com.hazelcast.query.impl.predicates.LikePredicate Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.query.impl.predicates;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import java.io.IOException;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Like Predicate
*/
public class LikePredicate extends AbstractPredicate {
protected String expression;
private volatile Pattern pattern;
public LikePredicate() {
}
public LikePredicate(String attributeName, String expression) {
this.attributeName = attributeName;
this.expression = expression;
}
@Override
protected boolean applyForSingleAttributeValue(Map.Entry mapEntry, Comparable attributeValue) {
String attributeValueString = (String) attributeValue;
if (attributeValueString == null) {
return (expression == null);
} else if (expression == null) {
return false;
} else {
if (pattern == null) {
// we quote the input string then escape then replace % and _
// at the end we have a regex pattern look like : \QSOME_STRING\E.*\QSOME_OTHER_STRING\E
final String quotedExpression = Pattern.quote(expression);
String regex = quotedExpression
//escaped %
.replaceAll("(?