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ComplexCopier.java
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245 lines (226 loc) · 8.96 KB
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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.
*/
import org.apache.arrow.vector.complex.impl.UnionMapReader;
import org.apache.arrow.vector.complex.reader.FieldReader;
import org.apache.arrow.vector.complex.writer.FieldWriter;
import org.apache.arrow.vector.types.Types;
<@pp.dropOutputFile />
<@pp.changeOutputFile name="/org/apache/arrow/vector/complex/impl/ComplexCopier.java" />
<#include "/@includes/license.ftl" />
package org.apache.arrow.vector.complex.impl;
<#include "/@includes/vv_imports.ftl" />
/*
* This class is generated using freemarker and the ${.template_name} template.
*/
@SuppressWarnings("unused")
public class ComplexCopier {
/**
* Do a deep copy of the value in input into output
* @param input field to read from
* @param output field to write to
*/
public static void copy(FieldReader input, FieldWriter output) {
writeValue(input, output, null);
}
public static void copy(FieldReader input, FieldWriter output, ExtensionTypeWriterFactory extensionTypeWriterFactory) {
writeValue(input, output, extensionTypeWriterFactory);
}
private static void writeValue(FieldReader reader, FieldWriter writer, ExtensionTypeWriterFactory extensionTypeWriterFactory) {
final MinorType mt = reader.getMinorType();
switch (mt) {
case LIST:
case LISTVIEW:
case LARGELIST:
case LARGELISTVIEW:
case FIXED_SIZE_LIST:
if (reader.isSet()) {
writer.startList();
while (reader.next()) {
FieldReader childReader = reader.reader();
FieldWriter childWriter = getListWriterForReader(childReader, writer);
if (childReader.isSet()) {
writeValue(childReader, childWriter, extensionTypeWriterFactory);
} else {
childWriter.writeNull();
}
}
writer.endList();
} else {
writer.writeNull();
}
break;
case MAP:
if (reader.isSet()) {
UnionMapReader mapReader = (UnionMapReader) reader;
writer.startMap();
while (mapReader.next()) {
FieldReader structReader = reader.reader();
if (structReader.isSet()) {
writer.startEntry();
writeValue(mapReader.key(), getMapWriterForReader(mapReader.key(), writer.key()), extensionTypeWriterFactory);
writeValue(mapReader.value(), getMapWriterForReader(mapReader.value(), writer.value()), extensionTypeWriterFactory);
writer.endEntry();
} else {
writer.writeNull();
}
}
writer.endMap();
} else {
writer.writeNull();
}
break;
case STRUCT:
if (reader.isSet()) {
writer.start();
for(String name : reader){
FieldReader childReader = reader.reader(name);
if (childReader.getMinorType() != Types.MinorType.NULL) {
FieldWriter childWriter = getStructWriterForReader(childReader, writer, name);
if (childReader.isSet()) {
writeValue(childReader, childWriter, extensionTypeWriterFactory);
} else {
childWriter.writeNull();
}
}
}
writer.end();
} else {
writer.writeNull();
}
break;
case EXTENSIONTYPE:
if (extensionTypeWriterFactory == null) {
throw new IllegalArgumentException("Must provide ExtensionTypeWriterFactory");
}
if (reader.isSet()) {
Object value = reader.readObject();
if (value != null) {
writer.addExtensionTypeWriterFactory(extensionTypeWriterFactory);
writer.writeExtension(value);
}
} else {
writer.writeNull();
}
break;
<#list vv.types as type><#list type.minor as minor><#assign name = minor.class?cap_first />
<#assign fields = minor.fields!type.fields />
<#assign uncappedName = name?uncap_first/>
<#if !minor.typeParams?? || minor.class?starts_with("Decimal") >
case ${name?upper_case}:
if (reader.isSet()) {
Nullable${name}Holder ${uncappedName}Holder = new Nullable${name}Holder();
