/*
* Copyright 2004-2023 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.result;
import java.io.IOException;
import org.h2.engine.Constants;
import org.h2.value.Transfer;
import org.h2.value.TypeInfo;
/**
* A result set column of a remote result.
*/
public class ResultColumn {
/**
* The column alias.
*/
final String alias;
/**
* The schema name or null.
*/
final String schemaName;
/**
* The table name or null.
*/
final String tableName;
/**
* The column name or null.
*/
final String columnName;
/**
* The column type.
*/
final TypeInfo columnType;
/**
* True if this is an identity column.
*/
final boolean identity;
/**
* True if this column is nullable.
*/
final int nullable;
/**
* Read an object from the given transfer object.
*
* @param in the object from where to read the data
*/
ResultColumn(Transfer in) throws IOException {
alias = in.readString();
schemaName = in.readString();
tableName = in.readString();
columnName = in.readString();
columnType = in.readTypeInfo();
if (in.getVersion() < Constants.TCP_PROTOCOL_VERSION_20) {
in.readInt();
}
identity = in.readBoolean();
nullable = in.readInt();
}
/**
* Write a result column to the given output.
*
* @param out the object to where to write the data
* @param result the result
* @param i the column index
* @throws IOException on failure
*/
public static void writeColumn(Transfer out, ResultInterface result, int i)
throws IOException {
out.writeString(result.getAlias(i));
out.writeString(result.getSchemaName(i));
out.writeString(result.getTableName(i));
out.writeString(result.getColumnName(i));
TypeInfo type = result.getColumnType(i);
out.writeTypeInfo(type);
if (out.getVersion() < Constants.TCP_PROTOCOL_VERSION_20) {
out.writeInt(type.getDisplaySize());
}
out.writeBoolean(result.isIdentity(i));
out.writeInt(result.getNullable(i));
}
}