org.h2.value.ValueToObjectConverter Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of h2-mvstore Show documentation
Show all versions of h2-mvstore Show documentation
Fork of h2database to maintain Java 8 compatibility
The newest version!
/*
* 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.value;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.Reader;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Array;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.SQLXML;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.OffsetTime;
import java.time.Period;
import java.time.ZonedDateTime;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map.Entry;
import java.util.UUID;
import org.h2.api.ErrorCode;
import org.h2.api.Interval;
import org.h2.engine.Session;
import org.h2.jdbc.JdbcArray;
import org.h2.jdbc.JdbcBlob;
import org.h2.jdbc.JdbcClob;
import org.h2.jdbc.JdbcConnection;
import org.h2.jdbc.JdbcLob;
import org.h2.jdbc.JdbcResultSet;
import org.h2.jdbc.JdbcSQLXML;
import org.h2.message.DbException;
import org.h2.message.TraceObject;
import org.h2.util.JSR310Utils;
import org.h2.util.JdbcUtils;
import org.h2.util.LegacyDateTimeUtils;
/**
* Data type conversion methods between values and Java objects.
*/
public final class ValueToObjectConverter extends TraceObject {
/**
* The Geometry class. This object is null if the JTS jar file is not in the
* classpath.
*/
public static final Class GEOMETRY_CLASS;
private static final String GEOMETRY_CLASS_NAME = "org.locationtech.jts.geom.Geometry";
static {
Class g;
try {
g = JdbcUtils.loadUserClass(GEOMETRY_CLASS_NAME);
} catch (Exception e) {
g = null;
}
GEOMETRY_CLASS = g;
}
/**
* Convert a Java object to a value.
*
* @param session
* the session
* @param x
* the value
* @param type
* the suggested value type, or {@code Value#UNKNOWN}
* @return the value
*/
public static Value objectToValue(Session session, Object x, int type) {
if (x == null) {
return ValueNull.INSTANCE;
} else if (type == Value.JAVA_OBJECT) {
return ValueJavaObject.getNoCopy(JdbcUtils.serialize(x, session.getJavaObjectSerializer()));
} else if (x instanceof Value) {
Value v = (Value) x;
if (v instanceof ValueLob) {
session.addTemporaryLob((ValueLob) v);
}
return v;
}
Class clazz = x.getClass();
if (clazz == String.class) {
return ValueVarchar.get((String) x, session);
} else if (clazz == Long.class) {
return ValueBigint.get((Long) x);
} else if (clazz == Integer.class) {
return ValueInteger.get((Integer) x);
} else if (clazz == Boolean.class) {
return ValueBoolean.get((Boolean) x);
} else if (clazz == Byte.class) {
return ValueTinyint.get((Byte) x);
} else if (clazz == Short.class) {
return ValueSmallint.get((Short) x);
} else if (clazz == Float.class) {
return ValueReal.get((Float) x);
} else if (clazz == Double.class) {
return ValueDouble.get((Double) x);
} else if (clazz == byte[].class) {
return ValueVarbinary.get((byte[]) x);
} else if (clazz == UUID.class) {
return ValueUuid.get((UUID) x);
} else if (clazz == Character.class) {
return ValueChar.get(((Character) x).toString());
} else if (clazz == LocalDate.class) {
return JSR310Utils.localDateToValue((LocalDate) x);
} else if (clazz == LocalTime.class) {
return JSR310Utils.localTimeToValue((LocalTime) x);
} else if (clazz == LocalDateTime.class) {
return JSR310Utils.localDateTimeToValue((LocalDateTime) x);
} else if (clazz == Instant.class) {
return JSR310Utils.instantToValue((Instant) x);
} else if (clazz == OffsetTime.class) {
return JSR310Utils.offsetTimeToValue((OffsetTime) x);
} else if (clazz == OffsetDateTime.class) {
return JSR310Utils.offsetDateTimeToValue((OffsetDateTime) x);
} else if (clazz == ZonedDateTime.class) {
return JSR310Utils.zonedDateTimeToValue((ZonedDateTime) x);
} else if (clazz == Interval.class) {
Interval i = (Interval) x;
return ValueInterval.from(i.getQualifier(), i.isNegative(), i.getLeading(), i.getRemaining());
} else if (clazz == Period.class) {
return JSR310Utils.periodToValue((Period) x);
} else if (clazz == Duration.class) {
return JSR310Utils.durationToValue((Duration) x);
