Remove use of Guava in services

Closes #23009

common/src/main/java/org/keycloak/common/util/SecretGenerator.java

@@ -70,4 +70,4 @@ public class SecretGenerator {
         return buf;
     }
 
-}
+}

federation/sssd/src/main/java/org/keycloak/federation/sssd/SSSDFederationProviderFactory.java

@@ -97,4 +97,4 @@ public class SSSDFederationProviderFactory implements UserStorageProviderFactory
     public boolean isSupported() {
         return AvailabilityChecker.isAvailable();
     }
-}
+}

server-spi/src/main/java/org/keycloak/utils/StringUtil.java

@@ -28,6 +28,10 @@ public class StringUtil {
         return str != null && !"".equals(str.trim());
     }
 
+    public static boolean isNullOrEmpty(String str) {
+        return str == null || str.isEmpty();
+    }
+
     /**
      * Calling:
      * <pre>joinValuesWithLogicalCondition("or", Arrays.asList("foo", "bar", "baz", "caz" ))</pre>
@@ -52,4 +56,4 @@ public class StringUtil {
         return options.toString();
     }
 
-}
+}

services/src/main/java/org/keycloak/authentication/AuthenticatorUtil.java

@@ -17,7 +17,6 @@
 
 package org.keycloak.authentication;
 
-import com.google.common.collect.Sets;
 import org.jboss.logging.Logger;
 import org.keycloak.authentication.actiontoken.ActionTokenContext;
 import org.keycloak.authentication.actiontoken.DefaultActionToken;
@@ -33,6 +32,7 @@ import org.keycloak.sessions.AuthenticationSessionModel;
 import org.keycloak.utils.StringUtil;
 
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Objects;
@@ -94,7 +94,12 @@ public class AuthenticatorUtil {
         final String callbacksFactories = authSession.getAuthNote(CALLBACKS_FACTORY_IDS_NOTE);
 
         if (StringUtil.isNotBlank(callbacksFactories)) {
-            return Sets.newHashSet(callbacksFactories.split(Constants.CFG_DELIMITER));
+            String[] split = callbacksFactories.split(Constants.CFG_DELIMITER);
+            Set<String> set = new HashSet<>(split.length);
+            for (String s : split) {
+                set.add(s);
+            }
+            return Collections.unmodifiableSet(set);
         } else {
             return Collections.emptySet();
         }

services/src/main/java/org/keycloak/protocol/oidc/OIDCWellKnownProvider.java

@@ -17,7 +17,6 @@
 
 package org.keycloak.protocol.oidc;
 
-import com.google.common.collect.Streams;
 import org.keycloak.OAuth2Constants;
 import org.keycloak.authentication.ClientAuthenticator;
 import org.keycloak.authentication.ClientAuthenticatorFactory;
@@ -242,7 +241,7 @@ public class OIDCWellKnownProvider implements WellKnownProvider {
                 .map(ProviderFactory::getId);
 
         if (includeNone) {
-            supportedAlgorithms = Streams.concat(supportedAlgorithms, Stream.of("none"));
+            supportedAlgorithms = Stream.concat(supportedAlgorithms, Stream.of("none"));
         }
         return supportedAlgorithms.collect(Collectors.toList());
     }

services/src/main/java/org/keycloak/protocol/oidc/grants/ciba/CibaClientValidation.java

@@ -18,18 +18,11 @@
 
 package org.keycloak.protocol.oidc.grants.ciba;
 
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
-
-import com.google.common.collect.Streams;
-import org.keycloak.crypto.ClientSignatureVerifierProvider;
 import org.keycloak.crypto.SignatureProvider;
 import org.keycloak.jose.jws.Algorithm;
 import org.keycloak.models.CibaConfig;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
-import org.keycloak.provider.ProviderFactory;
-import org.keycloak.validation.DefaultClientValidationProvider;
 import org.keycloak.validation.ValidationContext;
 
 import static org.keycloak.common.util.UriUtils.checkUrl;

services/src/main/java/org/keycloak/protocol/saml/DefaultSamlArtifactResolver.java

