/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.rdf.internal.impl.literal;
import java.math.BigDecimal;
import java.math.BigInteger;
import com.bigdata.rdf.internal.DTE;
import com.bigdata.rdf.internal.IV;
import com.bigdata.rdf.lexicon.LexiconRelation;
import com.bigdata.rdf.model.BigdataLiteral;
import com.bigdata.rdf.model.BigdataValueFactory;
import com.bigdata.util.Bytes;
/** Implementation for inline <code>xsd:unsignedLong</code>. */
public class XSDUnsignedLongIV<V extends BigdataLiteral> extends
AbstractLiteralIV<V, BigInteger> {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* The unsigned long value.
*/
private final long value;
/**
* The unsigned long value.
*/
public long rawValue() {
return value;
}
public IV<V, BigInteger> clone(final boolean clearCache) {
final XSDUnsignedLongIV<V> tmp = new XSDUnsignedLongIV<V>(value);
if (!clearCache) {
tmp.setValue(getValueCache());
}
return tmp;
}
public XSDUnsignedLongIV(final long value) {
super(DTE.XSDUnsignedLong);
this.value = value;
}
/**
* Promote the <code>unsigned long</code> into a signed {@link BigInteger}.
*/
public final BigInteger promote() {
return promote(value);
}
public static BigInteger promote(final long value) {
return BigInteger.valueOf(value).subtract(BigInteger.valueOf(Long.MIN_VALUE));
}
final public BigInteger getInlineValue() {
return promote();
}
@SuppressWarnings("unchecked")
public V asValue(final LexiconRelation lex) {
V v = getValueCache();
if (v == null) {
final BigdataValueFactory f = lex.getValueFactory();
v = (V) f.createLiteral(value, true);
v.setIV(this);
setValue(v);
}
return v;
}
@Override
final public long longValue() {
return promote().longValue();
}
/*
* From the spec: If the argument is a numeric type or a typed literal with
* a datatype derived from a numeric type, the EBV is false if the operand
* value is NaN or is numerically equal to zero; otherwise the EBV is true.
*/
@Override
public boolean booleanValue() {
/*
* TODO This can be optimized using the known signed representation of
* the unsigned ZERO (this is true for all of the xsd:unsigned classes).
*/
return value != UNSIGNED_ZERO ? true : false;
}
static private final long UNSIGNED_ZERO = 0x8000000000000000L;
@Override
public byte byteValue() {
return (byte) promote().byteValue();
}
@Override
public double doubleValue() {
return (double) promote().doubleValue();
}
@Override
public float floatValue() {
return (float) promote().floatValue();
}
@Override
public int intValue() {
return (int) promote().intValue();
}
@Override
public short shortValue() {
return (short) promote().shortValue();
}
@Override
public String stringValue() {
return promote().toString();
}
@Override
public BigDecimal decimalValue() {
return new BigDecimal(promote());
}
@Override
public BigInteger integerValue() {
return promote();
}
public boolean equals(final Object o) {
if (this == o)
return true;
if (o instanceof XSDUnsignedLongIV<?>) {
return this.value == ((XSDUnsignedLongIV<?>) o).value;
}
return false;
}
/**
* Return the hash code of the long value.
*/
public int hashCode() {
return (int) (value ^ (value >>> 32));
}
public int byteLength() {
return 1 + Bytes.SIZEOF_LONG;
}
@SuppressWarnings("rawtypes")
@Override
public int _compareTo(final IV o) {
final XSDUnsignedLongIV<?> t = (XSDUnsignedLongIV<?>) o;
return value == t.value ? 0 : value < t.value ? -1 : 1;
}
}