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org.h2.mvstore.db.ValueDataType Maven / Gradle / Ivy
/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.mvstore.db;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Arrays;
import org.h2.api.ErrorCode;
import org.h2.message.DbException;
import org.h2.mvstore.DataUtils;
import org.h2.mvstore.WriteBuffer;
import org.h2.mvstore.rtree.SpatialDataType;
import org.h2.mvstore.rtree.SpatialKey;
import org.h2.mvstore.type.DataType;
import org.h2.result.SortOrder;
import org.h2.store.DataHandler;
import org.h2.tools.SimpleResultSet;
import org.h2.value.CompareMode;
import org.h2.value.Value;
import org.h2.value.ValueArray;
import org.h2.value.ValueBoolean;
import org.h2.value.ValueByte;
import org.h2.value.ValueBytes;
import org.h2.value.ValueDate;
import org.h2.value.ValueDecimal;
import org.h2.value.ValueDouble;
import org.h2.value.ValueFloat;
import org.h2.value.ValueGeometry;
import org.h2.value.ValueInt;
import org.h2.value.ValueJavaObject;
import org.h2.value.ValueLobDb;
import org.h2.value.ValueLong;
import org.h2.value.ValueNull;
import org.h2.value.ValueResultSet;
import org.h2.value.ValueShort;
import org.h2.value.ValueString;
import org.h2.value.ValueStringFixed;
import org.h2.value.ValueStringIgnoreCase;
import org.h2.value.ValueTime;
import org.h2.value.ValueTimestamp;
import org.h2.value.ValueTimestampTimeZone;
import org.h2.value.ValueUuid;
/**
* A row type.
*/
public class ValueDataType implements DataType {
private static final int INT_0_15 = 32;
private static final int LONG_0_7 = 48;
private static final int DECIMAL_0_1 = 56;
private static final int DECIMAL_SMALL_0 = 58;
private static final int DECIMAL_SMALL = 59;
private static final int DOUBLE_0_1 = 60;
private static final int FLOAT_0_1 = 62;
private static final int BOOLEAN_FALSE = 64;
private static final int BOOLEAN_TRUE = 65;
private static final int INT_NEG = 66;
private static final int LONG_NEG = 67;
private static final int STRING_0_31 = 68;
private static final int BYTES_0_31 = 100;
private static final int SPATIAL_KEY_2D = 132;
final DataHandler handler;
final CompareMode compareMode;
final int[] sortTypes;
SpatialDataType spatialType;
public ValueDataType(CompareMode compareMode, DataHandler handler,
int[] sortTypes) {
this.compareMode = compareMode;
this.handler = handler;
this.sortTypes = sortTypes;
}
private SpatialDataType getSpatialDataType() {
if (spatialType == null) {
spatialType = new SpatialDataType(2);
}
return spatialType;
}
@Override
public int compare(Object a, Object b) {
if (a == b) {
return 0;
}
if (a instanceof ValueArray && b instanceof ValueArray) {
Value[] ax = ((ValueArray) a).getList();
Value[] bx = ((ValueArray) b).getList();
int al = ax.length;
int bl = bx.length;
int len = Math.min(al, bl);
for (int i = 0; i < len; i++) {
int sortType = sortTypes[i];
int comp = compareValues(ax[i], bx[i], sortType);
if (comp != 0) {
return comp;
}
}
if (len < al) {
return -1;
} else if (len < bl) {
return 1;
}
return 0;
}
return compareValues((Value) a, (Value) b, SortOrder.ASCENDING);
}
private int compareValues(Value a, Value b, int sortType) {
if (a == b) {
return 0;
}
// null is never stored;
// comparison with null is used to retrieve all entries
// in which case null is always lower than all entries
// (even for descending ordered indexes)
if (a == null) {
return -1;
} else if (b == null) {
return 1;
}
boolean aNull = a == ValueNull.INSTANCE;
boolean bNull = b == ValueNull.INSTANCE;
if (aNull || bNull) {
return SortOrder.compareNull(aNull, sortType);
}
int comp = a.compareTypeSafe(b, compareMode);
if ((sortType & SortOrder.DESCENDING) != 0) {
comp = -comp;
}
return comp;
}
@Override
public int getMemory(Object obj) {
if (obj instanceof SpatialKey) {
return getSpatialDataType().getMemory(obj);
}
return getMemory((Value) obj);
}
private static int getMemory(Value v) {
return v == null ? 0 : v.getMemory();
}
@Override
public void read(ByteBuffer buff, Object[] obj, int len, boolean key) {
for (int i = 0; i < len; i++) {
obj[i] = read(buff);
}
}
@Override
public void write(WriteBuffer buff, Object[] obj, int len, boolean key) {
for (int i = 0; i < len; i++) {
write(buff, obj[i]);
}
}
@Override
public Object read(ByteBuffer buff) {
return readValue(buff);
}
@Override
public void write(WriteBuffer buff, Object obj) {
if (obj instanceof SpatialKey) {
buff.put((byte) SPATIAL_KEY_2D);
getSpatialDataType().write(buff, obj);
return;
}
Value x = (Value) obj;
writeValue(buff, x);
}
private void writeValue(WriteBuffer buff, Value v) {
if (v == ValueNull.INSTANCE) {
buff.put((byte) 0);
return;
}
int type = v.getType();
switch (type) {
case Value.BOOLEAN:
buff.put((byte) (v.getBoolean().booleanValue() ?