}
if (x instanceof Object[]) {
return arrayToValue(session, x);
} else if (GEOMETRY_CLASS != null && GEOMETRY_CLASS.isAssignableFrom(clazz)) {
return ValueGeometry.getFromGeometry(x);
} else if (x instanceof BigInteger) {
return ValueNumeric.get((BigInteger) x);
} else if (x instanceof BigDecimal) {
return ValueNumeric.getAnyScale((BigDecimal) x);
} else {
return otherToValue(session, x);
}
}
private static Value otherToValue(Session session, Object x) {
if (x instanceof Array) {
Array array = (Array) x;
try {
return arrayToValue(session, array.getArray());
} catch (SQLException e) {
throw DbException.convert(e);
}
} else if (x instanceof ResultSet) {
return resultSetToValue(session, (ResultSet) x);
}
ValueLob lob;
if (x instanceof Reader) {
Reader r = (Reader) x;
if (!(r instanceof BufferedReader)) {
r = new BufferedReader(r);
}
lob = session.getDataHandler().getLobStorage().createClob(r, -1);
} else if (x instanceof Clob) {
try {
Clob clob = (Clob) x;
Reader r = new BufferedReader(clob.getCharacterStream());
lob = session.getDataHandler().getLobStorage().createClob(r, clob.length());
} catch (SQLException e) {
throw DbException.convert(e);
}
} else if (x instanceof InputStream) {
lob = session.getDataHandler().getLobStorage().createBlob((InputStream) x, -1);
} else if (x instanceof Blob) {
try {
Blob blob = (Blob) x;
lob = session.getDataHandler().getLobStorage().createBlob(blob.getBinaryStream(), blob.length());
} catch (SQLException e) {
throw DbException.convert(e);
}
} else if (x instanceof SQLXML) {
try {
lob = session.getDataHandler().getLobStorage()
.createClob(new BufferedReader(((SQLXML) x).getCharacterStream()), -1);
} catch (SQLException e) {
throw DbException.convert(e);
}
} else {
Value v = LegacyDateTimeUtils.legacyObjectToValue(session, x);
if (v != null) {
return v;
}
return ValueJavaObject.getNoCopy(JdbcUtils.serialize(x, session.getJavaObjectSerializer()));
}
return session.addTemporaryLob(lob);
}
private static Value arrayToValue(Session session, Object x) {
// (a.getClass().isArray());
// (a.getClass().getComponentType().isPrimitive());
Object[] o = (Object[]) x;
int len = o.length;
Value[] v = new Value[len];
for (int i = 0; i < len; i++) {
v[i] = objectToValue(session, o[i], Value.UNKNOWN);
}
return ValueArray.get(v, session);
}
static Value resultSetToValue(Session session, ResultSet rs) {
try {
ResultSetMetaData meta = rs.getMetaData();
int columnCount = meta.getColumnCount();
LinkedHashMap columns = readResultSetMeta(session, meta, columnCount);
if (!rs.next()) {
throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, "Empty ResultSet to ROW value");
}
Value[] list = new Value[columnCount];
Iterator> iterator = columns.entrySet().iterator();
for (int j = 0; j < columnCount; j++) {
list[j] = ValueToObjectConverter.objectToValue(session, rs.getObject(j + 1),
iterator.next().getValue().getValueType());
}
if (rs.next()) {
throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, "Multi-row ResultSet to ROW value");
}
return ValueRow.get(new ExtTypeInfoRow(columns), list);
} catch (SQLException e) {
throw DbException.convert(e);
}
}
private static LinkedHashMap readResultSetMeta(Session session, ResultSetMetaData meta,
int columnCount) throws SQLException {
LinkedHashMap columns = new LinkedHashMap<>();
for (int i = 0; i < columnCount; i++) {
String alias = meta.getColumnLabel(i + 1);
String columnTypeName = meta.getColumnTypeName(i + 1);
int columnType = DataType.convertSQLTypeToValueType(meta.getColumnType(i + 1), columnTypeName);
int precision = meta.getPrecision(i + 1);
int scale = meta.getScale(i + 1);
TypeInfo typeInfo;
if (columnType == Value.ARRAY && columnTypeName.endsWith(" ARRAY")) {
typeInfo = TypeInfo
.getTypeInfo(Value.ARRAY, -1L, 0,
TypeInfo.getTypeInfo(DataType.getTypeByName(
columnTypeName.substring(0, columnTypeName.length() - 6),
session.getMode()).type));
} else {
typeInfo = TypeInfo.getTypeInfo(columnType, precision, scale, null);
}
columns.put(alias, typeInfo);
}
return columns;
}
/**
* Converts the specified value to an object of the specified type.
