Fixed a few static analysis violations

Fixed mostly not closing resources (InputStream, ResultSet) and catching
Throwable instead of Exception in some modules.

Issue-ID: SDC-291
Change-Id: I34e331cc3b45c4bb3a71c301f50e1706a7b623fd
Signed-off-by: vempo <vitaliy.emporopulo@amdocs.com>

6 files changed, 77 insertions, 68 deletions

diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-facade-lib/openecomp-facade-core/src/main/java/org/openecomp/core/factory/FactoriesConfigImpl.java b/openecomp-be/lib/openecomp-core-lib/openecomp-facade-lib/openecomp-facade-core/src/main/java/org/openecomp/core/factory/FactoriesConfigImpl.java
index 173f9b15b1..b9d03f4d1a 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-facade-lib/openecomp-facade-core/src/main/java/org/openecomp/core/factory/FactoriesConfigImpl.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-facade-lib/openecomp-facade-core/src/main/java/org/openecomp/core/factory/FactoriesConfigImpl.java
@@ -25,7 +25,9 @@ import org.openecomp.core.factory.api.FactoriesConfiguration;
 import org.openecomp.core.utilities.file.FileUtils;
 import org.openecomp.core.utilities.json.JsonUtil;
 
+import java.io.IOException;
 import java.io.InputStream;
+import java.net.URL;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -50,12 +52,16 @@ public final class FactoriesConfigImpl implements FactoriesConfiguration {
   }
 
   private void init() {
-    List<InputStream> factoryConfigIsList = FileUtils.getFileInputStreams(FACTORY_CONFIG_FILE_NAME);
-    for (InputStream factoryConfigIs : factoryConfigIsList) {
-      factoryMap.putAll(JsonUtil.json2Object(factoryConfigIs, Map.class));
-    }
-  }
 
+    List<URL> factoryConfigUrlList = FileUtils.getAllLocations(FACTORY_CONFIG_FILE_NAME);
+    for (URL factoryConfigUrl : factoryConfigUrlList) {
 
+      try (InputStream stream = factoryConfigUrl.openStream()) {
+        factoryMap.putAll(JsonUtil.json2Object(stream, Map.class));
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+    }
+  }
 }
 
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-api/src/main/java/org/openecomp/core/util/UniqueValueUtil.java b/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-api/src/main/java/org/openecomp/core/util/UniqueValueUtil.java
index d2dee5e512..dce34a1c96 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-api/src/main/java/org/openecomp/core/util/UniqueValueUtil.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-api/src/main/java/org/openecomp/core/util/UniqueValueUtil.java
@@ -27,7 +27,6 @@ import org.openecomp.core.utilities.CommonMethods;
 import org.openecomp.sdc.common.errors.CoreException;
 import org.openecomp.sdc.common.errors.ErrorCategory;
 import org.openecomp.sdc.common.errors.ErrorCode;
-import org.openecomp.sdc.common.utils.CommonUtil;
 import org.openecomp.sdc.logging.context.impl.MdcDataDebugMessage;
 
 import java.util.Optional;
@@ -95,9 +94,10 @@ public class UniqueValueUtil {
 
     mdcDataDebugMessage.debugEntryMessage(null, null);
 
-    if ((newValue != null && oldValue != null
-        && !newValue.toLowerCase().equals(oldValue.toLowerCase()))
-        || newValue == null || oldValue == null) {
+    boolean nonEqual = (newValue != null) && (oldValue != null)
+            && !newValue.toLowerCase().equals(oldValue.toLowerCase());
+
+    if (nonEqual || newValue == null || oldValue == null) {
       createUniqueValue(type, CommonMethods.concat(uniqueContext, new String[]{newValue}));
       deleteUniqueValue(type, CommonMethods.concat(uniqueContext, new String[]{oldValue}));
     }
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-core/src/main/java/org/openecomp/core/nosqldb/util/CassandraUtils.java b/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-core/src/main/java/org/openecomp/core/nosqldb/util/CassandraUtils.java
index 2a88d0e521..7a70900873 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-core/src/main/java/org/openecomp/core/nosqldb/util/CassandraUtils.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-nosqldb-lib/openecomp-nosqldb-core/src/main/java/org/openecomp/core/nosqldb/util/CassandraUtils.java
@@ -23,7 +23,6 @@ package org.openecomp.core.nosqldb.util;
 import org.openecomp.core.utilities.file.FileUtils;
 import org.openecomp.core.utilities.json.JsonUtil;
 
