Add model management Java API

clients/client-java/src/main/java/org/apache/gravitino/client/DTOConverters.java

@@ -124,6 +124,18 @@ static Catalog toCatalog(String metalake, CatalogDTO catalog, RESTClient client)
             .withAudit((AuditDTO) catalog.auditInfo())
             .withRestClient(client)
             .build();
+      case MODEL:
+        return GenericModelCatalog.builder()
+            .withNamespace(namespace)
+            .withName(catalog.name())
+            .withType(catalog.type())
+            .withProvider(catalog.provider())
+            .withComment(catalog.comment())
+            .withProperties(catalog.properties())
+            .withAudit((AuditDTO) catalog.auditInfo())
+            .withRestClient(client)
+            .build();
+
       default:
         throw new UnsupportedOperationException("Unsupported catalog type: " + catalog.type());
     }

clients/client-java/src/main/java/org/apache/gravitino/client/ErrorHandlers.java

@@ -41,12 +41,16 @@
 import org.apache.gravitino.exceptions.MetalakeAlreadyExistsException;
 import org.apache.gravitino.exceptions.MetalakeInUseException;
 import org.apache.gravitino.exceptions.MetalakeNotInUseException;
+import org.apache.gravitino.exceptions.ModelAlreadyExistsException;
+import org.apache.gravitino.exceptions.ModelVersionAliasesAlreadyExistException;
 import org.apache.gravitino.exceptions.NoSuchCatalogException;
 import org.apache.gravitino.exceptions.NoSuchCredentialException;
 import org.apache.gravitino.exceptions.NoSuchFilesetException;
 import org.apache.gravitino.exceptions.NoSuchGroupException;
 import org.apache.gravitino.exceptions.NoSuchMetadataObjectException;
 import org.apache.gravitino.exceptions.NoSuchMetalakeException;
+import org.apache.gravitino.exceptions.NoSuchModelException;
+import org.apache.gravitino.exceptions.NoSuchModelVersionException;
 import org.apache.gravitino.exceptions.NoSuchPartitionException;
 import org.apache.gravitino.exceptions.NoSuchRoleException;
 import org.apache.gravitino.exceptions.NoSuchSchemaException;
@@ -220,6 +224,15 @@ public static Consumer<ErrorResponse> ownerErrorHandler() {
     return OwnerErrorHandler.INSTANCE;
   }
 
+  /**
+   * Creates an error handler specific to Model operations.
+   *
+   * @return A Consumer representing the Model error handler.
+   */
+  public static Consumer<ErrorResponse> modelErrorHandler() {
+    return ModelErrorHandler.INSTANCE;
+  }
+
   private ErrorHandlers() {}
 
   /**
@@ -987,6 +1000,69 @@ public void accept(ErrorResponse errorResponse) {
     }
   }
 
+  /** Error handler specific to Model operations. */
+  @SuppressWarnings("FormatStringAnnotation")
+  private static class ModelErrorHandler extends RestErrorHandler {
+
+    private static final ModelErrorHandler INSTANCE = new ModelErrorHandler();
+
+    @Override
+    public void accept(ErrorResponse errorResponse) {
+      String errorMsg = formatErrorMessage(errorResponse);
+
+      switch (errorResponse.getCode()) {
+        case ErrorConstants.ILLEGAL_ARGUMENTS_CODE:
+          throw new IllegalArgumentException(errorMsg);
+
+        case ErrorConstants.NOT_FOUND_CODE:
+          if (errorResponse.getType().equals(NoSuchSchemaException.class.getSimpleName())) {
+            throw new NoSuchSchemaException(errorMsg);
+          } else if (errorResponse.getType().equals(NoSuchModelException.class.getSimpleName())) {
+            throw new NoSuchModelException(errorMsg);
+          } else if (errorResponse
+              .getType()
+              .equals(NoSuchModelVersionException.class.getSimpleName())) {
+            throw new NoSuchModelVersionException(errorMsg);
+          } else {
+            throw new NotFoundException(errorMsg);
+          }
+
+        case ErrorConstants.ALREADY_EXISTS_CODE:
+          if (errorResponse.getType().equals(ModelAlreadyExistsException.class.getSimpleName())) {
+            throw new ModelAlreadyExistsException(errorMsg);
+          } else if (errorResponse
+              .getType()
+              .equals(ModelVersionAliasesAlreadyExistException.class.getSimpleName())) {
+            throw new ModelVersionAliasesAlreadyExistException(errorMsg);
+          } else {
+            throw new AlreadyExistsException(errorMsg);
+          }
+
+        case ErrorConstants.FORBIDDEN_CODE:
+          throw new ForbiddenException(errorMsg);
+
+        case ErrorConstants.INTERNAL_ERROR_CODE:
+          throw new RuntimeException(errorMsg);
+
+        case ErrorConstants.NOT_IN_USE_CODE:
+          if (errorResponse.getType().equals(CatalogNotInUseException.class.getSimpleName())) {
+            throw new CatalogNotInUseException(errorMsg);
+
+          } else if (errorResponse
+              .getType()
+              .equals(MetalakeNotInUseException.class.getSimpleName())) {
+            throw new MetalakeNotInUseException(errorMsg);
+
+          } else {
+            throw new NotInUseException(errorMsg);
+          }
+
+        default:
+          super.accept(errorResponse);
+      }
+    }
+  }
+
   /** Generic error handler for REST requests. */
   private static class RestErrorHandler extends ErrorHandler {
     private static final ErrorHandler INSTANCE = new RestErrorHandler();

clients/client-java/src/main/java/org/apache/gravitino/client/GenericModel.java

@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.gravitino.client;
+
+import java.util.Map;
+import org.apache.gravitino.Audit;
+import org.apache.gravitino.authorization.SupportsRoles;
+import org.apache.gravitino.dto.model.ModelDTO;
+import org.apache.gravitino.model.Model;
+import org.apache.gravitino.tag.SupportsTags;
+
+/** Represents a generic model. */
+class GenericModel implements Model {
+
+  private final ModelDTO modelDTO;
+
+  GenericModel(ModelDTO modelDTO) {
+    this.modelDTO = modelDTO;
+  }
+
+  @Override
+  public Audit auditInfo() {
+    return modelDTO.auditInfo();
+  }
+
+  @Override
+  public String name() {
+    return modelDTO.name();
+  }
+
+  @Override
+  public String comment() {
+    return modelDTO.comment();
+  }
+
+  @Override
+  public Map<String, String> properties() {
+    return modelDTO.properties();
+  }
+
+  @Override
+  public int latestVersion() {
+    return modelDTO.latestVersion();
+  }
+
+  @Override
+  public SupportsTags supportsTags() {
+    throw new UnsupportedOperationException("Not supported yet.");
+  }
+
+  @Override
+  public SupportsRoles supportsRoles() {
+    throw new UnsupportedOperationException("Not supported yet.");
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (!(o instanceof GenericModel)) {
+      return false;
+    }
+
+    GenericModel that = (GenericModel) o;
+    return modelDTO.equals(that.modelDTO);
+  }
+
+  @Override
+  public int hashCode() {
+    return modelDTO.hashCode();
+  }
+}