*
* @param
* the type
* @param type
* the class
* @param value
* the value
* @param conn
* the connection
* @return the object of the specified class representing the specified
* value, or {@code null}
*/
@SuppressWarnings("unchecked")
public static T valueToObject(Class type, Value value, JdbcConnection conn) {
if (value == ValueNull.INSTANCE) {
return null;
} else if (type == BigDecimal.class) {
return (T) value.getBigDecimal();
} else if (type == BigInteger.class) {
return (T) value.getBigDecimal().toBigInteger();
} else if (type == String.class) {
return (T) value.getString();
} else if (type == Boolean.class) {
return (T) (Boolean) value.getBoolean();
} else if (type == Byte.class) {
return (T) (Byte) value.getByte();
} else if (type == Short.class) {
return (T) (Short) value.getShort();
} else if (type == Integer.class) {
return (T) (Integer) value.getInt();
} else if (type == Long.class) {
return (T) (Long) value.getLong();
} else if (type == Float.class) {
return (T) (Float) value.getFloat();
} else if (type == Double.class) {
return (T) (Double) value.getDouble();
} else if (type == UUID.class) {
return (T) value.convertToUuid().getUuid();
} else if (type == byte[].class) {
return (T) value.getBytes();
} else if (type == Character.class) {
String s = value.getString();
return (T) (Character) (s.isEmpty() ? ' ' : s.charAt(0));
} else if (type == Interval.class) {
if (!(value instanceof ValueInterval)) {
value = value.convertTo(TypeInfo.TYPE_INTERVAL_DAY_TO_SECOND);
}
ValueInterval v = (ValueInterval) value;
return (T) new Interval(v.getQualifier(), false, v.getLeading(), v.getRemaining());
} else if (type == LocalDate.class) {
return (T) JSR310Utils.valueToLocalDate(value, conn);
} else if (type == LocalTime.class) {
return (T) JSR310Utils.valueToLocalTime(value, conn);
} else if (type == LocalDateTime.class) {
return (T) JSR310Utils.valueToLocalDateTime(value, conn);
} else if (type == OffsetTime.class) {
return (T) JSR310Utils.valueToOffsetTime(value, conn);
} else if (type == OffsetDateTime.class) {
return (T) JSR310Utils.valueToOffsetDateTime(value, conn);
} else if (type == ZonedDateTime.class) {
return (T) JSR310Utils.valueToZonedDateTime(value, conn);
} else if (type == Instant.class) {
return (T) JSR310Utils.valueToInstant(value, conn);
} else if (type == Period.class) {
return (T) JSR310Utils.valueToPeriod(value);
} else if (type == Duration.class) {
return (T) JSR310Utils.valueToDuration(value);
} else if (type.isArray()) {
return (T) valueToArray(type, value, conn);
} else if (GEOMETRY_CLASS != null && GEOMETRY_CLASS.isAssignableFrom(type)) {
return (T) value.convertToGeometry(null).getGeometry();
} else {
return (T) valueToOther(type, value, conn);
}
}
private static Object valueToArray(Class type, Value value, JdbcConnection conn) {
Value[] array = ((ValueArray) value).getList();
Class componentType = type.getComponentType();
int length = array.length;
Object[] objArray = (Object[]) java.lang.reflect.Array.newInstance(componentType, length);
for (int i = 0; i < length; i++) {
objArray[i] = valueToObject(componentType, array[i], conn);
}
return objArray;
}
private static Object valueToOther(Class type, Value value, JdbcConnection conn) {
if (type == Object.class) {
return JdbcUtils.deserialize(
value.convertToJavaObject(TypeInfo.TYPE_JAVA_OBJECT, Value.CONVERT_TO, null).getBytesNoCopy(),
conn.getJavaObjectSerializer());
} else if (type == InputStream.class) {
return value.getInputStream();
} else if (type == Reader.class) {
return value.getReader();
} else if (type == java.sql.Array.class) {
return new JdbcArray(conn, value, getNextId(TraceObject.ARRAY));
} else if (type == Blob.class) {
return new JdbcBlob(conn, value, JdbcLob.State.WITH_VALUE, getNextId(TraceObject.BLOB));
} else if (type == Clob.class) {
return new JdbcClob(conn, value, JdbcLob.State.WITH_VALUE, getNextId(TraceObject.CLOB));
} else if (type == SQLXML.class) {
return new JdbcSQLXML(conn, value, JdbcLob.State.WITH_VALUE, getNextId(TraceObject.SQLXML));
} else if (type == ResultSet.class) {
return new JdbcResultSet(conn, null, null, value.convertToAnyRow().getResult(),
getNextId(TraceObject.RESULT_SET), true, false, false);
} else {
Object obj = LegacyDateTimeUtils.valueToLegacyType(type, value, conn);
if (obj != null) {
return obj;
}
if (value.getValueType() == Value.JAVA_OBJECT) {
obj = JdbcUtils.deserialize(value.getBytesNoCopy(), conn.getJavaObjectSerializer());
if (type.isAssignableFrom(obj.getClass())) {
return obj;
}
}
throw DbException.getUnsupportedException("converting to class " + type.getName());
}
}
/**
* Get the name of the Java class for the given value type.