-import java.io.InputStream;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -49,10 +48,12 @@ public class CassandraUtils {
    * @return the statement
    */
   public static String getStatement(String statementName) {
+
     if (statementMap.size() == 0) {
-      InputStream statementJson = FileUtils.getFileInputStream(CASSANDRA_STATEMENT_DEFINITION_FILE);
-      statementMap = JsonUtil.json2Object(statementJson, Map.class);
+        statementMap = FileUtils.readViaInputStream(CASSANDRA_STATEMENT_DEFINITION_FILE,
+                stream -> JsonUtil.json2Object(stream, Map.class));
     }
+
     return statementMap.get(statementName);
   }
 
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 87ce8d37c3..e04f02cce5 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
@@ -28,9 +28,12 @@ import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
-import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Enumeration;
+import java.util.LinkedList;
 import java.util.List;
+import java.util.Objects;
+import java.util.function.Function;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
@@ -40,38 +43,29 @@ import java.util.zip.ZipInputStream;
 public class FileUtils {
 
   /**
-   * Gets file input stream.
+   * Allows to consume an input stream open against a resource with a given file name.
    *
    * @param fileName the file name
-   * @return the file input stream
+   * @param function logic to be applied to the input stream
    */
-  public static InputStream getFileInputStream(String fileName) {
-    URL urlFile = FileUtils.class.getClassLoader().getResource(fileName);
-    InputStream is;
-    try {
-      assert urlFile != null;
-      is = urlFile.openStream();
-    } catch (IOException exception) {
-      throw new RuntimeException(exception);
-    }
-    return is;
+  public static <T> T readViaInputStream(String fileName, Function<InputStream, T> function) {
+    return readViaInputStream(FileUtils.class.getClassLoader().getResource(fileName), function);
   }
 
   /**
-   * Gets file input stream.
+   * Allows to consume an input stream open against a resource with a given URL.
    *
    * @param urlFile the url file
-   * @return the file input stream
+   * @param function logic to be applied to the input stream
    */
-  public static InputStream getFileInputStream(URL urlFile) {
-    InputStream is;
-    try {
-      assert urlFile != null;
-      is = urlFile.openStream();
+  public static <T> T readViaInputStream(URL urlFile, Function<InputStream, T> function) {
+
+    Objects.requireNonNull(urlFile);
+    try (InputStream is = urlFile.openStream()) {
+      return function.apply(is);
     } catch (IOException exception) {
       throw new RuntimeException(exception);
     }
-    return is;
   }
 
   /**
@@ -80,24 +74,23 @@ public class FileUtils {
    * @param fileName the file name
    * @return the file input streams
    */
-  public static List<InputStream> getFileInputStreams(String fileName) {
+  public static List<URL> getAllLocations(String fileName) {
+
+    List<URL> urls = new LinkedList<>();
     Enumeration<URL> urlFiles;
-    List<InputStream> streams = new ArrayList<>();
-    InputStream is;
-    URL url;
+
     try {
       urlFiles = FileUtils.class.getClassLoader().getResources(fileName);
       while (urlFiles.hasMoreElements()) {
-        url = urlFiles.nextElement();
-        is = url.openStream();
-        streams.add(is);
+        urls.add(urlFiles.nextElement());
       }
 
 
     } catch (IOException exception) {
       throw new RuntimeException(exception);
     }
-    return streams;
+
+    return urls.isEmpty() ? Collections.emptyList() : Collections.unmodifiableList(urls);
   }
 
   /**
@@ -210,25 +203,22 @@ public class FileUtils {
    * @throws IOException the io exception
    */
   public static FileContentHandler getFileContentMapFromZip(byte[] zipData) throws IOException {
-    ZipEntry zipEntry;
-    FileContentHandler mapFileContent = new FileContentHandler();
-    try {
-      ZipInputStream inputZipStream;
 
-      byte[] fileByteContent;
-      String currentEntryName;
-      inputZipStream = new ZipInputStream(new ByteArrayInputStream(zipData));
+    try (ZipInputStream inputZipStream = new ZipInputStream(new ByteArrayInputStream(zipData))) {
+
+      FileContentHandler mapFileContent = new FileContentHandler();
+
+      ZipEntry zipEntry;
 
       while ((zipEntry = inputZipStream.getNextEntry()) != null) {
-        currentEntryName = zipEntry.getName();
-        fileByteContent = FileUtils.toByteArray(inputZipStream);
-        mapFileContent.addFile(currentEntryName, fileByteContent);
+        mapFileContent.addFile(zipEntry.getName(), FileUtils.toByteArray(inputZipStream));
       }
 
