/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.api.java.typeutils.runtime;
import org.apache.flink.api.common.typeutils.TypeComparator;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.java.tuple.Tuple;
import org.apache.flink.core.memory.MemorySegment;
import org.apache.flink.types.KeyFieldOutOfBoundsException;
import org.apache.flink.types.NullFieldException;
import org.apache.flink.types.NullKeyFieldException;
public final class TupleComparator<T extends Tuple> extends TupleComparatorBase<T> {
private static final long serialVersionUID = 1L;
public TupleComparator(int[] keyPositions, TypeComparator<?>[] comparators, TypeSerializer<?>[] serializers) {
super(keyPositions, comparators, serializers);
}
private TupleComparator(TupleComparator<T> toClone) {
super(toClone);
}
// --------------------------------------------------------------------------------------------
// Comparator Methods
// --------------------------------------------------------------------------------------------
@SuppressWarnings("unchecked")
@Override
public int hash(T value) {
int i = 0;
try {
int code = this.comparators[0].hash(value.getFieldNotNull(keyPositions[0]));
for (i = 1; i < this.keyPositions.length; i++) {
code *= HASH_SALT[i & 0x1F]; // salt code with (i % HASH_SALT.length)-th salt component
code += this.comparators[i].hash(value.getFieldNotNull(keyPositions[i]));
}
return code;
}
catch (NullFieldException nfex) {
throw new NullKeyFieldException(nfex);
}
catch (IndexOutOfBoundsException iobex) {
throw new KeyFieldOutOfBoundsException(keyPositions[i]);
}
}
@SuppressWarnings("unchecked")
@Override
public void setReference(T toCompare) {
int i = 0;
try {
for (; i < this.keyPositions.length; i++) {
this.comparators[i].setReference(toCompare.getFieldNotNull(this.keyPositions[i]));
}
}
catch (NullFieldException nfex) {
throw new NullKeyFieldException(nfex);
}
catch (IndexOutOfBoundsException iobex) {
throw new KeyFieldOutOfBoundsException(keyPositions[i]);
}
}
@SuppressWarnings("unchecked")
@Override
public boolean equalToReference(T candidate) {
int i = 0;
try {
for (; i < this.keyPositions.length; i++) {
if (!this.comparators[i].equalToReference(candidate.getFieldNotNull(this.keyPositions[i]))) {
return false;
}
}
return true;
}
catch (NullFieldException nfex) {
throw new NullKeyFieldException(nfex);
}
catch (IndexOutOfBoundsException iobex) {
throw new KeyFieldOutOfBoundsException(keyPositions[i]);
}
}
@SuppressWarnings("unchecked")
@Override
public int compare(T first, T second) {
int i = 0;
try {
for (; i < keyPositions.length; i++) {
int keyPos = keyPositions[i];
int cmp = comparators[i].compare(first.getFieldNotNull(keyPos), second.getFieldNotNull(keyPos));
if (cmp != 0) {
return cmp;
}
}
return 0;
}
catch (NullFieldException nfex) {
throw new NullKeyFieldException(nfex);
}
catch (IndexOutOfBoundsException iobex) {
throw new KeyFieldOutOfBoundsException(keyPositions[i]);
}
}
@SuppressWarnings("unchecked")
@Override
public void putNormalizedKey(T value, MemorySegment target, int offset, int numBytes) {
int i = 0;
try {
for (; i < this.numLeadingNormalizableKeys && numBytes > 0; i++) {
int len = this.normalizedKeyLengths[i];
len = numBytes >= len ? len : numBytes;
this.comparators[i].putNormalizedKey(value.getFieldNotNull(this.keyPositions[i]), target, offset, len);
numBytes -= len;
offset += len;
}
} catch (NullFieldException nfex) {
throw new NullKeyFieldException(nfex);
} catch (NullPointerException npex) {
throw new NullKeyFieldException(this.keyPositions[i]);
}
}
@Override
public int extractKeys(Object record, Object[] target, int index) {
int localIndex = index;
for(int i = 0; i < comparators.length; i++) {
localIndex += comparators[i].extractKeys(((Tuple) record).getField(keyPositions[i]), target, localIndex);
}
return localIndex - index;
}
public TypeComparator<T> duplicate() {
return new TupleComparator<T>(this);
}
}