*
* @param type
* the value type
* @param forJdbc
* if {@code true} get class for JDBC layer, if {@code false} get
* class for Java functions API
* @return the class
*/
public static Class getDefaultClass(int type, boolean forJdbc) {
switch (type) {
case Value.NULL:
return Void.class;
case Value.CHAR:
case Value.VARCHAR:
case Value.VARCHAR_IGNORECASE:
case Value.ENUM:
return String.class;
case Value.CLOB:
return Clob.class;
case Value.BINARY:
case Value.VARBINARY:
case Value.JSON:
return byte[].class;
case Value.BLOB:
return Blob.class;
case Value.BOOLEAN:
return Boolean.class;
case Value.TINYINT:
if (forJdbc) {
return Integer.class;
}
return Byte.class;
case Value.SMALLINT:
if (forJdbc) {
return Integer.class;
}
return Short.class;
case Value.INTEGER:
return Integer.class;
case Value.BIGINT:
return Long.class;
case Value.NUMERIC:
case Value.DECFLOAT:
return BigDecimal.class;
case Value.REAL:
return Float.class;
case Value.DOUBLE:
return Double.class;
case Value.DATE:
return forJdbc ? java.sql.Date.class : LocalDate.class;
case Value.TIME:
return forJdbc ? java.sql.Time.class : LocalTime.class;
case Value.TIME_TZ:
return OffsetTime.class;
case Value.TIMESTAMP:
return forJdbc ? java.sql.Timestamp.class : LocalDateTime.class;
case Value.TIMESTAMP_TZ:
return OffsetDateTime.class;
case Value.INTERVAL_YEAR:
case Value.INTERVAL_MONTH:
case Value.INTERVAL_DAY:
case Value.INTERVAL_HOUR:
case Value.INTERVAL_MINUTE:
case Value.INTERVAL_SECOND:
case Value.INTERVAL_YEAR_TO_MONTH:
case Value.INTERVAL_DAY_TO_HOUR:
case Value.INTERVAL_DAY_TO_MINUTE:
case Value.INTERVAL_DAY_TO_SECOND:
case Value.INTERVAL_HOUR_TO_MINUTE:
case Value.INTERVAL_HOUR_TO_SECOND:
case Value.INTERVAL_MINUTE_TO_SECOND:
return Interval.class;
case Value.JAVA_OBJECT:
return forJdbc ? Object.class : byte[].class;
case Value.GEOMETRY: {
Class clazz = GEOMETRY_CLASS;
return clazz != null ? clazz : String.class;
}
case Value.UUID:
return UUID.class;
case Value.ARRAY:
if (forJdbc) {
return Array.class;
}
return Object[].class;
case Value.ROW:
if (forJdbc) {
return ResultSet.class;
}
return Object[].class;
default:
throw DbException.getUnsupportedException("data type " + type);
}
}
/**
* Converts the specified value to the default Java object for its type.
