com.hazelcast.query.impl.predicates.GreaterLessPredicate Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, 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 com.hazelcast.nio.serialization.BinaryInterface;
import com.hazelcast.query.Predicate;
import com.hazelcast.query.impl.Comparables;
import com.hazelcast.query.impl.Comparison;
import com.hazelcast.query.impl.Index;
import com.hazelcast.query.impl.QueryContext;
import com.hazelcast.query.impl.QueryableEntry;
import java.io.IOException;
import java.util.Set;
/**
* Greater Less Predicate
*/
@BinaryInterface
public final class GreaterLessPredicate extends AbstractIndexAwarePredicate implements NegatablePredicate, RangePredicate {
private static final long serialVersionUID = 1L;
protected Comparable value;
boolean equal;
boolean less;
public GreaterLessPredicate() {
}
public GreaterLessPredicate(String attribute, Comparable value, boolean equal, boolean less) {
super(attribute);
if (value == null) {
throw new NullPointerException("Arguments can't be null");
}
this.value = value;
this.equal = equal;
this.less = less;
}
@Override
protected boolean applyForSingleAttributeValue(Comparable attributeValue) {
if (attributeValue == null) {
return false;
}
Comparable givenValue = convert(attributeValue, value);
attributeValue = (Comparable) convertEnumValue(attributeValue);
int result = Comparables.compare(attributeValue, givenValue);
return equal && result == 0 || (less ? (result < 0) : (result > 0));
}
@Override
public Set filter(QueryContext queryContext) {
Index index = matchIndex(queryContext, QueryContext.IndexMatchHint.PREFER_ORDERED);
if (index == null) {
return null;
}
final Comparison comparison;
if (less) {
comparison = equal ? Comparison.LESS_OR_EQUAL : Comparison.LESS;
} else {
comparison = equal ? Comparison.GREATER_OR_EQUAL : Comparison.GREATER;
}
return index.getRecords(comparison, value);
}
@Override
public void readData(ObjectDataInput in) throws IOException {
super.readData(in);
value = in.readObject();
equal = in.readBoolean();
less = in.readBoolean();
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
super.writeData(out);
out.writeObject(value);
out.writeBoolean(equal);
out.writeBoolean(less);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append(attributeName);
sb.append(less ? "<" : ">");
if (equal) {
sb.append("=");
}
sb.append(value);
return sb.toString();
}
@Override
public Predicate negate() {
return new GreaterLessPredicate(attributeName, value, !equal, !less);
}
@Override
public int getId() {
return PredicateDataSerializerHook.GREATERLESS_PREDICATE;
}
@SuppressWarnings({"checkstyle:npathcomplexity"})
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!super.equals(o)) {
return false;
}
if (!(o instanceof GreaterLessPredicate)) {
return false;
}
GreaterLessPredicate that = (GreaterLessPredicate) o;
if (!that.canEqual(this)) {
return false;
}
if (equal != that.equal) {
return false;
}
if (less != that.less) {
return false;
}
return value != null ? value.equals(that.value) : that.value == null;
}
@Override
public boolean canEqual(Object other) {
return (other instanceof GreaterLessPredicate);
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (value != null ? value.hashCode() : 0);
result = 31 * result + (equal ? 1 : 0);
result = 31 * result + (less ? 1 : 0);
return result;
}
@Override
public String getAttribute() {
return attributeName;
}
@Override
public Comparable getFrom() {
return less ? null : value;
}
@Override
public boolean isFromInclusive() {
return !less && equal;
}
@Override
public Comparable getTo() {
return less ? value : null;
}
@Override
public boolean isToInclusive() {
return less && equal;
}
}