Core: Add remaining View APIs and support for InMemoryCatalog

core/src/main/java/org/apache/iceberg/view/BaseMetastoreViewCatalog.java

@@ -0,0 +1,220 @@
+/*
+ * 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.iceberg.view;
+
+import java.util.List;
+import java.util.Map;
+import org.apache.iceberg.BaseMetastoreCatalog;
+import org.apache.iceberg.Schema;
+import org.apache.iceberg.catalog.Namespace;
+import org.apache.iceberg.catalog.TableIdentifier;
+import org.apache.iceberg.catalog.ViewCatalog;
+import org.apache.iceberg.exceptions.AlreadyExistsException;
+import org.apache.iceberg.exceptions.CommitFailedException;
+import org.apache.iceberg.exceptions.NoSuchViewException;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.relocated.com.google.common.collect.Lists;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+
+public abstract class BaseMetastoreViewCatalog extends BaseMetastoreCatalog implements ViewCatalog {
+  protected abstract ViewOperations newViewOps(TableIdentifier identifier);
+
+  @Override
+  public void initialize(String name, Map<String, String> properties) {
+    super.initialize(name, properties);
+  }
+
+  @Override
+  public String name() {
+    return super.name();
+  }
+
+  @Override
+  public View loadView(TableIdentifier identifier) {
+    if (isValidIdentifier(identifier)) {
+      ViewOperations ops = newViewOps(identifier);
+      if (ops.current() == null) {
+        throw new NoSuchViewException("View does not exist: %s", identifier);
+      } else {
+        return new BaseView(newViewOps(identifier), ViewUtil.fullViewName(name(), identifier));
+      }
+    }
+
+    throw new NoSuchViewException("Invalid view identifier: %s", identifier);
+  }
+
+  @Override
+  public ViewBuilder buildView(TableIdentifier identifier) {
+    return new BaseViewBuilder(identifier);
+  }
+
+  protected class BaseViewBuilder implements ViewBuilder {
+    private final TableIdentifier identifier;
+    private final Map<String, String> properties = Maps.newHashMap();
+    private final List<ViewRepresentation> representations = Lists.newArrayList();
+    private Namespace defaultNamespace = null;
+    private String defaultCatalog = null;
+    private Schema schema = null;
+
+    protected BaseViewBuilder(TableIdentifier identifier) {
+      Preconditions.checkArgument(
+          isValidIdentifier(identifier), "Invalid view identifier: %s", identifier);
+      this.identifier = identifier;
+    }
+
+    @Override
+    public ViewBuilder withSchema(Schema newSchema) {
+      this.schema = newSchema;
+      return this;
+    }
+
+    @Override
+    public ViewBuilder withQuery(String dialect, String sql) {
+      representations.add(
+          ImmutableSQLViewRepresentation.builder().dialect(dialect).sql(sql).build());
+      return this;
+    }
+
+    @Override
+    public ViewBuilder withDefaultCatalog(String catalog) {
+      this.defaultCatalog = catalog;
+      return this;
+    }
+
+    @Override
+    public ViewBuilder withDefaultNamespace(Namespace namespace) {
+      this.defaultNamespace = namespace;
+      return this;
+    }
+
+    @Override
+    public ViewBuilder withProperties(Map<String, String> newProperties) {
+      this.properties.putAll(newProperties);
+      return this;
+    }
+
+    @Override
+    public ViewBuilder withProperty(String key, String value) {
+      this.properties.put(key, value);
+      return this;
+    }
+
+    @Override
+    public View create() {
+      return create(newViewOps(identifier));
+    }
+
+    @Override
+    public View replace() {
+      return replace(newViewOps(identifier));
+    }
+
+    @Override
+    public View createOrReplace() {
+      ViewOperations ops = newViewOps(identifier);
+      if (null == ops.current()) {
+        return create(ops);
+      } else {
+        return replace(ops);
+      }
+    }
+
+    private View create(ViewOperations ops) {
+      if (null != ops.current()) {
+        throw new AlreadyExistsException("View already exists: %s", identifier);
+      }
+
+      Preconditions.checkState(
+          !representations.isEmpty(), "Cannot create view without specifying a query");
+      Preconditions.checkState(null != schema, "Cannot create view without specifying schema");
+      Preconditions.checkState(
+          null != defaultNamespace, "Cannot create view without specifying a default namespace");
+
+      ViewVersion viewVersion =
+          ImmutableViewVersion.builder()
+              .versionId(1)
+              .schemaId(schema.schemaId())
+              .addAllRepresentations(representations)
+              .defaultNamespace(defaultNamespace)
+              .defaultCatalog(defaultCatalog)
+              .timestampMillis(System.currentTimeMillis())
+              .putSummary("operation", "create")
+              .build();
+
+      ViewMetadata viewMetadata =
+          ViewMetadata.builder()
+              .setProperties(properties)
+              .setLocation(defaultWarehouseLocation(identifier))
+              .setCurrentVersion(viewVersion, schema)
+              .build();
+
+      try {
+        ops.commit(null, viewMetadata);
+      } catch (CommitFailedException ignored) {
+        throw new AlreadyExistsException("View was created concurrently: %s", identifier);
+      }
+
+      return new BaseView(ops, ViewUtil.fullViewName(name(), identifier));
+    }
+
+    private View replace(ViewOperations ops) {
+      if (null == ops.current()) {
+        throw new NoSuchViewException("View does not exist: %s", identifier);
+      }
+
+      Preconditions.checkState(
+          !representations.isEmpty(), "Cannot replace view without specifying a query");
+      Preconditions.checkState(null != schema, "Cannot replace view without specifying schema");
+      Preconditions.checkState(
+          null != defaultNamespace, "Cannot replace view without specifying a default namespace");
+
+      ViewMetadata metadata = ops.current();
+      int maxVersionId =
+          metadata.versions().stream()
+              .map(ViewVersion::versionId)
+              .max(Integer::compareTo)
+              .orElseGet(metadata::currentVersionId);
+
+      ViewVersion viewVersion =
+          ImmutableViewVersion.builder()
+              .versionId(maxVersionId + 1)
+              .schemaId(schema.schemaId())
+              .addAllRepresentations(representations)
+              .defaultNamespace(defaultNamespace)
+              .defaultCatalog(defaultCatalog)
+              .timestampMillis(System.currentTimeMillis())
+              .putSummary("operation", "replace")
+              .build();
+
+      ViewMetadata replacement =
+          ViewMetadata.buildFrom(metadata)
+              .setProperties(properties)
+              .setCurrentVersion(viewVersion, schema)
+              .build();
+
+      try {
+        ops.commit(metadata, replacement);
+      } catch (CommitFailedException ignored) {
+        throw new AlreadyExistsException("View was updated concurrently: %s", identifier);
+      }
+
+      return new BaseView(ops, ViewUtil.fullViewName(name(), identifier));
+    }
+  }
+}

