/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* Licensed 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 com.linkedin.pinot.tools.scan.query;
import com.linkedin.pinot.core.segment.index.readers.Dictionary;
import java.util.List;
public class RangePredicateFilter implements PredicateFilter {
private static final String SEPARATOR = "\t\t";
private int _startIndex;
private int _endIndex;
private final Dictionary _dictionary;
private final boolean _includeStart;
private final boolean _includeEnd;
public RangePredicateFilter(Dictionary dictionaryReader, List<String> predicateValue) {
_dictionary = dictionaryReader;
String[] values = predicateValue.get(0).split(SEPARATOR);
final String rangeString = predicateValue.get(0).trim();
// Trim the enclosing '[' and ']' as well.
String start = values[0].substring(1, values[0].length());
String end = values[1].substring(0, values[1].length() - 1);
_includeStart = !rangeString.trim().startsWith("(") || start.equals("*");
_includeEnd = !rangeString.trim().endsWith(")") || end.equals("*");
if (start.equals("*")) {
_startIndex = 0;
} else {
_startIndex = _dictionary.indexOf(start);
}
if (_startIndex < 0) {
_startIndex = -(_startIndex + 1);
} else if (!_includeStart) {
_startIndex++;
}
if (end.equals("*")) {
_endIndex = _dictionary.length() - 1;
} else {
_endIndex = _dictionary.indexOf(end);
}
if (_endIndex < 0) {
_endIndex = -(_endIndex + 1) - 1;
} else if (!_includeEnd) {
--_endIndex;
}
}
@Override
public boolean apply(int dictId) {
return ((dictId >= _startIndex) && (dictId <= _endIndex));
}
@Override
public boolean apply(int[] dictIds, int length) {
// length <= dictIds.length
for (int i = 0; i < length; ++i) {
if (apply(dictIds[i])) {
return true;
}
}
return false;
}
}