*
* @param value
* the value
* @param conn
* the connection
* @param forJdbc
* if {@code true} perform conversion for JDBC layer, if
* {@code false} perform conversion for Java functions API
* @return the object
*/
public static Object valueToDefaultObject(Value value, JdbcConnection conn, boolean forJdbc) {
switch (value.getValueType()) {
case Value.NULL:
return null;
case Value.CHAR:
case Value.VARCHAR:
case Value.VARCHAR_IGNORECASE:
case Value.ENUM:
return value.getString();
case Value.CLOB:
return new JdbcClob(conn, value, JdbcLob.State.WITH_VALUE, getNextId(TraceObject.CLOB));
case Value.BINARY:
case Value.VARBINARY:
case Value.JSON:
return value.getBytes();
case Value.BLOB:
return new JdbcBlob(conn, value, JdbcLob.State.WITH_VALUE, getNextId(TraceObject.BLOB));
case Value.BOOLEAN:
return value.getBoolean();
case Value.TINYINT:
if (forJdbc) {
return value.getInt();
}
return value.getByte();
case Value.SMALLINT:
if (forJdbc) {
return value.getInt();
}
return value.getShort();
case Value.INTEGER:
return value.getInt();
case Value.BIGINT:
return value.getLong();
case Value.NUMERIC:
case Value.DECFLOAT:
return value.getBigDecimal();
case Value.REAL:
return value.getFloat();
case Value.DOUBLE:
return value.getDouble();
case Value.DATE:
return forJdbc ? LegacyDateTimeUtils.toDate(conn, null, value) : JSR310Utils.valueToLocalDate(value, null);
case Value.TIME:
return forJdbc ? LegacyDateTimeUtils.toTime(conn, null, value) : JSR310Utils.valueToLocalTime(value, null);
case Value.TIME_TZ:
return JSR310Utils.valueToOffsetTime(value, null);
case Value.TIMESTAMP:
return forJdbc ? LegacyDateTimeUtils.toTimestamp(conn, null, value)
: JSR310Utils.valueToLocalDateTime(value, null);
case Value.TIMESTAMP_TZ:
return JSR310Utils.valueToOffsetDateTime(value, null);
case Value.INTERVAL_YEAR:
case Value.INTERVAL_MONTH:
case Value.INTERVAL_DAY:
case Value.INTERVAL_HOUR:
case Value.INTERVAL_MINUTE:
case Value.INTERVAL_SECOND:
case Value.INTERVAL_YEAR_TO_MONTH:
case Value.INTERVAL_DAY_TO_HOUR:
case Value.INTERVAL_DAY_TO_MINUTE:
case Value.INTERVAL_DAY_TO_SECOND:
case Value.INTERVAL_HOUR_TO_MINUTE:
case Value.INTERVAL_HOUR_TO_SECOND:
case Value.INTERVAL_MINUTE_TO_SECOND:
return ((ValueInterval) value).getInterval();
case Value.JAVA_OBJECT:
return forJdbc ? JdbcUtils.deserialize(value.getBytesNoCopy(), conn.getJavaObjectSerializer())
: value.getBytes();
case Value.GEOMETRY:
return GEOMETRY_CLASS != null ? ((ValueGeometry) value).getGeometry() : value.getString();
case Value.UUID:
return ((ValueUuid) value).getUuid();
case Value.ARRAY:
if (forJdbc) {
return new JdbcArray(conn, value, getNextId(TraceObject.ARRAY));
}
return valueToDefaultArray(value, conn, forJdbc);
case Value.ROW:
if (forJdbc) {
return new JdbcResultSet(conn, null, null, ((ValueRow) value).getResult(),
getNextId(TraceObject.RESULT_SET), true, false, false);
}
return valueToDefaultArray(value, conn, forJdbc);
default:
throw DbException.getUnsupportedException("data type " + value.getValueType());
}
}
/**
* Converts the specified array value to array of default Java objects for
* its type.
*
* @param value
* the array value
* @param conn
* the connection
* @param forJdbc
* if {@code true} perform conversion for JDBC layer, if
* {@code false} perform conversion for Java functions API
* @return the object
*/
public static Object valueToDefaultArray(Value value, JdbcConnection conn, boolean forJdbc) {
Value[] values = ((ValueCollectionBase) value).getList();
int len = values.length;
Object[] list = new Object[len];
for (int i = 0; i < len; i++) {
list[i] = valueToDefaultObject(values[i], conn, forJdbc);
}
return list;
}
/**
* Read a value from the given result set.
*
* @param session
* the session
* @param rs
* the result set
* @param columnIndex
* the column index (1-based)
* @return the value
*/
public static Value readValue(Session session, JdbcResultSet rs, int columnIndex) {
Value value = rs.getInternal(columnIndex);
switch (value.getValueType()) {
case Value.CLOB:
value = session.addTemporaryLob(
session.getDataHandler().getLobStorage().createClob(new BufferedReader(value.getReader()), -1));
break;
case Value.BLOB:
value = session
.addTemporaryLob(session.getDataHandler().getLobStorage().createBlob(value.getInputStream(), -1));
}
return value;
}
private ValueToObjectConverter() {
}
}