/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.rowdata;
import java.math.BigDecimal;
import java.util.UUID;
import com.foundationdb.server.AkServerUtil;
import com.foundationdb.server.types.TClass;
import com.foundationdb.server.types.TInstance;
import com.foundationdb.server.types.aksql.aktypes.AkGUID;
import com.foundationdb.server.types.common.BigDecimalWrapperImpl;
import com.foundationdb.server.types.common.types.TBigDecimal;
import com.foundationdb.server.types.common.types.TString;
import com.foundationdb.server.types.mcompat.mtypes.MDateAndTime;
import com.foundationdb.server.types.mcompat.mtypes.MNumeric;
import com.foundationdb.server.types.value.ValueSource;
import com.foundationdb.util.AkibanAppender;
abstract class AbstractRowDataValueSource implements ValueSource {
// ValueSource interface
@Override
public TInstance getType() {
return fieldDef().column().getType();
}
@Override
public boolean hasAnyValue() {
return true;
}
@Override
public boolean hasRawValue() {
return ! hasCacheValue();
}
@Override
public boolean hasCacheValue() {
return fieldDef().column().getType().typeClass() instanceof TString;
}
@Override
public boolean canGetRawValue() {
return true;
}
@Override
public abstract boolean isNull();
@Override
public boolean getBoolean() {
return extractLong(signage()) != 0;
}
@Override
public boolean getBoolean(boolean defaultValue) {
return isNull() ? defaultValue : getBoolean();
}
@Override
public byte getInt8() {
return (byte) extractLong(signage());
}
@Override
public short getInt16() {
return (short) extractLong(signage());
}
@Override
public char getUInt16() {
return (char) extractLong(signage());
}
@Override
public int getInt32() {
return (int) extractLong(signage());
}
@Override
public long getInt64() {
return extractLong(signage());
}
@Override
public float getFloat() {
return doGetFloat();
}
@Override
public double getDouble() {
return doGetDouble();
}
@Override
public byte[] getBytes() {
long offsetAndWidth = getRawOffsetAndWidth();
if (offsetAndWidth == 0) {
return null;
}
int offset = (int) offsetAndWidth + fieldDef().getPrefixSize();
int size = (int) (offsetAndWidth >>> 32) - fieldDef().getPrefixSize();
byte[] bytes = new byte[size];
System.arraycopy(bytes(), offset, bytes, 0, size);
return bytes;
}
@Override
public String getString() {
final long location = getRawOffsetAndWidth();
return location == 0
? null
: AkServerUtil.decodeMySQLString(bytes(), (int) location, (int) (location >>> 32), fieldDef());
}
@Override
public Object getObject() {
if (fieldDef().column().getType().typeClass() instanceof TString) {
return getString();
} else if (fieldDef().column().getType().typeClass() instanceof TBigDecimal) {
return getDecimal();
} else if (fieldDef().column().getType().typeClass() instanceof AkGUID) {
return getGUID();
} else {
assert false : "Unable to get object for type: " + fieldDef();
}
return null;
}
// for subclasses
protected abstract long getRawOffsetAndWidth();
protected abstract byte[] bytes();
protected abstract FieldDef fieldDef();
// for use within this class
private UUID getGUID() {
final long location = getRawOffsetAndWidth();
int offset = (int) location;
int width = (int) (location >>> 32);
byte[] bytes = bytes();
final int prefixSize = fieldDef().getPrefixSize();
if ( width != 16) {
throw new IllegalArgumentException(String.format(
"GUID must be 16 bytes instead: %d", width));
}
if (location == 0) {
return null;
} else {
return AkGUID.bytesToUUID(bytes, offset+prefixSize);
}
}
private BigDecimalWrapperImpl getDecimal() {
AkibanAppender appender = AkibanAppender.of(new StringBuilder(fieldDef().getMaxStorageSize()));
ConversionHelperBigDecimal.decodeToString(fieldDef(), bytes(), getRawOffsetAndWidth(), appender);
String asString = appender.toString();
assert ! asString.isEmpty();
try {
return new BigDecimalWrapperImpl(new BigDecimal(asString));
} catch (NumberFormatException e) {
throw new NumberFormatException(asString);
}
}
private double doGetDouble() {
long asLong = extractLong(Signage.SIGNED);
return Double.longBitsToDouble(asLong);
}
private float doGetFloat() {
long asLong = extractLong(Signage.SIGNED);
int asInt = (int) asLong;
return Float.intBitsToFloat(asInt);
}
private long extractLong(Signage signage) {
long offsetAndWidth = getCheckedOffsetAndWidth();
final int offset = (int)offsetAndWidth;
final int width = (int)(offsetAndWidth >>> 32);
if ((signage == Signage.SIGNED) || (width == 8)) {
return AkServerUtil.getSignedIntegerByWidth(bytes(), offset, width);
} else {
assert signage == Signage.UNSIGNED;
return AkServerUtil.getUnsignedIntegerByWidth(bytes(), offset, width);
}
}
private Signage signage() {
TClass tclass = fieldDef().column().getType().typeClass();
if (tclass instanceof MNumeric)
return ((MNumeric)tclass).isUnsigned() ? Signage.UNSIGNED : Signage.SIGNED;
else if (tclass == MDateAndTime.YEAR)
return Signage.UNSIGNED;
else
return Signage.SIGNED;
}
private long getCheckedOffsetAndWidth() {
long offsetAndWidth = getRawOffsetAndWidth();
if (offsetAndWidth == 0) {
throw new RowDataException("value is null");
}
return offsetAndWidth;
}
// object state
private enum Signage {
SIGNED, UNSIGNED
}
}