core/src/main/java/org/apache/iceberg/view/BaseView.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.iceberg.view;
+
+import java.io.Serializable;
+import java.util.List;
+import java.util.Map;
+import org.apache.iceberg.Schema;
+
+public class BaseView implements View, Serializable {
+
+  private final ViewOperations ops;
+  private final String name;
+
+  public BaseView(ViewOperations ops, String name) {
+    this.ops = ops;
+    this.name = name;
+  }
+
+  @Override
+  public String name() {
+    return name;
+  }
+
+  public ViewOperations operations() {
+    return ops;
+  }
+
+  @Override
+  public Schema schema() {
+    return operations().current().schema();
+  }
+
+  @Override
+  public Map<Integer, Schema> schemas() {
+    return operations().current().schemasById();
+  }
+
+  @Override
+  public ViewVersion currentVersion() {
+    return operations().current().currentVersion();
+  }
+
+  @Override
+  public Iterable<ViewVersion> versions() {
+    return operations().current().versions();
+  }
+
+  @Override
+  public ViewVersion version(int versionId) {
+    return operations().current().version(versionId);
+  }
+
+  @Override
+  public List<ViewHistoryEntry> history() {
+    return operations().current().history();
+  }
+
+  @Override
+  public Map<String, String> properties() {
+    return operations().current().properties();
+  }
+
+  @Override
+  public UpdateViewProperties updateProperties() {
+    return new PropertiesUpdate(ops);
+  }
+
+  @Override
+  public ReplaceViewVersion replaceVersion() {
+    return new ViewVersionReplace(ops);
+  }
+}