/*
* 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;
import org.h2.util.Bits;
/**
* Implementation of the INTEGER data type.
*/
public final class ValueInteger extends Value {
/**
* The precision in bits.
*/
public static final int PRECISION = 32;
/**
* The approximate precision in decimal digits.
*/
public static final int DECIMAL_PRECISION = 10;
/**
* The maximum display size of an INT.
* Example: -2147483648
*/
public static final int DISPLAY_SIZE = 11;
private static final int STATIC_SIZE = 128;
// must be a power of 2
private static final int DYNAMIC_SIZE = 256;
private static final ValueInteger[] STATIC_CACHE = new ValueInteger[STATIC_SIZE];
private static final ValueInteger[] DYNAMIC_CACHE = new ValueInteger[DYNAMIC_SIZE];
private final int value;
static {
for (int i = 0; i < STATIC_SIZE; i++) {
STATIC_CACHE[i] = new ValueInteger(i);
}
}
private ValueInteger(int value) {
this.value = value;
}
/**
* Get or create an INTEGER value for the given int.
*
* @param i the int
* @return the value
*/
public static ValueInteger get(int i) {
if (i >= 0 && i < STATIC_SIZE) {
return STATIC_CACHE[i];
}
ValueInteger v = DYNAMIC_CACHE[i & (DYNAMIC_SIZE - 1)];
if (v == null || v.value != i) {
v = new ValueInteger(i);
DYNAMIC_CACHE[i & (DYNAMIC_SIZE - 1)] = v;
}
return v;
}
@Override
public Value add(Value v) {
ValueInteger other = (ValueInteger) v;
return checkRange((long) value + (long) other.value);
}
private static ValueInteger checkRange(long x) {
if ((int) x != x) {
throw DbException.get(ErrorCode.NUMERIC_VALUE_OUT_OF_RANGE_1, Long.toString(x));
}
return ValueInteger.get((int) x);
}
@Override
public int getSignum() {
return Integer.signum(value);
}
@Override
public Value negate() {
return checkRange(-(long) value);
}
@Override
public Value subtract(Value v) {
ValueInteger other = (ValueInteger) v;
return checkRange((long) value - (long) other.value);
}
@Override
public Value multiply(Value v) {
ValueInteger other = (ValueInteger) v;
return checkRange((long) value * (long) other.value);
}
@Override
public Value divide(Value v, TypeInfo quotientType) {
int y = ((ValueInteger) v).value;
if (y == 0) {
throw DbException.get(ErrorCode.DIVISION_BY_ZERO_1, getTraceSQL());
}
int x = value;
if (x == Integer.MIN_VALUE && y == -1) {
throw DbException.get(ErrorCode.NUMERIC_VALUE_OUT_OF_RANGE_1, "2147483648");
}
return ValueInteger.get(x / y);
}
@Override
public Value modulus(Value v) {
ValueInteger other = (ValueInteger) v;
if (other.value == 0) {
throw DbException.get(ErrorCode.DIVISION_BY_ZERO_1, getTraceSQL());
}
return ValueInteger.get(value % other.value);
}
@Override
public StringBuilder getSQL(StringBuilder builder, int sqlFlags) {
return builder.append(value);
}
@Override
public TypeInfo getType() {
return TypeInfo.TYPE_INTEGER;
}
@Override
public int getValueType() {
return INTEGER;
}
@Override
public byte[] getBytes() {
byte[] b = new byte[4];
Bits.writeInt(b, 0, getInt());
return b;
}
@Override
public int getInt() {
return value;
}
@Override
public long getLong() {
return value;
}
@Override
public BigDecimal getBigDecimal() {
return BigDecimal.valueOf(value);
}
@Override
public float getFloat() {
return value;
}
@Override
public double getDouble() {
return value;
}
@Override
public int compareTypeSafe(Value o, CompareMode mode, CastDataProvider provider) {
return Integer.compare(value, ((ValueInteger) o).value);
}
@Override
public String getString() {
return Integer.toString(value);
}
@Override
public int hashCode() {
return value;
}
@Override
public boolean equals(Object other) {
return other instanceof ValueInteger && value == ((ValueInteger) other).value;
}
}