@@ -1,12 +1,12 @@
 package org.keycloak.protocol.saml;
 
-import com.google.common.base.Strings;
 import org.jboss.logging.Logger;
 import org.keycloak.models.AuthenticatedClientSessionModel;
 import org.keycloak.models.ClientModel;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.protocol.saml.util.ArtifactBindingUtils;
 import org.keycloak.saml.common.constants.GeneralConstants;
+import org.keycloak.utils.StringUtil;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -35,7 +35,7 @@ public class DefaultSamlArtifactResolver implements ArtifactResolver {
 
         logger.tracef("Artifact response for artifact %s, is %s", artifact, artifactResponseString);
 
-        if (Strings.isNullOrEmpty(artifactResponseString)) {
+        if (StringUtil.isNullOrEmpty(artifactResponseString)) {
             throw new ArtifactResolverProcessingException("Artifact not present in ClientSession.");
         }
 

services/src/main/java/org/keycloak/services/clientregistration/oidc/DescriptionConverter.java

@@ -17,7 +17,6 @@
 
 package org.keycloak.services.clientregistration.oidc;
 
-import com.google.common.collect.Streams;
 import org.keycloak.OAuth2Constants;
 import org.keycloak.authentication.ClientAuthenticator;
 import org.keycloak.authentication.ClientAuthenticatorFactory;
@@ -274,7 +273,7 @@ public class DescriptionConverter {
                 .map(ProviderFactory::getId);
 
         if (includeNone) {
-            supportedAlgorithms = Streams.concat(supportedAlgorithms, Stream.of("none"));
+            supportedAlgorithms = Stream.concat(supportedAlgorithms, Stream.of("none"));
         }
         return supportedAlgorithms.collect(Collectors.toList());
     }

services/src/main/java/org/keycloak/services/resources/admin/IdentityProviderResource.java

@@ -18,7 +18,6 @@ package org.keycloak.services.resources.admin;
 
 import static jakarta.ws.rs.core.Response.Status.BAD_REQUEST;
 
-import com.google.common.collect.Streams;
 import org.eclipse.microprofile.openapi.annotations.Operation;
 import org.eclipse.microprofile.openapi.annotations.extensions.Extension;
 import org.eclipse.microprofile.openapi.annotations.parameters.Parameter;
@@ -245,7 +244,7 @@ public class IdentityProviderResource {
 
 
     private IdentityProviderFactory getIdentityProviderFactory() {
-        return Streams.concat(session.getKeycloakSessionFactory().getProviderFactoriesStream(IdentityProvider.class),
+        return Stream.concat(session.getKeycloakSessionFactory().getProviderFactoriesStream(IdentityProvider.class),
                 session.getKeycloakSessionFactory().getProviderFactoriesStream(SocialIdentityProvider.class))
                 .filter(providerFactory -> Objects.equals(providerFactory.getId(), identityProviderModel.getProviderId()))
                 .map(IdentityProviderFactory.class::cast)

services/src/main/java/org/keycloak/services/resources/admin/IdentityProvidersResource.java

@@ -17,7 +17,6 @@
 
 package org.keycloak.services.resources.admin;
 
-import com.google.common.collect.Streams;
 import org.eclipse.microprofile.openapi.annotations.Operation;
 import org.eclipse.microprofile.openapi.annotations.extensions.Extension;
 import org.eclipse.microprofile.openapi.annotations.parameters.Parameter;
@@ -281,7 +280,7 @@ public class IdentityProvidersResource {
     }
 
     private Stream<ProviderFactory> getProviderFactories() {
-        return Streams.concat(session.getKeycloakSessionFactory().getProviderFactoriesStream(IdentityProvider.class),
+        return Stream.concat(session.getKeycloakSessionFactory().getProviderFactoriesStream(IdentityProvider.class),
                 session.getKeycloakSessionFactory().getProviderFactoriesStream(SocialIdentityProvider.class));
     }