/*
* 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.math.BigDecimal;
import org.h2.api.ErrorCode;
import org.h2.engine.CastDataProvider;
import org.h2.message.DbException;
/**
* Implementation of the DOUBLE PRECISION data type.
*/
public final class ValueDouble extends Value {
/**
* The precision in bits.
*/
static final int PRECISION = 53;
/**
* The approximate precision in decimal digits.
*/
public static final int DECIMAL_PRECISION = 17;
/**
* The maximum display size of a DOUBLE.
* Example: -3.3333333333333334E-100
*/
public static final int DISPLAY_SIZE = 24;
/**
* Double.doubleToLongBits(0d)
*/
public static final long ZERO_BITS = 0L;
/**
* The value 0.
*/
public static final ValueDouble ZERO = new ValueDouble(0d);
/**
* The value 1.
*/
public static final ValueDouble ONE = new ValueDouble(1d);
private static final ValueDouble NAN = new ValueDouble(Double.NaN);
private final double value;
private ValueDouble(double value) {
this.value = value;
}
@Override
public Value add(Value v) {
return get(value + ((ValueDouble) v).value);
}
@Override
public Value subtract(Value v) {
return get(value - ((ValueDouble) v).value);
}
@Override
public Value negate() {
return get(-value);
}
@Override
public Value multiply(Value v) {
return get(value * ((ValueDouble) v).value);
}
@Override
public Value divide(Value v, TypeInfo quotientType) {
ValueDouble v2 = (ValueDouble) v;
if (v2.value == 0.0) {
throw DbException.get(ErrorCode.DIVISION_BY_ZERO_1, getTraceSQL());
}
return get(value / v2.value);
}
@Override
public ValueDouble modulus(Value v) {
ValueDouble other = (ValueDouble) v;
if (other.value == 0) {
throw DbException.get(ErrorCode.DIVISION_BY_ZERO_1, getTraceSQL());
}
return get(value % other.value);
}
@Override
public StringBuilder getSQL(StringBuilder builder, int sqlFlags) {
if ((sqlFlags & NO_CASTS) == 0) {
return getSQL(builder.append("CAST(")).append(" AS DOUBLE PRECISION)");
}
return getSQL(builder);
}
private StringBuilder getSQL(StringBuilder builder) {
if (value == Double.POSITIVE_INFINITY) {
return builder.append("'Infinity'");
} else if (value == Double.NEGATIVE_INFINITY) {
return builder.append("'-Infinity'");
} else if (Double.isNaN(value)) {
return builder.append("'NaN'");
} else {
return builder.append(value);
}
}
@Override
public TypeInfo getType() {
return TypeInfo.TYPE_DOUBLE;
}
@Override
public int getValueType() {
return DOUBLE;
}
@Override
public int compareTypeSafe(Value o, CompareMode mode, CastDataProvider provider) {
return Double.compare(value, ((ValueDouble) o).value);
}
@Override
public int getSignum() {
return value == 0 || Double.isNaN(value) ? 0 : value < 0 ? -1 : 1;
}
@Override
public BigDecimal getBigDecimal() {
if (Double.isFinite(value)) {
return BigDecimal.valueOf(value);
}
// Infinite or NaN
throw DbException.get(ErrorCode.DATA_CONVERSION_ERROR_1, Double.toString(value));
}
@Override
public float getFloat() {
return (float) value;
}
@Override
public double getDouble() {
return value;
}
@Override
public String getString() {
return Double.toString(value);
}
@Override
public int hashCode() {
/*
* NaNs are normalized in get() method, so it's safe to use
* doubleToRawLongBits() instead of doubleToLongBits() here.
*/
long hash = Double.doubleToRawLongBits(value);
return (int) (hash ^ (hash >>> 32));
}
/**
* Get or create a DOUBLE PRECISION value for the given double.
*
* @param d the double
* @return the value
*/
public static ValueDouble get(double d) {
if (d == 1.0) {
return ONE;
} else if (d == 0.0) {
// -0.0 == 0.0, and we want to return 0.0 for both
return ZERO;
} else if (Double.isNaN(d)) {
return NAN;
}
return (ValueDouble) Value.cache(new ValueDouble(d));
}
@Override
public boolean equals(Object other) {
if (!(other instanceof ValueDouble)) {
return false;
}
return compareTypeSafe((ValueDouble) other, null, null) == 0;
}
}