reader.read(${uncappedName}Holder);
if (${uncappedName}Holder.isSet == 1) {
writer.write${name}(<#list fields as field>${uncappedName}Holder.${field.name}<#if field_has_next>, </#if></#list><#if minor.class?starts_with("Decimal")>, new ArrowType.Decimal(${uncappedName}Holder.precision, ${uncappedName}Holder.scale, ${name}Holder.WIDTH * 8)</#if>);
}
} else {
writer.writeNull();
}
break;
</#if>
</#list></#list>
}
}
private static FieldWriter getStructWriterForReader(FieldReader reader, StructWriter writer, String name) {
switch (reader.getMinorType()) {
<#list vv.types as type><#list type.minor as minor><#assign name = minor.class?cap_first />
<#assign fields = minor.fields!type.fields />
<#assign uncappedName = name?uncap_first/>
<#if !minor.typeParams??>
case ${name?upper_case}:
return (FieldWriter) writer.<#if name == "Int">integer<#else>${uncappedName}</#if>(name);
</#if>
<#if minor.class?starts_with("Decimal")>
case ${name?upper_case}:
if (reader.getField().getType() instanceof ArrowType.Decimal) {
ArrowType.Decimal type = (ArrowType.Decimal) reader.getField().getType();
return (FieldWriter) writer.${uncappedName}(name, type.getScale(), type.getPrecision());
} else {
return (FieldWriter) writer.${uncappedName}(name);
}
</#if>
</#list></#list>
case STRUCT:
return (FieldWriter) writer.struct(name);
case FIXED_SIZE_LIST:
case LIST:
return (FieldWriter) writer.list(name);
case MAP:
return (FieldWriter) writer.map(name);
case LISTVIEW:
return (FieldWriter) writer.listView(name);
case EXTENSIONTYPE:
ExtensionWriter extensionWriter = writer.extension(name, reader.getField().getType());
return (FieldWriter) extensionWriter;
default:
throw new UnsupportedOperationException(reader.getMinorType().toString());
}
}
private static FieldWriter getListWriterForReader(FieldReader reader, ListWriter writer) {
switch (reader.getMinorType()) {
<#list vv.types as type><#list type.minor as minor><#assign name = minor.class?cap_first />
<#assign fields = minor.fields!type.fields />
<#assign uncappedName = name?uncap_first/>
<#if !minor.typeParams?? || minor.class?starts_with("Decimal") >
case ${name?upper_case}:
return (FieldWriter) writer.<#if name == "Int">integer<#else>${uncappedName}</#if>();
</#if>
</#list></#list>
case STRUCT:
return (FieldWriter) writer.struct();
case FIXED_SIZE_LIST:
case LIST:
case MAP:
case NULL:
return (FieldWriter) writer.list();
case LISTVIEW:
return (FieldWriter) writer.listView();
case EXTENSIONTYPE:
ExtensionWriter extensionWriter = writer.extension(reader.getField().getType());
return (FieldWriter) extensionWriter;
default:
throw new UnsupportedOperationException(reader.getMinorType().toString());
}
}
private static FieldWriter getMapWriterForReader(FieldReader reader, MapWriter writer) {
switch (reader.getMinorType()) {
<#list vv.types as type><#list type.minor as minor><#assign name = minor.class?cap_first />
<#assign fields = minor.fields!type.fields />
<#assign uncappedName = name?uncap_first/>
<#if !minor.typeParams?? || minor.class?starts_with("Decimal") >
case ${name?upper_case}:
return (FieldWriter) writer.<#if name == "Int">integer<#else>${uncappedName}</#if>();
</#if>
</#list></#list>
case STRUCT:
return (FieldWriter) writer.struct();
case FIXED_SIZE_LIST:
case LIST:
case NULL:
return (FieldWriter) writer.list();
case LISTVIEW:
return (FieldWriter) writer.listView();
case MAP:
return (FieldWriter) writer.map(false);
case EXTENSIONTYPE:
ExtensionWriter extensionWriter = writer.extension(reader.getField().getType());
return (FieldWriter) extensionWriter;
default:
throw new UnsupportedOperationException(reader.getMinorType().toString());
}
}
}