
com.netease.arctic.shade.org.apache.iceberg.StaticTableOperations Maven / Gradle / Ivy
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* 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 com.netease.arctic.shade.org.apache.iceberg;
import com.netease.arctic.shade.org.apache.iceberg.io.FileIO;
import com.netease.arctic.shade.org.apache.iceberg.io.LocationProvider;
/**
* TableOperations implementation that provides access to metadata for a Table at some point in time, using a
* table metadata location. It will never refer to a different Metadata object than the one it was created with
* and cannot be used to create or delete files.
*/
public class StaticTableOperations implements TableOperations {
private TableMetadata staticMetadata;
private final String metadataFileLocation;
private final FileIO io;
private final LocationProvider locationProvider;
/**
* Creates a StaticTableOperations tied to a specific static version of the TableMetadata
*/
public StaticTableOperations(String metadataFileLocation, FileIO io) {
this(metadataFileLocation, io, null);
}
public StaticTableOperations(String metadataFileLocation, FileIO io, LocationProvider locationProvider) {
this.io = io;
this.metadataFileLocation = metadataFileLocation;
this.locationProvider = locationProvider;
}
@Override
public TableMetadata current() {
if (staticMetadata == null) {
staticMetadata = TableMetadataParser.read(io, metadataFileLocation);
}
return staticMetadata;
}
/**
* StaticTableOperations works on the same version of TableMetadata, and it will never refer a different TableMetadata
* object than the one it was created with.
* @return always {@link #current()}.
*/
@Override
public TableMetadata refresh() {
return current();
}
@Override
public void commit(TableMetadata base, TableMetadata metadata) {
throw new UnsupportedOperationException("Cannot modify a static table");
}
@Override
public FileIO io() {
return this.io;
}
@Override
public String metadataFileLocation(String fileName) {
throw new UnsupportedOperationException("Cannot modify a static table");
}
@Override
public LocationProvider locationProvider() {
return locationProvider;
}
}
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