BOOLEAN_TRUE : BOOLEAN_FALSE));
break;
case Value.BYTE:
buff.put((byte) type).put(v.getByte());
break;
case Value.SHORT:
buff.put((byte) type).putShort(v.getShort());
break;
case Value.INT: {
int x = v.getInt();
if (x < 0) {
buff.put((byte) INT_NEG).putVarInt(-x);
} else if (x < 16) {
buff.put((byte) (INT_0_15 + x));
} else {
buff.put((byte) type).putVarInt(x);
}
break;
}
case Value.LONG: {
long x = v.getLong();
if (x < 0) {
buff.put((byte) LONG_NEG).putVarLong(-x);
} else if (x < 8) {
buff.put((byte) (LONG_0_7 + x));
} else {
buff.put((byte) type).putVarLong(x);
}
break;
}
case Value.DECIMAL: {
BigDecimal x = v.getBigDecimal();
if (BigDecimal.ZERO.equals(x)) {
buff.put((byte) DECIMAL_0_1);
} else if (BigDecimal.ONE.equals(x)) {
buff.put((byte) (DECIMAL_0_1 + 1));
} else {
int scale = x.scale();
BigInteger b = x.unscaledValue();
int bits = b.bitLength();
if (bits <= 63) {
if (scale == 0) {
buff.put((byte) DECIMAL_SMALL_0).
putVarLong(b.longValue());
} else {
buff.put((byte) DECIMAL_SMALL).
putVarInt(scale).
putVarLong(b.longValue());
}
} else {
byte[] bytes = b.toByteArray();
buff.put((byte) type).
putVarInt(scale).
putVarInt(bytes.length).
put(bytes);
}
}
break;
}
case Value.TIME: {
ValueTime t = (ValueTime) v;
long nanos = t.getNanos();
long millis = nanos / 1000000;
nanos -= millis * 1000000;
buff.put((byte) type).
putVarLong(millis).
putVarLong(nanos);
break;
}
case Value.DATE: {
long x = ((ValueDate) v).getDateValue();
buff.put((byte) type).putVarLong(x);
break;
}
case Value.TIMESTAMP: {
ValueTimestamp ts = (ValueTimestamp) v;
long dateValue = ts.getDateValue();
long nanos = ts.getTimeNanos();
long millis = nanos / 1000000;
nanos -= millis * 1000000;
buff.put((byte) type).
putVarLong(dateValue).
putVarLong(millis).
putVarLong(nanos);
break;
}
case Value.TIMESTAMP_TZ: {
ValueTimestampTimeZone ts = (ValueTimestampTimeZone) v;
long dateValue = ts.getDateValue();
long nanos = ts.getTimeNanos();
long millis = nanos / 1000000;
nanos -= millis * 1000000;
buff.put((byte) type).
putVarLong(dateValue).
putVarLong(millis).
putVarLong(nanos).
putVarInt(ts.getTimeZoneOffsetMins());
break;
}
case Value.JAVA_OBJECT: {
byte[] b = v.getBytesNoCopy();
buff.put((byte) type).
putVarInt(b.length).
put(b);
break;
}
case Value.BYTES: {
byte[] b = v.getBytesNoCopy();
int len = b.length;
if (len < 32) {
buff.put((byte) (BYTES_0_31 + len)).
put(b);
} else {
buff.put((byte) type).
putVarInt(b.length).
put(b);
}
break;
}
case Value.UUID: {
ValueUuid uuid = (ValueUuid) v;
buff.put((byte) type).
putLong(uuid.getHigh()).
putLong(uuid.getLow());
break;
}
case Value.STRING: {
String s = v.getString();
int len = s.length();
if (len < 32) {
buff.put((byte) (STRING_0_31 + len)).
putStringData(s, len);
} else {
buff.put((byte) type);
writeString(buff, s);
}
break;
}
case Value.STRING_IGNORECASE:
case Value.STRING_FIXED:
buff.put((byte) type);
writeString(buff, v.getString());
break;
case Value.DOUBLE: {
double x = v.getDouble();
if (x == 1.0d) {
buff.put((byte) (DOUBLE_0_1 + 1));
} else {
long d = Double.doubleToLongBits(x);
if (d == ValueDouble.ZERO_BITS) {
buff.put((byte) DOUBLE_0_1);
} else {
buff.put((byte) type).
