-    return output.toByteArray();
-  }
-
-  /**
-   * Copy int.
-   *
-   * @param input  the input
-   * @param output the output
-   * @return the int
-   * @throws IOException the io exception
-   */
-  public static int copy(InputStream input, OutputStream output) throws IOException {
-    long count = copyLarge(input, output);
-    return count > 2147483647L ? -1 : (int) count;
-  }
-
-  private static long copyLarge(InputStream input, OutputStream output) throws IOException {
-    return copyLarge(input, output, new byte[4096]);
-  }
-
-  private static long copyLarge(InputStream input, OutputStream output, byte[] buffer)
-      throws IOException {
-    long count = 0L;
-
-    int n1;
-    if (input == null) {
-      return count;
-    }
-    for (; -1 != (n1 = input.read(buffer)); count += (long) n1) {
-      output.write(buffer, 0, n1);
-    }
-
-    return count;
-
-
   }
 
   /**