+      return mapFileContent;
+
     } catch (RuntimeException exception) {
       throw new IOException(exception);
     }
-    return mapFileContent;
   }
 
 
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonSchemaDataGeneratorTest.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonSchemaDataGeneratorTest.java
index ba34d07034..9b21f632cc 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonSchemaDataGeneratorTest.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonSchemaDataGeneratorTest.java
@@ -28,14 +28,17 @@ import org.testng.annotations.Test;
 
 public class JsonSchemaDataGeneratorTest {
 
-  public static final String SCHEMA_WITHOUT_DEFAULTS = new String(
-      FileUtils.toByteArray(FileUtils.getFileInputStream("jsonUtil/json_schema/aSchema.json")));
-  public static final String SCHEMA_WITH_REFS_AND_DEFAULTS = new String(FileUtils.toByteArray(
-      FileUtils.getFileInputStream("jsonUtil/json_schema/schemaWithRefsAndDefaults.json")));
-  public static final String SCHEMA_WITH_INVALID_DEFAULT = new String(FileUtils.toByteArray(
-      FileUtils.getFileInputStream("jsonUtil/json_schema/schemaWithInvalidDefault.json")));
-  public static final String SCHEMA_NIC = new String(
-      FileUtils.toByteArray(FileUtils.getFileInputStream("jsonUtil/json_schema/nicSchema.json")));
+  public static final String SCHEMA_WITHOUT_DEFAULTS =
+          readFromFile("jsonUtil/json_schema/aSchema.json");
+
+  public static final String SCHEMA_WITH_REFS_AND_DEFAULTS =
+          readFromFile("jsonUtil/json_schema/schemaWithRefsAndDefaults.json");
+
+  public static final String SCHEMA_WITH_INVALID_DEFAULT =
+          readFromFile("jsonUtil/json_schema/schemaWithInvalidDefault.json");
+
+  public static final String SCHEMA_NIC =
+          readFromFile("jsonUtil/json_schema/nicSchema.json");
 
   @Test
   public void testSchemaWithoutDefaults() {
@@ -67,4 +70,8 @@ public class JsonSchemaDataGeneratorTest {
     JSONObject dataJson = new JSONObject(data);
     Assert.assertTrue(expectedData.similar(dataJson));
   }
+
+  private static String readFromFile(String filename) {
+    return FileUtils.readViaInputStream(filename, stream -> new String(FileUtils.toByteArray(stream)));
+  }
 }
diff --git a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonUtilTest.java b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonUtilTest.java
index 6b8805797a..d89019baec 100644
--- a/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonUtilTest.java
+++ b/openecomp-be/lib/openecomp-core-lib/openecomp-utilities-lib/src/test/java/org/openecomp/core/utilities/json/JsonUtilTest.java
@@ -31,10 +31,14 @@ public class JsonUtilTest {
 
   @Test
   public void testValidJsonValidate() throws Exception {
-    String json =
-        new String(FileUtils.toByteArray(FileUtils.getFileInputStream("jsonUtil/json/a.json")));
-    String jsonSchema = new String(
-        FileUtils.toByteArray(FileUtils.getFileInputStream("jsonUtil/json_schema/aSchema.json")));
+
+
+
+    String json = FileUtils.readViaInputStream("jsonUtil/json/a.json",
+            stream -> new String(FileUtils.toByteArray(stream)));
+
+    String jsonSchema = FileUtils.readViaInputStream("jsonUtil/json_schema/aSchema.json",
+            stream -> new String(FileUtils.toByteArray(stream)));
 
     List<String> validationErrors = JsonUtil.validate(json, jsonSchema);
     Assert.assertNull(validationErrors);
@@ -42,10 +46,11 @@ public class JsonUtilTest {
 
   @Test
   public void testInValidJsonValidate() throws Exception {
-    String json = new String(
-        FileUtils.toByteArray(FileUtils.getFileInputStream("jsonUtil/json/a_invalid.json")));
-    String jsonSchema = new String(
-        FileUtils.toByteArray(FileUtils.getFileInputStream("jsonUtil/json_schema/aSchema.json")));
+
+    String json = FileUtils.readViaInputStream("jsonUtil/json/a_invalid.json",
+            stream -> new String(FileUtils.toByteArray(stream)));
+    String jsonSchema = FileUtils.readViaInputStream("jsonUtil/json_schema/aSchema.json",
+            stream -> new String(FileUtils.toByteArray(stream)));
 
     List<String> validationErrors = JsonUtil.validate(json, jsonSchema);
     Assert.assertNotNull(validationErrors);