putVarLong(Long.reverse(d));
}
}
break;
}
case Value.FLOAT: {
float x = v.getFloat();
if (x == 1.0f) {
buff.put((byte) (FLOAT_0_1 + 1));
} else {
int f = Float.floatToIntBits(x);
if (f == ValueFloat.ZERO_BITS) {
buff.put((byte) FLOAT_0_1);
} else {
buff.put((byte) type).
putVarInt(Integer.reverse(f));
}
}
break;
}
case Value.BLOB:
case Value.CLOB: {
buff.put((byte) type);
ValueLobDb lob = (ValueLobDb) v;
byte[] small = lob.getSmall();
if (small == null) {
buff.putVarInt(-3).
putVarInt(lob.getTableId()).
putVarLong(lob.getLobId()).
putVarLong(lob.getPrecision());
} else {
buff.putVarInt(small.length).
put(small);
}
break;
}
case Value.ARRAY: {
Value[] list = ((ValueArray) v).getList();
buff.put((byte) type).putVarInt(list.length);
for (Value x : list) {
writeValue(buff, x);
}
break;
}
case Value.RESULT_SET: {
buff.put((byte) type);
try {
ResultSet rs = ((ValueResultSet) v).getResultSet();
rs.beforeFirst();
ResultSetMetaData meta = rs.getMetaData();
int columnCount = meta.getColumnCount();
buff.putVarInt(columnCount);
for (int i = 0; i < columnCount; i++) {
writeString(buff, meta.getColumnName(i + 1));
buff.putVarInt(meta.getColumnType(i + 1)).
putVarInt(meta.getPrecision(i + 1)).
putVarInt(meta.getScale(i + 1));
}
while (rs.next()) {
buff.put((byte) 1);
for (int i = 0; i < columnCount; i++) {
int t = org.h2.value.DataType.
getValueTypeFromResultSet(meta, i + 1);
Value val = org.h2.value.DataType.readValue(
null, rs, i + 1, t);
writeValue(buff, val);
}
}
buff.put((byte) 0);
rs.beforeFirst();
} catch (SQLException e) {
throw DbException.convert(e);
}
break;
}
case Value.GEOMETRY: {
byte[] b = v.getBytes();
int len = b.length;
buff.put((byte) type).
putVarInt(len).
put(b);
break;
}
default:
DbException.throwInternalError("type=" + v.getType());
}
}
private static void writeString(WriteBuffer buff, String s) {
int len = s.length();
buff.putVarInt(len).putStringData(s, len);
}
/**
* Read a value.
*
* @return the value
*/
private Object readValue(ByteBuffer buff) {
int type = buff.get() & 255;
switch (type) {
case Value.NULL:
return ValueNull.INSTANCE;
case BOOLEAN_TRUE:
return ValueBoolean.get(true);
case BOOLEAN_FALSE:
return ValueBoolean.get(false);
case INT_NEG:
return ValueInt.get(-readVarInt(buff));
case Value.INT:
return ValueInt.get(readVarInt(buff));
case LONG_NEG:
return ValueLong.get(-readVarLong(buff));
case Value.LONG:
return ValueLong.get(readVarLong(buff));
case Value.BYTE:
return ValueByte.get(buff.get());
case Value.SHORT:
return ValueShort.get(buff.getShort());
case DECIMAL_0_1:
return ValueDecimal.ZERO;
case DECIMAL_0_1 + 1:
return ValueDecimal.ONE;
case DECIMAL_SMALL_0:
return ValueDecimal.get(BigDecimal.valueOf(
readVarLong(buff)));
case DECIMAL_SMALL: {
int scale = readVarInt(buff);
return ValueDecimal.get(BigDecimal.valueOf(
readVarLong(buff), scale));
}
case Value.DECIMAL: {
int scale = readVarInt(buff);
int len = readVarInt(buff);
byte[] buff2 = DataUtils.newBytes(len);
buff.get(buff2, 0, len);
BigInteger b = new BigInteger(buff2);
return ValueDecimal.get(new BigDecimal(b, scale));
}
case Value.DATE: {
return ValueDate.fromDateValue(readVarLong(buff));
}
case Value.TIME: {
long nanos = readVarLong(buff) * 1000000 + readVarLong(buff);
return ValueTime.fromNanos(nanos);
}
case Value.TIMESTAMP: {
long dateValue = readVarLong(buff);
long nanos = readVarLong(buff) * 1000000 + readVarLong(buff);
return ValueTimestamp.fromDateValueAndNanos(dateValue, nanos);
}
case Value.TIMESTAMP_TZ: {
long dateValue = readVarLong(buff);
long nanos = readVarLong(buff) * 1000000 + readVarLong(buff);
short tz = (short) readVarInt(buff);
return ValueTimestampTimeZone.fromDateValueAndNanos(dateValue, nanos, tz);
