| /* |
| * 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; |
| |
| import java.util.List; |
| import java.util.Set; |
| import org.apache.iceberg.relocated.com.google.common.base.Preconditions; |
| import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList; |
| import org.apache.iceberg.relocated.com.google.common.collect.Sets; |
| |
| public class UpdateRequirements { |
| |
| private UpdateRequirements() {} |
| |
| public static List<UpdateRequirement> forCreateTable(List<MetadataUpdate> metadataUpdates) { |
| Preconditions.checkArgument(null != metadataUpdates, "Invalid metadata updates: null"); |
| Builder builder = new Builder(null, false); |
| builder.require(new UpdateRequirement.AssertTableDoesNotExist()); |
| metadataUpdates.forEach(builder::update); |
| return builder.build(); |
| } |
| |
| public static List<UpdateRequirement> forReplaceTable( |
| TableMetadata base, List<MetadataUpdate> metadataUpdates) { |
| Preconditions.checkArgument(null != base, "Invalid table metadata: null"); |
| Preconditions.checkArgument(null != metadataUpdates, "Invalid metadata updates: null"); |
| Builder builder = new Builder(base, true); |
| builder.require(new UpdateRequirement.AssertTableUUID(base.uuid())); |
| metadataUpdates.forEach(builder::update); |
| return builder.build(); |
| } |
| |
| public static List<UpdateRequirement> forUpdateTable( |
| TableMetadata base, List<MetadataUpdate> metadataUpdates) { |
| Preconditions.checkArgument(null != base, "Invalid table metadata: null"); |
| Preconditions.checkArgument(null != metadataUpdates, "Invalid metadata updates: null"); |
| Builder builder = new Builder(base, false); |
| builder.require(new UpdateRequirement.AssertTableUUID(base.uuid())); |
| metadataUpdates.forEach(builder::update); |
| return builder.build(); |
| } |
| |
| private static class Builder { |
| private final TableMetadata base; |
| private final ImmutableList.Builder<UpdateRequirement> requirements = ImmutableList.builder(); |
| private final Set<String> changedRefs = Sets.newHashSet(); |
| private final boolean isReplace; |
| private boolean addedSchema = false; |
| private boolean setSchemaId = false; |
| private boolean addedSpec = false; |
| private boolean setSpecId = false; |
| private boolean setOrderId = false; |
| |
| private Builder(TableMetadata base, boolean isReplace) { |
| this.base = base; |
| this.isReplace = isReplace; |
| } |
| |
| private Builder require(UpdateRequirement requirement) { |
| Preconditions.checkArgument(requirement != null, "Invalid requirement: null"); |
| requirements.add(requirement); |
| return this; |
| } |
| |
| private Builder update(MetadataUpdate update) { |
| Preconditions.checkArgument(update != null, "Invalid update: null"); |
| |
| // add requirements based on the change |
| if (update instanceof MetadataUpdate.SetSnapshotRef) { |
| update((MetadataUpdate.SetSnapshotRef) update); |
| } else if (update instanceof MetadataUpdate.AddSchema) { |
| update((MetadataUpdate.AddSchema) update); |
| } else if (update instanceof MetadataUpdate.SetCurrentSchema) { |
| update((MetadataUpdate.SetCurrentSchema) update); |
| } else if (update instanceof MetadataUpdate.AddPartitionSpec) { |
| update((MetadataUpdate.AddPartitionSpec) update); |
| } else if (update instanceof MetadataUpdate.SetDefaultPartitionSpec) { |
| update((MetadataUpdate.SetDefaultPartitionSpec) update); |
| } else if (update instanceof MetadataUpdate.SetDefaultSortOrder) { |
| update((MetadataUpdate.SetDefaultSortOrder) update); |
| } |
| |
| return this; |
| } |
| |
| private void update(MetadataUpdate.SetSnapshotRef setRef) { |
| // require that the ref is unchanged from the base |
| String name = setRef.name(); |
| // add returns true the first time the ref name is added |
| boolean added = changedRefs.add(name); |
| if (added && base != null && !isReplace) { |
| SnapshotRef baseRef = base.ref(name); |
| // require that the ref does not exist (null) or is the same as the base snapshot |
| require( |
| new UpdateRequirement.AssertRefSnapshotID( |
| name, baseRef != null ? baseRef.snapshotId() : null)); |
| } |
| } |
| |
| private void update(MetadataUpdate.AddSchema update) { |
| if (!addedSchema) { |
| if (base != null) { |
| require(new UpdateRequirement.AssertLastAssignedFieldId(base.lastColumnId())); |
| } |
| this.addedSchema = true; |
| } |
| } |
| |
| private void update(MetadataUpdate.SetCurrentSchema update) { |
| if (!setSchemaId) { |
| if (base != null && !isReplace) { |
| // require that the current schema has not changed |
| require(new UpdateRequirement.AssertCurrentSchemaID(base.currentSchemaId())); |
| } |
| this.setSchemaId = true; |
| } |
| } |
| |
| private void update(MetadataUpdate.AddPartitionSpec update) { |
| if (!addedSpec) { |
| if (base != null) { |
| require( |
| new UpdateRequirement.AssertLastAssignedPartitionId(base.lastAssignedPartitionId())); |
| } |
| this.addedSpec = true; |
| } |
| } |
| |
| private void update(MetadataUpdate.SetDefaultPartitionSpec update) { |
| if (!setSpecId) { |
| if (base != null && !isReplace) { |
| // require that the default spec has not changed |
| require(new UpdateRequirement.AssertDefaultSpecID(base.defaultSpecId())); |
| } |
| this.setSpecId = true; |
| } |
| } |
| |
| private void update(MetadataUpdate.SetDefaultSortOrder update) { |
| if (!setOrderId) { |
| if (base != null && !isReplace) { |
| // require that the default write order has not changed |
| require(new UpdateRequirement.AssertDefaultSortOrderID(base.defaultSortOrderId())); |
| } |
| this.setOrderId = true; |
| } |
| } |
| |
| private List<UpdateRequirement> build() { |
| return requirements.build(); |
| } |
| } |
| } |