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1 | /* |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | ||
18 | package org.apache.arrow.vector.complex.impl; | |
19 | ||
20 | import org.apache.arrow.vector.complex.writer.BaseWriter; | |
21 | import org.apache.arrow.vector.complex.writer.BaseWriter.StructOrListWriter; | |
22 | import org.apache.arrow.vector.complex.writer.BigIntWriter; | |
23 | import org.apache.arrow.vector.complex.writer.BitWriter; | |
24 | import org.apache.arrow.vector.complex.writer.Float4Writer; | |
25 | import org.apache.arrow.vector.complex.writer.Float8Writer; | |
26 | import org.apache.arrow.vector.complex.writer.IntWriter; | |
27 | import org.apache.arrow.vector.complex.writer.VarBinaryWriter; | |
28 | import org.apache.arrow.vector.complex.writer.VarCharWriter; | |
29 | ||
30 | /** | |
31 | * Concrete implementation of {@link StructOrListWriter}. | |
32 | */ | |
33 | public class StructOrListWriterImpl implements StructOrListWriter { | |
34 | ||
35 | public final BaseWriter.StructWriter struct; | |
36 | public final BaseWriter.ListWriter list; | |
37 | ||
38 | /** | |
39 | * Constructs a new instance using a {@link BaseWriter.StructWriter} | |
40 | * (instead of an {@link BaseWriter.ListWriter}). | |
41 | */ | |
42 | public StructOrListWriterImpl(final BaseWriter.StructWriter writer) { | |
43 | this.struct = writer; | |
44 | this.list = null; | |
45 | } | |
46 | ||
47 | /** | |
48 | * Constructs a new instance using a {@link BaseWriter.ListWriter} | |
49 | * (instead of a {@link BaseWriter.StructWriter}). | |
50 | */ | |
51 | public StructOrListWriterImpl(final BaseWriter.ListWriter writer) { | |
52 | this.struct = null; | |
53 | this.list = writer; | |
54 | } | |
55 | ||
56 | /** | |
57 | * Start writing to either the list or the struct. | |
58 | */ | |
59 | public void start() { | |
60 | if (struct != null) { | |
61 | struct.start(); | |
62 | } else { | |
63 | list.startList(); | |
64 | } | |
65 | } | |
66 | ||
67 | /** | |
68 | * Finish writing to the list or struct. | |
69 | */ | |
70 | public void end() { | |
71 | if (struct != null) { | |
72 | struct.end(); | |
73 | } else { | |
74 | list.endList(); | |
75 | } | |
76 | } | |
77 | ||
78 | /** | |
79 | * Creates a new writer for a struct with the given name. | |
80 | */ | |
81 | public StructOrListWriter struct(final String name) { | |
82 | assert struct != null; | |
83 | return new StructOrListWriterImpl(struct.struct(name)); | |
84 | } | |
85 | ||
86 | /** | |
87 | * Creates a new writer for a list of structs. | |
88 | * | |
89 | * @param name Unused. | |
90 | */ | |
91 | public StructOrListWriter listoftstruct(final String name) { | |
92 | assert list != null; | |
93 | return new StructOrListWriterImpl(list.struct()); | |
94 | } | |
95 | ||
96 | public StructOrListWriter list(final String name) { | |
97 | assert struct != null; | |
98 | return new StructOrListWriterImpl(struct.list(name)); | |
99 | } | |
100 | ||
101 | public boolean isStructWriter() { | |
102 | return struct != null; | |
103 | } | |
104 | ||
105 | public boolean isListWriter() { | |
106 | return list != null; | |
107 | } | |
108 | ||
109 | public VarCharWriter varChar(final String name) { | |
110 | return (struct != null) ? struct.varChar(name) : list.varChar(); | |
111 | } | |
112 | ||
113 | public IntWriter integer(final String name) { | |
114 | return (struct != null) ? struct.integer(name) : list.integer(); | |
115 | } | |
116 | ||
117 | public BigIntWriter bigInt(final String name) { | |
118 | return (struct != null) ? struct.bigInt(name) : list.bigInt(); | |
119 | } | |
120 | ||
121 | public Float4Writer float4(final String name) { | |
122 | return (struct != null) ? struct.float4(name) : list.float4(); | |
123 | } | |
124 | ||
125 | public Float8Writer float8(final String name) { | |
126 | return (struct != null) ? struct.float8(name) : list.float8(); | |
127 | } | |
128 | ||
129 | public BitWriter bit(final String name) { | |
130 | return (struct != null) ? struct.bit(name) : list.bit(); | |
131 | } | |
132 | ||
133 | public VarBinaryWriter binary(final String name) { | |
134 | return (struct != null) ? struct.varBinary(name) : list.varBinary(); | |
135 | } | |
136 | ||
137 | } |