org.opensearch.ml.common.dataframe.Row Maven / Gradle / Ivy
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/*
* Copyright OpenSearch Contributors
* SPDX-License-Identifier: Apache-2.0
*/
package org.opensearch.ml.common.dataframe;
import static org.opensearch.core.xcontent.XContentParserUtils.ensureExpectedToken;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.opensearch.core.common.io.stream.StreamInput;
import org.opensearch.core.common.io.stream.StreamOutput;
import org.opensearch.core.common.io.stream.Writeable;
import org.opensearch.core.xcontent.ToXContent;
import org.opensearch.core.xcontent.ToXContentObject;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.core.xcontent.XContentParser;
import lombok.AccessLevel;
import lombok.ToString;
import lombok.experimental.FieldDefaults;
@FieldDefaults(makeFinal = true, level = AccessLevel.PRIVATE)
@ToString
public class Row implements Iterable, Writeable, ToXContentObject {
ColumnValue[] values;
Row(int size) {
this.values = new ColumnValue[size];
Arrays.fill(this.values, new NullValue());
}
public Row(ColumnValue[] values) {
this.values = values;
}
Row(StreamInput input) throws IOException {
this.values = input.readArray(new ColumnValueReader(), ColumnValue[]::new);
}
void setValue(int index, ColumnValue value) {
if (index < 0 || index > size() - 1) {
throw new IllegalArgumentException("index is out of scope, index:" + index + "; row size:" + size());
}
this.values[index] = value;
}
public ColumnValue getValue(int index) {
if (index < 0 || index > size() - 1) {
throw new IllegalArgumentException("index is out of scope, index:" + index + "; row size:" + size());
}
return this.values[index];
}
@Override
public Iterator iterator() {
return Arrays.stream(this.values).iterator();
}
public int size() {
return values.length;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeArray(values);
}
Row remove(int removedIndex) {
if (removedIndex < 0 || removedIndex >= values.length) {
throw new IllegalArgumentException("removed index can't be negative or bigger than row's values length:" + values.length);
}
ColumnValue[] newValues = new ColumnValue[Math.max(values.length - 1, 0)];
int index = 0;
for (int i = 0; i < values.length && i != removedIndex; i++) {
newValues[index++] = values[i];
}
return new Row(newValues);
}
Row select(int[] columns) {
ColumnValue[] newValues = new ColumnValue[columns.length];
int index = 0;
for (int col : columns) {
newValues[index++] = values[col];
}
return new Row(newValues);
}
public static Row parse(XContentParser parser) throws IOException {
List values = new ArrayList<>();
ensureExpectedToken(XContentParser.Token.START_OBJECT, parser.currentToken(), parser);
while (parser.nextToken() != XContentParser.Token.END_OBJECT) {
String fieldName = parser.currentName();
parser.nextToken();
switch (fieldName) {
case "values":
ensureExpectedToken(XContentParser.Token.START_ARRAY, parser.currentToken(), parser);
while (parser.nextToken() != XContentParser.Token.END_ARRAY) {
ensureExpectedToken(XContentParser.Token.START_OBJECT, parser.currentToken(), parser);
if (parser.nextToken() != XContentParser.Token.END_OBJECT) {
String columnTypeField = parser.currentName();
if (!"column_type".equals(columnTypeField)) {
throw new IllegalArgumentException(
"wrong column type, expect column_type field but got " + columnTypeField
);
}
parser.nextToken();
String columnType = parser.text();
if (!"NULL".equals(columnType)) {
parser.nextToken();
String valueField = parser.currentName();
if (!"value".equals(valueField)) {
throw new IllegalArgumentException("wrong column value, expect value field but got " + valueField);
}
parser.nextToken();
}
switch (columnType) {
case "NULL":
values.add(new NullValue());
break;
case "BOOLEAN":
values.add(new BooleanValue(parser.booleanValue()));
break;
case "STRING":
values.add(new StringValue(parser.text()));
break;
case "SHORT":
values.add(new ShortValue(parser.shortValue()));
break;
case "INTEGER":
values.add(new IntValue(parser.intValue()));
break;
case "LONG":
values.add(new LongValue(parser.longValue()));
break;
case "FLOAT":
values.add(new FloatValue(parser.floatValue()));
break;
case "DOUBLE":
values.add(new DoubleValue(parser.doubleValue()));
break;
default:
break;
}
parser.skipChildren();
parser.nextToken();
}
}
break;
default:
parser.skipChildren();
break;
}
}
return new Row(values.toArray(new ColumnValue[0]));
}
public XContentBuilder toXContent(XContentBuilder builder) throws IOException {
return toXContent(builder, EMPTY_PARAMS);
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, ToXContent.Params params) throws IOException {
builder.startObject();
builder.startArray("values");
for (ColumnValue value : values) {
value.toXContent(builder, params);
}
builder.endArray();
builder.endObject();
return builder;
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Row other = (Row) o;
if (this.size() != other.size()) {
return false;
}
for (int i = 0; i < this.size(); i++) {
if (!this.getValue(i).equals(other.getValue(i))) {
return false;
}
}
return true;
}
public boolean equals(Row other) {
if (this.size() != other.size()) {
return false;
}
for (int i = 0; i < this.size(); i++) {
if (!this.getValue(i).equals(other.getValue(i))) {
return false;
}
}
return true;
}
}