}
case Value.BYTES: {
int len = readVarInt(buff);
byte[] b = DataUtils.newBytes(len);
buff.get(b, 0, len);
return ValueBytes.getNoCopy(b);
}
case Value.JAVA_OBJECT: {
int len = readVarInt(buff);
byte[] b = DataUtils.newBytes(len);
buff.get(b, 0, len);
return ValueJavaObject.getNoCopy(null, b, handler);
}
case Value.UUID:
return ValueUuid.get(buff.getLong(), buff.getLong());
case Value.STRING:
return ValueString.get(readString(buff));
case Value.STRING_IGNORECASE:
return ValueStringIgnoreCase.get(readString(buff));
case Value.STRING_FIXED:
return ValueStringFixed.get(readString(buff));
case FLOAT_0_1:
return ValueFloat.get(0);
case FLOAT_0_1 + 1:
return ValueFloat.get(1);
case DOUBLE_0_1:
return ValueDouble.get(0);
case DOUBLE_0_1 + 1:
return ValueDouble.get(1);
case Value.DOUBLE:
return ValueDouble.get(Double.longBitsToDouble(
Long.reverse(readVarLong(buff))));
case Value.FLOAT:
return ValueFloat.get(Float.intBitsToFloat(
Integer.reverse(readVarInt(buff))));
case Value.BLOB:
case Value.CLOB: {
int smallLen = readVarInt(buff);
if (smallLen >= 0) {
byte[] small = DataUtils.newBytes(smallLen);
buff.get(small, 0, smallLen);
return ValueLobDb.createSmallLob(type, small);
} else if (smallLen == -3) {
int tableId = readVarInt(buff);
long lobId = readVarLong(buff);
long precision = readVarLong(buff);
ValueLobDb lob = ValueLobDb.create(type,
handler, tableId, lobId, null, precision);
return lob;
} else {
throw DbException.get(ErrorCode.FILE_CORRUPTED_1,
"lob type: " + smallLen);
}
}
case Value.ARRAY: {
int len = readVarInt(buff);
Value[] list = new Value[len];
for (int i = 0; i < len; i++) {
list[i] = (Value) readValue(buff);
}
return ValueArray.get(list);
}
case Value.RESULT_SET: {
SimpleResultSet rs = new SimpleResultSet();
rs.setAutoClose(false);
int columns = readVarInt(buff);
for (int i = 0; i < columns; i++) {
rs.addColumn(readString(buff),
readVarInt(buff),
readVarInt(buff),
readVarInt(buff));
}
while (true) {
if (buff.get() == 0) {
break;
}
Object[] o = new Object[columns];
for (int i = 0; i < columns; i++) {
o[i] = ((Value) readValue(buff)).getObject();
}
rs.addRow(o);
}
return ValueResultSet.get(rs);
}
case Value.GEOMETRY: {
int len = readVarInt(buff);
byte[] b = DataUtils.newBytes(len);
buff.get(b, 0, len);
return ValueGeometry.get(b);
}
case SPATIAL_KEY_2D:
return getSpatialDataType().read(buff);
default:
if (type >= INT_0_15 && type < INT_0_15 + 16) {
return ValueInt.get(type - INT_0_15);
} else if (type >= LONG_0_7 && type < LONG_0_7 + 8) {
return ValueLong.get(type - LONG_0_7);
} else if (type >= BYTES_0_31 && type < BYTES_0_31 + 32) {
int len = type - BYTES_0_31;
byte[] b = DataUtils.newBytes(len);
buff.get(b, 0, len);
return ValueBytes.getNoCopy(b);
} else if (type >= STRING_0_31 && type < STRING_0_31 + 32) {
return ValueString.get(readString(buff, type - STRING_0_31));
}
throw DbException.get(ErrorCode.FILE_CORRUPTED_1, "type: " + type);
}
}
private static int readVarInt(ByteBuffer buff) {
return DataUtils.readVarInt(buff);
}
private static long readVarLong(ByteBuffer buff) {
return DataUtils.readVarLong(buff);
}
private static String readString(ByteBuffer buff, int len) {
return DataUtils.readString(buff, len);
}
private static String readString(ByteBuffer buff) {
int len = readVarInt(buff);
return DataUtils.readString(buff, len);
}
@Override
public int hashCode() {
return compareMode.hashCode() ^ Arrays.hashCode(sortTypes);
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
} else if (!(obj instanceof ValueDataType)) {
return false;
}
ValueDataType v = (ValueDataType) obj;
if (!compareMode.equals(v.compareMode)) {
return false;
}
return Arrays.equals(sortTypes, v.sortTypes);
}
}
