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Start to refactor format from CatalogFile
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112
core/src/main/java/org/apache/iceberg/io/CASCatalogFormat.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| /* | ||
| * 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.io; | ||
|
|
||
| import java.io.DataInputStream; | ||
| import java.io.DataOutputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.UncheckedIOException; | ||
| import java.util.Collections; | ||
| import java.util.Map; | ||
| import java.util.UUID; | ||
| import java.util.stream.Collectors; | ||
| import org.apache.iceberg.catalog.Namespace; | ||
| import org.apache.iceberg.catalog.TableIdentifier; | ||
| import org.apache.iceberg.relocated.com.google.common.collect.Maps; | ||
|
|
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| public class CASCatalogFormat extends CatalogFormat { | ||
|
|
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| @Override | ||
| public CatalogFile.MutCatalogFile empty() { | ||
| // TODO record format | ||
| return new CatalogFile.MutCatalogFile(); | ||
| } | ||
|
|
||
| @Override | ||
| public CatalogFile.MutCatalogFile from(CatalogFile other) { | ||
| // TODO | ||
| return null; | ||
| } | ||
|
|
||
| @Override | ||
| public CatalogFile read(InputFile catalogLocation) { | ||
| final Map<TableIdentifier, CatalogFile.TableInfo> fqti = Maps.newHashMap(); | ||
| final Map<Namespace, Map<String, String>> namespaces = Maps.newHashMap(); | ||
| try (InputStream in = catalogLocation.newStream(); | ||
| DataInputStream din = new DataInputStream(in)) { | ||
| int nNamespaces = din.readInt(); | ||
| for (int i = 0; i < nNamespaces; ++i) { | ||
| Namespace namespace = readNamespace(din); | ||
| Map<String, String> props = readProperties(din); | ||
| namespaces.put(namespace, props); | ||
| } | ||
| int nTables = din.readInt(); | ||
| for (int i = 0; i < nTables; i++) { | ||
| int tableVersion = din.readInt(); | ||
| Namespace namespace = readNamespace(din); | ||
| TableIdentifier tid = TableIdentifier.of(namespace, din.readUTF()); | ||
| fqti.put(tid, new CatalogFile.TableInfo(tableVersion, din.readUTF())); | ||
| } | ||
| int seqno = din.readInt(); | ||
| long msb = din.readLong(); | ||
| long lsb = din.readLong(); | ||
| return new CatalogFile(new UUID(msb, lsb), seqno, namespaces, fqti, catalogLocation); | ||
| } catch (IOException e) { | ||
| throw new UncheckedIOException(e); | ||
| } | ||
| } | ||
|
|
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| private static Map<String, String> readProperties(DataInputStream in) throws IOException { | ||
| int nprops = in.readInt(); | ||
| Map<String, String> props = nprops > 0 ? Maps.newHashMap() : Collections.emptyMap(); | ||
| for (int j = 0; j < nprops; j++) { | ||
| props.put(in.readUTF(), in.readUTF()); | ||
| } | ||
| return props; | ||
| } | ||
|
|
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| private static Namespace readNamespace(DataInputStream in) throws IOException { | ||
| int nlen = in.readInt(); | ||
| String[] levels = new String[nlen]; | ||
| for (int j = 0; j < nlen; j++) { | ||
| levels[j] = in.readUTF(); | ||
| } | ||
| return Namespace.of(levels); | ||
| } | ||
|
|
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| static void writeNamespace(DataOutputStream out, Namespace namespace) throws IOException { | ||
| out.writeInt(namespace.length()); | ||
| for (String n : namespace.levels()) { | ||
| out.writeUTF(n); | ||
| } | ||
| } | ||
|
|
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| static void writeProperties(DataOutputStream out, Map<String, String> props) throws IOException { | ||
| Map<String, String> writeProps = | ||
| props.entrySet().stream() | ||
| .filter(e -> e.getValue() != null) | ||
| .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue)); | ||
| out.writeInt(writeProps.size()); | ||
| for (Map.Entry<String, String> p : writeProps.entrySet()) { | ||
| out.writeUTF(p.getKey()); | ||
| out.writeUTF(p.getValue()); | ||
| } | ||
| } | ||
| } |
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