-
Notifications
You must be signed in to change notification settings - Fork 28.2k
/
TableSchema.java
103 lines (85 loc) · 3.12 KB
/
TableSchema.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
/*
* 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.hive.service.cli;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.metastore.api.Schema;
import org.apache.hadoop.hive.serde2.thrift.Type;
import org.apache.hive.service.rpc.thrift.TColumnDesc;
import org.apache.hive.service.rpc.thrift.TTableSchema;
/**
* TableSchema.
*
*/
public class TableSchema {
private final List<ColumnDescriptor> columns = new ArrayList<ColumnDescriptor>();
public TableSchema() {
}
public TableSchema(int numColumns) {
// TODO: remove this constructor
}
public TableSchema(TTableSchema tTableSchema) {
for (TColumnDesc tColumnDesc : tTableSchema.getColumns()) {
columns.add(new ColumnDescriptor(tColumnDesc));
}
}
public TableSchema(List<FieldSchema> fieldSchemas) {
int pos = 1;
for (FieldSchema field : fieldSchemas) {
columns.add(new ColumnDescriptor(field.getName(), field.getComment(),
new TypeDescriptor(field.getType()), pos++));
}
}
public TableSchema(Schema schema) {
this(schema.getFieldSchemas());
}
public List<ColumnDescriptor> getColumnDescriptors() {
return new ArrayList<ColumnDescriptor>(columns);
}
public ColumnDescriptor getColumnDescriptorAt(int pos) {
return columns.get(pos);
}
public int getSize() {
return columns.size();
}
public void clear() {
columns.clear();
}
public TTableSchema toTTableSchema() {
TTableSchema tTableSchema = new TTableSchema();
for (ColumnDescriptor col : columns) {
tTableSchema.addToColumns(col.toTColumnDesc());
}
return tTableSchema;
}
public TypeDescriptor[] toTypeDescriptors() {
TypeDescriptor[] types = new TypeDescriptor[columns.size()];
for (int i = 0; i < types.length; i++) {
types[i] = columns.get(i).getTypeDescriptor();
}
return types;
}
public TableSchema addPrimitiveColumn(String columnName, Type columnType, String columnComment) {
columns.add(ColumnDescriptor.newPrimitiveColumnDescriptor(columnName, columnComment, columnType, columns.size() + 1));
return this;
}
public TableSchema addStringColumn(String columnName, String columnComment) {
columns.add(ColumnDescriptor.newPrimitiveColumnDescriptor(columnName, columnComment, Type.STRING_TYPE, columns.size() + 1));
return this;
}
}