/*
* 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 org.h2.api.ErrorCode;
import org.h2.engine.CastDataProvider;
import org.h2.engine.Constants;
import org.h2.message.DbException;
/**
* Base class for ARRAY and ROW values.
*/
public abstract class ValueCollectionBase extends Value {
/**
* Values.
*/
final Value[] values;
private int hash;
ValueCollectionBase(Value[] values) {
this.values = values;
}
public Value[] getList() {
return values;
}
@Override
public int hashCode() {
if (hash != 0) {
return hash;
}
int h = getValueType();
for (Value v : values) {
h = h * 31 + v.hashCode();
}
hash = h;
return h;
}
@Override
public int compareWithNull(Value v, boolean forEquality, CastDataProvider provider, CompareMode compareMode) {
if (v == ValueNull.INSTANCE) {
return Integer.MIN_VALUE;
}
ValueCollectionBase l = this;
int leftType = l.getValueType();
int rightType = v.getValueType();
if (rightType != leftType) {
throw v.getDataConversionError(leftType);
}
ValueCollectionBase r = (ValueCollectionBase) v;
Value[] leftArray = l.values, rightArray = r.values;
int leftLength = leftArray.length, rightLength = rightArray.length;
if (leftLength != rightLength) {
if (leftType == ROW) {
throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
}
if (forEquality) {
return 1;
}
}
if (forEquality) {
boolean hasNull = false;
for (int i = 0; i < leftLength; i++) {
Value v1 = leftArray[i];
Value v2 = rightArray[i];
int comp = v1.compareWithNull(v2, forEquality, provider, compareMode);
if (comp != 0) {
if (comp != Integer.MIN_VALUE) {
return comp;
}
hasNull = true;
}
}
return hasNull ? Integer.MIN_VALUE : 0;
}
int len = Math.min(leftLength, rightLength);
for (int i = 0; i < len; i++) {
Value v1 = leftArray[i];
Value v2 = rightArray[i];
int comp = v1.compareWithNull(v2, forEquality, provider, compareMode);
if (comp != 0) {
return comp;
}
}
return Integer.compare(leftLength, rightLength);
}
@Override
public boolean containsNull() {
for (Value v : values) {
if (v.containsNull()) {
return true;
}
}
return false;
}
@Override
public int getMemory() {
int memory = 72 + values.length * Constants.MEMORY_POINTER;
for (Value v : values) {
memory += v.getMemory();
}
return memory;
}
}