/*
* 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.hadoop.hive.accumulo.predicate.compare;
import java.util.regex.Pattern;
/**
* Set of comparison operations over a string constant. Used for Hive predicates involving string
* comparison.
*
* Used by {@link org.apache.hadoop.hive.accumulo.predicate.PrimitiveComparisonFilter}
*/
public class StringCompare implements PrimitiveComparison {
@SuppressWarnings("unused")
private String constant;
@Override
public void init(byte[] constant) {
this.constant = serialize(constant);
}
@Override
public boolean isEqual(byte[] value) {
return serialize(value).equals(constant);
}
@Override
public boolean isNotEqual(byte[] value) {
return !isEqual(value);
}
@Override
public boolean greaterThanOrEqual(byte[] value) {
return serialize(value).compareTo(constant) >= 0;
}
@Override
public boolean greaterThan(byte[] value) {
return serialize(value).compareTo(constant) > 0;
}
@Override
public boolean lessThanOrEqual(byte[] value) {
return serialize(value).compareTo(constant) <= 0;
}
@Override
public boolean lessThan(byte[] value) {
return serialize(value).compareTo(constant) < 0;
}
@Override
public boolean like(byte[] value) {
String temp = new String(value).replaceAll("%", "[\\\\\\w]+?");
Pattern pattern = Pattern.compile(temp);
boolean match = pattern.matcher(constant).matches();
return match;
}
public String serialize(byte[] value) {
return new String(value);
}
}