Cleanup and Update authentication parsing to use switch-case logic

Author: MouhsinElmajdouby

ojdbc-provider-hashicorp/src/main/java/oracle/jdbc/provider/hashicorp/dedicated/authentication/DedicatedVaultAuthenticationMethod.java

@@ -51,5 +51,5 @@ public enum DedicatedVaultAuthenticationMethod {
    * environment variables, or system properties.
    * </p>
    */
-  TOKEN
+  VAULT_TOKEN
 }

ojdbc-provider-hashicorp/src/main/java/oracle/jdbc/provider/hashicorp/dedicated/authentication/DedicatedVaultCredentialsFactory.java

@@ -100,7 +100,7 @@ private static DedicatedVaultCredentials getCredential(ParameterSet parameterSet
             parameterSet.getRequired(AUTHENTICATION_METHOD);
 
     switch (method) {
-      case TOKEN:
+      case VAULT_TOKEN:
         return createTokenCredentials(parameterSet);
       default:
         throw new IllegalArgumentException(
@@ -117,15 +117,13 @@ private static DedicatedVaultCredentials getCredential(ParameterSet parameterSet
   private static DedicatedVaultCredentials createTokenCredentials(ParameterSet parameterSet) {
     String vaultToken = getRequiredOrFallback(
             parameterSet,
-            DedicatedVaultSecretsManagerFactory.VAULT_TOKEN,
-            "VAULT_TOKEN"
+            DedicatedVaultSecretsManagerFactory.VAULT_TOKEN, "VAULT_TOKEN"
     );
 
     if (vaultToken == null || vaultToken.isEmpty()) {
       throw new IllegalStateException("Vault Token not found in parameters, " +
               "system properties, or environment variables");
     }
-
     return new DedicatedVaultCredentials(vaultToken);
   }
 

ojdbc-provider-hashicorp/src/main/java/oracle/jdbc/provider/hashicorp/dedicated/configuration/DedicatedVaultConfigurationParameters.java

@@ -73,7 +73,7 @@ public static ParameterSetParser.Builder configureBuilder(ParameterSetParser.Bui
             // Tied to HashicorpCredentialsFactory.AUTHENTICATION_METHOD
             DedicatedVaultCredentialsFactory.AUTHENTICATION_METHOD,
             // Default value if none is specified:
-            DedicatedVaultAuthenticationMethod.TOKEN,
+            DedicatedVaultAuthenticationMethod.VAULT_TOKEN,
             DedicatedVaultConfigurationParameters::parseAuthentication)
             ;
   }
@@ -86,10 +86,12 @@ public static ParameterSetParser.Builder configureBuilder(ParameterSetParser.Bui
    * @throws IllegalArgumentException if the value is unrecognized.
    */
   private static DedicatedVaultAuthenticationMethod parseAuthentication(String value) {
-    if ("TOKEN".equalsIgnoreCase(value) || "VAULT_TOKEN".equalsIgnoreCase(value)) {
-      return DedicatedVaultAuthenticationMethod.TOKEN;
+    switch (value.toUpperCase()) {
+      case "VAULT_TOKEN":
+        return DedicatedVaultAuthenticationMethod.VAULT_TOKEN;
+      default:
+        throw new IllegalArgumentException(
+                "Unrecognized Hashicorp authentication value: " + value);
     }
-    throw new IllegalArgumentException(
-            "Unrecognized Hashicorp authentication value: " + value);
   }
 }

ojdbc-provider-hashicorp/src/main/java/oracle/jdbc/provider/hashicorp/dedicated/configuration/DedicatedVaultSecretsManagerConfigurationProvider.java

@@ -54,18 +54,18 @@ public class DedicatedVaultSecretsManagerConfigurationProvider extends OracleCon
 
   static final ParameterSetParser PARAMETER_SET_PARSER =
           DedicatedVaultConfigurationParameters.configureBuilder(
-          ParameterSetParser.builder()
-            .addParameter("value",
-               DedicatedVaultSecretsManagerFactory.SECRET_PATH)
-            .addParameter("key",
-               DedicatedVaultSecretsManagerFactory.KEY)
-            .addParameter("VAULT_ADDR",
-               DedicatedVaultSecretsManagerFactory.VAULT_ADDR)
-            .addParameter("VAULT_TOKEN",
-               DedicatedVaultSecretsManagerFactory.VAULT_TOKEN)
-            .addParameter("FILED_NAME",
-               DedicatedVaultSecretsManagerFactory.FIELD_NAME))
-          .build();
+            ParameterSetParser.builder()
+              .addParameter("value",
+                 DedicatedVaultSecretsManagerFactory.SECRET_PATH)
+              .addParameter("key",
+                 DedicatedVaultSecretsManagerFactory.KEY)
+              .addParameter("VAULT_ADDR",
+                 DedicatedVaultSecretsManagerFactory.VAULT_ADDR)
+              .addParameter("VAULT_TOKEN",
+                 DedicatedVaultSecretsManagerFactory.VAULT_TOKEN)
+              .addParameter("FIELD_NAME",
+                 DedicatedVaultSecretsManagerFactory.FIELD_NAME))
+            .build();
 
   @Override
   public InputStream getJson(String secretPath) {

ojdbc-provider-hashicorp/src/main/java/oracle/jdbc/provider/hashicorp/dedicated/secrets/DedicatedVaultSecretsManagerFactory.java

@@ -50,11 +50,11 @@
 import oracle.sql.json.OracleJsonValue;
 
 import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.util.Scanner;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static oracle.jdbc.provider.parameter.Parameter.CommonAttribute.REQUIRED;
@@ -145,8 +145,10 @@ private static String fetchSecretFromVault(String vaultUrl, String token) {
                 "Failed to fetch secret. HTTP error code: " + conn.getResponseCode());
       }
 
-      try (InputStream in = conn.getInputStream()) {
-        return readStream(in);
+      try (InputStream in = conn.getInputStream();
+        Scanner scanner = new Scanner(in, UTF_8.name())) {
+          scanner.useDelimiter("\\A");
+          return scanner.hasNext() ? scanner.next() : "";
       } finally {
         conn.disconnect();
       }
@@ -156,17 +158,6 @@ private static String fetchSecretFromVault(String vaultUrl, String token) {
     }
   }
 
-  private static String readStream(InputStream in) throws IOException {
-    ByteArrayOutputStream baos = new ByteArrayOutputStream();
-    byte[] buffer = new byte[1024];
-    int bytesRead;
-    while ((bytesRead = in.read(buffer)) != -1) {
-      baos.write(buffer, 0, bytesRead);
-    }
-    return new String(baos.toByteArray(), UTF_8);
-  }
-
-
   /**
    * Extracts a specific key's value from a JSON-formatted secret.
    *